2021 09 03 Elk Pasture Site Plans.pdf

PDF 17 MB Posted Mar 17, 2026

Attached to: DSCR - Elk Pasture - Dry Swale 3 Project
Solicitation number: SP470326Q0026
Issued by: Defense Logistics Agency

About this file

Written by GovTribe AI · Mar 17, 2026

Summary: Stormwater Management - Elk Pasture Construction Drawings

This is a comprehensive set of construction drawings for a stormwater management project located at Defense Supply Center Richmond (DSCR) in Chesterfield County, Virginia. The project, issued September 3, 2021, involves the installation of five dry swales designed to provide sediment and nutrient removal in accordance with Virginia Department of Environmental Quality and EPA Phase II Watershed Implementation Plan requirements. The contract number is W9123617D0017, with NAO File No. 959. The project site encompasses 26 acres in the southeast corner of DSCR, with 2.43 acres of land to be disturbed during construction. The facility is designed by the Norfolk District of the U.S. Army Corps of Engineers and represents a collaborative effort with MSA, P.C. (5032 Rouse Drive, Suite 100, Virginia Beach, VA 23462).

The construction scope includes installation of erosion and sediment control measures, clearing and grubbing, rough grading, installation of five interconnected dry swales with underdrain systems, and final site grading. Stormwater management is accomplished through gravity flow to existing storm sewer outfalls that discharge to Kingsland Creek. The project includes detailed specifications for temporary and permanent erosion control, stone construction entrances, silt fencing, tree protection, inlet protection, and seeding requirements. Construction must proceed sequentially, with only one of three elk pastures disturbed at a time, and resident elk must be relocated before disturbing subsequent pastures. Drawings include site plans, grading plans, underdrain profiles, typical cross-sections, and erosion control details across multiple sheets organized by dry swale sections and construction phases.

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Other files

File	Type	Posted
SF30 SP470326Q00260002.pdf	PDF	Apr 17, 2026
Pre-Bid site visit sign in sheet.pdf	PDF	Apr 9, 2026
SF30 SP470326Q00260001.pdf	PDF	Apr 9, 2026
Q and A SP470326Q0026.xlsx	XLSX spreadsheet	Apr 9, 2026
DSCR - Swale 3 - SOW - Rev 1.pdf	PDF	Apr 9, 2026
SF1449_SP470326Q0026.pdf	PDF	Mar 17, 2026
SOW_DSCR_Swale 3.pdf	PDF	Mar 17, 2026
Wage Determination.pdf	PDF	Mar 17, 2026

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STORMWATER MANAGEMENT - ELK PASTURE

DEFENSE SUPPLY CENTER RICHMOND (DSCR),

DEFENSE LOGISTICS AGENCY, VIRGINIA

SHEET INDEX

SHEET # SHEET TITLE

US Army Corps of Engineers ® Norfolk District

SOLICITATION NO.:

CONTRACT NO.: W9123617D0017

ISSUE DATE: 09/03/2021

NAO FILE NO.: 959

CHIEF, ENGINEERING & CONSTRUCTION DIVISION

CHIEF, ENGINEERING BRANCH

APPROVED

ENGINEERING BRANCH DESIGN LEAD

RECOMMENDED

THIS PROJECT WAS DESIGNED BY THE NORFOLK DISTRICT OF THE ARMY CORPS OF

ENGINEERS. THE INITIALS OR SIGNATURES AND REGISTRATION DESIGNATIONS OF

INDIVIDUALS APPEAR ON THESE PROJECT DOCUMENTS WITHIN THE SCOPE OF

THEIR SIGNATURES AFFIXED BY ER 110-1-8152.

SIGNATURES AFFIXED BELOW INDICATE OFFICIAL RECOMMENDATION AND

APPROVAL OF DRAWINGS IN THIS SET.

