MINIMUM DESIGN STANDARDS For The CITY OF KINGSPORT

Issued 10/2014 1

MINIMUM

DESIGN

STANDARDS

For

The

CITY OF KINGSPORT

Issued 10/2014 2

CITY OF KINGSPORT

MINIMUM

DESIGN STANDARDS

TABLE OF CONTENTS

SECTION PAGE

1. Introduction 3-5

2. General Provisions 6-10

3. Streets 11-18

4. Traffic 19-43

5. Excavation and Pipe Trenches 44

6. Water Distribution 45-56

7. Sanitary Sewer Collection System 57-59

8. Wastewater Pump Stations 60-69

9. Storm Water Management, Erosion Prevention, and

Sediment Control 70

10. Landscaping 71-77

11. Submittal Requirements 78-84

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1. Introduction

1-1 Purpose

The intent of this document is to provide the design professional with

guidelines and requirements for designing projects within the bounds of

the City of Kingsport.

The requirements contained in this document are in addition and

supplementary to all applicable Federal and State laws and regulations,

and ordinances of the City of Kingsport, including the codes adopted

therein.

1-2 Definitions

ARCHITECT – An individual licensed and registered by the State of

Tennessee to practice architecture in the State of Tennessee.

CITY ENGINEER - The City Engineer of the City of Kingsport, an

assistant or other representative duly authorized by the City Engineer.

CONTRACTOR - The successful Bidder to whom a contract has been

awarded and who has executed the contract documents.

EASEMENT - A property right to use or control real property of another.

ENGINEER – An individual licensed and registered by the State of

Tennessee to practice engineering in the State of Tennessee.

INSPECTOR - The Construction Inspector, or other representative duly

authorized by the City Engineer.

INVERT - The lowest point in the internal cross section of a pipe or other

culvert.

PLANS - The approved plans, profiles, standard details, supplemental

plans, and working drawings, which show the location, dimensions, and

details of the work to be done.

RIGHT-OF-WAY - A portion of land being used or in the future dedicated

to use as a street, road, thoroughfare or crosswalk, pipeway, drainage

canal, and/or similar use and designated by means of a right-of-way line.

SPECIFICATIONS - The general term comprising all the directions,

provisions, and requirements contained or referred to in the document

entitled "City of Kingsport Construction Specifications", of latest issue.

SUBGRADE - That portion of the roadbed prepared as a foundation for

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the pavement structure.

TRAFFIC ENGINEER - The individual with supervisory responsibility

over the Traffic Engineering Division of the City of Kingsport.

1-3 Abbreviations

AASHTO American Association of State Highway and Transportation

Officials

A.B.S. Acrylonitrile Butadiene Styrene

A.D.A. Americans with Disabilities Act

ADT Average Daily Traffic

A.F.F. Above Finish Floor

ANSI American National Standards Institute

ASTM American Society of Testing and Materials

AWWA American Water Works Association

F Fahrenheit

ft. foot

gpd gallons per day

gpm gallons per minute

ID Internal Diameter

lbs. pounds

MSL Mean Sea Level

MUTCD Manual on Uniform Traffic Control Devices

N.E.C. National Electric Code

NFiPA National Fire Protection Association

OD Outside Diameter

OSHA Occupational Safety and Health Association

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P.C. Point of Curvature

PE Professional Engineer

PLS Professional Land Surveyor

ppm parts per million

psi pounds per square inch

P.T. Point of Tangency

PVC Polyvinyl Chloride

P.V.C. Point of Curvature on Vertical Curve

P.V.T. Point of Tangency on Vertical Curve

Qmax maximum discharge

Qmin minimum discharge

RH Relative Humidity

SCS Soil Conservation Service

sec. second

s.f. square feet

SU Single Unit Truck (with 20 feet wheelbase and 30 foot

overall length)

TDEC Tennessee Division of Environment and Conservation

TDOT Tennessee Division of Transportation

TOSHA Tennessee Occupational Safety and Health Administration

UL Underwriters' Laboratories, Inc.

V Volts

VAC Voltage - Alternating Current

Issued 10/2014 6

2. General Provisions

2-1 General

All construction on public infrastructure, all infrastructure that will be

public and all infrastructure that is likely to become public shall conform

to the requirements and dimensions on the approved construction plans,

latest revisions of the City of Kingsport Construction Specifications, the

Code of Ordinances of the City of Kingsport, The Kingsport Planning

Region Subdivision Regulations, applicable Federal and State regulations,

or any other requirements as contained herein. The design of streets, water

systems, storm drainage systems, and grading plans shall be signed and

sealed by a Professional Engineer, Professional Land Surveyor, Architect

or Landscape Architect currently registered with the State of Tennessee.

All standards and regulations shall be maintained unless good engineering

practices determine otherwise. These modifications will be determined by

the City of Kingsport Public Works Department staff/management.

2-2 Inspections

The Contractor shall provide the necessary personnel and equipment

required as a part of the inspection process. The presence of the City

Engineer or Inspector at the work site shall in no way lessen the

Contractor's responsibility for conformity with the plans and

specifications. Should the City Engineer or Inspector accept materials, or

work that does not conform with plans and specifications, whether from

lack of discovery or for any other reason, it shall in no way prevent later

rejection or corrections to the unsatisfactory materials or work when

discovered. The Contractor shall have no claim for losses suffered from

any necessary removals or repairs resulting from the unsatisfactory work.

Any work which has been covered without the Inspector's approval, shall,

at the Inspector's request, be uncovered and be made available for

inspection at the Contractor's expense. Work performed before or after

City staff's normal work hours or during the weekend or City Holidays

shall be approved in advance by the City Engineer or their designee and

shall comply with the City Code and shall include only such tasks that do

not require observation by an Inspector.

2-3 Maintenance of Traffic

2-3.1 General

When construction occurs in a traffic zone, traffic control devices

shall be erected, maintained, relocated, and removed in accordance

with the plans, specifications, and MUTCD. This requirement shall

apply for all construction occurring on public streets, and right of

way including construction or repairs by utility companies. The

MUTCD referred to in this provision shall be the current edition of

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the Manual on Uniform Traffic Control Devices for Streets and

Highways. The current edition shall be the edition current at the

time of construction.

Traffic control devices shall include but not be limited to signs,

drums, barricades, cones, delineators, flashing arrow panels,

temporary guardrail, temporary concrete median barrier, vehicle-

mounted temporary impact attenuators, pavement marking, raised

reflective pavement markers, flaggers and pilot vehicles.

The Contractor/Developer shall be responsible for notification to

all emergency service agencies shall occur prior to beginning

construction. These agencies consist of the Kingsport Fire Division

and the Kingsport Police Division Communications Division.

2-3.2 Materials

Unless otherwise required, materials used in the fabrication and

installation of construction traffic control devices shall be in

accordance with the applicable provisions of the MUTCD.

2-3.3 Installation and Maintenance

Existing public streets or highways shall be kept open to traffic at

all times by the Contractor unless permission to close the street or

sidewalk or mobility path, or portions thereof, is granted by the

City Traffic Engineer, the Fire Chief, the Police Division, the

Public Works Division, TDOT’s Division Traffic Engineer, and/or

a designated representative, a minimum of 72 hours prior to any

closing or partial closing.

Work on any project shall not start until all traffic control devices

required for the particular work activity are properly installed.

Traffic control devices shall be properly maintained, relocated as

necessary, cleaned and operated during the time they are in use.

During periods when use of the devices is not warranted, they shall

be removed from the work area, covered, or otherwise positioned

so that they do not convey their message to the traveling public.

The location, legends, sheeting, dimension, number of supports,

and horizontal and vertical placement of warning signs, barricades,

and other traffic control devices shall be as required by the

approved plans or the MUTCD. Weeds, brush, trees, construction

materials, equipment, etc. shall not be allowed to obscure any

traffic control device in use.

Competent and properly trained, attired and equipped flaggers,

using "stop" and "slow" paddles shall be provided when two-way

Issued 10/2014 8

traffic cannot be maintained or as determined by the City Traffic

Engineer or Construction Inspector.

The Contractor shall assume full responsibility for the continuous

and expeditious maintenance or replacement of all construction

warning signs, barricades, and other traffic control devices. The

Contractor shall continuously review and maintain all traffic

control measures to assure that adequate provisions have been

made for the safety of the public and workers. Failure to maintain

all traffic control devices in a satisfactory condition shall be cause

for suspension of construction operations until proper traffic

control is re-established.

2-4 Permits

During the course of designing, and prior to construction of a utility or

street project, all necessary permits from the City, State, or Federal

Government shall be obtained. City issued permits are described herein.

Coordinate with all other required permits with applicable local, state, or

federal agencies.

2-4.1 Grading Permit

A Grading Permit is required whenever the denuded area on a

project is to be 2,500 square feet or greater. A Grading Permit may

be issued after plans are approved and prior to any grading or site

work. The Grading Permit is issued by the Building Division. If

the proposed project disturbs 10,000 square feet or greater, an

Erosion Prevention and Sediment Control Plan for the project shall

be turned into the City at the time of site plan submittal. In certain

situations, a Grading Permit may not be required on City, County,

State or Federal construction projects.

2-4.2 Driveway Permit

A driveway entrance permit is required prior to the construction or

modification of all driveways or connections within the right of

way of a City maintained street. The driveway shall be indicated

on the site plan and shall conform to City Standards and

Subdivision Regulations. The permit application shall be obtained

from the City’s Traffic Division.

2-4.3 Blasting Permit

A Blasting Permit is required any time there is to be transportation,

use or storage of explosive materials. This permit is required a

minimum of 24 hours in advance of any blasting operations and

shall be obtained from the State of Tennessee.

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2-4.4 Right of Way Disturbance Permit

A Right of Way Disturbance Permit shall be obtained from the

Public Works Division for all utility cuts, sidewalk modification,

utility pole locations/installations/borings, trenching, roadway

widening, curb and gutter, and storm drainage connections to the

City storm drainage system. All repairs proposed for construction

shall be in conformance with the City of Kingsport Construction

Specifications.

2-4.5 Demolition Permit

A Demolition Permit shall be obtained from the Building Division

for any and all demolition of commercial or residential buildings.

2-5 Acceptance Procedures

All improvements intended for public maintenance are eligible for

acceptance by the City of Kingsport following the procedures outlined

below:

2-5.1 After the installation of improvements in accordance with

approved plans and City of Kingsport Construction Specifications,

the Owner/Developer or designee shall contact the Engineering

Division and schedule a completion inspection.

2-5.2 The Engineering Division will accept the improvements or respond

with a punch list within 30 days of the request.

2-5.3 The Owner/Developer or designee shall complete all items

indicated on the punch list, and any additional items noted, within

60 days or the punch list will be void. The Owner/Developer or

designee shall then request another completion (final) inspection.

2-5.4 Upon the acceptable completion of all punch list items and

payment of any outstanding fees, the Owner/Developer or designee

will receive an acceptance letter from the City of Kingsport

Engineering Division. This acceptance begins a warranty for

materials and workmanship for 1 year from the date of acceptance.

2-5.5 Upon completion of, or just prior to the end of, the warranty

period, the Owner/Developer or designee shall request a final

inspection from the Engineering Division.

2-5.6 The Engineering Division will respond with final acceptance or a

punch list on workmanship or materials within 30 days of the

request.

2-5.7 The Owner/Developer or designee shall complete all items

indicated on the punch list, and any additional items noted within

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60 days or the punch list will be void. The Owner/Developer or

designee shall then request another final inspection.

2-6 License Requirements

All contractors performing any construction activity involving the City of

Kingsport shall be licensed to practice contracting in the State of

Tennessee. The contractor shall be classified in the appropriate area of

license for the type construction to be performed and shall not perform

construction activity which exceeds the limitations of the designated

contractor's license.

2-7 Retaining Walls

All retaining walls with a height of 4 feet or greater shall be designed by a

professional engineer and shall be signed and sealed. The design of

retaining walls within the public right of way shall be submitted to the

Engineering Division for approval prior to construction.

Any retaining wall meeting the height criteria listed herein and located on

private property shall be submitted to the City’s Building Division and

shall comply with the current adopted City Building Code. All necessary

permits (e.g. building permit) shall be obtained prior to any construction

associated with the retaining wall.

2-8 Bridges

All vehicular and pedestrian bridges shall be designed by a Professional

Engineer and shall be properly signed and sealed. The design shall be

submitted to the Engineering Division for approval prior to construction.

All necessary permits (e.g. those required by the U.S.

Army Corps of Engineers) shall be obtained prior to construction.

Vehicular bridges shall be designed to meet or exceed all local, state, and

federal highway loading requirements.

2-9 Disciplines Not Covered

These Standards are not intended to be all-inclusive, and should not be

used in lieu of applicable State and Federal guidelines. When a conflict

arises between City, State, or Federal guidelines, the more stringent shall

govern.

Disciplines not covered under this Standard include, but are not limited to,

Structural Engineering, Building Codes, Architectural Design, Electrical,

HVAC, Life Safety, Fire Safety, and other applicable laws or requirements

as determined by the City of Kingsport.

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3. Streets

3-1 General

All work and materials shall conform to the latest edition of the City of

Kingsport Construction Specifications, Kingsport Planning Region

Minimum Subdivision Regulations, latest City adopted revision of the

International Building Code, any applicable State and Federal regulations,

and/or the Tennessee Division of Transportation Standard Specifications

for Road and Bridge Construction, as determined by the City Engineer.

3-2 Earth Work Requirements

3-2.1 Grading the Right-of-Way

The entire width of the right-of-way shall be graded to conform

with a cross-section that will have a maximum of +/-5% and a

minimum of +/-2% slope extending from the back side of roadway

to the right-of-way limit.

3-2.2 Side Slopes and Embankments

The maximum cut and fill slope permitted shall be 50% or two

horizontal units to one vertical unit (2:1). Any terrain with a slope

greater than 2:1 shall be designed by a professional engineer and

approved by the City Engineer. The City Engineer withholds the

right to require a geotechnical report for any slope that could

endanger the welfare of the general public.

Fill embankments shall be formed of suitable material placed in

successive layers not to exceed more than 6 inches in depth for the

full width of the roadway cross-section, and 12 inches in the slope

and embankment area. No stumps, trees, brush, rubbish or other

unsuitable materials or substances shall be placed in the

embankment. Each successive layer shall be thoroughly compacted

by a sheepsfoot tamping roller, 10-ton minimum power roller,

pneumatic-tired roller, or other standard method approved by the

City Engineer.

Spreading and compacting of material shall be performed in

accordance with the pertinent section of the Tennessee Division of

Transportation Standard Specifications for Road and Bridge

Construction, of latest issue.

3-2.3 Roadway Subgrade

The subgrade shall be prepared in reasonably close conformity

with the lines and grades as shown on the approved plans and as

staked correctly in the field. The subgrade shall be proof-rolled

with a loaded tandem axle dump truck (to the approval of the City

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Engineer or his designee), and soft areas which show will be

undercut and brought to the lines and grades by spreading and

compacting suitable material in sufficient quantity. Compaction of

the subgrade shall conform to the pertinent section of the

Tennessee Division of Transportation Standard Specifications for

Road and Bridge Construction, of latest issue.

Excavation and undercutting shall be completed per the

requirements of the latest revision of the Tennessee Division of

Transportation Standard Specifications for Road and Bridge

Construction, Section 203.

The Contractor shall construct the final road geometry, elevations,

and typical section as shown on the approved Plans. Unless

otherwise approved by the City Engineer, the final grade between

the back of curbs and the right-of-way shall slope ¼-inch vertical

per 1 foot horizontal toward the top of the curb.

The Contractor shall be responsible for having a registered

Geotechnical Engineer provide appropriate compaction testing of

the excavation and undercut. Compaction testing shall be taken at

a frequency determined by the Geotechnical Engineer, but the City

Engineer reserves the right to require tests to be taken in

questionable areas. The Geotechnical Engineer shall provide the

City with compaction testing results and certify that all excavations

were constructed per TDOT and City of Kingsport requirements.

