TABLE OF CONTENTS

 

BOOK 1

PAGE

MANUAL OF SPECIFICATIONS STANDARDS AND DESIGN

FRONT COVER SHEET

FORWARD

NOTICE OF COPYRIGHT PROTECTION

 

 

 

 

Pre-Approved Material/Product List

I

SANITARY SEWER

1

WATER DISTRIBUTION

14

 

 

standard specifications

 

 

 

00825 – PRODUCT SUBSTITUTIONS

 

1.      product substitutions

00825-1

2.      PRODUCT AND DESIGN REVIEW COMMITTEE

00825-1

 

 

00950 – MEASUREMENT & PAYMENT (CITY FUNDED PROJECTS)

 

1.1    TRENCHING, BACKFILLING AND COMPACTION OF UTILITIES

00950-1

1.2    WATER

00950-5

1.3    SEWER

00950-13

1.4    STORM DRAINAGE

00950-19

1.5    EARTHWORK

00950-21

1.6    BASE COURSE & PAVING

00950-24

1.7    CURB & GUTTER, DRIVEWAYS, SIDEWALKS, AND MISCELLANEOUS CONCRETE ITEMS

00950-29

1.8    ITEMS MISCELLANEOUS TO ALL SECTIONS

00950-33

 

 

02200 – EARTHWORK

 

PART 1 – GENERAL

 

1.1    RELATED DOCUMENTS

02200-1

1.2    SUMMARY

02200-1

1.3    DEFINITIONS

02200-2

1.4    SUBMITTALS

02200-3

1.5    TESTING SERVICES

02200-4

1.6    QUALITY ASSURANCE

02200-4

1.7    QUALITY STANDARDS

02200-4

1.8    STANDARD ABBREVIATIONS

02200-6

1.9    PROJECT CONDITIONS

02200-6

1.10  SERVICE INTERRUPTION

02200-8

1.11  COORDINATION

02200-8

1.12  PUBLIC CONVENIENCE

02200-9

1.13  TRAFFIC CONTROL

02200-8

1.14  EROSION AND SEDIMENTATION CONTROL AND NPDES MONITORING, CONTROLS,   AND LIMITATIONS FOR PERMITTED DISCHARGES

02200-9

pART 2 – PRODUCTS

 

2.1    SOIL MATERIALS

02200-12

2.2    MISCELLANEOUS

02200-13

 

PART 3 – EXECUTION

 

3.1    GENERAL

02200-13

3.2    CLEARING AND GRUBBING

02200-18

3.3    UNCLASSIFIED EXCAVATION, UNDERCUTTING, BORROW, EMBANKMENT

02200-20

3.4    ROCK

02200-23

3.5    SUBGRADE COMPACTION TESTING AND CONTROL

02200-25

3.6    SUBGRADE PREPARATION AND COMPACTION REQUIREMENTS

02200-27

3.7    STRUCTURES:  EXCAVATION, FILLING AND BACKFILLING

02200-29

3.8    RIP RAP AND RIP RAP BEDDING PLACEMENT

02200-30

3.9    PLACEMENT OF SOIL STABILIZATION FABRIC

02200-30

3.10  SUBSURFACE DRAINAGE SYSTEMS

02200-30

3.11  METHOD OF VOLUME MEASUREMENT

02200-30

3.12  CLEANUP AND RESTORATION OF SITE

02200-31

3.13  SEEDING, SODDING AND GROUNDCOVER

02200-32

3.14  MISCELLANEOUS

02200-33

 

 

02275 – TRENCHING, BACKFILLING AND COMPACTION OF UTILITIES

 

PART 1 – GENERAL

 

1.1    gENERAL

02275-1

1.2    RELATED DOCUMENTS

02275-1

1.3    SUMMARY

02275-2

1.4    DEFINITIONS

02275-2

1.5    SUBMITTALS

02275-5

1.6    QUALITY ASSURANCE

02275-6

1.7    QUALITY STANDARDS

02275-6

1.8    TESTING SERVICES

02275-9

1.9    pROJECT CONDITIONS

02275-9

1.10  SERVICE INTERRUPTION

02275-10

1.11  COORDINATION

02275-10

1.12  PUBLIC CONVENIENCE

02275-11

1.13  TRAFFIC CONTROL

02275-11

1.14  EROSION AND SEDIMENTATION CONTROL AND NPDES MONITORING, CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES

02275-12

PART 2 – PRODUCTS

 

2.1    SOIL, BEDDING AND BACKFILL

02275-14

2.2    MISCELLANEOUS

02275-17

PART 3 – EXECUTION

 

3.1    PREPARATION

02275-18

3.2    TRENCH EXCAVATION

02275-26

3.3    BEDDING

02275-36

3.4    BACKFILLING (MATERIALS AND METHODS)

02275-37

3.5    COMPACTION/DENSITY

02275-40

3.6    SERVICE CUTS, DIRECTIONAL BORED OR PUNCHED SERVICES

02275-43

3.7    PAVEMENT REPAIR AND REPLACEMENT

02275-43

3.8    BLASTING

02275-44

3.9    HIGHWAY CROSSING

02275-47

3.10  RAILROAD CROSSING/TRACKS

02275-47

3.11  UNDERGROUND RIVER OR CREEK CROSSINGS

02275-48

3.12  SURFACE/SUBSURFACE WATER CROSSINGS

02275-49

3.13  CONCRETE COLLARS ON SEWER MAINS

02275-49

3.14  PLACEMENT OF RIP RAP AND RIP RAP BEDDING

02275-49

3.15  CLEANUP AND RESTORATION OF SITE

02275-49

3.16  SEEDING & GROUNDCOVER

02275-50

3.17  MISCELLANEOUS

02275-51

 