US Army Corps of Engineers ®

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COVER SHEET

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LOCATION AND VICINITY MAPS

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CIVIL LEGEND AND ABBREVIATIONS

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OVERALL EXISTING CONDITIONS

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EXISTING CONDITIONS - DRY SWALE 1 AND 2

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EXISTING CONDITIONS - DRY SWALE 3

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EXISTING CONDITIONS - DRY SWALE 4 AND 5

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EROSION AND SEDIMENT CONTROL PLAN - DRY SWALE 1 AND 2

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EROSION AND SEDIMENT CONTROL PLAN - DRY SWALE 4 AND 5

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UNDERDRAIN PROFILES - DRY SWALE 1 AND 2

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EROSION AND SEDIMENT CONTROL DETAILS

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DETAILS

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RICHMOND

NORFOLK

HAMPTONNEWPORT NEWS

SUFFOLK

PETERSBURG

CHARLOTTESVILLE

WASHINGTON

STAFFORD

PALMYRA

MANASSAS

VIRGINIA

BEACH

PROJECT LOCATION

EAST GATE

NORTH GATE

LOCATION MAP

SCALE: 1 IN. = 800 FT.

SITE LOCATION

VICINITY MAP

SCALE: 1 IN. = 200 MI

**COORDINATE CONTRACTOR, COE TRAILERS, AND PARKING AREA WITH

CONTRACTING OFFICER.

ACCESS AND HAUL ROUTES:

REMOVE FROM GOVERNMENT PROPERTY SURPLUS OR OTHER SOIL MATERIAL NOT

REQUIRED OR SUITABLE FOR FILLING OR BACKFILLING AND BRUSH, REFUSE,

STUMPS, ROOTS, AND TIMBER.

HAUL ROUTES SHALL BE AS DIRECTED BY THE CONTRACTING OFFICER.

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FIRE DEPARTMENT

BUILDING 201

SECURITY OFFICE

BUILDING 201

DEPARTMENT

BUILDING 80

PUBLIC WORKS

EXIT 67B

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JAMES RIVER

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DALEBROOK DR

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GRAPHIC SCALE 1"=800'

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ABBREVIATIONS

6"AC SIZE/ASPHALT CURB

6"CC SIZE/CONCRETE CURB

30"C&G SIZE/CURB & GUTTER

B BASELINE

BOR# SOIL BORING

BOS BOTTOM OF STRUCTURE

BW BOTTOM OF WALL

C CENTERLINE

C CONCRETE

CDI CURB DRAINAGE INLET

CLF CHAIN LINK FENCE

CMP CORRUGATED METAL PIPE

CONC CONCRETE

CPP CORRUGATED PLASTIC PIPE

DI DRAINAGE INLET

DIA DIAMETER

DIP DUCTILE IRON PIPE

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EP EDGE OF PAVEMENT

FDC FIRE DEPARTMENT CONNECTION

FFE FINISHED FLOOR ELEVATION

FH FIRE HYDRANT

FL FLOWLINE

G GROUND

GEN GENERATOR

INV INVERT

LF LINEAR FEET

L/P LIGHT POLE

MG MATCH GRADE

MH MANHOLE

P PAVEMENT

P/P POWER POLE

P.I. POINT OF INTERSECTION

P.T. POINT OF TANGENT

PIV POST INDICATOR VALVE

PVC POLYVINYL CHLORIDE

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RCP REINFORCED CONCRETE PIPE