The Geotechnical Engineer shall be a licensed engineer and place

his seal and signature on the certification. The certification shall

be received by the City Engineer prior to construction of any

pavement sections, curbs, gutters or other structures on the

excavations.

Prior to placement of any pavement base material, the elevation of

the subgrade shall be checked by the owner’s engineer or surveyor,

and the engineer or surveyor shall certify that the lines and grades

of the approved plans have been constructed.

3-2.4 Trenching

Trenches for storm water pipe, water lines, sanitary sewer lines,

natural gas lines, electric power and telecommunications lines that

are within the limits of an improved surface shall be back-filled

with crushed stone (pug). The crushed stone material shall be

placed in layers not to exceed 6 inches in depth, and each

successive layer shall be tamped with a mechanical tamper

specifically designed for the direct purpose of compacting material

in confined space, such as trenches.

Issued 10/2014 13

3-3 Design Speed and Sight Distance

3-3.1 For Residential Streets

The design speed sight distances for streets serving predominantly

residential areas shall comply with the design standards set forth in

Article 4 of the Subdivision Regulations.

3-3.2 For Non-Residential Streets

The design speed for non-residential streets will be determined by

considering factors such as the proposed or intended land use along

the street, the level of safety and convenience proposed or desired

for the street, and the vehicle classification, volume and pedestrian

mix likely to use the street. The sight distances for stopping,

passing, and intersections will meet or exceed the limits specified

in the latest edition of the American Association of State Highway

and Transportation Officials’, A Policy on Geometric Design of

Highways and Streets, the Green Book.

3-4 Alignment

3-4.1 Horizontal Alignment

The minimum radii for residential and non-residential streets shall

comply with the American Association of State Highway and

Transportation Officials’, A Policy on Geometric Design of

Highways and Streets, the Green Book. Residential streets may

conform to the low speed minimum design criteria.

3-4.2 Vertical Alignment

Minimum Vertical Curve Length: All changes in grade shall be

connected by vertical curves of minimum length as established by

the design speed and required sight distance. The relationship

between the K value and the length of a vertical curve shall be

based on the minimum K values for vertical alignment as

established in the American Association of State Highway and

Transportation Officials’, A Policy on Geometric Design of

Highways and Streets, the Green Book.

3-4.3 Street Grades

Street grades on collector and arterial streets shall not exceed 12

percent. Grades on other streets may exceed 12 percent but not 15

percent. The minimum grade shall not be less than 0.5 percent.

3-5 Pavement Design

A minimum pavement section is established by these standards for local,

Collector, and light industrial streets. To determine if the minimum

pavement section can be utilized, a series of soil tests shall be conducted

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and submitted. Each construction plan shall be submitted with a sufficient

amount of soil data and a pavement design based on application of the

measured soil data.

3-5.1 Minimum Number of Soil Samples

The minimum required soil data shall include at least one test for

each discrete classification of subgrade to be enumerated within

the roadway construction lines. The location of each test shall be

indicated on the site plan or present layout sheet.

3-5.2 Minimum Required Soil Tests

Each soil test shall include a Standard Proctor Test (ASTM D

698); Atterberg Limit Test (ASTM D 423 and D424); Unified Soil

Classification; and a California Bearing Ratio Test (ASTM D

1883). The test results shall be submitted as supplemental data

with the site plan or construction plans and shall indicate the date,

time, place of testing, and the person or firm supervising the test.

3-5.3 Minimum Pavement Section

The minimum pavement section shall be as follows:

A. For Collector, Non – Residential, Alleys, Lanes, Local,

Residential, and Marginal Access Streets:

1. Asphalt Concrete Surface Layer and Asphalt

Concrete Binder Layer over a Mineral Aggregate

Base:

As defined in the Subdivision Regulations for each

applicable street designation cross section and

pavement schedule.

2. Full Depth Asphalt concrete:

1-1/4 inches of surface mix

1-1/2 inches of binder mix

1-3/4 inches of asphalt treated base mix

2-1/2 inches of asphalt treated drainage mix

3. Portland Cement Concrete:

7 inches of portland cement concrete

2 inches of mineral aggregate base material

Issued 10/2014 15

3-6 Curb and Gutter Section

With the exception of the residential rural street described in the

Subdivision Regulations, all streets shall have as a part of their pavement

section a portland cement concrete combined curb and gutter. Three types

of combined curb and gutter may be used: a vertical faced (standard), a

mountable type, and rollover curb. See Section 3-9.4 for discussion of

median curbs. Details of the dimensions of these curbs are shown in the

Construction Specifications. Non-anchored/stand alone extruded curb

shall not be permitted.

3-7 Stormwater Manholes or Catch Basins

Stormwater manholes or catch basins will be TDOT standard structures as

shown in the TDOT Standard Roadway and Structure Drawings manual of

latest revision.

3-8 Sidewalks / Mobility (Shared Use) Paths, and Bicycle Paths

3-8.1 Sidewalks and Mobility Paths

Sidewalks shall be provided as specified in the Subdivision

Regulations and in Table 1 of this document. Sidewalks shall be a

minimum of 5 feet wide and 4 inches thick - concrete, and mobility

paths shall be a minimum of 8 feet wide and 4 inches thick

(concrete) or 2 inches thick (asphalt). In areas of high volume

pedestrian traffic, additional width may be required.

The City Engineer will determine whether concrete or asphalt will

be used for mobility path material.

Where concrete is used, both shall be constructed of no less than

4,000 psi portland cement concrete. The subgrade shall be

adequately graded and shall be compacted with a mechanical

tamper specifically designed for the direct purpose of compacting

subgrade material. The subgrade density shall conform to the

compaction requirements of the TDOT Standard Specifications for

Road and Bridge Construction, of latest issue. Refer to the

Construction Specifications for more detail on how to finish and

joint the concrete. The sidewalk area of driveway aprons shall have

a minimum thickness of 6 inches. The thickness of the asphalt

apron area shall be 4 inches.

3-8.2 Bicycle Paths

Bicycle paths shall be a minimum of 10 feet wide and may be

constructed of asphalt concrete or portland cement concrete, with

pavement section thicknesses as follows:

Issued 10/2014 16

A. Asphalt Concrete and Mineral Aggregate Base:

2 inches of asphalt concrete surface mix (4 inches in

driveway apron) with 4 inches of mineral aggregate base.

B. Portland Cement Concrete on subgrade:

4 inches of 4,000 psi portland cement concrete (6 inches in

driveway apron) with 2 inches of mineral aggregate base.

The subgrade for both of these pavements shall be adequately

graded and shall be compacted with a mechanical tamper

specifically designed for the direct purpose of compacting

subgrade material. The subgrade density shall conform to the

compaction requirements of the TDOT Standard Specifications for

Road and Bridge Construction, of latest issue.

3-9 Medians

3-9.1 General

Medians are a desirable feature and where medians are planned,

they shall be of adequate width to “shadow” a single unit design

vehicle. A median shall not be less than 15 feet wide as measured

from the face of curb located on each side of the median. However,

where a left turn or U turn lane occupies a portion of a median, the

medial separator shall be no less than 4 feet wide as measured from

the face of curb located on each side of the medial separator. To

comply with these requirements, in some designs the width of a

median will transition to a wider cross-section in the vicinity of

turn lanes and then transition back to the minimum width between

turn lanes or intersections. The median cross-section may be raised

or depressed, and may be landscaped. However, in no case shall

the ground, plants, shrubs, or trees block the stopping or the

intersection sight distances that are required for the specified

design speed.

3-9.2 Spacing

Median openings, cross streets or high traffic volume driveways

shall be spaced no closer than 500 feet as measured from center of

opening to the center of the adjacent opening on City roadways.

Median opening spacing on state routes are determined by the

Tennessee Department of Transportation (TDOT).

3-9.3 Geometric Design

The geometric design of medians shall comply with the American

Association of State Highway and Transportation Official’s, A

Policy on Geometric Design of Highways and Streets, latest

edition, the Green Book.

Issued 10/2014 17

3-9.4 Median Curbs

Medians shall be curbed with a mountable curb as shown in the

Construction Specifications. On non-residential streets the median

curb may be a detached mountable curb conforming to the types

approved by TDOT.

3-10 Safety Features

3-10.1 General

Roadway hazards that may require shielding by a roadside barrier

are classified in two categories: embankment hazards and fixed

objects.

The design of guardrails shall be in accordance with the TDOT

Standard Roadway and Structure Drawings manual of latest

revision.

3-10.2 Embankments

Embankment criteria for warranting guardrail in a fill section shall

depend on the height and slope of embankments as specified in the

TDOT Standard Roadway and Structure Drawings manual of latest

revision, and the American Association of State and Transportation

Official’s Roadside Design Guidelines, of latest issue.

3-10.3 Fixed Objects

A clear, unobstructed, flat roadside is highly desirable. When these

conditions cannot be met, criteria to establish barriers needed for

shielding roadside objects are necessary. The removal of fixed

objects should be considered as the first alternative. If it is not

feasible or possible to remove or relocate a hazard, then a barrier

may be necessary. A barrier should be installed only if it is clear

that the barrier offers the least hazard potential. Refer to the TDOT

Standard Roadway and Structure Drawings manual of latest

revision and the American Association of State and Transportation

Official’s Roadside Design Guidelines, of latest issue, for roadside

clear zone and barrier requirements. Residential streets of the

classification of minor collector and lower may be exempt from the

clear zone requirements. However, this exemption should not

preclude proper professional judgment when designing the

roadside.

3-10.4 Vertical Clearance

Permanently anchored overhead objects such as bridges shall have

a minimum vertical clearance per the latest edition of AASHTO, as

measured from the crown of the pavement to the lowest portion of

Issued 10/2014 18

an overhead obstacle located within the limits of the sidewalks on

each side of the street. The minimum vertical clearance shall be 10

feet for a bicycle path as measured form the crown of the path to

the lowest portion of the overhead obstacle located within 5 feet of

each edge of the bicycle path. Overhead traffic signals shall meet

the minimum vertical clearance specified in the MUTCD of latest

edition.

3-10.5 Lateral Clearance

Lateral clearance between the curb face and the closest part of any

fixed object not shielded by guardrail shall be a minimum of:

2 feet – Urban with low vehicle speed (under 30 mph),

10 feet – Other Urban (Vehicle speed between 30 and 40 mph),

and as per the TDOT Standard Roadway and Structure Drawings

manual of latest revision for vehicle speed above 40 mph.

Mailboxes and mailbox support structures constructed as a fixed

object will be exempt from this standard only along streets

classified as residential by the Zoning Regulations of Kingsport.

Fixed object mailboxes shall meet this standard when located on

all other street classifications.

Issued 10/2014 19

4. Traffic

4-1 Traffic Impact Study Requirements

4-1.1 Criteria for a Traffic Impact Study

To adequately assess the impacts of any development proposal on

the existing and planned transportation system, a Traffic Impact

Study will be required, given any of the following conditions:

A. Adjacent Roadway ADT:

A traffic impact study shall be required for any

development proposal for new development or

redevelopment of an existing site that is proposed to add

over 750 new trips to the existing roadway network.

B. Minimum Peak Hour Volume:

A traffic impact study shall be required if any development

proposal for new development or redevelopment of an

existing site will generate 100 or more added peak-

direction trips to or from the site during the adjacent

roadway’s peak hours or the development’s peak hour.

C. Previous Traffic Studies:

Any development proposal for new development or

redevelopment of an existing site with a previous traffic

impact study that is more than 1 year old will require an

updated traffic impact study.

D. Any new development which generates less than 750 trips

per day will still need to include the following on submitted

plans:

I. Intersection

a. Description of site including a location map

b. Type of project

1. If residential, number and type of

units

2. If commercial or office, include

square footage and occupancy

c. Site plan with access points shown to scale

II. Existing Conditions

a. Distance from nearest roadway intersection

in both directions

b. Distance to nearest drive or access points in

both directions

c. Location shown relative to opposing street,

driveways, or access Points

Issued 10/2014 20

III. Proposed Conditions

a. Width, radius, and markings of proposed

street, driveway, or access point

b. Proposed improvements adjacent to access

point including but not limited to

acceleration, deceleration lanes, and

pavement marking adjustments

4-1.2 Preliminary Traffic Impact Study

A preliminary traffic impact study may be required to evaluate the

traffic impacts of any development proposal required to undergo a

concept review. The preliminary traffic impact study shall include

the information required in Subsections 4-2.1 through 4-2.20 of

this document.

4-1.3 Responsibility for the Traffic Impact Study

The applicant for a proposed development will be responsible for

completing the Traffic Impact Study, with the City serving in a

review and approval capacity.

4-1.4 Preparation of the Traffic Impact Study

An Engineer with adequate experience and expertise in

transportation engineering shall prepare the Traffic Impact Study.

The Engineer shall certify the study by placing and validating his

professional seal on the report cover.

4-1.5 Coordination with the City

Transportation consultants and engineers preparing traffic studies

shall discuss proposed development projects with the Traffic

Engineering Division prior to initiating the study. Issues to be

discussed include, without limitation, the major thoroughfare plan,

the definition of the study area, relevant sub area plans, methods

for projecting build-out volumes, background traffic conditions,

trip generation, directional distribution of traffic, and trip

assignment. The Traffic Engineering Division, prior to study

preparation, shall approve these aspects of the Traffic Impact

Study.

Issued 10/2014 21

4-2. Traffic Impact Study Format

For development proposed to add more than 750 trips per day.

4-2.1 Study Requirements

The information provided in the Traffic Impact Study shall include

the following sections as outlined below. The study shall be typed

and bound, and clearly identify the data and information in the

appropriate sections. In addition, the study shall contain a table of

contents, lists of figures, and tables, and shall identify any map

pockets and included drawings.

4-2.2 Introduction

The Traffic Impact Study shall provide an introduction with an

overview and discussion of the project or development proposal.

4-2.3 Site Location and Zoning

Include a vicinity map detailing the property location, a conceptual

site plan reflecting the boundaries of the project or development,

and information detailing the designated zoning district, general

terrain and physical features of the site and the surrounding area.

4-2.4 Study Area Boundaries

Include the Study Area Boundaries as determined based on

discussions with the Traffic Engineering Division, and include all

roadways and transportation routes providing access to the site and

the surrounding transportation system.

4-2.5 Existing Area Street System Description

Describe and include roadway orientations, functional

classifications and geometries, intersection geometries, and traffic

controls, including without limitation signage and striping, speed

limits, parking restrictions, sight distances, transit routes, the

presence of bicycle and pedestrian facilities, and any other related

traffic operations information and improvements approved or

planned by government agencies. For identified improvements

scheduled by government agencies, include the nature of the

improvements, extent, implementation schedule, and the

responsible agency or funding source.

Issued 10/2014 22

4-2.6 Existing and Projected Roadway and Intersection Traffic Volumes

Include diagrams that map existing traffic volumes, and each

variation of projected traffic volumes, for all roadways and

intersections within the study area.

4-2.7 Existing and Proposed Site Uses

Include an identification of the existing land use and proposed land

use (or the highest potential land use) based on zoning and

maximum trip generation where a specific use has not been

determined. If rezoning is proposed, the study shall provide a

comparison between the highest trip generation uses for the

existing zoning and the highest trip generation uses for the

proposed zoning.

4-2.8 Existing and Proposed Land Uses in Vicinity of the Site

Document any vacant land or potential redevelopment that may

result in a change in traffic volume conditions within the study

area during each time period studied. Perform and provide trip

generation calculations on these parcels and include the trips

generated from these parcels in the trip volume diagrams and level

of service analyses for each appropriate time period studied.

4-2.9 Travel Demand Management Strategies

include an outline of travel demand management strategies to

mitigate traffic impacts created by proposed development and

measures for promoting alternate modes of travel, including but

not limited, to the following:

A. Walking, biking, and use of transit services to access a

proposed development, and

B. Include features that will increase convenience for using

alternate modes and that will reduce multiple trips to and

from the site, such as:

1. transit shelter and bench amenities,

2. connections to offsite pedestrian, bicycle, and

transit systems, and

3. vehicular, pedestrian, bicycle and transit

connections to adjacent vacant and developed

property.