 

02400 – CURB & GUTTER, DRIVEWAYS & SIDEWALKS

 

PART 1 – GENERAL

 

1.1    RELATED DOCUMENTS

02400-1

1.2    SUMMARY

02400-1

1.3    DEFINITIONS

02400-1

1.4    SUBMITTALS

02400-2

1.5    QUALITY ASSURANCE

02400-2

1.6    STANDARD ABBREVIATIONS

02400-4

1.7    PRODUCT DELIVERY, STORAGE AND HANDLING

02400-5

1.8    PROJECT CONDITIONS

02400-5

1.9    COORDINATION

02400-6

PART 2 – PRODUCTS

 

2.1    MISCELLANEOUS

02400-6

PART 3 – EXECUTION

 

3.1    CONSTRUCTION – ALL CONCRETE ITEMS

02400-9

3.2    STANDARD CONCRETE CURB AND GUTTER

02400-14

3.3    STANDARD PORTLAND CEMENT CONCRETE SIDEWALK AND DRIVEWAY ENTRANCES

02400-17

3.4    PORTLAND CEMENT CONCRETE RETAINING WALLS, HEADWALLS, STEPS, PIERS FOR STREAM CROSSINGS, FLUMES AND DITCHES, MEDIAN BARRIERS, MEDIAN STRIPS, ISLAND, ETC.

02400-19

3.5    CONSTRUCTION METHODS FOR BRICK SIDEWALKS

02400-20

3.6    DECORATIVE (STAMPED OR TINTED) CONCRETE OR BRICK PAVED WALKS, DRIVES AND PAVEMENTS

02400-21

 

 

02510 – WATER DISTRIBUTION

 

PART 1 – GENERAL

 

1.1    RELATED DOCUMENTS

02510-1

1.2    SUMMARY

02510-2

1.3    DEFINITIONS

02510-2

1.4    SUBMITTALS

02510-3

1.5    QUALITY ASSURANCE

02510-3

1.6    QUALITY STANDARDS

02510-4

1.7    PRODUCT DELIVERY, STORAGE AND HANDLING

02510-5

1.8    PRODUCT SUBSTITUTIONS

02510-6

1.9    PRODUCT CONDITIONS

02510-6

1.10  CROSS-CONNECTION CONTROL

02510-9

1.11  SERVICE INTERRUPTION

02510-9

1.12  COORDINATION

02510-9

PART 2 – PRODUCTS

 

2.1    PIPE AND FITTINGS

02510-10

2.2    VALVES AND FIRE HYDRANTS

02510-19

2.3    MISCELLANEOUS APPURTENANCES

02510-28

PART 3 – EXECUTION

 

3.1    INSTALLATION – PIPE AND FITTINGS

02510-35

3.2    VALVES AND FIRE HYDRANTS

02510-48

3.3    MISCELLANEOUS APPURTENANCES

02510-52

3.4    TESTING AND DISINFECTION

02510-56

3.5    FINAL ACCEPTANCE

02510-64

 

 

02530 – SANITARY SEWER

 

PART 1 – GENERAL

 

1.1    RELATED DOCUMENTS

02530-1

1.2    SUMMARY

02530-2

1.3    DEFINITIONS

02530-2

1.4    PERFORMANCE

02530-3

1.5    SUBMITTALS

02530-3

1.6    QUALITY ASSURANCE

02530-4

1.7    QUALITY STANDARDS

02530-5

1.8    PRODUCT DELIVERY, STORAGE AND HANDLING

02530-6

1.9    PRODUCT SUBSTITUTIONS

02530-7

1.10  PROJECT CONDITIONS

02530-7

1.11  sERVICE INTERRUPTION

02530-10

1.12  COORDINATION

02530-10

PART 2 – PRODUCTS

 

2.1    PIPE & FITTINGS

02530-11

2.2    MISCELLANEOUS APPURTENANCES AND MATERIAL

02530-22

PART 3 – EXECUTION

 

3.1    PIPE AND FITTINGS

02530-30

3.2    TUNNELING METHOD

02530-37

3.3    MANHOLE CONSTRUCTION

02530-39

3.4    ABANDONING SEWER LINE & MANHOLES

02530-41

3.5    CONNECTION TO EXISTING SEWERS

02530-41

3.6    BYPASS PUMPING

02530-42

3.7    SERVICE CONNECTIONS

02530-44

3.8    CONCRETE ENCASEMENTS

02530-46

       3.9    TESTING

02530-46

3.10  PUMP STATIONS AND FORCE MAINS

02530-56

3.11  PIPE DESIGN LIFE

02530-62

3.12  CLEANUP AND RESTORATION OF SITE

02530-62

 

 

02630 – STORM DRAINAGE

 

PART 1 – GENERAL

 

1.1    GENERAL

02630-1

1.2    RELATED DOCUMENTS

02630-1

1.3    SUMMARY

02630-2

1.4    DEFINITIONS

02630-2

1.5    SUBMITTALS

02630-2

1.6    QUALITY ASSURANCE

02630-3

1.7    QUALITY STANDARDS

02630-3

1.8    PRODUCT DELIVERY, STORAGE AND HANDLING

02630-6

1.9    PROJECT CONDITIONS

02630-7

1.10  SERVICE INTERRUPTION

02630-7

1.11  COORDINATION

02630-7

1.12  PUBLIC CONVENIENCE

02630-8

1.13  TRAFFIC CONTROL

02630-8

1.14  EROSION AND SEDIMENTATION CONTROL AND NPDES MONITORING, CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES

02639-9

PART 2 – PRODUCTS

 