SD STORM DRAIN

SSMH SANITARY SEWER MANHOLE

SS SANITARY SEWER

STD STANDARD

TBM TEMPORARY BENCH MARK

TC TOP OF CURB/TERRA-COTTA PIPE

TP TELEPHONE PEDESTAL

TRANS ELECTRIC TRANSFORMER

TW TOP OF WALL

TYP TYPICAL

W WATER

WDF WOOD FENCE

WV WATER VALVE

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AIR CONDITIONER

ELECTRIC MANHOLE

ELECTRIC JUNCTION BOX

ELECTRIC TRANSFORMER

UNDERGROUND ELECTRIC

STORM PIPES

FORCE MAIN

UNDERGROUND GAS LINE

SANITARY LINES

OVERHEAD LINES

DRAINAGE MANHOLE

DRAINAGE STRUCTURE NUMBER

CURB DRAINAGE INLET

DRAINAGE INLET

TEMPORARY BENCH MARK

TRAVERSE POINT

SOIL BORING

GAS VALVE

FIBER OPTIC WITNESS POST

MONITORING WELL/CONC.EDGE

SANITARY CLEAN OUT

SANITARY MANHOLE

POWER POLE WITH LIGHT

POWER POLE

LIGHT POLE

GUY WIRE

GROUND LIGHT

FUEL CAP

UNDERGROUND WATER

UNDERGROUND COMMUNICATIONS

SIAMESE CONNECTOR

WATER VALVE

WATER MANHOLE

FIRE HYDRANT

TREE / TRUNK SIZE & TYPE

TELEPHONE PEDESTAL

TELEPHONE HAND HOLE

TELEPHONE CABINET

COMMUNICATIONS MANHOLE

ASPHALT

CHAIN LINK FENCE

WOOD FENCE

GUARD RAIL

HAND RAILS

PROPANE TANK

BUILDING LINES

FLOW ARROW

SANITARY STRUCTURE NUMBER

WHEEL STOP

AIR PUMP/TANK

PICNIC TABLE

UNDERGROUND PROPANE TANK

BRICK BARRIER

SMOKING HUT

UNKNOWN MANHOLE

GAS MANHOLE

SIGN

BOLLARD

CONTOUR & ANNOTATION

EXISTING NEW

LEGEND

CONCRETE WALK

CURB

CURB AND GUTTER

MONITORING WELL

WATERLINE

REDUCER

15" SD

WATER METER

A26

GREASE TRAP

CURB AND REVERSED GUTTER

SWALE

DSCR CONTROL DISK

EXISTING NEW

LEGEND

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TRANS

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DMH

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CDI

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TBM

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18"OAK

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THH

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SMH

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CLF

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EJB

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CONC WALK

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EROSION AND SEDIMENT CONTROL NARRATIVE

DEFENSE LOGISTICS AGENCY ELK PASTURE STORMWATER MANAGEMENT

DEFENSE SUPPLY CENTER RICHMOND, CHESTERFIELD COUNTY, VA

1. PROJECT DESCRIPTION

THE PROPOSED DEFENSE LOGISTICS AGENCY ELK PASTURE STORMWATER

MANAGEMENT PROJECT IS LOCATED ON A 26 ACRE PRESERVE IN THE

SOUTHEAST CORNER OF DEFENSE SUPPLY CENTER RICHMOND (DSCR) IN

CHESTERFIELD COUNTY, VIRGINIA (8000 JEFFERSON DAVIS HWY,

RICHMOND, VA 23297). THE PROJECT SITE IS GENERALLY BOUND BY

PERIMETER ROAD TO THE SOUTH, G STREET TO THE WEST, CEMETERY

ROAD TO THE NORTH, AND JEFFERSON DAVIS HIGHWAY TO THE EAST.

THE PROPOSED IMPROVEMENTS INCLUDE THE INSTALLATION OF FIVE

STORMWATER MANAGEMENT FACILITIES. THE NEW FACILITIES WILL

PROVIDE SEDIMENT AND NUTRIENT REMOVAL IN ACCORDANCE WITH THE

VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY AND ENVIRONMENTAL

PROTECTION AGENCY PHASE II WATERSHED IMPLEMENTATION PLAN.

PROPOSED DRAINAGE PATTERNS FOR THE PROJECT SITE MATCH EXISTING

DRAINAGE PATTERNS AND CONSIST OF SHEET AND CHANNEL FLOW

TOWARDS THE SOUTHERN PROJECT BOUNDARY. STORMWATER QUALITY

AND QUANTITY ARE ACCOMPLISHED THROUGH THE INSTALLATION OF

STORMWATER MANAGEMENT FACILITIES CONSISTING OF FIVE DRY SWALES

THAT DRAIN TO EXISTING STORM SEWER OUTFALLS THAT DRAIN TO

KINGSLAND CREEK, SOUTH OF PROJECT AREA. THIS PROJECT WILL NOT

INCREASE IMPERVIOUS COVER. STORMWATER MANAGEMENT FACILITIES

AND PRACTICES COMPLY WITH THE VIRGINIA DEPARTMENT OF

ENVIRONMENTAL QUALITY REQUIREMENTS FOR WATER QUALITY AND

QUANTITY AND WITH THE VIRGINIA STORMWATER MANAGEMENT

HANDBOOK.