Issued 10/2014 23

4-2.10 Trip Generation

Traffic estimates for the proposed project and potential developed

or redeveloped properties in the study area shall be obtained by

performing trip generation calculations using the procedures

outlined in the most current edition of the Institute of

Transportation Engineers’ (ITE) Trip Generation Manual. If

adequate Trip Generation Manual data is not available for a

specific land use, the procedures used to estimate trip generation

data shall be approved by the Traffic Engineering Division.

Include the following specific trip generation information:

A. Summary Table:

List each land use that requires trip generation analysis,

including the project plus developed or redeveloped land

uses within the study area. For each trip generation

summary include land use type, amount, density, average

trip generation rates for total daily traffic and peak hour

traffic (a.m., noon and/or p.m. peak hour traffic generation

may be required), and the resultant total trips generated for

each time period and each land use.

B. Calculations:

Calculation of projected trip generation for any land use,

used to determine study area impacts, shall be based on the

following:

1. Trip generation formulas (or rates, if formulas are

not available) published in the most recent version

of the Trip Generation Manual. Trip generation

reports from other industry publications may be

considered but are subject to the approval of the

Traffic Engineering Division.

2. A local trip generation study, if no published rates

are available and similar land uses can be studied,

provided that the local trip generation study follows

procedures outlined in the most recent version of

the Trip Generation Manual.

3. Additional data or studies from other similar

jurisdictions. Trip generation numbers obtained in

this fashion are subject to the review and approval

of the Traffic Engineering Division.

4-2.11 Trip Generation Reductions

Credit for any trip reductions is subject to review and approval in

advance by the Traffic Engineering Division. Anticipated trip

reduction assumptions should be discussed and approved by the

Traffic Engineering Division prior to the preparation of the Traffic

Issued 10/2014 24

Impact Study. Trip reductions typically fall into one of two

categories: those that reassign some portion of the trip generation

from the surrounding roadway network (passerby and diverted trip

reductions), and those that remove trips generated from the land

use trip generation (internal and modal split reductions).

A. Use of passerby and diverted trip reductions may be

evaluated and considered in reducing the additional

estimated total trip generation of a new land use. However,

passerby and diverted trip reduction factors are not to be

applied directly to reduce trip generation and turning

movement volumes at driveways serving the studied land

use. These factors are subject to the approval of the Traffic

Engineering Division.

B. Internal trip reductions and modal split assumptions may

reduce the total trip generation of a land use. These factors

considered in the Traffic Impact Study shall supply

analytical support and detailed documentation to

demonstrate how the estimates were derived and

incorporated, and are subject to the approval of the Traffic

Engineering Division.

4-2.12 Trip Distribution / Assignment and Modal Split

Trip distribution / assignment of generated traffic estimates shall

be clearly summarized and illustrated for each access route

entering and exiting the generating land use, using the study area

transportation system as a basis. Include the following specific trip

distribution / assignment information:

A. Trip Distribution:

The trip distribution for each site shall be identified and

illustrated with a graphical figure detailing the percentages

of vehicles making each movement, at each intersection in

the study area. The trip distribution shall be logically based

upon factors such as existing traffic volume data in the

study area, market analyses, applied census data, and/or

professional engineering judgment. Trip distribution

assumptions are subject to the approval of the Traffic

Engineering Division.

B. Trip Assignment:

Trip assignment shall be done by applying the trip

generation totals for each time period studied to the trip

distribution percentages developed. The trip assignment

shall develop anticipated traffic volumes for each of the

movements identified by the trip distribution and each of

Issued 10/2014 25

the time periods identified in the analyses. The resulting

traffic volumes shall be illustrated with graphical figures

detailing the anticipated volumes making each movement,

at each intersection in the study area, during each time

period studied.

4-2.13 Existing and Projected Traffic Volumes

A. Traffic Volume Scenarios:

Five traffic volume scenarios and three separate times of

the day may be required and included in a traffic impact

study analysis. Prior to the development of the Traffic

Impact Study, the applicant shall meet with the Traffic

Engineering Division to determine the scenarios and time

periods to be studied. The number of scenarios and time

periods to be studied is subject to the approval of the

Traffic Engineering Division. The potential scenarios and

time periods include the following:

1. Scenario 1 - Existing Conditions:

An analysis of existing traffic conditions will be

required in the Traffic Impact Study. Existing

Conditions analysis should attempt to model traffic

conditions at the time the Traffic Impact Study is

being prepared. Traffic counts that are older than

the year the study is being prepared shall be

factored up or adjusted to existing year volumes.

2. Scenario 2 – Anticipated Project Completion Year

Without Project Volumes:

Include an analysis of the anticipated traffic

conditions during the year the project is intended to

be finished and traffic is generated. The analysis

shall anticipate the increase in background traffic

volumes and the generation of other related projects

that are not present in the existing condition, but

would likely be completed and generating trips in

this time period. The trip generation for the

proposed project shall not be included in this

scenario. If the project is intended to be completed

the same year that the Traffic Impact Study is being

prepared, then this scenario is the same as Scenario

- Existing Conditions.

3. Scenario 3 - Anticipated Project Completion Year

With Project Volumes:

This scenario is the same as Scenario 2, except that

the project volumes are assigned to the roadway

Issued 10/2014 26

network and included in the analyses.

4. Scenario 4 - Future Build-out Conditions Without

Project Volumes:

An analysis of the anticipated traffic conditions

during build-out, using a projected build-out year

approved by the Engineering and Traffic Divisions.

The analysis shall anticipate the increase in

background traffic volumes and the generation of

other related projects that are not present in the

existing condition, but would likely be completed

and generating trips in this time period. The trip

generation for the proposed project should not be

included in this scenario.

5. Scenario 5 - Future Build-out Conditions With

Project Volumes:

This scenario is the same as Scenario 4, except that

the project volumes are assigned to the roadway

network and included in the analyses.

B. Traffic Volume Projections:

The traffic volume projections shall identify existing and

projected daily traffic counts and peak hour turning

movement counts for each access point, intersection and

street identified in the traffic impact study area for each of

the aforementioned scenarios required in the study.

C. Time Periods:

Each scenario may be required to look at three different

time periods (the a.m., noon and p.m. peak hour

conditions). The Traffic Engineering Division will

determine which time periods and scenarios are required

for each Traffic Impact Study depending upon the project's

size, location, types of land use and other pertinent factors.

D. Raw Traffic Count Data:

Include all raw traffic-count data for average daily and

peak hour conditions and traffic analysis worksheets in the

appendices of the Traffic Impact Study for reference.

Computer techniques and associated printouts may be used

for this part of the report.

NOTE: All total daily traffic counts must be actual machine

counts, not based on factored peak hour sampling. Latest available

machine counts from the City, and other agencies, may be

Issued 10/2014 27

acceptable if not more than 2 years older than the year the Traffic

Impact Study is being prepared. Data older than the year the

Traffic Impact Study is being prepared shall be factored up to

current year numbers, using growth rates approved by the Traffic

Engineering Division.

4-2.14 Level of Service Analysis

A. The Traffic Impact Study shall provide LOS analyses for

all study area intersections (signalized and unsignalized)

using methodologies outlined in the current Highway

Capacity Manual. The analyses should be performed for

Scenarios 1 through 5, described in Section 4-2.13,

"Existing and Projected Traffic Volumes," and for each

time period (a.m., noon and/or p.m. peaks) that is required

in the Traffic Impact Study, unless otherwise required by

the Traffic Engineering Division.

B. Level of service analyses shall consider the appropriate

infrastructure, lane usage, traffic control and any other

pertinent factors for each scenario to be studied.

Intersection improvements, planned by the City in the study

area, are eligible for inclusion in the level of service

analyses. The Engineer will verify if the Traffic

Engineering Division want planned improvements

included.

C. Signalized intersection level of service analyses shall use

the existing timing and phasing of the intersections for all

scenarios. If the analyses are to deviate from existing

timings or phasing, then a detailed signal progression

analysis for the affected corridor may be required.

D. The results of the level of service analysis for each scenario

and each time period shall be summarized into one or more

tables, which illustrate the differences in level of service for

each scenario. At a minimum, these tables shall list the

level of service results for each intersection to include the

level of service for each approach and the total intersection

level of service, as well as the corresponding delay values

for each approach and the total intersection. These tables

shall highlight any locations where the addition of project

traffic has caused any approach of any intersection to fall

below LOS C.

Issued 10/2014 28

4-2.15 Traffic Counts and Analyses Worksheets

Provide capacity analyses calculations based on the planning or

operational analysis techniques contained in the current Highway

Capacity Manual or subsequent highway capacity techniques

established by the Federal Highway Administration, including the

following:

A. Raw Traffic Count Data:

Include all raw traffic count data and traffic analyses

worksheets in the appendices of the Traffic Impact Study

for reference. Computer techniques and associated

printouts may be used for this part of the report.

B. Level of Service Analyses:

Include all level of service analyses performed for

intersections. If signal timing or phasing changes are

proposed for traffic mitigation and the signal is currently

part of a coordinated system, a progression analysis will be

required to ensure that adequate progression is maintained

or provided. All progression analysis and assumptions to be

used shall be reviewed and approved by the Traffic

Engineering Division.

4-2.16 Traffic Control and Signals

The Traffic Impact Study shall discuss and analyze any traffic

control measures that may be necessary to serve a proposed project

or development. Any traffic control measures are to be evaluated

based on the requirements established in the Manual on Uniform

Traffic Control Devices, (MUTCD) and by the City or TDOT, and

will be applied as necessary to ensure safe and efficient operation

of the City's transportation system. The analysis shall demonstrate

the need for traffic control measures, considering alternative site

designs in order to minimize or mitigate traffic impacts from the

proposed project or development. The following traffic control

measures are to be addressed:

A. Regulatory Signage, Markings and Islands:

Regulatory signage, markings and islands shall be applied

as necessary in conformance with the MUTCD and City

standards and policies.

B. Traffic Signals:

The need for new traffic signals will be based on warrants

contained in the MUTCD and on City policies. In

determining the location of a new signal, safety and

community traffic circulation and progression will be the

Issued 10/2014 29

primary considerations. If a traffic signal is suggested as

part of a mitigation package, and the intersection lies within

a series of coordinated traffic signals, then a progression

analysis may be required to ensure that adequate

progression may still be provided. Generally, a spacing of

one-half mile between all signalized intersections is to be

maintained, to achieve optimum capacity and signal

progression. Pedestrian movements shall be considered in

all cases and adequate pedestrian clearance is to be

provided in the signalization design.

C. Intersection and Access Locations:

When signalization is proposed, to provide flexibility and

safety for the existing roadway system and to ensure

optimum two-way signal progression, an approved traffic

engineering analysis shall be made to properly position all

proposed intersections and development access points.

4-2.17 Traffic Accidents

The Traffic Impact Study may need to include accident analyses at

one or more locations in the study area. The Engineer will verify if

the Traffic Engineering Division want an accident analysis

included in the Traffic Impact Study. When an accident analysis is

required, estimates of increased or decreased accident potential

shall be evaluated for the proposed project or development and

appropriate safety-related mitigation measures are to be included.

Traffic accident data is available from the Traffic Engineering

Division of the City of Kingsport Public Works Division.

4-2.18 Recommendations

The Traffic Impact Study shall include a section in the report that

provides any recommendations of the Engineer. These

recommendations shall include the Engineer's recommended

location, nature and extent of proposed transportation

improvements associated with the project or development to ensure

safe and efficient roadway operations and capacity.

A. These recommendations are to be supported with

appropriate documentation and discussion of the technical

analyses, assumptions and evaluations used to make the

determinations and findings applied in the Traffic Impact

Study. In the event that any traffic impact study analyses or

recommendations indicate unsatisfactory levels of service

on any study area roadways, a further description of

proposed improvements or mitigation measures to remedy

deficiencies shall be included.

Issued 10/2014 30

B. These proposed improvements or mitigation measures may

include projects by the City or The Tennessee Division of

Transportation for which funds have been appropriated and

obligated. These proposals may also include improvements

to be funded and constructed by the applicant as a part of

project or development construction. Assumptions

regarding future roads, widths and lane usage in any

analyses are subject to the approval of the Traffic

Engineering Division.

C. In general, the recommendation section shall include:

1. Proposed and Recommended Improvements:

Provide a detailed description and sketch of all

proposed and recommended improvements. Include

basic design details showing the length, width and

other pertinent geometric features of any proposed

improvements. Discuss whether these

improvements are necessary because of

development traffic or whether they would be

necessary due to background traffic. Specify the

approximate timing necessary for each

improvement.

2. Level of Service Analysis at Critical Points:

Provide another iteration of the LOS analyses that

demonstrates the anticipated results of making

recommended improvements, such as movement

LOS, and operational and safety conditions. In

association with LOS analyses for recommended

improvements, include a comparison of these

results with the background LOS analyses without

the proposed project or development. Where

appropriate, this step is to be provided for both near

term (year of project completion) and built-out

scenarios.

4-2.19 Conclusion

Include a conclusion in the report that provides a clear and concise

description of the study findings and recommendations, and serves

as an executive summary.

4-2.20 Revisions to the Traffic Impact Study

A. Following City review, the Traffic Engineering Division

may require revisions to a traffic impact study based on the

Issued 10/2014 31

following considerations:

1. Completeness of the study;

2. Thoroughness of the level of service and impact

analyses and evaluations;

3. Compatibility of the study with the proposed access

design, project or development plan, and local

transportation system;

4. Compliance with local and state regulations and

design standards, and;

5. An analysis of study deficiencies, errors, or

conflicts.

B. Revisions may also be required as a result of the public

process with surrounding neighborhoods and land uses, or

review by BMA or the Kingsport Regional Planning

Commission. Additional details requiring traffic impact

study revisions may include but are not limited to, the

following:

1. An enlarged study area,

2. Alternative trip generation scenarios,

3. Additional level of service analyses, and

4. Site planning and design issues.

4-3 Site Access

4-3.1 General

The efficiency and safety of a street, road, or highway is greatly

affected by vehicles entering, leaving, or crossing the roadway.

Commercial and multi-family residential developments are major

contributors to increased volume of traffic upon municipal streets,

roads, and highways. Such developments also give rise to

increased traffic volume of a type and pattern characterized by

frequent ingress and egress to the same. Therefore, such

development significantly affects the efficiency and safety of

streets, roads, or highways within the municipality. In the interests

of safety, the city must regulate access to the streets, roads, and

highways within its city limits in a uniform manner that is fair to

the general public, land-owners, and developers. All regulations

shall be upheld unless good engineering judgment indicates

otherwise. This will be determined by the Traffic Manager or

designee.

A. Demolition permits:

Issued 10/2014 32

When a demolition permit is issued for the removal of a

building, the point of ingress and egress to serve the new

use must comply with the standards set forth in this article.

Any driveway or part thereof rendered useless by

demolition, remodeling or renovation not in compliance

must be removed, at the expense of the developer, and the

curbing, parkway, sidewalks, etc., replaced to meeting

existing city specifications.

B. Removal or Modification:

The City of Kingsport requires that when the use of any

parcel is changed making any or all of the existing

driveways unnecessary or non-conforming, the owners of

the property shall at the owner’s expense remove the

driveway and replace all necessary curbs, gutters, sidewalk,

and other features within the border area to a condition

consistent with the neighborhood and/or the border areas of

the adjacent properties. The required changes shall be

made concurrent with other improvements to or on the site

or, if none, within 6 months following such change in use.

4-3.2 Access to City Right-of-Way

When connecting a development to a City Street, a permit is

required for the following cases;

A. When a Building or Grading Permit is Required:

If a Building or Grading Permit is required, then a

driveway permit is also required for any access being

proposed. Access associated with a site plan must be

reviewed to determine if it complies with City Code and the

requirements of this document before the building or

grading permit process is complete.