2.1    PIPE & FITTINGS

02630-9

2.2    MISCELLANEOUS APPURTENANCES

02630-10

PART 3 – EXECUTION

 

3.1    PIPE INSTALLATION – GENERAL

02630-14

3.2    MANHOLE CONSTRUCTION FOR PRECAST STANDARD MANHOLES AND DROP INLET BASES

02630-19

3.3    PRECAST REINFORCED CONCRETE STORM DRAINAGE BOX STRUCTURES (Flush Wall, Waffle and Knockout Panel Type):

02630-20

3.4    MASONRY STRUCTURES

02630-21

3.5    NCDOT STANDARD DETAILS

02630-22

3.6    CONSTRUCTION OF MISCELLANEOUS APPURTENANCES

02630-23

3.7    ABANDONING STORM DRAINAGE LINES & MANHOLES

02630-23

3.8    SLOPE ANCHORS

02630-23

3.9    EXCAVATION OF DRAINAGE CHANNELS

02630-24

3.10  PLACEMENT OF RIP RAP AND RIP RAP BEDDING

02630-24

3.11  SUBSURFACE DRAINAGE

02630-24

3.12  INSPECTION

02630-24

3.13  MAINTENANCE

02630-25

3.14  MEASUREMENT & PAYMENT

02630-26

 

 

02632 – SEGMENTAL CONCRETE RETAINING WALL SYSTEM

 

PART 1 – GENERAL

 

1.1    DESCRIPTION

02632-1

1.2    RELATED DOCUMENTS

02632-1

1.3    REFERENCE STANDARDS

02632-1

1.4    DESIGN REQUIREMENTS

02632-3

1.5    SUBMITTALS

1.6    DELIVERY, STORAGE AND HANDLING

02632-4

02632-4

PART 2 – PRODUCTS

 

2.1    DEFINITIONS

02632-4

2.2    SEGMENTAL CONCRETE UNITS SHALL MEET THE FOLLOWING REQUIREMENTS

02632-5

2.3    SOIL REINFORCEMENT

02632-6

2.4    UNIT DRAINAGE FILL

02632-7

2.5    SUBDRAIN

02632-7

2.6    REINFORCED BACKFILL

02632-7

2.7    BASE LEVELING PAD

02632-8

PART 3 – CONSTRUCTION

 

3.1    GENERAL

02632-8

3.2    FOUNDATION SOIL PREPARATION

02632-9

3.3    LEVELING PAD

02632-9

3.4    UNIT INSTALLATION

02632-9

3.5    SUBDRAIN

02632-9

3.6    BACKFILL PLACEMENT

02632-9

3.7    GEOGRID INSTALLATION

02632-10

3.8    FIELD QUALITY CONTROL AND ASSURANCE

02632-10

3.9    CLEANUP AND RESTORATION OF SITE

02632-11

 

 

02740 – BASE COURSE AND PAVING

 

PART 1 – GENERAL

 

1.1    RELATED DOCUMENTS

02740-1

1.2    SUMMARY

02740-1

1.3    DEFINITIONS

02740-1

1.4    SUBMITTALS

02740-2

1.5    QUALITY ASSURANCE

02740-3

1.6    STANDARD ABBREVIATIONS

02740-4

1.7    PRODUCT DELIVERY, STORAGE AND HANDLING

02740-5

1.8    COORDINATION

02740-5

PART 2 - PRODUCTS

 

2.1    AGGREGATE BASE COURSE

02740-6

2.2    ASPHALT SURFACE TREATMENT

02740-6

2.3    ASPHALT TACK COAT

02740-6

2.4    BITUMINOUS CONCRETE PAVEMENTS

02740-6

2.5    CEMENT TREATED BASE COURSE

02740-6

2.6    COLD PATCH

02740-6

2.7    LIME-TREATED SOIL

02740-7

2.8    PRIME COAT

02740-7

PART 3 – EXECUTION

 

3.1    GENERAL

02740-7

3.2    PAVEMENT, PATCHES, REPAIR AND REPLACEMENT

02740-7

3.3    AGGREGATE BASE COURSE (ABC)

02740-9

3.4    CEMENT TREATED STABILIZATION

02740-10

3.5    LIME-TREATED SOIL

02740-11

3.6    BITUMINOUS CONCRETE PAVEMENT

02740-11

3.7    TACK COAT

02740-19

3.8    ASPHALT SURFACE TREATMENT

02740-19

3.9    PREPARATION OF PAVEMENT FO RESURFACING

02740-19

3.10  PROTECTION OF ASPHALTIC SURFACE COURSE

02740-20

3.11  PAVEMENT MARKINGS

02740-20

 

 

02920 – SEEDING, SODDING AND GROUNDCOVER

 

PART 1

 

1.1    RELATED DOCUMENTS

02920-1

1.2    SUMMARY

02920-1

1.3    DEFINITIONS

02920-1

1.4    SUBMITTALS

02920-2

1.5    QUALITY ASSURANCE

02920-2

1.6    QUALITY STANDARDS

02920-2

1.7    STANDARD ABBREVIATIONS

02920-3

1.8    PRODUCT DELIVERY, STORAGE AND HANDLING

02920-3

1.9    PROJECT COORDINATION

02920-3

1.10  SERVICE INTERRUPTION

02920-4

1.11  LOCATING SERVICES

02920-4

1.12  COORDINATION

02920-4

1.13  WARRANTY

02920-4

PART 2 – PRODUCTS

 