2.43 ACRES OF LAND WILL BE DISTURBED DURING THE CONSTRUCTION OF

THE PROJECT. LAND DISTURBING ACTIVITIES INCLUDE EROSION AND

SEDIMENT CONTROL (ESC) INSTALLATION, CLEARING AND GRUBBING,

ROUGH GRADING, INSTALLATION OF STORMWATER MANAGEMENT

FACILITIES, AND FINAL SITE GRADING. ACCESS DURING SITE

CONSTRUCTION WILL BE FROM TWO CONSTRUCTION ENTRANCES

CONNECTED TO ROAD L AND 5TH STREET.

CONSTRUCTION CREWS WILL MOBILIZE, OCCUPY THE PROJECT SITE,

INSTALL EROSION AND SEDIMENT CONTROL MEASURES, DEMOLISH AND

REMOVE ALL MATERIAL IDENTIFIED IN THE DEMOLITION PLAN, AND BRING

THE SITE TO ROUGH GRADE PRIOR TO INSTALLATION OF PROPOSED

STORMWATER MANAGEMENT FACILITIES. DEMOLITION IS TO BE

CONDUCTED IN ACCORDANCE WITH THE DEMOLITION PLAN, INCLUDED IN

THE ESC PLAN SHEETS.

THE RESPONSIBLE LAND DISTURBER (RLD), AS CERTIFIED BY THE VIRGINIA

DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ), WILL BE IN CHARGE OF

AND RESPONSIBLE FOR CARRYING OUT THE LAND DISTURBING ACTIVITIES

ASSOCIATED WITH THIS PROJECT.

2. EXISTING SITE CONDITIONS

THE PROJECT SITE IS LIGHTLY DEVELOPED AND CONSISTS PRIMARILY OF

AREAS OF GRASS AND TREES. IMPERVIOUS COVER IS MINIMAL AND

INCLUDES BUILDINGS, SIDEWALKS, AND SCATTERED AREA OF CONCRETE

PAVEMENT.

a. TOPOGRAPHY AND SOILS

THE PROJECT AREA HAS VARYING TOPOGRAPHY WITH 0 TO 12% SLOPES

SLOPING DOWNHILL TOWARDS THE SOUTHERN SITE BOUNDARY.

HOWEVER, THERE ARE AREAS WITH SLOPES UP TO AND EXCEEDING 3:1.

THE AVERAGE ELEVATION FOR THE PROJECT SITE IS APPROXIMATELY

102.00, AND THE ELEVATIONS RANGE FROM APPROXIMATELY 79.00 TO

124.00. THE SITE CURRENTLY DRAINS VIA SHEET AND CHANNEL FLOW

TOWARDS TWO SEPARATE STORM SEWER OUTFALLS THAT DRAIN TO

KINGSLAND CREEK, LOCATED SOUTH OF THE PROJECT SITE. SOILS FOUND

WITHIN THE PROJECT MOSTLY CONSIST OF SILTY SAND, GRAVELLY CLAY,

SANDY CLAY, SILTY CLAY, AND CLAY.

b. EXISTING INFRASTRUCTURE

WITH THE EXCEPTION OF TWO STORM SEWER OUTFALLS LOCATED

ADJACENT TO THE SOUTHERN SITE BOUNDARY, THERE IS NO STORM

SEWER INFRASTRUCTURE LOCATED WITHIN THE PROJECT SITE. ALL

RUNOFF FLOWS VIA SHEET FLOW AND CONCENTRATED SURFACE FLOW

PATTERNS. THE TWO EXISTING OUTFALLS CONSIST OF A YARD INLET

DRAINING TO A 12" RCP CULVERT AND A HEADWALL DRAINING TO A 24" RCP

CULVERT. BOTH CULVERTS OUTFALL TO KINGSLAND CREEK, LOCATED

SOUTH OF THE PROJECT AREA.

c. WATERSHED INFORMATION

THE PROJECT AREA DRAINS TO KINGSLAND CREEK, THEN TO THE JAMES

RIVER. THE ENTIRE AREA ULTIMATELY DRAINS TO THE CHESAPEAKE BAY

WATERSHED (HUC: CB25).