B. Existing access to Vacant Property Proposed for

Development:

Existing access to vacant property being proposed for

development must be reviewed to determine if the existing

access design meets the minimum standards established by

City Code and this document.

C. Existing access to Developed Property Proposed for an

Upgrade:

When an upgrading, such as remodeling of an existing

development is proposed, the existing access design must

be upgraded to meet the minimum standards established by

City Code and this document.

Issued 10/2014 33

D. New Access for Development Proposed for Construction or

Reconstruction:

Development proposed for construction or reconstruction

and planning new access to City streets and alleys require a

permit, as set forth in Section 90-248, of the City of

Kingsport Code.

All driveway permits shall be in strict accordance to Section 90-

248, of the City of Kingsport Code.

Permit may be revoked if work does not conform to specifications

established by this document.

4-3.3 Access Permit Required on State Right-of-Way

Accesses and curb-cuts proposed for construction or reconstruction

on state routes require a permit from the Tennessee Division of

Transportation. The TDOT permit is issued from Knoxville,

Tennessee. When a TDOT access permit is required, it will

additionally act as the City access permit, and all requirements of

Section 4-3.2 shall apply.

Prior to sending any application to TDOT, a site plan of the

proposed development shall be submitted to the Traffic Division of

the Public Works Division for review. The site plan shall indicate

the proposed access point or points, the type of construction, the

width of the driveway, and meet the plan requirements.

Additions or deletions to the design may be requested. When the

review comments have been addressed in accordance with the

requirements of the Traffic Engineering Staff an approval stamp

will be placed on 6 copies of the site plan and 2 copies of the

grading plan. The Traffic Division will retain one copy of each to

keep on file.

Kingsport Traffic staff will provide necessary documentation and

the 5 city-approved site plan copies to the developer, and he or she

will be responsible for a contacting TDOT Region One in

Knoxville for any bond monies required for work in ROW. The

TDOT Region One Traffic Engineer will review the application

and site plan, and when all TDOT review requirements have been

met by the applicant, the TDOT Region One Traffic Engineer will

give approval. TDOT will send a copy of the approved permit to

both the applicant and the City Traffic Engineer.

Issued 10/2014 34

4-3.4 Number of Driveways Permitted

In order to minimize interference to traffic flow on the public

streets, the number of driveways will be limited to those needed to

provide adequate ingress and egress to private property. The

number permitted will be determined based on the type of

development, the functional classification of the street, and the

length of frontage the property has on a given street.

Single Family Residential Driveways Allowed – based on available street frontage

Street Classification

1 Driveway Allowed

2 Driveways Allowed

Arterial Streets

<200’

> 200’

Collector Streets

<125’

> 125’

Local Streets

<75’

> 75’

Residential Streets and Lanes

<50’

> 50’

More than 2 driveways will not be allowed for single family residential properties unless otherwise determined by

the City of Kingsport Traffic Division.

All other uses Driveways Allowed – based on available street frontage

Street Classification

1 Driveway

Allowed

2 Driveways

Allowed

Additional Driveways

Arterial Streets

<200’

200’ – 400’

1 additional for every 400’ over 400’

Collector Streets

<200’

200’ – 400’

1 additional for every 200’ over 400’

Local Streets

<100’

100’ – 200’

1 additional for every 200’ over 200’

Residential Streets and

Lanes

<100’

> 100’

No more than 2 Driveways Allowed

Only allowed based on need demonstrated in a traffic impact study or otherwise determined by the City

of Kingsport Traffic Division.

For the purpose of this section, shopping centers, planned

developments or developments where there is a series of attached

buildings, and associated out-parcels, or developments that are

served by a common parking area are considered as one lot.

For the purpose of calculating the number of driveway accesses

allowed, where there are one-way traffic movements, one entrance

and one exit are considered one driveway access.

Where a lot has more than one street providing access, the

secondary street frontages are not automatically entitled to

additional driveway accesses. However, if all of the other

requirements in this policy can be met, additional driveway

accesses could be allowed. Generally, the primary access to a lot

will be required to be located on the roadway that has the lower

classification or, if the same classification, the lower volume

roadway.

A. Interconnection of On-Site Circulation Required:

In addition to the primary access, developments having off-

street parking facilities shall provide on-site vehicular

circulation allowing access to all portions of the site without

Issued 10/2014 35

using the adjacent street system, and shall interconnect on-site

vehicular circulation with adjoining development or vacant

property. Additionally, pedestrian access shall interconnect

with adjoining development or vacant property.

B. Joint Access

The City will facilitate use of joint-access driveways serving two

or more adjoining parcels. Where joint-access driveways are

feasible the Traffic Engineering Division may require:

A. Owners of parcels using the joint-access driveway to share

the cost of construction or reconstruction of the driveway;

B. Owners of parcels using the joint-access driveway to share

the cost of traffic signals at the driveway; and,

C. Locate or relocate the joint-access driveway to

conveniently serve all parcels using it.

D. Signed documentation for both properties involved.

4-3.6 Prohibited Locations of Access

A. Residential Access Prohibited Near Intersections:

No residential driveway approach, including curb

transitions, shall be permitted within 25 feet of the edge of

a cross street or within 5 feet of the point of curb radius at

the cross street, whichever is greater on residential/local

roadways, 50 feet of the cross street on collector roadways

and 100 feet of the cross street for arterial roadways.

B. Commercial Access and Private Roadways Prohibited Near

Intersections:

No commercial driveway or private roadway approach

including the curb transitions shall be permitted within 75

feet of the edge of a cross street or within 10 feet of the

point of curb radius at the cross street, whichever is greater,

100 feet for collector roadways and 150 feet for arterial

roadways.

C. Locations with Insufficient Sight Distance Prohibited:

Driveways shall not be permitted at locations hidden from

the user of the public street,

1. Where possible, access will not be located where

intersection sight distance cannot be provided as

specified in the American Association of State

Highway and Transportation Officials’, A Policy on

Geometric Design of Highways and Streets, latest

version (The Green Book).

Issued 10/2014 36

2. Access will only be granted if the recommended

sight distance outlined in the above mentioned

design book are met based on current roadway

speed limit. The sight distance will be measured

from a point offset 14.5 feet from the cross traffic

and at an eye height of 3.5 feet, while sighting a

target height of 3.5 feet.

D. Locations Requiring Backing Into the Street Prohibited:

With the exception of one and two family dwellings, access

will not be permitted in locations that would require or

encourage vehicles to exit a driveway or parking lot by

backing into the public right-of-way or roadway.

E. Locations Conflicting with Public Facilities or Utilities

Prohibited:

No driveway approach shall be permitted to encompass any

city or other public utility within a minimum of 5 feet. The

applicant may be authorized to relocate any such utility

upon application to the subject utility provider and upon

making suitable arrangements for financial reimbursements

to such provider.

F. Locations Adjacent to Property Lines:

1. Single and Two Family Residential Driveway:

No single or two family driveway approach,

excluding curb transitions and radii, shall be located

within 5 feet of a property line.

2. Multifamily and Commercial Driveway:

No multifamily or commercial driveway, excluding

curb transitions and radii, shall be located within 15

feet of a property line.

4-3.7 Access Width

A. Single and Two family Residential Access:

The minimum width for residential driveways shall be 10

feet for single driveways with a maximum of 24 feet (30

feet maximum for shared, joint use driveways) not

including the curb transitions and radii.

B. Multi-family and Commercial Access:

The minimum width for commercial driveways shall be 24

feet and a maximum of 40 feet not including curb

Issued 10/2014 37

transitions or curb radii.

C. Industrial Access:

The minimum width for Industrial driveways shall be 24

feet and a maximum of 50 feet not including curb

transitions or curb radii.

D. Radius of Driveway Access:

The radius of a non-residential driveway access shall be no

less than 15 feet and no more than 50 feet. The radius of a

residential driveway shall be a minimum of 5 feet.

E. One Way Access:

The minimum for one way access shall be 12 feet and a

maximum of 16 feet. Access shall be signed per MUTCD

for the one way access.

4-3.8 Access Spacing

When measuring distances to or between driveways, distance shall

be measured from the edge-of-throat to edge-of-throat.

A. Driveways on individual lots providing access to residential

streets shall be spaced a minimum of 25 feet apart,

B. Driveways providing access to non-residential local and

collector streets shall be spaced a minimum of 50 feet

apart,

C. Driveways providing access to minor arterial collector

streets shall be spaced a minimum of 125 feet apart,

D. Driveways providing access to principal arterial streets

shall be spaced a minimum of 300 feet apart.

However, the Traffic Engineering Division may approve a design

that will result in different spacing when all of the following

factors are present:

1. The parcel does not have adequate frontage on the

street to provide the spacing shown above.

2. For multifamily and commercial applications, after

good faith attempts, the owner of the parcel is

unable to secure joint access through an adjoining

parcel,

Issued 10/2014 38

3. The parcel to be served cannot be served from

another street, and

4. The resultant driveway provides maximum spacing

from adjacent driveways giving access to the street,

and proper corner clearance is provided. For the

following street classifications, the following

requirements specify the minimum allowed

distances between driveways for Multi-family and

commercial access:

Street Classification

Distance between Driveways

Arterial Streets

300 feet

Collector Streets

200 feet

Local Streets

150 feet

Residential Streets and Lanes

50 feet

The City may require joint permanent access easements to

minimize the number of driveways along a roadway. Joint

permanent access easements shall maintain access control for a

minimum length of 40 feet perpendicular from the right-of-way or

as determined by a traffic impact study. Single Family Residential

properties are exempt from the above local street requirement for

the distance between driveways.

4-3.9 Access Alignment and Minimum Length

Horizontal approach angles between the centerline of the driveway

and the centerline of the public street shall no more than 30

degrees off perpendicular for one way or two way operation.

Access to developments on opposite sides of a collector or arterial,

where turning movements are not controlled by a center median or

access island, shall either be aligned or offset by at least 125 feet

on residential, local roadways or lanes, 200 feet for collector

roadways and at least 300 feet on arterials. Greater offsets may be

required if left-turn storage lanes are required.

All driveways must extend to the back of the Right of Way or 20

feet into the property from the line of the abutting street before the

edge of the driveway may be intersected by a parking space, aisle

or drive.

4-3.10 Access Restrictions

Along non-residential, collector and arterial streets, or where

necessary for the safe and efficient movement of traffic, the City

will require access points that limit turning movements, as follows:

Issued 10/2014 39

A. Access Islands:

Where restricted turning movements are required by the

City, and where the abutting street does not have a median,

an access island will be required. Islands shall have a

minimum area of 150 square feet, be bounded by vertical

curb.

B. Access Island Lanes:

Access island lanes shall be at least 12 feet wide, have a

radius of at least 20 feet, and be designed to accommodate

the largest vehicle using the access on a daily basis. The

island shall provide congruent curb ramps or cut through

for sidewalks. The minimum width of the island along the

abutting roadway frontage shall be 30 feet for right-in, and

right-out-only islands, and 15 feet for islands allowing

right-in, right-out and left-turn movements.

C. Access With Median Dividers:

Median dividers may be permitted where a median design

can improve traffic circulation, safety or overall site access.

Where permitted, medians shall be at least 4 feet wide and

extend at least 25 feet beyond the right-of-way.

4-3.11 Traffic Control

All accesses shall be designed and constructed with appropriate

traffic control and signage conforming to the MUTCD, and these

standards.

4-3.12 One-Way Access Lanes

One-way access lanes may be permitted where restricted access is

limited to one turning movement, or where the one-way access

improves traffic circulation and safety. One-way access lanes shall

be at least 12 feet wide, have a radius of at least 20 feet, and be

designed to accommodate the largest vehicle using the access on a

daily basis.

4-3.13 Speed Change Lanes

Speed change lanes may be required on collectors and arterials to

lessen the proposed access’s impact on the public street level of

service.

A. Acceleration Lane:

Acceleration lanes may be required when it is critical not to

interrupt the traffic speed on the public street, or if an

access is located near an adjacent deceleration lane for a

separate access and joining the two lanes will provide a

Issued 10/2014 40

safe speed change area for both access locations.

B. Deceleration Lane:

A Deceleration lane may be required in conjunction with

new or improved accesses on all collector and arterial

streets.

The minimum width of a deceleration lane shall be 11 feet,

and the minimum storage lane length shall be 75 feet.

The taper shall be a minimum of 75 feet long for collectors

or arterials with posted speeds that are less than or equal to

45 mph.

When posted speed exceeds 45 mph, the taper shall be

designed in accordance with the taper length equation given

in the MUTCD, Part 6, Traffic Controls for Street and

Highway Construction, Maintenance, Utility and

Emergency Operations. Small dimensional deviations may

be allowed for the deceleration lane when:

1. property limitations are preexisting and not the

creation of the applicant,

2. if interference occurs with access locations for

existing development not owned by the applicant

and combination of access is impractical, or

3. if major drainage or utility structures would block

deceleration lane construction.

C. Additional Lanes:

For collector, and arterial streets, additional through lanes

and turn lanes may be required at the expense of the

applicant / developer:

1. if the lanes are found to be needed by the Traffic

Impact Study, or

2. when a development is not required to do a full

traffic impact study as outlined in Section 4-1 and

4-2 of these standards, and the City requires a

scaled-down study, the addition of lanes shall be

required if existing or 20 year projected traffic

volumes are in excess of 3,000 ADT and turning

movements are projected to exceed 5% of the

through traffic ADT at full build-out.

D. Vehicle Storage:

Adequate driveway storage capacity for both inbound and

outbound vehicles to facilitate safe, unobstructed, and

Issued 10/2014 41

efficient traffic circulation and movements from the

adjacent roadway and within the development shall be

provided, except for single-family or duplex residential

driveways on local streets. Adequate driveway length will

be subject to approval by the Traffic Engineering Division

and shall extend at least 20 feet beyond the right-of-way

before accessing the first off-street parking space or

parking lot aisle.

4-3.14 Construction Details

The construction details for access through curb and sidewalk, and

for cases where no curb exists, are shown in the Construction

specifications.

4-4 Traffic Control Devices

4-4.1 Traffic Signs and Pavement Markings

The applicant for construction approval shall be responsible for the

installation of all traffic control devices and markings prior to the

opening of roadways, bike paths, etc.

A. Signing and Striping Plan:

A complete signing and striping plan shall be submitted as

part of project or development construction plans, to be

approved by the Traffic Engineering Division prior to

installation. The plan shall specify the various types and

combinations of approved signs, pavement markings, and

barricades required for each project or development.

B. Conformance with MUTCD:

All signs, sign materials, and barricade warning lights shall

conform to the standards set forth in the Manual on

Uniform Traffic Control Devices, (current edition), and

these Standards.

C. Materials:

The quality and type of material used in traffic signs, all

vandal-proof sign hardware, and all metal u-channel sign

posts shall be in conformance with these Standards.

4-4.2 Traffic Signals

The applicant for construction approval shall be responsible for the

installation of all traffic signal devices and related equipment prior

to the opening of roadways.

A. Traffic Signal Plan:

Issued 10/2014 42

A complete traffic signal plan shall be submitted as part of

project or development construction plans, to be approved

by the Traffic Engineering Division prior to installation.

The plan shall specify the various types of equipment

involved in a traffic signal installation, and it shall show the

location of the traffic signal poles and traffic signal heads

in relation to the intersection layout. The plan shall indicate

the location of sensor loops and other detection and

preemption equipment. The design shall meet the minimum

requirements established by the MUTCD, TDOT, and the

City of Kingsport Traffic Engineering Division

B. Conformance with MUTCD:

All traffic signal layouts and equipment shall conform to

the standards set forth in the Manual on Uniform Traffic

Control Devices (current edition) , TDOT specifications

and any other specifications set forth by the Traffic

Engineering Division and these Standards.

C. Materials:

The quality of material used in traffic signals, type and

quality of all controller equipment, traffic signal poles,

traffic signal heads, electric wiring and conduit, and all

related items shall meet the minimum specifications of

TDOT and the Traffic Engineering Division.