2.1    MISCELLANEOUS

02920-4

PART 3 – EXECUTION

 

3.1    CONSTRUCTION OF SUBGRADE

02920-5

3.2    SEEDING, SODDING AND GROUNDCOVER

02920-6

3.3    CLEANUP

02920-10

350.01     SEEDING SPECIFICATIONS

-

 

 

BOOK 2

 

INTRODUCTION TO DESIGN AIDS

 

 

 

PLAN REVIEW, PERMITTING, CONSTRUCTION & ACCEPTANCE

 

SECTION 1 – INTRODUCTION

1

SECTION 2 – LAND DISTURBANCE PERMIT

 

2.1    FIRST SUBMITTAL

2

2.2    SECOND AND FOLLOWING SUBMITTALS

2

2.3    AFTER ALL ASSOCIATED COMMENTS HAVE BEEN ADDRESSED

3

         LAND DISTURBANCE PERMIT FLOWCHART

4

SECTION 3 – CONSTRUCTION PLAN APPROVAL

 

3.1    FIST SUBMITTAL

5

SECTION 4 – CONSTRUCTION

 

4.1    CONSTRUCTION PROCESS

5

         CONSTRUCTION PROCESS FLOWCHART

7

4.2    ACCEPTANCE OF UTILITIES, STREETS AND BMP (If Applicable)

8

SECTION 5 – ACCEPTANCE (SUBDIVISIONS)

 

5.1    PHASE DEVELOPMENT WALKTHROUGH

8

5.2    WARRANTY PERIOD

9

5.3    WARRANTY WALKTHROUGH

10

5.4    WARRANTY REQUIREMENTS

10

SECTION 6 – SPECIFIC INFORMATION REGARDING RECORD DRAWINGS

11

APPENDIX A – ENGINEERING DEPARTMENT STANDARD GENERAL NOTES

13

STANDARD EROSION CONTROL NOTES

16

APPENDIX B – LIST OF REQUIRED FORMS

17

APPENDIX C – CHECKLIST & INSPECTION FORMS

18

CONSTRUCTION PLAN CHECKLIST

22

SITE PLAN FOR CO

24

STORM DRAIN CHECKLIST

26

STREETS CHECKLIST

27

WATER INSPECTION PROCESS

28

SEWER INSPECTION PROCESS

29

 

 

MUNICIPAL STREET DESIGN

 

SECTION 1 – INTRODUCTION STREETS

1

1.1    CITY OF WILSON CITY ENGINEER

2

1.2    CITY OF WILSON PAVEMENT POLICY

2

1.3    ACKNOWLEDGEMENTS

2

SECTION 2 – STREET/SUBDIVISION DESIGN

 

2.1    SUBDIVISION STREETS

3

2.2    HORIZONTAL ALIGNMENT

5

2.3    VERTICAL ALIGNMENT

13

2.4    STREET SECTION & TYPES

15

2.5    STREET DRAINAGE

16

2.6    SIDEWALKS AND DRIVEWAYS

17

2.7    STREET NAMES AND STREET NAME SIGNS

19

2.8    TRAFFIC CALMING GUIDELINES

19

2.9    TRAFFIC IMPACT ANALYSIS

23

 

SECTION 3 – PAVEMENT DESIGN

 

3.1    PAVEMENT DESIGN

29

3.2    PAVEMENT DESIGN PROCEDURE

3.3    EXAMPLE OF PAVEMENT DESIGN – METHOD 1

3.4    EXAMPLE OF PAVEMENT DESIGN – METHOD 2

30

41

42

SECTION 4 – SUBGRADE PREPARATION AND TESTING

 

4.1    SUBGRADE INSPECTION – CONFIRM CBR TESTS

47

4.2    SUBGRADE INSPECTION – DENSITY TESTS

47

4.3    SUBGRADE INSPECTION – PROOFROLLING

47

SECTION 5 – STREET INSPECTIONS

 

5.1    INSPECTIONS

49

5.2    TESTING

50

5.3    SETUP PERIOD

51

5.4    MAINTENANCE

52

5.5    WARRANTY

52

SECTION 6 – WARRANTY & ACCEPTANCE

 

6.1    GENERAL REQUIREMENTS

53

6.2    INSPECTIONS

53

6.3    MAINTENANCE

54

6.4    WARRANTY/REPAIRS PERFORMANCE GUARANTEE

54

6.5    UTILITY CUTS

54

SECTION 7 – BIBLIOGRAPHY

56

APPENDIX A – FLEXIBLE PAVEMENT DESIGN SPREADSHEETS

57

 

 

SEGMENTAL RETAINING WALL DESIGN

 

SECTION 1 – INTRODUCTION – SRW

1

1.1    CITY OF WILSON CITY ENGINEER OR STORMWATER PROGRAM MANAGER

2

SECTION 2 – SEGMENTAL RETAINING WALL DESIGN

 

2.1    RELATED DOCUMENTS

3

2.2    DEFINITIONS

3

2.3    WALL DESIGN ENGINEER

4

2.4    MINIMUM DESIGN REQUIREMENTS – GENERAL

4

2.5    WALLS USED FOR RETENTION/DETENTION BASINS

8

2.6    WALLS USED FOR STREAM OR CHANNEL LINERS

9

2.7    PEDESTRIAN BARRIER/HANDRAILS

9

SECTION 3 – BIBLIOGRAPHY

10

SECTION 4 – APPENDIX OF TABLES

 

TABLE A.1

11

TABLE A.2

11

TABLE A.3

11

TABLE A.4

12

 