3. ADJACENT PROPERTY

THE PROJECT SITE IS LOCATED AT THE DEFENSE SUPPLY CENTER IN

RICHMOND, VA. THE SITE IS LOCATED SOUTH OF CONGRESS ROAD, WEST

OF JEFFERSON DAVIS HIGHWAY, AND NORTH OF KINGSLAND CREEK.

4. CRITICAL EROSION AREAS

CRITICAL EROSION AREAS OCCUR IN THE VICINITY OF THE SOUTHERN

SITE BOUNDARY AND LOCATIONS WHERE SITE GRADES REACH UP TO

AND BEYOND 3:1. CARE MUST BE TAKEN IN AREAS OF STEEP SLOPE TO

ENSURE THAT EXCESS SEDIMENT IS NOT GENERATED BY

CONSTRUCTION ACTIVITIES. SEDIMENT TRAPPING MEASURES

INSTALLED AT OR UPSTREAM OF EXISTING STORM SEWER OUTFALLS

MUST BE MAINTAINED DURING CONSTRUCTION ACTIVITIES TO PREVENT

SEDIMENT FROM LEAVING THE SITE AND ENTERING KINGSLAND CREEK.

5. EROSION AND SEDIMENT CONTROL MEASURES

UNLESS OTHERWISE INDICATED, ALL VEGETATED AND STRUCTURAL ESC

CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED

ACCORDING TO THE LATEST EDITION OF THE MINIMUM STANDARDS AND

SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL

HANDBOOK (VESCH) APPLICABLE TO THE COASTAL PLAIN REGION OF

VIRGINIA. THE MINIMUM STANDARDS OF THE VESCH SHALL BE ADHERED TO

BEFORE, DURING, AND AFTER CONSTRUCTION, UNLESS OTHERWISE

WAIVED OR APPROVED BY A VARIANCE. REFER TO THE CONSTRUCTION

PLANS FOR DETAILS AND LOCATIONS ASSOCIATED WITH THE CONTROL

MEASURES.

GENERAL

1) A COPY OF THE APPROVED ESC PLAN AND THE VESCH SHALL BE

MAINTAINED ON THE SITE AT ALL TIMES.

2) PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS

OTHER THAN INDICATED ON THE ESC PLANS (INCLUDING, BUT

NOT LIMITED TO OFF-SITE BORROW OR WASTE AREAS), THE

CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY ESC PLAN TO

THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN

APPROVING AUTHORITY.

3) THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLATION

AND MAINTENANCE OF ANY ADDITIONAL CONTROL MEASURES

NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS

DETERMINED NECESSARY BY THE PLAN APPROVING AUTHORITY

AT NO ADDITIONAL COST TO THE OWNER.

6. MINIMUM STANDARDS

MS-1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE

APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER

FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE.

TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN

SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT

FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN

FOURTEEN (14) DAYS. PERMANENT STABILIZATION SHALL BE

APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE

THAN ONE (1) YEAR.

MS-2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES

AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED

WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS

RESPONSIBLE FOR THE TEMPORARY PROTECTION AND

PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE

AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY

TRANSPORTED FROM THE PROJECT SITE.

MS-3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON

DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED.

PERMANENT VEGETATION SHALL NOT BE CONSIDERED

ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS

UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT

EROSION.

MS-4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT

BARRIERS AND OTHER MEASURES INTENDED TO TRAP

SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY

LAND-DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL

BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.

MS-5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN

STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS

IMMEDIATELY AFTER INSTALLATION.