4-5 Street Lighting

4-5.1 Subdivisions

The City of Kingsport will be responsible for lighting all roadways

for subdivisions that utilize overhead power; this will include

wooden poles and cobra head fixtures.

The property owner/developer will be responsible for all upfront

costs for underground decorative street lights in their development.

The City of Kingsport will coordinate with developer and

appropriate power provider for the development design. Each

power provider has different costs associated with underground

lighting.

Issued 10/2014 43

4-6 Construction Zone Traffic Control

4-6.1 Plan Required

Any construction activity which will impact the traveling public of

Kingsport shall prepare a traffic control plan for the warning and

detouring of traffic within the construction zone. The plan shall be

included in the construction plans, and must receive approval from

the Traffic Engineering Division prior to commencement of any

construction activity.

4-6.2 Conformance with MUTCD

The plan shall meet the minimum standards established in the

MUTCD, TDOT and City of Kingsport specifications.

4-6.3 Responsibility for Design

The owner’s Engineer shall be responsible for the design of the

Construction Zone Traffic Plan. The Engineer shall be trained in

the design of construction zone traffic plans and shall certify the

plan by placing and validating his seal on the Construction Zone

Traffic Control Plan. The Traffic Engineering Division shall

review the plan for compliance with minimum standards.

Issued 10/2014 44

5. Excavation and Pipe Trenches

5-1 Side Slopes, Embankments, and Utility Trenching

The maximum cut and fill slope permitted shall be 50% or two horizontal

units to one vertical unit (2:1). Any terrain with a slope greater than 2:1

shall be designed by a professional engineer and approved by the City

Engineer. The City Engineer withholds the right to require a geotechnical

report for any slope that could endanger the welfare of the general public.

Fill embankments shall be formed of suitable material placed in successive

layers not to exceed more than 8 inches in depth for the full width of the

roadway cross-section, and 12 inches in the slope and embankment area.

No stumps, trees, brush, rubbish or other unsuitable materials or

substances shall be placed in the embankment. Each successive layer shall

be thoroughly compacted by a sheepsfoot tamping roller, 10-ton minimum

power roller, pneumatic-tired roller, or other standard method approved by

the City Engineer.

Spreading and compacting of material shall be performed in accordance

with the pertinent section of the Tennessee Division of Transportation

Standard Specifications for Road and Bridge Construction, of latest issue.

The Contractor shall be responsible for having a registered Geotechnical

Engineer provide appropriate compaction testing of the excavation.

Compaction testing shall be taken at a frequency determined by the

Geotechnical Engineer, but the City Engineer reserves the right to require

tests to be taken in questionable areas. The Geotechnical Engineer shall

provide the City with compaction testing results and certify that all

excavations were constructed per TDOT and City of Kingsport

requirements. The Geotechnical Engineer shall be a licensed engineer and

place his seal and signature on the certification. The certification shall be

received by the City Engineer prior to construction of any pavement

sections, curbs, gutters or other structures on the excavations.

5-2 Excavation Near Utilities

Contractor shall not fill over existing utilities (water, wastewater, or

stormwater) unless approved in writing by the City Engineer. The

contractor shall not excavate near or uncover existing utilities without

prior approval by the City Engineer and review by the appropriate utility.

Issued 10/2014 45

6. Water Distribution

6-1 General

All proposed and authorized new extensions or modifications

to the Water Distribution System shall conform to these Water System

Design Standards and City Standard Operating Procedures and be

constructed in accordance with TDEC and the City of Kingsport

Construction Specifications.

Under no circumstances shall a contractor operate any parts of the Water

Distribution System without approval from the Water/Wastewater

Division. This includes all valves, hydrants, pumps, etc. Such operation

will result in the dismissal of the contractor from the project.

6-2 Engineering Plans and Approval

All new extensions or modifications to the Water Distribution System,

shall be provided on engineering plans conforming to these standards,

sealed by a Registered Professional Engineer, and approved by the

Engineering Division or TDEC. Hydraulic calculations shall accompany

the plans.

Design shall further conform to all other applicable federal, state, and

local laws and regulations, and all required permits shall be obtained prior

to construction.

Engineering plans shall clearly show and label the proposed water line

extension, all fittings and appurtenances, and service lines and water meter

locations to be installed; existing and/or proposed roads and road right-of-

way; water line easements; lot lines; lot numbers; proposed location of all

new underground utilities within the same right-of-way as the proposed

water system improvements; topographic information or profile view to

include proposed final depth of bury of water mains and facilities; north

arrow; location map; applicable and current City of Kingsport construction

details; and any other information necessary for the appropriate and

accurate construction of the proposed water system extension or

modification.

6-3 Right-of-Way and Access

All water distribution system extensions or modifications (including

meters) to be owned and maintained by the City of Kingsport shall be

within a publicly-owned and maintained street right-of-way or easement

with sufficient access from public right-of-way. Whenever practical, water

mains shall be located outside of paved or otherwise improved surfaces

and shall maintain a horizontal separation of at least 3 feet from other

utilities with the exception of sewer which shall have a horizontal

separation of 10 feet. The right-of-way and/or easement shall be dedicated

to the City of Kingsport.

Issued 10/2014 46

6-4 Pre-Construction Meeting and Notice to Proceed

No construction of extensions or modifications shall begin before plans

are approved for construction and Authorization to Construct Permit is

granted by the Engineering Division through a Pre-Construction Meeting

coordinated by the Engineering Division. Any construction done prior to

this Notice may be summarily rejected or refused without further

investigation. In addition, beginning construction without authorization

violates State regulations and subjects the offender to State enforcement

actions.

6-5 Contractor License Requirement

All contractors and subcontractors performing any construction on water

distribution system extensions or modifications, except Personnel of the

Water Division, shall be licensed Utility Contractors by the State of

Tennessee. The developer shall provide the Engineering Division with the

names and license number of each contractor or subcontractor before each

begins construction on the water system.

6-6 Accessibility During Construction

The construction site shall be accessible at all times from the Notice to

Proceed for inspection of progress by the Engineering or

Water/Wastewater Division. Failure to provide accessibility may result in

rejection of the work.

6-7 Connections to Existing Water System

6-7.1 Refer to City of Kingsport Construction Specifications for

appropriate detail drawings for use in plans. Temporary backflow

devices shall be required on all taps to existing water lines.

6-7.2 All connections to or modifications of existing water mains shall

be performed using the current Standard Operating Procedures of

the Water/Wastewater Division. These procedures will be made

available upon request.

6-7.3 The Contractor shall provide a minimum of 72 hours advance

notice to the Water/Wastewater Division for water interruption for

a tie-in, and the Contractor is strongly encouraged to provide

additional notice when possible. All requests, except emergency

repairs, of less than 72 hours will be denied.

6-7.4 All new service connections installed on water main extensions

shall be tapped on the new water main before the water main is

Issued 10/2014 47

hydrostatically tested and disinfected, and the service connections

shall be disinfected to the meter cut-off valve as the water main is

being disinfected. If a contractor taps a water main for any purpose

in violation of these standards after the disinfection test but before

the Letter of Acceptance, the disinfection test shall become invalid

and will be required to be repeated.

6-8 Water Mains

6-8.1 Size

The size of water mains shall be justified by hydraulic analysis.

The standard size water main shall be 8 inches in diameter, except

smaller water mains may be established under the following

conditions:

A. A water main may be 6 inches in diameter within local

areas of distribution where the extent of present and future

service demand can be fully defined and adequate residual

water pressure can be maintained throughout as required by

the TDEC and the Water/Wastewater Division. Predicted

residual pressure shall be confirmed through engineering

hydraulic calculations, for both peak domestic flow

conditions and a maximum fire flow condition during

average day demand. Such calculations shall use C=130

and shall be approved by the City of Kingsport. However,

in no case may a 6-inch main extend beyond the last

connection with another water main greater than 2,000 feet,

except as follows: an exception may be granted by the City

Engineer when the following are all true:

1. The existing main at the point of connection is 6

inches

2. The proposed extension as a 6 inch main will

provide adequate volume and pressure over its

entire distance, including peak demands and fire

protection;

3. The most recently adopted Master Plan does not

specify otherwise for this location; and

4. There is no practical means to connect the extension

to another existing main (6 inches or larger)

anywhere along its route (when the proposed main

passes within 400 feet of an existing main 6 inches

or larger and a connecting water main can be placed

across this separation in accordance with these

standards, connection is considered practical).

Issued 10/2014 48

B. A water main may be 2 inches in diameter in a cul-de-sac

beyond the last fire hydrant, not to exceed 3000 feet in

length, provided adequate residual water pressure can be

maintained at peak flow as required by the TDEC, and

provided no future extension of the water main beyond the

cul-de-sac will be permitted and no fire hydrants are

required. A water main may also be 4 inches in diameter in

areas where all abutting land is developed as single family

residential, connected at both ends to a larger water main,

requires no fire hydrant or fire suppression service within

this length of proposed 4 inch pipe, and satisfies peak

demand and residual pressure requirements.

6-8.2 Design

All water mains 6 inch or larger shall be constructed of ductile iron

pipe and fittings as specified by AWWA C150 and C151 for laying

condition Type 2 and as required by the Construction

Specifications. All fittings, bends, tees, and crosses, and all straight

pipe joints within encasement pipe shall be adequately restrained.

All ductile iron pipe up to 12 inch shall be pressure class 350.

Ductile iron pipe 16 inch and larger shall be pressure class 250.

All water mains below 6 inch in diameter shall be constructed of

SDR-17 PVC pipe as specified by AWWA C900 and required by

the Construction Specifications, unless working pressures require a

higher pressure rating pipe. Pipe shall be installed according to

AWWA C605 and Construction Specifications

All water main pipe and fittings shall be rated for a working

pressure at least1.5 times the highest design static pressure in the

location where the pipe is being provided.

All water mains shall be specified to be installed with a minimum

of 36 inches of ground cover, but not greater than 4 feet of ground

cover except where prohibitive conflicts of limited distance require

deeper construction. Ground cover shall be measured as the

distance from the top of the pipe to final grade. When grading is to

be altered during construction, the proposed final grade shall be

shown on the plans for water system construction. Sections of

water main to have greater than 4 feet of cover or less than 30

inches shall be profiled on the plans to show required elevation and

show conflict being avoided, for the approval of the Engineering

Division.

Issued 10/2014 49

6-8.3 Location and Service Connections

Meter boxes shall be set near the property line (on public ROW) in

front of the property being served. Each meter shall have its own

service line.

When the required service line size for multiple-family,

commercial, or industrial property may be accurately defined, such

service lines and meter boxes/vaults shall be included with

construction of water mains. All service lines, meter boxes, and

meter vaults to be constructed as part of the water main extension

shall be shown to scale on the approved plans for construction.

6-9 Fire Hydrants and Blow-Offs

6-9.1 Location and Spacing of Fire Hydrants

Fire hydrants shall be supplied by not less than a 6-inch diameter

main. A gate valve shall be provided on each branch line to a fire

hydrant assembly and shall be located within 18 inches of the

hydrant branch tee. The minimum fire flow for fire hydrants shall

be determined by the needed fire flows for the property being

served. Where building sizes have not been determined, the

minimum base fire flow shall be 1,000 gpm for single family

dwellings and 1,500 gpm for other uses, unless otherwise

determined by the Fire Official.

Fire hydrants shall be within 600 feet of structures, when possible.

When structures are located over 600 feet from the ROW, a private

fire system may be required as determined by the Fire Official.

Where the building sizes have not been determined the minimum

locations shall be as follows:

A. In areas consisting exclusively of one- and two-

family residential homes, the maximum distance

between hydrants, measured along street

centerlines, shall be 1,200 feet, except as noted

otherwise below. In cul-de-sacs serving one- and

two-family residential homes exclusively, the last

hydrant shall be within 600 feet of the end of the

cul-de-sac as measured along the street centerline.

B. In all other districts, including multiple-family

residential, the maximum distance between

hydrants, measured along the street centerlines,

Issued 10/2014 50

shall be 1,200 feet. In cul-de-sacs, the last hydrant

shall be within 600 feet of the end of the cul-de-sac

as measured along the street centerline, unless

otherwise determined by the Fire Official.

C. Fire hydrants shall be located at street intersections

when possible; however, additional fire hydrants

may be located between intersections when

necessary to meet spacing requirements. Hydrants

between intersections shall be located adjacent to

boundaries between adjoining properties in

subdivided areas.

D. Fire hydrants may be placed in a staggered

arrangement on both sides of any street classified as

a major thoroughfare with the spacing specified

above, when approved by the Fire Official.

When new buildings are constructed or existing buildings are

expanded, required fire hydrant locations shall be determined by

the latest International Fire Code. The Owner/Developer of the

extension or modification to the Water Distribution System shall

demonstrate by actual tests that the system will supply the required

fire flow. These tests may be required to be witnessed by the Fire

Official.

6-9.2 Location of Blow-offs

Blow-offs shall be installed at the end of all dead-end water

lines at points to allow for natural drainage. Fire hydrants may

serve as a blow-off on lines 6 inches to 12 inches in diameter.

Blow-offs on transmission mains larger than 12 inches shall be

sized to provide a flushing velocity in the transmission main up to

5 feet per second. Blowoffs shall not be located where there is a

possibility of flooding private property.

6-10 Valves

6-10.1 Location

Valves shall be installed within 18 inches of branch fittings (either

tee or cross) at the intersection of two water mains, or a water main

and either a hydrant or blow-off branch line. Maximum separation

between valves along a water main shall be 1,000 feet.

The number of valves at a branch fitting shall be determined as

follows:

Issued 10/2014 51

A. At a cross fitting with only one direction supplying

from the water source, a minimum of three valves

shall be installed, one on each of the “dead-end”

directions.

B. At a cross fitting with three directions supplying

from the water source, a minimum of three valves

shall be installed, one in each supply direction.

C. At a cross fitting with two directions supplying

from the water source, four valves shall be installed,

one in each direction.

D. At a cross fitting with all four directions supplying

from the water source, three valves shall be

installed in the directions with smaller diameter

mains (if the main size is the same in all directions,

designer choice).

E. At a tee fitting with only one direction supplying

from the water source, a minimum of two valves

shall be installed, one on each of the “dead-end”

directions.

F. At a tee fitting with two directions supplying from

the water source, a minimum of two valves shall be

installed, one in each supply direction, except at a

hydrant tee one valve shall be on the hydrant branch

and the second on either side of the tee.

When there already exists a valve within 200 feet of a tee or cross

intersection in one or more directions and the requirements above

would specify a new valve in that direction, the existing valve is

deemed to be sufficient and an additional valve in that direction is

not required.

6-11 Water Service Lines & Meters

6-11.1 Size and Location

Individual water services shall be provided from the main to each

water meter for single family residences. No individual water

meter may serve more than one property.

On property where two or more meters are provided to serve more

than one building or unit on the same property, each meter shall be

Issued 10/2014 52

located directly in front of the unit or building served, or the meter

boxes shall be clearly labeled to describe the address of the unit or

building served. If labeling is used, a permanent nameplate with

engraving of address shall be permanently secured to the interior

wall of each meter box within 3 inches of the top of the box, of

non-corrosive materials. The developer or builder is also

responsible for insuring that plans for construction define which

meter goes with which unit or building, and that the plumber hired

to connect the plumbing to the building or units connects the

plumbing to comply with the schedule shown on the plans and

labeled on the meter boxes.

All service connections shall be made perpendicular from the main

line and shall run straight to the meter which shall be located at the

edge of the serviced lot's right-of-way or easement. All new water

meter boxes or vaults shall be located outside the street, sidewalk,

or parking areas in residential areas. In non-residential areas, meter

location shall be considered on a case-by-case basis, but generally

as close to the main as possible.

Service taps on new water lines shall be made by the Contractor

when required by these Standards. Taps made by the Contractor

may be made by wet tap or dry tap. Wet taps shall be made after

the new water system is pressurized, but before the new water

main is hydrostatically tested, disinfected, and connected to the

active water system.