 

WATER & SEWER DESIGN

 

SECTION 1 – GENERAL

1

1.1    GENERAL

2

SECTION 2 – WATER TRANSMISSION AND DISTRIBUTION FACILITIES

 

2.1    DESIGN STANDARDS

5

SECTION 3 – GRAVITY SANITARY SEWER

 

3.1    GRAVITY COLLECTION SYSTEM DESIGN STANDARDS

20

SECTION 4 – SANITARY SEWER PUMP STATIONS

 

4.1    PUMP STATIONS

37

SECTION 5 – WATER AND SEWER INSPECTIONS

 

5.1    INSPECTION AND TESTING

5.2    MAINTENANCE

5.3    WARRANTY

49

49

49

SECTION 6 – WARRANTY & ACCEPTANCE

6.1    GENERAL REQUIREMENTS

6.2    INSPECTIONS

6.3    NEW WATER AND SEWER MAINS AND SERVICES

6.4    WARRANTY/REPAIRS PERFORMANCE GUARANTEE

6.5    UTILITY CUTS

 

 

50

50

51

51

51

 

 

 

 

STORMWATER DESIGN MANUAL

 

SECTION 1 – INTRODUCTION & GENERAL GUIDELINES

1

1.1    INTRODUCTION AND PURPOSE

1

1.2    DISCLAIMER

2

1.3    COMPLIANCE

2

1.4    CITY ENGINEER

2

1.5    CITY OF WILSON STORMWATER MANAGEMENT

2

1.6    PERMITS

3

1.7    WETLANDS, WATERSHEDS, BUFFERS

3

1.8    EROSION AND SEDIMENTATION CONTROL AND NPDES MONITORING, CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES

3

1.9    EASEMENTS

6

SECTION 2 – HYDROLOGIC ANALYSIS

 

2.1    GENERAL PRINCIPALS OF STORMWATER

9

2.2    PERFORMANCE CRITERIA

11

2.3    HYDROLOGIC DESIGN

11

2.4    DETERMINATION OF RUNOFF – HYDROLOGIC METHODOLOGY

12

SECTION 3 – PIPE GEOMETRIC DESIGN & MATERIALS

 

3.1    CITY OF WILSON STORM DRAINAGE PIPE CRITERIA

19

3.2    PIPE SIZE

19

3.3    PIPE MATERIAL – APPLICATIONS

19

3.4    PIPE GRADE

19

3.5    ENERGY LOSSES

21

3.6    PIPE ALIGNMENT

23

3.7    STRUCTURE PLACEMENT REQUIREMENTS

24

3.8    PIPE TERMINAL ENDS

25

3.9    PIPE CAMBER IN ROADWAY FILL EMBANKMENTS

25

3.10  COVER

25

3.11  STRUCTURES IN RELATION TO STREAM/FLOODPLAINS

26

SECTION 4 – CULVERT DESIGN

 

4.1    INTRODUCTION

27

4.2    PIPE CULVERT DESIGN – GENERAL

27

4.3    ROADWAY DRAINAGE SYSTEM

27

4.4    DESIGN FREQUENCY

27

4.5    HYDRAULIC DESIGN OF CULVERTS

28

4.6    CURB INLET DESIGN

29

4.7    EROSION CONTROL

30

SECTION 5 – OPEN CHANNEL DESIGN

 

5.1    INTRODUCTION

31

5.2    OPEN CHANNEL DESIGN

32

SECTION 6 – STORMWATER MANAGEMENT DESIGN

 

6.1    INTRODUCTION & OBJECTIVE

37

6.2    GENERAL PROCEDURES

37

6.3    NEUSE BUFFER REGULATIONS

43

6.4    WATER SUPPLY/WATERSHED PROTECTION REGULATIONS

52

SECTION 7 – BEST MANAGEMENT PRACTICES (BMP’S)

 

7.1    INTRODUCTION

55

7.2    BMP MEASURES USED BY CITY OF WILSON

56

7.3    OTHER FAVORABLE BMP MEASURES

56

7.4    LOW IMPACT DEVELOPMENT (LID)

57

7.5    DETAILS

58

SECTION 8 – INSPECTION & ACCEPTANCE

59

8.1    LIMITS OF PUBLIC OWNERSHIP AND MAINTENANCE RESPONSIBILITY

 

8.2    LIMITATION OF CONSEQUENTIAL DAMAGE TO PRIVATE FACILITIES LOCATED ON PUBLIC EASEMENTS

59

59

8.3    ITEMS NEEDED FOR ACCEPTANCE

59

8.4    INSPECTIONS

60

8.5    WARRANTY

60

8.6    BEST MANAGEMENT PRACTICES

61

SECTION 9 – FINANCIAL

62

9.1    NEW SUBDIVISION AND NEW CONSTRUCTION EXCLUDED

62

9.2    PRIVATE PROPERTY – OTHER THAN NEW SUBDIVISIONS

9.3    POLICY OF CITY PARTICIPATION IN PIPING OF OPEN DITCHES

63

63

SECTION 10 – EXAMPLE PROBLEMS

64

10.1    CALCULATING RUNOFF – RATIONAL METHOD

10.2    CALCULATING RUNOFF – SCS METHOD

10.3    CULVERT DESIGN

10.4    CURB INLET DESIGN – GUTTER SPREAD

10.5    OPEN CHANNEL DESIGN

10.6    APPORTIONING METHOD FOR CHANGING NITROGEN LOADING FOR SITES WITH

           EXISTING IMPERVIOUS AREA

64

71

73

84

88

 