MS-6. SEDIMENT TRAPS AND SEDIMENT BASINS, IF REQUIRED, SHALL

BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL

DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN.

A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL

BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE

TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN

THREE (3) ACRES.

B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS

COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN

OR EQUAL TO THREE (3) ACES SHALL BE CONTROLLED BY A

SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A

SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF

DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM,

MAINTAIN STRUCTURAL INTEGRITY OF THE BASIN DURING A

25-YEAR STORM OF 24-HOUR DURATION. RUNOFF

COEFFICIENTS USED IN RUNOFF CALCULATION S SHALL

CORRESPOND TO A BARE EARTH CONDITION OR THOSE

CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN

IS UTILIZED.

MS-7. CUT AND FILL SLOPES SHALL BE DESIGNED AND

CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION.

SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY

WITHIN ONE (1) YEAR OF PERMANENT STABILIZATION SHALL BE

PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES

UNTIL THE PROBLEM IS CORRECTED.

MS-8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL

SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE

TEMPORARY OR PERMANENT CHANNEL, FLUME, OR SLOPE

DRAIN STRUCTURE.

MS-9. WHENEVER WATER SEEPS FROM SLOPE FACE, ADEQUATE

DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED.

MS-10. ALL STORM SEWER INLETS THAT ARE MADE OPERATIONAL

DURING CONSTRUCTION SHALL BE PROTECTED SO THAT

SEDIMENT-LADEN WATER CANNOT ENTER THE CONVEYANCE

SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE

TREATED TO REMOVE SEDIMENT.

MS-11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE

CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE

OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR

PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH

THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL.

MS-12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED,

PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT,

CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK

AREA TO THE GREATEST EXTENT POSSIBLE DURING

CONSTRUCTION. NON-ERODIBLE MATERIAL SHALL BE USED

FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS.

EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF

ARMORED BY NON-ERODIBLE COVER MATERIALS.

MS-13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY

CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY

SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM

CROSSING CONSTRUCTED OF NON-ERODIBLE MATERIAL SHALL

BE PROVIDED.

MS-14. ALL APPLICABLE FEDERAL, STATE, AND LOCAL CHAPTERS

PERTAINING TO WORKING IN OR CROSSING LIVE

WATERCOURSES SHALL BE MET.

MS-15. THE BED AND BANKS OF A WATERCOURSE SHALL BE

STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE

IS COMPLETED.

MS-16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN

ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION

TO OTHER APPLICABLE CRITERIA:

A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED

AT ONE TIME.

B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE

OF TRENCHES.

C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE

FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT

TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER

THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR

OFF-SITE PROPERTY.

D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE

PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND

PROMOTE STABILIZATION.

E. RE-STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE

WITH THESE REGULATIONS.

F. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH.

MS-17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT

PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO

MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR

TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT

TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE

ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END

OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE

ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A

SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL

BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS

MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL

DEVELOPMENT LOTS AS WELL AS TO LARGER

LAND-DISTURBING ACTIVITIES.

MS-18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL

MEASURES SHALL BE REMOVED WITHIN THIRTY (30) DAYS

AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY

MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE

AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY. TRAPPED

SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM

THE DEPOSITION OF TEMPORARY MEASURES SHALL BE

PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION

AND SEDIMENTATION.

MS-19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM

DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT

DEPOSITION, EROSION, AND DAMAGE DUE TO INCREASES IN

VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER

RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR IN

ACCORDANCE WITH THE FOLLOWING STANDARDS AND

CRITERIA:

A. CONCENTRATED STORMWATER RUNOFF LEAVING A

DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY IN AN

ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE

OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF

IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM

STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE

SYSTEM SHALL BE PERFORMED.

B. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN

THE FOLLOWING MANNER:

1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL

DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE

CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE

CONTRIBUTING DRAINAGE AREA OF THE PROJECT: OR

a) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A

2-YEAR STORM TO VERIFY THAT STORMWATER WILL NOT

OVERTOP CHANNEL BANKS NOR CAUSE EROSION OF

CHANNEL BED OR BANKS.

b) ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS

SHALL BE ANALYZED BY THE USE OF A 10-YEAR STORM TO

VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANK

AND BY THE USE OF A 2-YEAR STORM TO DEMONSTRATE

THAT STORMWATER WILL NOT CAUSE EROSION OF CHANNEL

BED OR BANKS; AND

c) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY

THE USE OF A 10-YEAR STORM TO VERIFY THAT

STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR

SYSTEM.

US Army Corps of Engineers ®

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C. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY

CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT

ADEQUATE, THE APPLICANT SHALL:

1) IMPROVE THE CHANNELS TO A CONDITION WHERE AT 10-YEAR

STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM

WILL NOT CAUSE EROSION TO THE CHANNEL, THE BED, OR THE

BANKS; OR

2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE

10-YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES;

3) DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE

PRE-DEVELOPMENT PEAK RUNOFF RATE FROM A TWO-YEAR

STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL

CHANNEL OR WILL NOT CAUSE THE PRE-DEVELOPMENT PEAK

RUNOFF RATE FROM A 10-YEAR STORM TO INCREASE WHEN

RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR

4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT,

STORMWATER DETENTION OR OTHER MEASURES WHICH IS

SATISFACTORY TO THE LOCAL AUTHORITY TO PREVENT

DOWNSTREAM EROSION.

D. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO

MAKE THE IMPROVEMENTS.

E. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING

WATERSHED CHARACTERIZES AND THE ULTIMATE

DEVELOPMENT CONDITION OF THE SUBJECT PROJECT.

F. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES

STORMWATER DETENTION, HE SHALL OBTAIN APPROVAL FROM

THE LOCAL AUTHORITY OF A PLAN FOR MAINTENANCE OF THE

DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE

MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE

PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE.

G. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED

TO A RECEIVING CHANNEL, AND ENERGY DISSIPATERS SHALL BE

PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS

NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE

FACILITY TO THE RECEIVING CHANNEL.

H. ALL ON-SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE.

I. INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE

EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL

BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE

OR PIPE SYSTEM, OR TO A DETENTION FACILITY.

J. IN APPLYING THESE STORMWATER MANAGEMENT CRITERIA,

INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL

OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO

BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD, THE

DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO A

SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS

THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION SHALL

BE USED IN ALL ENGINEERING CALCULATIONS.

K. ALL MEASURES USED TO PROTECT PROPERTIES AND

WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH

MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND

BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER

WATERS OF THE STATE.

L. ANY PLAN APPROVED PRIOR TO JULY 1, 2014, THAT PROVIDES

FOR STORMWATER MANAGEMENT THAT ADDRESSES ANY FLOW

RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL

OR MAN-MADE CHANNELS SHALL SATISFY THE FLOW RATE

CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR

MAN-MADE CHANNELS IF THE PRACTICES ARE DESIGNED TO (I)

DETAIN THE WATER QUALITY VOLUME AND TO RELEASE IT OVER

48 HOURS; (II) DETAIN AND RELEASE OVER A 24-HOUR PERIOD

THE EXPECTED RAINFALL RESULTING FROM THE ONE YEAR,

24-HOUR STORM; AND (III) REDUCE THE ALLOWABLE PEAK FLOW

RATE RESULTING FROM THE 1.5, 2, AND 10-YEAR, 24-HOUR

STORMS TO A LEVEL THAT IS LESS THAN OR EQUAL TO THE

PEAK FLOW RATE FROM THE SITE ASSUMING IT WAS IN A GOOD

FORESTED CONDITION, ACHIEVED THROUGH MULTIPLICATION

OF THE FORESTED PEAK FLOW RATE BY A REDUCTION FACTOR

THAT IS EQUAL TO THE RUNOFF VOLUME FROM THE SITE WHEN

IT WAS IN A GOOD FORESTED CONDITION DIVIDED BY THE

RUNOFF VOLUME FORM THE SITE IN ITS PROPOSED CONDITION,

AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND

VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE

CHANNELS AS DEFINED IN ANY REGULATIONS PROMULGATED

PURSUANT TO §62.1-44.15:54 OR 62.1-44.15:65 OF THE ACT.