The size and type of water meter shall be determined under

consultation with the Water/Wastewater Division based on type of

facility receiving service, projected peak water demand, and

expected fluctuation in water demand, and shall be selected to

insure high standards for accuracy for all service conditions. The

size shall be the smallest which is designed for a normal test flow

rate covering both the minimum and maximum flow rate expected

by the customer. AWWA Manual M22 shall be used as a reference

for sizing of water meters.

6-12 Relation of Water Mains to Other Utilities

6-12.1 Sanitary and Storm Sewers

Normal Conditions – Water mains shall be laid at least 10 feet

horizontally from any sanitary sewer, storm sewer, or sewer

manhole, whenever possible; the distance shall be measured edge-

to-edge.

Unusual Conditions – When local conditions prevent a horizontal

Issued 10/2014 53

separation of 10 feet, a water main may be laid closer to a storm or

sanitary sewer provided that:

 The bottom of water main is at least 18 inches above the

top of the sewer.

 Where this vertical separation cannot be obtained, the

sewer shall be constructed of materials and with joints that

are equivalent to water main standards of construction and

shall be pressure tested to assure water tightness prior to

backfilling.

6-12.2 Crossing of Sanitary and Storm Sewers

Normal conditions – Water mains crossing house sewers, storm

sewers, or sanitary sewers shall be laid to provide a separation of at

least 18 inches between the bottom of the water main and the top

of the sewer, wherever possible.

Unusual conditions – When local conditions prevent a vertical

separation as described above, the following construction shall be

used:

 Sewers passing over or under water mains shall be

constructed of materials and with joints that are equivalent

to water main standards of construction and shall be

pressure tested to assure water tightness prior to

backfilling.

 Water mains passing under sewers shall, in addition, be

protected by providing:

o A vertical separation of at least 18 inches between

the bottom of the sewer and the top of the water

main;

o Adequate structural support for the sewers to

prevent excessive deflection of joints and settling

on and breaking the water mains;

o That the length of water pipe be centered at the

point of crossing so that the joints will be

equidistant and as far as possible from the sewer;

o Both the sewer and the water main shall be

constructed of water pipe and pressure tested.

Sewer manholes - No water pipe shall pass through or come into

contact with any part of a sewer or sewer manhole.

6-12.3 Natural Gas Mains, Cables, and Other Utilities

Other utilities shall have a minimum horizontal clearance of 2 feet

and vertical clearance of 4 inches, to permit proper maintenance of

the water main.

Issued 10/2014 54

6-13 Cross Connection

Backflow protection devices shall be installed and maintained by

the customer. The determination of the requirement for a backflow

protection assembly shall be made according to the City’s current

Cross Connection Control Plan. The plan will be supplied upon

request.

6-14 Water Booster Pump Stations

6-14.1 Applicability

When required, a booster pump station, reservoir, and

instrumentation controls shall be designed and constructed as part

of an extension or modification of the Water Distribution System

to maintain necessary available water volume and necessary but

not excessive water system pressures to points of service.

Except as specifically approved otherwise in writing by the City

Engineer, pumping units shall not cause drop in suction pressures

greater than 20 psi between operating and stopped condition, and

shall not cause service pressure at any meter in water distribution

system under peak demand conditions to drop below 40 psi or

increase above 120 psi under static (no demand) condition.

Pump design flow rate in gallons per minute, and reservoir storage

volume in gallons, shall be stipulated in the Letter of Commitment.

Guidelines used by the Water/Wastewater Division in developing

these requirements include the following:

A. Satisfy peak demand projections with minimum 40 psi

residual at all points in the Water Distribution System;

B. Satisfy projected average day demand coincident with fire

flow demand with minimum 20 psi residual at all points in

the Water Distribution System, with 25% of the reservoir

volume conserved at the end of the fire demand period if

the reservoir was full when the fire demand began;

C. Maximum residual static pressure at any point in the Water

Distribution System not in excess of 120 psi with booster

pump off

6-14.2 Intent

Because of the significant variability of pump station designs

depending on location and site specific characteristics, these

Issued 10/2014 55

standards are intended to be general guidelines of the basic

requirements and are not intended to be specific or detailed. The

designer shall develop detailed specifications for construction as a

part of the pump station design.

A separate and unique site plan for each pump station shall be

developed based on the topographic and subsurface features of the

specific site. For pump design, the design flow rate shall be as

specified in the Letter of Commitment. Total dynamic head

requirements shall be calculated by the engineer of record based on

flow rate, pipe sizes, and specific reservoir elevation and

characteristics through the development of a System Curve, and

Pump Curve data provided by acceptable pump manufacturers.

6-14.3 Pump Design

The Engineer of record shall determine the pumping capacity and a

total dynamic head of the pumping units based on the specific

elevation requirements, storage availability, pipe head loss

calculations, acceptable pressure range for all customer service

connections, average demand with fire flow required, and peak

demand.

6-14.4 Building or Enclosure

Pump station shall be designed for ground level entry to pumping

units, internal piping and accessories, and electrical switchgear and

controls, through a standard doorway. Access designed for

confined space entry will not be acceptable. Building or enclosure

shall be low maintenance, insulating walls with air conditioning

and thermostat controlled unit to maintain maximum temperature

of 80 degrees F when outdoor temperature reaches 100 degrees F.

Heating unit shall maintain temperature of at least 60 degrees F

when outdoor temperature reaches -10 degrees F. Space shall be

adequate to meet all building and electrical codes and permit

maintenance of individual equipment components without

disassembly of other

equipment or interruption of service. Minimum 50-year design life

shall be used.

The building shall incorporate natural light by use of skylights.

The building shall be interfaced with the water plant.

Overhead beam and crane shall be provided if weight of pump

assembly exceeds 500 pounds. When not provided, adequate space

shall be provided between pumping units to access portable A-

frame with pulley to lift pump assemblies. Security fencing with

minimum three barbed wire strands, dead bolt door locks, or

Issued 10/2014 56

equivalent access security shall be provided.

Factory built package units may be accepted provided they meet

the requirements of these standards. The developer shall submit

such requests to the Engineering Division for approval.

Exterior architectural features and landscaping may be designed to

“fit into” the theme of surrounding properties, subject to these

standards and approval by the Water/Wastewater Division.

Issued 10/2014 57

7. Sanitary Sewer Collection System

7-1 General

All proposed connections and authorized new extensions or modifications

to the existing Public Sewer Collection System shall conform to these

Design Standards and be constructed in accordance with Tennessee

Division of Environment and Conservation – “Design Criteria for Sewage

Works” and the City of Kingsport Construction Specifications.

7-2 Engineering Plans and Approval

All new extensions or modifications to the Sewer Collection System shall

be provided on engineering plans conforming to these standards, sealed by

a Registered Professional Engineer, and approved by the City of Kingsport

Engineering Division or TDEC. Hydraulic calculations shall accompany

the plans.

Design shall further conform to all other applicable federal, state, and

local laws and regulations, and all required permits shall be obtained prior

to construction. Engineering plans shall clearly show and label the

proposed sewer line extension, all fittings and appurtenances, and public

sewer lateral locations to be installed; existing and/or proposed roads and

road right-of-way; water line, sanitary sewer, and storm sewer easements;

lot lines; lot numbers; proposed location of all new or existing

underground utilities within the same right-of-way as the proposed system

improvements; topographic information or profile view to include

proposed final depth of bury; north arrow; location map; applicable and

current City of Kingsport construction details; and any other information

necessary for the appropriate and accurate construction of the proposed

system extension or modification.

7-3 Right-of-Way and Access

All proposed extensions or modifications to the system that are to be

owned and maintained by the City of Kingsport shall be within a publicly-

owned and maintained dedicated street right-of-way or easement.

Whenever practical, mains and appurtenances shall be located outside of

paved or otherwise improved surfaces and shall maintain a horizontal

separation of at least 3 feet from all utilities, with the exception of water

which shall have a horizontal separation of 10 feet.

7-4 Pre-Construction Meeting and Notice to Proceed

No construction of extensions or modifications shall begin before plans

are approved for construction and Authorization to Construct Permit is

granted by the Engineering Division through a Pre-Construction Meeting

coordinated by the Engineering Division. Any construction done prior to

this Notice may be summarily rejected or refused without further

investigation. In addition, beginning construction without authorization

Issued 10/2014 58

violates State regulations and subjects the offender to State enforcement

actions.

7-5 Contractor License Requirement

All contractors and subcontractors performing any construction on sewer

collection system extensions or modifications, except Personnel of the

Kingsport Water/Wastewater Division, shall be licensed Utility

Contractors by the State of Tennessee. The developer shall provide the

Engineering Division with the names and license number of each

contractor or subcontractor before each begins construction.

7-6 Accessibility During Construction

The construction site shall be accessible at all times from the Notice to

Proceed for inspection of progress by the Engineering or

Water/Wastewater Division. Failure to provide accessibility may result in

rejection of the work.

7-7 Connections to Existing Sewer System

7-7.1 Refer to City of Kingsport Construction Specifications for

appropriate detail drawings for use in plans.

7-7.2 All connections to the existing Sewer Collection System shall be

made by or approved by the City of Kingsport Water/Wastewater

Division. Connections include tapping of existing active sewer

mains or existing manholes.

7-7.3 8 inch and larger Sewer Taps

The contractor shall perform all excavation and backfill, through

trenching and shoring practices which at all times meet the

requirements of City of Kingsport Construction Specifications and

TOSHA, and shall provide all safety barricading, traffic control

devices, required permits, and other protection of the excavation.

The contractor shall expose the sewer infrastructure or main to be

tapped, and clean all dirt and debris from the existing structures.

The contractor shall pay the appropriates fees for the

Water/Wastewater Division to make the tap into the system or hire

a City approved company to build the connection, meeting these

standards and the Construction Specifications, and test the

connection with compressed air to insure it is properly installed.

7-7.4 6 inch and smaller Sewer Taps

The City of Kingsport’s Water/Wastewater Division will furnish

and install 6 inch and smaller sewer taps onto the Public Sewer

System, after the appropriate fees are paid, and extend a 6 inch

Issued 10/2014 59

public sewer lateral to the nearest property line, and will terminate

with a two-way cleanout for the Contractor/Developer to connect

onto.

The Contractor shall provide a minimum of three weeks advance

notice to the Water/Wastewater Division to request a tap, and the

Contractor is strongly encouraged to provide additional notice

when possible. All requests, except emergency repairs, of less than

72 hours will be denied.

Issued 10/2014 60

8. Wastewater Pump Stations

8-1 General

8-1.1 Location and Flood Protection

Wastewater pump stations should be located as far as practicable

from present or proposed built-up residential areas, and a paved

access road shall be provided, with 6 inches of stone and 2 inches

of binder, minimum. Noise control, odor control, and station

architectural and landscaping design should be taken into

consideration. Sites for stations shall be of sufficient size for

future expansion or addition, if applicable. The station site for all

above ground stations shall also be fenced and locked.

The station’s operational components shall be located at an

elevation that is not subject to the 100-year flood or shall otherwise

be adequately protected against the 100-year flood damage. The

top (floor) of the pump station shall be a minimum of 6 inches

above the finished grade of the site around the station.

Where the wet well is at a depth greater than the water table

elevation, special provisions shall be made to ensure water tight

construction of the wet well. Any connections to the pump station

shall be made at an elevation higher than the maximum water table

elevation, where possible.

The site for the pump station shall be a minimum of 25 feet by 25

feet in size. Larger sites will be required dependent upon the size

of the station. A chain link fence shall be provided around the site.

The site shall be large enough to allow maintenance trucks to turn

around on the site. The site shall be dedicated to the City as public

property and the site shall have access to a public street.

For accessibility, a 25 foot right-of-way (connecting to a public

street) shall be provided for all pump stations. The width of an

access road shall be 12 feet minimum. Storm drainage ditches and

culverts shall be provided. All graded areas along the access road

shall be a maximum slope of 2:1 (horizontal:vertical). All graded

areas shall be satisfactorily seeded and mulched. Vertical gradient

for the access road shall not exceed 12%. Provisions shall include

sufficient right-of-way for overhead power and telephone service.

Site shall be graded to allow drainage and prevent ponding of

storm water.

Issued 10/2014 61

8-1.2 Pumping Rate and Number of Units

At least two pump units shall be provided, each capable of

handling the maximum design flow (residential pump stations shall

be simplex – one unit). Pump and system head curves shall be

submitted to the City of Kingsport Engineering Division for review

and approval.

Where three or more units are provided, they shall be designed to

fit actual flow conditions and shall be of such capacity that, with

any one unit out of service, the remaining units will have capacity

to handle the maximum sewage flow. The number of pump units

may be controlled by the reliability classification of the adjacent

receiving waters.

When the station is expected to operate at a flow rate less than one

half the average design flow for an extended period of time, the

design shall address measures taken to prevent septicity from long

holding times in the wet well.

For standardization purposes, the following pump stations shall be

specified:

A. For duplex submersible grinder pump stations –

Hydromatic, Barnes, and/or Zoeller.

B. For simplex, submersible residential grinder pump stations

– Environment One (E-One).

C. For duplex, submersible solids handling/non-clog pump

stations – Flygt, and/or KSB.

D. For duplex, suction lift/self priming pump stations –

Gorman–Rupp.

Plan sheets showing the requirements for these standardized pump

stations can be obtained from the City of Kingsport Engineering

Division. These standard plan sheets shall be completed by a

registered professional engineer. The completed plan sheets shall

be reviewed and approved by the City of Kingsport Engineering

Division prior to construction.

Issued 10/2014 62

8-1.3 Pumping Units

8-1.3.1 Pump Openings

Solids handling/non-clog pumps and suction lift/self priming

pumps shall be capable of passing solids of at least 3 inches in

diameter.

8-1.3.2 Priming

Pumps shall be so placed that under normal operating conditions

they will operate under a positive suction head (except for suction

lift pumps).

8-1.3.3 Intake

Each pump shall have an individual intake. Wet well design should

be such as to avoid turbulence near the intake.

8-1.3.4 Controls

Control float switches should be so located as not to be affected by

the flows entering the wet well or by the suction of the pumps.

Controls shall be able to activate additional pumps if water in the

wet well continues to rise. Provisions should be made to

automatically alternate the pumps in use. Pump stations with

motors and/or controls below grade should be equipped with a

secure external disconnect switch. If float switches are used, an

“intrinsically safe” power source shall be considered.

Where a pump station requires and utilizes a controller device, the

Multitrode Multismart controller shall be used.

8-1.4 Flow Measurement

Suitable devices for measuring sewage flow should be provided at

pumping stations with flow capacity greater than 1.0 million

gallons per day (mgd). Hour timers (totalizers) shall be installed

on all pumps unless otherwise approved by the Division.

8-1.5 Alarm System

An alarm system shall be provided for all pumping stations.

Consideration of telemetry alarm to 24-hour monitoring stations or

telephone alarms to duty personnel shall be given when reliability

classifications or property damage warrants it. When telemetry is

not used, an audiovisual device should be installed at the station

for external observation.

Alarms for high wet well and power failure shall be provided, as a

minimum, for all pump stations. For larger stations, alarms

signalizing pump and other component failures or malfunctions

should also be provided.

Issued 10/2014 63

A backup power supply, such as a battery pack with an automatic

switchover feature, shall be provided for the alarm system, such

that a failure of the primary power source will not disable the

alarm system. Test circuits should be provided to enable the alarm

system to be tested and verified that it is in good working order.

8-1.6 Emergency Overflow Pumping

A separate valve vault with appropriate valving, piping, fittings,

and connections shall be provided for all pump stations to hook up

portable pumps.

8-2 Special Details

8-2.1 Materials

In the selection of materials, consideration should be given to the

presence of hydrogen sulfide and other corrosive gases, greases,

oils, and other constituents frequently present in sewage.