100

SECTION 11 – REFERENCES

 

103

TABLE OF APPENDICES

 

Appendix A:    Stormwater Management Plan Permit Application

 

Appendix B:    Example Stormwater Management Statement

 

Appendix C:   Example Stormwater Operation and Maintenance Agreement

 

Appendix D:   Example Inspections and Maintenance Plans

 

Appendix E:    Total Nitrogen Loading Calculations

 

Appendix F:    Stormwater Management Annual BMP Certification

 

Appendix G:   Stormwater Management Checklist

Appendix H.    Stormwater BMP Supplement Forms

Appendix I.      Stormwater BMP Monthly Inspection Forms

Appendix J.     Stormwater BMP Details

 

Appendix K.     Piping Policy

 

 

 

TABLE OF FIGURES

 

Figure 2.1:      The Hydrologic cycle as illustrated by USGS

10

Figure 2.2:     Hydrologic Cycle with Increases in Impervious Surface illustrated by NEMO

10

Figure 2.3:     I-D-F Curve

15

Figure 6.1:     Total Nitrogen Export from Right-of-Way

47

Figure 6.2:     Total Nitrogen Export from Lots

48

Figure 10.1     Nomograph for Time of Concentration

68

Figure 10.2     Determination of Runoff Volume Using SCS Curve Number

72

Figure 10.3.1  Hydraulic elements of Pressure Flow Through Culverts

76

Figure 10.3.2  Culvert Design Form

80

Figure 10.3.3  Critical Depth for Circular Pipe

81

Figure 10.3.4  Headwater Depth for Circular Concrete Pipe Culverts w/Inlet Control

81

Figure 10.3.5  Head for Circular Concrete Pipe Culverts Flowing Full

83

Figure 10.4.1  Flow in Triangular Gutter Sections

85

Figure 10.4.2  Flow in Modified Triangular Gutter Sections

86

Figure 10.4.3  Catch Basin Design Data Sheet

87

Figure 10.5.1  Typical Trapezoidal Channel

92

Figure 10.5.2  Nomograph for Solution of Manning Equation

94

Figure 10.5.3  Solution of Manning’s Equation for Trapezoidal Channels

95

Figure 10.5.4  Channel Geometries for V-Shape, Parabolic and Trapezoidal Channels

96

 

 

Figure 10.5.5  Maximum Allowable Velocities for Vegetated Channels

97

Figure 10.5.6  Manning’s n Related to Velocity, Hydraulic Radius and Retardance

Figure 10.5.7  Retardance Classification for Vegetal Covers

98

99

 

 

TABLE OF TABLES

 

Table 1.1       Minimum Monitoring Requirements

5

Table 1.2       Drainage Easement Widths for CulvertsError! Bookmark not defined.

7

Table 2.1       Design and Check Storms

12

Table 2.2       Point Precipitation Frequency Estimates From NOAA Atlas 14  Smithfield, North              Carolina (31-7994) 35.5164 N 78.3458 W 164 feet

14

Table 2.3       I-D-F Table

15

Table 2.4       City of Wilson Runoff Coefficients for Various SurfacesError! Bookmark not defined.

16

Table 2.5       Values of SCS Curve Number for Rural Areas

17

Table 2.6       Values of SCS Curve Number for Urban and Suburban Areas

18

Table 3.1       Allowable Materials and Conditions of Use

19

Table 3.21      Minimal Pipe Slopes

20

Table 3.3a     Minimum Structure Invert Drop

21

Table 3.3b     Inlet Coefficients  Outlet Control, full or partly Full Entrance Head Loss

22

Table 3.3c     Head Loss Coefficients

23

Table 3.4       Maximum Pipe Run Length Between Structures

24

Table 3.5       Maximum Cover Depths

26

Table 4.6       Recommended Clogging Factors in Sump Condition  

30

Table 5.1       Flow Design Velocities for Newly Vegetated and Armored Channels

33

Table 5.2       Ditch Liners

34

Table 6.1       Method 1 for Residential Development when Impervious Surfaces Not Shown

41

Table 6.2       Residential/Non-residential Developments where Impervious Surfaces Shown

47

Table 6.3       Nitrogen Export Reduction Options

49

Table 6.4       Impervious Area Limits

50

Table 6.5       Impervious Area Limits

52

Table 7.1       BMP Devices

56

Table 10.3     Entrance Loss Coefficients for Concrete Pipe Culverts

75

Table 10.5.1  Manning Roughness Coefficient for Excavated or Dredged Channels

89

Table 10.5.2. Manning Roughness Coefficient for Lined r Built-Up Channels

89

Table 10.5.3  Manning Roughness Coefficient for Minor Natural Streams

89

Table 10.5.4  Manning Roughness Coefficient for Major Natural Streams

90

Table 10.5.5  Manning Roughness Coefficient for Flood Plains

90

Table 10.5.6  Manning Roughness Coefficient for Improved Channels

93

Table 10.6     Nutrient Calculations for Redevelop Site w/ Ex. Impervous Area

100

 

 

CITY OF WILSON – POLICIES:  pUBLIC sERVICES - eNGINEERING

Backfilling, Compaction and Patching Policy on Existing Pavements

Detail C01.03 – Pavement Surface Repair

Driveway Connection Policy

Residential Driveway Permit

Non-Residential Driveway Permit

Right of Way Regulations and Procedures

Table of Contents

Introduction

Major Encroachment Permits

Minor Encroachment Permits

Blanket Maintenance Encroachments

Terms & Conditions (Minor Encroachments)…………………………………….Exhibit A

Terms & Conditions (Major Encroachments)…………………………………….Exhibit B

Traffic Control Devices Rental Form………………………………………………Exhibit C

Minor Encroachment Permit Form ………………………………………………..Exhibit D    

Major Encroachment Permit Form ………………………………………………..Exhibit E

Blanket Encroachment Permit Form ……………………………………………...Exhibit F

Backflow Prevention Cross Connection Control

 