8-2.2 Electrical Equipment

Electrical systems and components (e.g., motors, lights, cables,

conduits, switchboxes, control circuits) in enclosed or partially

enclosed spaces where flammable mixtures occasionally may be

present (including raw sewage wet wells) shall comply with the

National Electrical Code requirements for Class I Division 1

locations.

Electrical equipment shall be enclosed in a weatherproof stainless

steel enclosure.

8-2.3 Water Supply

There shall be no physical connection between any potable water

supply and a wastewater pump station which under any conditions

might cause contamination of the potable water supply.

A freeze proof yard hydrant with backflow preventer shall be

installed at all wastewater pump station locations.

8-2.4 Lighting

Adequate lighting for the entire pump station shall be provided.

8-2.5 Pump and Motor Removal

Provisions shall be made to facilitate removing pumps, motors, and

other equipment, without interruption of system service.

8-2.6 Access

Suitable and safe means of access should be provided to equipment

Issued 10/2014 64

requiring inspection or maintenance. Stairways and ladders shall

satisfy all OSHA requirements.

8-2.7 Valves and Piping

Suitable shutoff valves shall be placed on suction and discharge

lines of each pump for normal pump isolation. A check valve

should be placed on each discharge line between the shutoff valve

and the pump. Pump suction and discharge piping should not be

less than 4 inches in diameter except where design of special

equipment allows. The velocity in the suction line should not

exceed 6 feet per second and, in the discharge piping, 8 feet per

second. A separate shutoff valve is desirable on the common line

leaving the pump station.

A separate valve vault shall be installed at each pump station

location. All pipe within the wet well and valve vault shall be

ductile iron or stainless steel. A quick connect/disconnect fitting

shall be installed in all the valve vaults. See standard pump station

plan sheet for details.

8-2.8 Ventilation

Ventilation should be provided for all pump stations during all

periods when the station is manned. Where the pump is below

ground, mechanical ventilation is required and should be arranged

so as to independently ventilate the dry well. If screens or

mechanical equipment, which might require periodic maintenance

and inspection, are located in the wet well, then it should also be

mechanically ventilated. There should be no interconnection

between the wet well and the dry well ventilation systems. In pits

over 15 feet deep, multiple inlets and outlets are desirable.

Dampers should not be used on exhaust or fresh air ducts, and fine

screens or other obstructions in air ducts should be avoided to

prevent clogging. Switches for operation of ventilation equipment

should be marked and conveniently located above grade and near

the pump station entrance.

Consideration should be given also to automatic controls where

intermittent operation is used. The fan wheel should be fabricated

from nonsparking material. In climates where excessive moisture

or low temperature is a problem, consideration should be given to

installation of automatic heating and/or dehumidifying equipment.

Where heat buildup from pump motors may be a problem,

consideration should be given to automatic ventilation to dissipate

motor heat.

Issued 10/2014 65

8-2.9 Emergency Power Supply

Provision of an emergency power supply for pumping stations may

be made, and may be accomplished by connection of the station to

at least two independent public utility sources, or by provision of

in-place internal combustion engine equipment that will generate

electrical or mechanical energy, or by provision of portable

pumping equipment. Emergency power shall be provided for all

stations which are 1 MGD or larger. Emergency power shall be

provided that, alone or combined with storage, will prevent

overflows from occurring during any power outage that is equal to

the maximum outage in the immediate area during the past 10

years. If available data are less than 10 years, an evaluation of a

similar area served by the power utility for 10 years would be

appropriate.

8-3 Wet Wells and Valve Vaults

8-3.1 Materials

For grinder pump stations, wet wells and valve vaults shall

be fiberglass. Integral wet wells and valve vaults are

recommended.

For solids handling/non-clog and suction lift/self priming

pump stations, wet wells and valve vaults shall be concrete.

Wet well and valve vault shall be separate structures.

8-3.2 Wet Well Size

The effective capacity of the wet well should be evaluated

based on pumping requirements and reliability

classifications.

8-3.3 Floor Slope

The wet well floor should have a minimum slope of 1-to-1

in the hopper bottom. The horizontal area of the hopper

bottom should be no greater than necessary for proper

installation and function of the inlet.

8-3.4 Ventilation

Wet well shall be designed to allow ventilation. Vents

shall be constructed of stainless steel.

Issued 10/2014 66

8-4 Suction Lift/Self Priming Pump Stations

8-4.1 Priming

Conventional suction lift/self priming pumps should be of the self-

priming type, as demonstrated by a reliable record of satisfactory

operation. The maximum recommended lift for a suction lift pump

station is 15 feet, using pumps of 200 gallons per minute (gpm)

capacity or less.

8-4.2 Capacity

The capacity of suction lift/self priming pumps should be limited

by the net positive suction head and specific speed requirements,

as stated on the manufacturer’s pump curve, for the most severe

operating conditions.

8-4.3 Air Relief

8-4.3.1 Air Relief Lines

All suction lift/self priming pumps shall be provided with an air

relief line on the pump discharge piping. This line should be

located at the maximum elevation between the pump discharge

flange and the discharge check valve to ensure the maximum

bleed-off of entrapped air. Air relief piping shall be sized

appropriately. A separate air relief line shall be provided for each

pump discharge. The air relief line should terminate in the wet

well or suitable sump and be open to the atmosphere.

8-4.3.2 Air Relief Valves

Air relief valves should be provided in air relief lines on pumps not

discharging to gravity sewer collection systems. The air relief

valve should be located as close as practical to the discharge side

of the pump.

8-4.4 Pump Location

Suction lift/self priming pumps shall not be located within the wet

well.

8-4.5 Access to Wet Well

Access to the wet well should not be through the dry well, and the

dry well should have a gastight seal when mounted directly above

the wet well.

Issued 10/2014 67

8-5 Submersible Pumps

8-5.1 Pump Removal

Submersible pumps shall be readily removable and replaceable

without dewatering the wet well or requiring personnel to enter the

wet well. Continuity of operation of the other units shall be

maintained.

A hoist and accessories for removing the pumps from the wet well

should be provided.

8-5.2 Controls

The control panel shall be located outside the wet well and suitably

protected from weather, humidity, and vandalism. Control panel

shall be constructed of weather proof stainless steel.

8-5.3 Valves

All control valves on the discharge line for each pump should be

placed in a convenient location outside the wet well in separate pits

and be suitably protected from weather and vandalism. Outside

valve covers should not be installed.

8-6 Operability and Reliability

8-6.1 Objective

The objective of reliability is to prevent the discharge of raw or

partially treated sewage to any waters and to protect public health

by preventing backup of sewage and subsequent discharge to

basements, streets, and other public and private property.

8-6.2 Backup Units

A minimum of two pumps shall be provided in each station. Each

pump shall be capable of delivering the maximum design flow.

8-7 Force Mains

8-7.1 Size

Minimum size force mains should be not less than 4 inches on

diameter, except for grinder pumps. All force main inside the wet

well and valve vault and within 5 feet of the wet well, and valve

vault shall be stainless steel or ductile iron. Remainder shall be

AWWA C900 or C905 piping with metallic tracing tape or wire.

Issued 10/2014 68

8-7.2 Velocity

At pumping capacity, a minimum self-scouring velocity of 2 feet

per second (fps) should be maintained. Velocity should not exceed

8 feet per second.

8-7.3 Air Relief/Vacuum Valve

An air relief/vacuum valve shall be placed at the necessary high

points in the force main where the elevation differential is greater

than 5 vertical feet to relieve air locking. Air relief valves shall be

installed according to the City of Kingsport Engineering Division’s

detail.

8-7.4 Termination

The force main shall enter the receiving manhole with its

centerline horizontal and with an invert elevation that will ensure a

smooth flow transition to the gravity flow section; but in no case

shall the force main enter the gravity sewer system at a point more

than 1 foot above the flow line of the receiving manhole. The

design should minimize turbulence at the point of discharge.

Consideration should be given to the use of inert materials or

protective coatings for the receiving manhole to prevent

deterioration as a result of hydrogen sulfide or other chemicals

where such chemicals are present or suspected to be present

because of industrial discharges or long force mains.

8-7.5 Pressure Tests

Before backfilling, all force mains shall be tested at a minimum

pressure of at least 50 percent above the design operating pressure

for at least 30 minutes. Leakage shall not exceed the amount given

by the following formula:

L = ND(P)

0.5

7,400

Where L is allowable leakage in gallons per hour,

N is the number of pipe joints (18 foot joints),

D is the pipe diameter in inches,

P is the test pressure in psi.

8-7.6 Restraint

Force mains shall be sufficiently anchored and restrained within

the pump station and throughout the line length. The number of

bends shall be as few as possible. Thrust blocks and restrained

joints shall be provided where restraint is needed.

Issued 10/2014 69

8-7.7 Friction Losses

A “C” factor shall be used that will take into consideration the

conditions of the force main at its design usage. A pipe that is

coated with grease after several years will not have the same “C”

factor as it did when it was first placed into operation.

8-7.8 Water Hammer

The force main design shall investigate the potential for the

existence of water hammer.

8-7.9 Flushing & Cleanouts

There shall be a means of cleaning the system, particularly to clear

any settleable solids or grease accumulation.

Cleanouts and valves shall be provided at a maximum of 400 foot

intervals.

8-7.10 Location

Force mains may be installed within the same ditch line as gravity

sewer provided that the same spacing requirement regarding to

water lines is maintained. Special care shall be provided to protect

both the force main and the gravity sewer during construction and

during the operation of the sanitary sewer system.

Issued 10/2014 70

9. Storm Water Management, Erosion Prevention, and Sediment Control

9-1 Erosion Prevention and Sediment Control

Refer to the Tennessee Division of Environment and Conservation

Erosion Prevention and Sediment Control Handbook of latest issue.

9-2 Storm Water Management

Refer to the City of Kingsport Stormwater Management Ordinance of

latest issue.

Issued 10/2014 71

10. Landscaping

10-1 Types of Landscaping

Landscaping may consist of, but is not limited to:

A. Lawn Installation:

Soil Preparation, Application of Soil Amendments, Seeding, Sodding,

Mulching, Watering, Initial Maintenance, Replanting of Unsatisfactory

or Damaged Turf.

B. Plant Material Installation:

Proper Selection, Backfilling and Bed Preparation, Handling of Plant

Material, Planting, Weed Removal, Mulching, Initial Maintenance and

Care

C. Lawn Maintenance:

Mowing, Watering, Fertilizing, Aeration, Topdressing, Insect and

Disease Control

D. Shrub, Groundcover, and Tree Maintenance:

Pruning, Watering, Fertilizing, Mulching, Insect and Disease Control

E. Excavation, Backfilling or other preparations of an area where future

landscaping may be installed.

10-2 Standards

10-2.1 Documents

The design and execution of work shall comply with the provisions

of the latest editions of the following specifications, standards,

ordinances, and zoning requirements except as otherwise shown or

specified herein.

A. AMERICAN STANDARD FOR NURSERY STOCK, (Latest

Edition Available)

B. AMERICAN NATIONAL STANDARDS FOR

ARBORICULTURAL AND TREE CARE OPERATIONS

(Latest Editions Available)

C. ORDINANCE NO. 5171, ALSO KNOWN AS THE CITY OF

KINGSPORT’S TREE ORDINANCE

D. ORDINANCE NO. 3191, ALSO KNOWN AS THE CITY OF

KINGSPORT’S LANDSCAPING ORDINANCE

Issued 10/2014 72

E. SECTION 114 OF THE CITY OF KINGSPORT’S CODE OF

ORDINANCES

10-2.2 Topsoil

Topsoil shall be natural, fertile, friable sandy loam soil, typical of

the locality and obtained from well-drained areas. It shall be

without admixture of subsoil or slag and shall be free of stones,

lumps, sticks, plants or their roots, toxic substance or other

extraneous matter that would be harmful to plant growth or would

interfere with future maintenance. Topsoil pH range shall be 5.5 to

6.5.

10-2.3 Soil Conditioners and Amendments

A. Agricultural limestone shall contain not less than 95 percent

calcium carbonate equivalent and shall be ground to such fineness

that at least 98 percent will pass a 20-mesh sieve and at least 50

percent will pass a 100-mesh sieve.

B. Aluminum sulfate shall be horticultural grade.

C. Peat shall be a natural product of sphagnum moss peat (peat

moss), derived from a freshwater site conforming to ASTM D2607

except as otherwise specified. Peat shall be measured in a dry

condition, containing not more than 35% moisture by weight.

D. Sand shall be clean and free of toxic materials.

E. Vermiculite shall be horticultural grade and free of any toxic

materials.

F. Gypsum shall be 90 percent pure, free of any toxic materials,

and at least 95 percent by weight shall pass a 4-mesh sieve.

G. Other amendments as recommended shall be approved by the

Landscape Specialist upon requested use.

10-2.4 Seed

Seed shall be the best blend of certified lawn grass and/or ground

cover. Seed must be common to the site location and comply with

established tolerances for germination and purity in accordance

with the U. S. Division of Agriculture Rules and Regulations under

the latest edition of the Federal Seed Act. Seed mixture and

seeding rate shall be specified on the drawings.

10-2.5 Fertilizer

All fertilizers shall be complete formula fertilizers and shall

conform to the applicable State and Federal Laws. All fertilizers

shall be uniform in composition, free-flowing and suitable for

application with approved equipment. Fertilizers shall be fully

labeled and shall bear the name, trade name, trademark, and

warranty of the producer.

Issued 10/2014 73

10-2.6 Planting Mixture

Planting mixtures shall consist of a uniform mixture of three parts

topsoil and one part peat moss. The mixture must be thoroughly

ground up and mixed so that there is no visible segregation of

material.

10-2.7 Pesticides

A. All pesticides must comply with all applicable State and Federal

Laws and be registered with the U. S. Environmental Protection

Agency.

B. Pesticides may only be applied by a Tennessee Division of

Agricultural Licensed Company.

10-2.8 Water

Water shall not contain elements toxic to plant life and shall be

obtained from a locally approved water source.

10-2.9 Mulches

A. Mulches for plant stock shall be Shredded Pine Bark Mulch. It

shall be of a relative uniform particle size with a median size of

one and one-half inches (1-1/2") and shall be free of sticks, stones,

leaves and any other debris.

B. Mulches for lawn areas:

1. Seeded areas 3:1 slope or less shall be clean, dry, weed-

free straw suitable for placing with mulch blower

equipment or by hand.

2. Seeded areas over 3.1slope shall be:

a) A clean, dry and weed-free straw matting with binding

material of a readily decomposing nature.

b) A wood cellulose fiber for use with hydraulic

application of grass and seed and fertilizer. The wood

cellulose shall consist of commercially prepared natural

wood cellulose fiber or wood pulp processed to contain no

growth or germination-inhibiting factors. The wood

cellulose fiber shall be manufactured so that the fibers

disperse readily and uniformly as homogeneous slurry.

10-2.10 Plant Stock

A. Plant Material shall be first quality stock and shall conform to

the code of standards set forth in the current edition of the

American Standards for Nursery Stock sponsored by the American

Association for Nurserymen, Inc.

B. Species and variety as specified shall be certified true to their

genus, species and variety.

C. Planting stock shall be well branched and well formed, sound,

vigorous, healthy, free from disease, sun-scale, windburn,

Issued 10/2014 74

abrasion, and harmful insects or insect eggs, and shall have

healthy, normal unbroken root systems. Deciduous trees and

shrubs shall be symmetrically developed or uniform habit of

growth, with straight trunks or stems.

D. All plant material measurements shall be in strict accordance

with the latest edition of the American Standard for Nursery Stock.

Please refer to the “Landscape and Land Use Approved Plant List

for acceptable types and minimum sizes. Any plant not on this list

must be approved before use by the City’s Landscape Specialist.

E. Tree caliper measurements shall be taken at a point on the trunk,

six inches (6") above natural ground for trees.

10-3 Execution of Work

10-3.1 Underground Obstructions

The location of underground obstructions or utilities shall be the

responsibility and at the expense of the installer. Care shall be

taken when excavating plant pits and placing stakes and anchors in

the proximity of such obstructions to avoid damaging them or any

work done by others.