 

 

 

 

 

 

BOOK 3

 

TABLE OF DETAILS

Detail Number

Title

 

Common Details

C01.01

Detail of Rock Excavation

C01.02

Unsuitable Subgrade Trench Detail Type A (Sewer & Storm Drainage)

C01.03

Pavement Surface Repair

C01.04

Minimum Separation of Utilities and Other Features

C05.01

Structure Protection Unfinished Road Grade

C06.01

Standard Manhole Frame & Cover

C06.02

Blank

C06.03

Standard Manhole Ring and Cover Grade Adjustment (2 Sheets)

C06.04

Manhole Adjusting Ring (Resurfacing Applications Only)

C06.05

Valve Box Adjusting Ring (Resurfacing Applications Only)

C06.06

Polypropylene Plastic Step

C07.01

Typical Residential Utility Location

C07.02

Blank

C07.03

Typical Detail for Bore Under Paved Roads / Highways (2 Sheets)

C07.04

Standard Stream/Creek Crossing (Steel Encasement)

C07.05

Standard Stream/Creek Crossing (Concrete Encasement)

C08.01

C08.02

Standard Plan Sheet Layout For Construction Plans Requirements (2 Sheets)

Standard Plan Sheet Layout For Site and Preliminary Plans

 

 

 

Landscape Details

350.01

Seeding Specifications

 

 

 

Erosion & Sedimentation Control Details

351.01

351.02

352.01

352.02

352.03

352.03

352.04

352.05

352.06

353.01

353.02

353.03

353.04

353.05

353.06

353.07

353.08

354.01

354.02

355.01

355.02

355.03

355.04

356.01

356.02

356.03

356.04

356.05

357.01

358.01

 

Typical Silt Fence (2 Sheets)

Typical Silt Fence Outlet Relief Point

Skimmer Detail

General Notes – Sediment Basins

Skimmer Sediment Basins (Under 10 Acres) – (2 Sheets)

Skimmer Sediment Basins (Over 10 Acres) – (2 Sheets)

Rip Rap / Gravel Temporary Sediment Trap (2 Sheets)

Block & Gravel Inlet Protection (2 Sheets)

Baffle Detail (2 Sheets)

Stabilizing Channels (2 Sheets)

Detail for Stabilizing Channels (3 Sheets)

Detail for Stabilizing Slopes (3 Sheets)

Earth Berm Diversion Detail

Temporary Fill Diversion Detail

Diversion Construction Specifications Detail

Compost Blanket Detail and Notes

Rip-Rap Lined Channels for the Conveyance of Stormwater

Check Dam Detail (2 Sheets)

Check Dam with Weir Detail (2 Sheets)

Pipe Inlet Protection

Blank

(Rock) Pipe Inlet Protection (2 Sheets)

Standard Inlet / Basin Sediment Control Device

Stabilized Construction Entrance Detail

Standard Residential Construction Entrance

Standard Construction Exit Wash Rack

Temporary Stream Crossing (Pipe Culverts) (2 Sheets)

Temporary Stream Crossing (Bridgemat) (2 Sheets)

Surface Roughening by Tracking

Pipe Slope Drain Detail

 

 

 

Street Details

401.01

Typical Street Cross Section (Curb and Gutter Applications) (3 Sheets)

401.02

Temporary Turn-A-Round Dimensions

401.03

Blank

401.04

Cul-De-Sac Dimensions

402.01

Concrete Curb, Gutter and Curb with Gutter

402.02

Std. Transition from Inlet to Std. C&G / Roll Type Gutter

402.03

Typical Valley Gutter Detail & Driveways

403.01

403.02

403.03

Blank

Blank

Blank

403.04

Typical City C & G Divided Street Connection

403.05

Typical City C & G Street Connection to City or NCDOT Shoulder Section

403.06

Intersection Sight Distance Diagram (Intersection of 2 City Streets)

403.07

Blank

403.08

Left Turn Prohibition Channelization Detail

403.09

Recommended Treatment for Turn Lanes (2 Sheets)

404.01

Residential Driveway Connection (2 Sheets)

404.02

Commercial Driveway Connection

404.03

Typical Concrete Sidewalk and Expansion Joint Detail

404.04

Tree Well Opening in Facedown Sidewalk

405.01

Typical Wheelchair Ramp – Type 1 (2 Sheets)

406.01

Typical Masonry Retaining Wall (3 Sheets)

406.02

Segmental Retaining Walls in Right of Ways (3 Sheets)

406.03

Segmental Retaining Walls in Right of Ways (3 Sheets)

407.01

14’ Speed Hump Installation Detail (2 Sheets)

407.02

Speed Table Installation Detail (2 Sheets)

407.03

Traffic Calming Median Slow Point (2 Sheets)

407.04

Blank

407.05

Traffic Calming Choker Point

407.06

Speed Cushion Installation Detail (2 Sheets)

407.07

Residential Round About Std. Traffic Circle Detail

407.08

Commercial Round About Std. Traffic Circle Detail

408.01

Blank

408.02

Typical Detour Signing for Closed Street

408.03

Typical Detour Signing for Pedestrian Sidewalks

408.04

Channelizing and Warning Devices

408.05

Height and Location of Signs Typical Installation

409.01

Dumpster Site Layout

409.02

Dumpster Pad (Without Floor Plan)

409.03

Minimal Standards for Parking on Both Sides of Aisle

409.04

Blank

409.05

Bus Shelter Installation Detail (2 Sheets)

409.06

Typical Concrete Joint Locations (4 Sheets)

 

 

 

 

Water Details

511.01

Force Main & Water Main Pipe Laying Conditions

511.02

Water and Sanitary Sewer Pipe Embedment Details (3 Sheets)

512.01

Blocking Details for Horizontal Bends and Tee (2 Sheets)

512.02

Standard Anchor Block Detail

512.03

Thrust Footing Detail

512.04

The Rod Anchors Datum Chart

512.05

Concrete Thrust Collar Detail

512.06

Restraint Length Chart (For Fittings)

512.07

Vertical Offset Detail

513.01

Standard Screw Valve Box Detail

513.02

4” To 12” Std. Tapping Sleeve & Valve Assembly

513.03

Variable Level Water Main Connection

513.04

Standard Water Tap Detail (1” Thru 2” Taps)

513.05

HDPE To Dip Connection Detail

513.06

Blank

513.07

Gate Valve (16” & Larger) With Extension Rod/Valve Box

514.01

2” Blow-Off Assembly for Mains Up To 12”

514.02

Standard Hydrant Setting (Non-Paved Areas)

514.03

Standard Hydrant Setting (Curb & Gutter W/Sidewalks)

514.04

Standard Water Main Plug Detail

515.01

Standard 1” Domestic Water Meter Installation (2 Sheets)

515.02

Domestic Water Service Distribution Schematic for Gang Meter Assemblies (6 Sheets)

515.03

Standard 1 ½ “ and 2” Water Meter Assembly

515.04

3” and Larger Turbo Water Meters With Bypass (Above Ground) (2 Sheets)

516.01

Air Release Valve in Manhole (For Water Mains)

516.02

Valve Box Precast Shoulder Slab Detail

519.01

Backflow Prevention Tanker Truck (Air Gap Reduced Pressure)

519.02

¾” To 2” DCV, RPZ Assembly (Above Ground) (3 Sheets)

519.03

2 ½” To 10” DCV, DDCV, RPZ Assembly (Above Ground)  (3 Sheets)

 

 

 

Storm Drainage Details

631.01

Storm Drain Pipe Installation

631.02

Typical Drainage Channels

633.01

Blank

633.02

Typical Catch Basin and Curb Inlet With Hood (2 Sheets)

633.03

Custom Stamp On Storm Drainage Structures

633.04

Standard Catch Basin Assembly Frame and Grate

633.05

Blank

633.06

Typical Catch Basin Box In Yard Application (2 Sheets)

634.01

Typical Junction Box Detail (2 Sheets)

634.02

Drainage Structures Notes

636.01

End of Pipe Treatments

636.02

Typical Headwall, Wingwall, & Splashpad (2 Sheets)

639.01

Pipe Construction Into Box and Formed Invert Detail

639.02

Distance Between Two Holes (Openings) Formula

644.01

Stormwater Wetland

644.02

Flashboard Rise Outlet Structure

 

 

 

BMP – Best Management Practices  (To be located to SWM)

640.01

Typical Dry Detention Pond

641.01

Sizing of a Bioretention Area

641.02

Bioretention at Parking Perimeter – No Curb

641.03

Bioretention at Parking Perimeter – With Curb

641.04

Bioretention in Traffic Island

641.05

Bioretention Area Conceptual Layout

641.06

Bioretention in Off-Line Swale

642.01

Delaware Sand Filter Design (Sheet 1 of 2)

642.01

Modified Sand Filter (Silt Built) (Sheet 2 of 2)

643.01

Infiltration Basin With Settling Chamber

 

 

 

Sanitary Sewer Details

731.01

Sanitary Sewer Line Trench Detail (Non-Traffic Areas)

732.01

Typical Sewer Invert Plans for Manholes

732.02

Doghouse Manhole Installation Over Existing Sewer Main (2 Sheets)

732.03

Standard Eccentric Cone Precast Manhole Detail (Sheet 1 of 3 Street Application)

732.03

732.03

Standard Eccentric Precast Manhole Detail (Sheet 2 of 3 Field and Woods Application)

Standard Eccentric Precast Manhole Detail (Sheet 3 of 3 Field and Woods Application)

732.04

Standard Eccentric Flat Top Precast Manhole Detail (2 Sheets)

732.05

Typical Shallow Precast Manhole Detail

732.06

Standard Exterior Drop Manhole

732.07

Blank

732.08

Blank

732.09

Blank

732.10

Standard Manhole Vent Detail

732.11

Infi-Shield External Sealing Detail

733.01

Typical PVC Sewer Lateral, Cleanout, and Tap (2 Sheets)

733.02

733.03

Typical In-Line Wye (For Existing Mains)

In-Line Transition Connections For Gravity Sewer Mains

734.01

Combination Air Valve Air Release Manhole

734.02

Typical Submersible Pump Station Layout

734.03

Rainhood Detail

734.04

Riser and Electrical Diagram (2 Sheets)

734.05

Typical Emergency Pump Connection

734.06

Typical Chain Link Fence Detail – 8 Ft. Height

734.07

Blank

734.08

Above Ground Self-Priming Pump Station

735.01

Lockable Watertight Manhole Frame & Cover

736.01

Standard Concrete Piers Detail

737.01

Grease Interceptor Detail

739.01

Yard Hydrant (Non-Freeze)