10-3.2. Protection of Existing Vegetation

A. If lawns have been established prior to planting operations; the

surrounding turf shall be covered in a manner that will protect turf

areas before excavations begin.

B. During excavation, conflicts with existing plant roots and

branches should be avoided. However if pruning is required, a

proper cut shall be performed smoothly and neatly without

splitting or crushing. Do not use tree paint or wound dressing.

10-3.3. Installation of Topsoil

A. Prior to topsoil placement, areas to receive topsoil shall be

cleared of all debris.

B. A minimum of six inches (6") of topsoil shall be placed over all

areas to be established in turf, shrubs or groundcover, except

planter islands as specified below. The topsoil layer shall bring all

landscape areas to finish grade.

C. A minimum of twenty-four inches (24”) of topsoil shall be

placed in any areas where plants and trees are to be installed or

plan to be installed at a future date. (This is also referred to as a

planter island). Depending on the design this may require the

removal of the sub-grade or existing material.

D. Planter islands shall be bermed to a high point of six inches (6")

above the adjacent curb or lawn area (or higher if necessary) to

ensure positive drainage (a minimum of 5% slope).

Issued 10/2014 75

E. Fertilizer and soil amendments as recommended shall be

thoroughly tilled in before placing into planter areas.

F. After soil amendments have been thoroughly tilled in to soil, all

areas are to be rolled in to firm up and compact the soil. Care shall

be taken as not to over compact the soil (Maximum Compaction of

85% Standard Proctor). During the rolling, all depressions caused

by settlement of rolling shall be filled with additional topsoil and

the surface shall be re-graded and rolled until presenting a smooth

and even finish to the required finish grade.

G. Finish grading shall be done just prior to seeding or sodding.

The entire area shall be raked to a smooth surface free of all clods,

roots, stones 1" or larger, any other debris that might interfere with

planting or maintenance operations.

10-3.4. Seeding

A. Topsoil, fertilizer, lime and seed shall be applied to all areas to

be seeded as specified herein and in accordance with standard

horticultural practices.

B. Any irregularities in the surface resulting from fertilizing,

liming, tilling, or other causes shall be smoothed prior to

application of seed.

C. Seeding shall not be done during windy weather or when the

ground is excessively wet, frozen or otherwise un-tillable.

D. Seeding may be applied with a mechanical hand seeder or by

hydro-seeding at the normally expected rate for the type applied.

E. Immediately after seeding, all areas shall be lightly rolled. If,

due to slope conditions, rolling cannot be done, seed shall be raked

unto top ¼” of soil. Mulch as specified below shall be applied

immediately after seed has been sown.

F. All seeded areas shall be mulched immediately after seeding.

Mulch may be either dry straw or wood cellulose fiber. Straw shall

be applied at a rate of 100 pounds per 1,000 square feet.

G. Seeded areas shall be watered regularly to ensure good

germination and growth.

10-3.5. Sodding

A. Topsoil, fertilizer, lime and seed shall be applied to all areas to

be sodded as specified herein and in accordance with standard

horticultural practices.

B. Any irregularities in the surface resulting from fertilizing,

liming, tilling, or other causes shall be smoothed prior to

application of sod.

C. Sodding shall not be done when the ground is excessively wet,

frozen or otherwise un-tillable.

D. Sod is to be “American Sod Producers Association” certified,

cultivated, turf type grass sod.

Issued 10/2014 76

E. Sod must also be a minimum age of 18 months, with a root

development that will support its own weight without tearing when

suspended vertically by holding the upper corners, free of stones

and not containing more than 10 weeds per 1000 sq.ft.

F. Sod must be delivered on pallets or in rolls and the roots

protected from dehydration.

G. Sod is to be laid tight with no open joints visible and not

overlapping, with staggered end joints of a minimum of 12 inches.

H. Where sod is used on slopes 3:1 or steeper, along stream banks,

and/or along ditch linings; sod is to be laid perpendicular to the

slope and every row secured with pegs at a minimum of 5 feet on

center.

I. Sod shall be watered properly and immediately after installation,

saturating the sod and the topsoil layers.

10-3.6. Planting of Trees, Shrubs, and Groundcover

A. All planting shall be performed by a licensed Contractor

familiar with the accepted Horticulture and Arboriculture practices.

B. No digging or planting operations shall be conducted when the

soil or plants are excessively wet, muddy, or in a frozen condition.

C. When considered advisable and in keeping with proper

horticultural procedures, a request may be made to delay

installation until favorable conditions occur.

D. Existing plants remaining on the site shall be protected from

soil compaction and other damages during the planting operations.

E. Planting pits shall be excavated to in such a way as to alleviate

glazing and loosen any hard subsoil in the bottom of pit.

F. Mechanical "Tree Spade" transplanting equipment and augers

may be used to dig and install plants. However provisions shall be

made to assure natural subsurface water circulation, surface water

circulation and surface water absorption.

G. B&B and container-grown plants shall be handled and moved

only by the ball or container. Plants shall be set plumb and held in

position until sufficient soil has been placed around roots or ball.

Plants shall be set in relation to surrounding grade so that they are

even with the depth as which they were grown.

H. All plants shall be planted in soil mixture as specified and

backfilled properly to eliminate voids and air pockets.

I. Containers, Burlap and tying materials shall be carefully

removed

10-3.7 Mulching and Weed Removal:

A. The mulched bed outline shall be continuous and cut vertically

B. Any undesired vegetation or weeds within the bed shall be

removed (roots included) prior to mulching.

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C. Mulch for planting beds shall be installed to a minimum depth

of three inches (3") in all areas specified.

D. Mulch shall be kept out of the crowns of shrubs and off

buildings, sidewalks, and other structures.

E. The top of all areas of mulch shall be even to 1" below the top

of adjacent curb, walk or edge of pavement.

10-3.8 Pruning:

A. Plant materials shall be pruned following planting operations to

remove broken or damaged branches.

B. Damaged or otherwise excessively damaged and improperly

pruned plants shall be cause for rejection.

10-3.9 Completion and Acceptance

A. Constant care should be exercised to maintain a safe and clean

work site.

B. The landscape installer shall be responsible for the repair and

any damage to lawns, paved areas, roads, walks, curbs, or

underground utilities which may result from their work.

C. If required, any replacement plants or materials shall be subject

to all requirements previously stated in this document.

D. All work and design is subject to review and inspection by the

City’s Landscape Specialist or his designee.

Issued 10/2014 78

11. Submittal Requirements

11-1 General Layout

All roadway and public utility construction plans shall comply with the

TDOT format for roadway construction plans. Some exemptions are made

for subdivision and private development site plans as specified in the

following discussion.

11-2 Technical Specifications

Construction workmanship and quality of construction materials shall be

as specified in the latest edition of the City of Kingsport Construction

Specifications.

11-3 Standard Drawings

The Tennessee Division of Transportation Standard Roadway and

Structure Drawings manual of latest revision shall be utilized in the design

of subdivision, public, and private development unless otherwise specified

in this document.

11-4 Standard Notes

The Standard Notes of latest revision, as published in the Tennessee

Division of Transportation Design Guidelines shall be used, as they would

apply to the type of construction being specified in the plans.

11-5 Right-of-way Plans

When required, right-of-way plans shall conform to the TDOT right-of-

way plan format, as specified in the TDOT Design Guidelines.

11-6 Construction Plans

11-6.1 Organization of Plans

Sheets shall be arranged per the list in this section. The standard

symbols specified by TDOT shall be used to represent different

existing and proposed features on the plan sheets. These symbols

are shown in the front section of the TDOT Standard Roadway and

Structures Drawings manual. Each sheet that follows the cover

sheet shall be numbered in the upper right corner.

Preferred scales for the Present and Proposed Layout Sheets are

1”= 50’, 1”= 40”, or 1”= 20’, with a maximum allowable of

1”=50’. Sheet size shall be 24”x36” or 22”x34”.

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11-6.2 Cover Sheet

The construction plans shall have a cover sheet containing:

A. A project name,

B. A location map scaled to no less than 1’ = 1000 feet,

C. Subdivision, area, or institution to be served,

D. The name and address of the professional designer, or the

professional design firm,

E. Current and projected ADT, design hour volume, and

design speed,

F. The current date, and

G. The revision date, if the plans have been revised during the

review process.

H. Case number of any previous planning actions (i.e.

rezoning, variances, etc.)

11-6.3 Sheet for the List of Quantities and Tabulation Tables

Any private development and infrastructure will be exempt from

providing this sheet. Following the cover page, a sheet will be

provided which will list the estimated quantities and show

applicable footnotes associated with individual construction items.

Tables consisting of drainage structures and pipe sizes may be

included on this sheet. Other sheets may be provided when room is

insufficient on the first sheet of this section. Other construction

items, which require tabulation, shall be included in this section.

11-6.4 Standard Drawing Sheet

When TDOT standard drawings will depict construction items

being specified, a list of standard drawing numbers may be

substituted on a plan sheet following the cover sheet. If TDOT has

made a revision to the standard drawing being specified, then the

effective date of TDOT’s revision will be shown along with the

standard drawing number.

11-6.5 Details Sheet

Details, which are not included in the TDOT Standard Roadway

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and Structures Drawings notebook, shall be shown following the

list of applicable standard drawings.

11-6.6 Right-of-Way Sheet

Subdivisions and plans for private development will be exempt

from providing this sheet. When right-of-way will be acquired, a

sheet will be provided with a right-of-way index map at a scale that

will show effective detail. The corresponding tract numbers shall

be listed on each tract. If room allows, a TDOT style right-of-way

table shall be included. If necessary, the right-of-way table may be

included on a separate sheet.

11-6.7 Present Layout and Right-of-Way sheets

Subdivisions and plans for private development will be allowed to

vary some from this format. However, to preserve a degree of

compliance to a standard style, subdivision and private

development construction plans should follow this pattern as close

as possible.

Site plans for private development shall include existing contour

lines at 2-foot intervals, and if this sheet is to be a grading plan,

include the proposed contour lines at 2-foot intervals.

A plan view of the present topographic features of the area under

construction shall be shown on this sheet. If the sheet will become

cluttered with the standard topographic and proposed right-of-way

information, a second sheet may be included for the right–of-way

information.

The proposed right-of-way sheet shall conform to the style used by

TDOT. Topographic features to be shown on the present layout

sheet are not to be limited to the following, but this list is to

provide a minimum example:

1. Centerline of the proposed street with station numbers,

2. Edge of pavement, and back of curb,

3. Storm water drainage inlets and sanitary, telephone, and

electric power manholes,

4. End of pipes, centerline of storm water drainage ditches,

stream banks, and springs,

5. Water and natural gas valves,

6. Water meters, electric line pull boxes, and sanitary sewer

clean-out caps,

7. Underground utility lines such as; storm water, sanitary

sewer, natural gas, telephone / communication, electric

power, etc.,

Issued 10/2014 81

8. Electric power, telephone, cable television, street light,

traffic signal poles,

9. Buildings, sidewalks, driveways, significant trees and

planted / landscaped areas,

10. Proposed street centerline, and proposed slope lines,

11. Property information, iron pins, property lines with calls

and distances, and public and private easements,

12. Traffic and business signs.

13. FEMA flood fringe and flood way limits.

11-6.8 Proposed Layout Sheets

The proposed layout sheet shall show all new construction items

being proposed, station numbering and centerline of the proposed

street.

Additionally, horizontal curve data shall be included on this sheet.

The requirements set forth by TDOT for their proposed layout

sheets shall apply. Subdivision and site plans for private

development shall include existing and proposed contour lines at 2

foot intervals if they are not shown on a separate, existing layout

sheet.

Where applicable, identify/show the quantity of all impervious

surfaces (square footage) and FEMA flood fringe and flood way

limits.

Include site data block – provided by the City of Kingsport

Engineering Division - on the plan cover sheet. Data block

includes information for zoning, density, disturbed area,

impervious area, building size, etc.

11-6.9 Profile Sheets

A profile along the project centerline of existing ground and

proposed finished grade shall be shown on this sheet. Vertical

curve information shall be indicated on this sheet along with any

superelevation being planned for horizontal curves. The profile of

existing and proposed storm water, sanitary sewer, water, and

natural gas lines shall be shown.

11-6.10 Cross-section Sheets

Subdivision and site plans for private development are exempt

from providing cross-section sheets. All roadway plans shall

include cross-sections at 50-foot intervals along the centerline of

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the proposed street. The information shall be presented in the same

format as TDOT cross-section sheets.

11-6.11 Miscellaneous Sheets Which are Required

A. Erosion and Sediment Control Plan

B. Work Zone Traffic Control Plan

11-6.12 Miscellaneous Sheets Which May be Required

A. Detailed Intersection Geometric Layout

B. Traffic Signal Layout

C. Landscaping Plan

11-7 As-Built Plans

11-7.1 General

As-built plans are required for all permitted development. The

plans shall be prepared by a professional surveyor, and shall

accurately record the as-built location of the street and storm

drainage system.

Submit to the City of Kingsport Engineering Division two hard

copies and one digital copy (AutoCad and Adobe .pdf) of the As-

Built Drawings with a transmittal letter containing date, project

title, Developer/Owner’s name and address, list of documents, and

signature of Developer/Owner. A licensed surveyor or engineer

shall certify that the submitted As-Built Drawings accurately

portray what has been built. The As-Built Drawings shall

accurately illustrate the installed location of all utilities, roads,

storm water facilities, and any other public infrastructure. The

installed locations shall be verified by a certified survey showing

dimensions, locations, elevations, profiles, and cross-sections of

construction. All easements and Rights of Way (ROW) shall be

shown on the As-Built Drawings. The As-Built Drawings shall be

standard size plan sheets (24”x36” or 22”x34”) with a scale no

greater than 1”=50’. The digital copy shall be full scale and shall

be coordinated to the KGRN coordinate system.

Issued 10/2014 83

11-7.2 Contents

The as-built plans shall be of the same format as the construction

plans, and contain the following information:

A. Cover Sheet with an area map and project identification;

B. Plan view of the horizontal layout of the completed street:

1. Curve radii, center line bearing, street widths,

2. Street, Curb and gutter, sidewalks, handicap ramps;

3. Storm inlets, storm manholes, storm pipe end walls;

4. Ground mounted electric transformers, street light

poles;

5. Water valves, gas valves, and sanitary sewer

manholes;

6. Notes of all revisions made to the design during

construction.

C. Profile of the vertical alignment of the completed street:

1. Tangent grades, vertical curve lengths, finished

street grade;

2. Location of storm inlets and manholes;

3. The profile of storm pipes indicating their slope and

diameter;

4. The profile of water and sewer lines and their sizes;

D. A typical cross-section of the different types of streets in

the development.

E. Typical details of storm water structures, and bridges.

F. The completed detention basin, indicating its location and

volume.

G. Typical details of the detention basin outlet structure.

H. Location of special drainage easements.

I. The 100 year flood boundary and flood way limits,

J. Location and volume of sinkholes receiving storm water

from public streets,

K. Typical details of constructed sinkhole treatments, and

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L. The validated seal of the engineer that produces the as-built

plans.

M. Location of all permanent stormwater BMPs.

11-8 Review Requirements

All reports, final plans and specifications should be submitted at least 30

days prior to the date on which action by the Engineering Division is

desired. However, subdivision plans and reports are subject to the deadline

for the Kingsport Regional Planning Commission.

It is highly recommended that the developer and design consultant

schedule a pre-development meeting with the City of Kingsport to discuss

each particular project.

11-8.1 Preliminary Submittals

Submittal of partially completed plans to these offices for an

informal or preliminary review is encouraged. This can usually

reduce the number of comments transmitted to the designer during

later reviews, leading to an expedited approval of the final

construction plans.

11-8.2 Approval of Construction Plans

Approval of construction plans will be granted when the plans,

construction documents, and specifications are found to be

complete as compared to these City Design Standards,

Construction Specifications, pre-development meeting with City

staff, permits, and any other criteria specified in this document.