M. FOR PLANS APPROVED ON AND AFTER JULY 1, 2014, THE FLOW

RATE CAPACITY AND VELOCITY REQUIREMENTS OF

§62.1-44.15:52 A OF THE ACT AND THIS SUBSECTION SHALL BE

SATISFIED BY COMPLIANCE WITH WATER QUANTITY

REQUIREMENTS IN THE STORMWATER MANAGEMENT ACT

(§62.1-44.15:24 ET SEQ. OF THE CODE OF VIRGINIA) AND

ATTENDANT REGULATIONS, UNLESS SUCH LAND-DISTURBING

ACTIVITIES ARE IN ACCORDANCE WITH 9VAC25-870-48 OF THE

VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP)

REGULATIONS.

N. COMPLIANCE WITH THE WATER QUANTITY MINIMUM STANDARDS

SET OUT IN 9VAC25-870-66 OF THE VIRGINIA STORMWATER

MANAGEMENT PROGRAM (VSMP) REGULATIONS SHALL BE

DEEMED TO SATISFY THE REQUIREMENTS OF SUBDIVISION 19 OF

THIS SUBSECTION.

STRUCTURAL PRACTICES

1) TEMPORARY STONE CONSTRUCTION ENTRANCE (CE) - VESCH

STD. 3.02

TEMPORARY STONE CONSTRUCTION ENTRANCE IS PROVIDED TO REDUCE

THE AMOUNT OF MUD TRANSPORTED ONTO ADJACENT PAVED ROADWAYS

BY CONSTRUCTION VEHICLES. TEMPORARY STONE CONSTRUCTION

ENTRANCE WILL ALLOW ACCESS TO THE SITE. THE CONSTRUCTION

ENTRANCE IS 70-FEET IN LENGTH, 6-INCHES DEEP, AND 20-FEET IN WIDTH.

THE SECTION CONSISTS OF 2-INCH STONE UNDER-LAID WITH FILTER

FABRIC.

2) SILT FENCE (SF) - VESCH STD. 3.05

SILT FENCING WILL SERVE AS A PERIMETER CONTROL TO PROTECT

DISTURBED AREAS FROM OFF-SITE RUNOFF AND TO PREVENT

SEDIMENTATION DAMAGE TO AREAS OUTSIDE THE PROJECT SITE.

3) STORM DRAIN INLET PROTECTION (IP) - VESCH STD. 3.07

INLET PROTECTION WILL BE USED TO PREVENT ANY SEDIMENT CREATED

BY CONSTRUCTION ACTIVITIES AND DISTURBED AREAS FROM ENTERING

THE EXISTING STORM SEWER SYSTEM. INLET PROTECTION FOR PROPOSED

STORM WATER STRUCTURES SHOULD BE IMMEDIATELY BUILT AT EACH

STRUCTURE IN ORDER TO REDUCE THE AMOUNT OF FINE SEDIMENT

TRANSPORTED INTO THE STORM WATER PIPING.

4) TREE PRESERVATION & PROTECTION (TP) - VESCH STD. 3.38

TREE PROTECTION WILL BE USED TO PROTECT DESIRABLE TREES FROM

MECHANICAL AND OTHER INJURY DURING LAND DISTURBING AND

CONSTRUCTION ACTIVITY. AT MINIMUM, THE LIMITS OF CLEARING SHALL BE

LOCATED OUTSIDE THE DRIP LINE OF ANY TREE TO BE RETAINED, AND IN

NO CASE, CLOSER THAN 5-FEET TO THE TRUNK OF ANY TREE.

VEGETATED PRACTICES

1) TEMPORARY SEEDING - VESCH STD. 3.31

TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS

WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION

OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN

SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE

BUT WILL REMAIN DORMANT FOR LONGER THAN FOURTEEN (14) DAYS.

TEMPORARY SEEDING SHALL BE APPLIED IMMEDIATELY AFTER ROUGH

GRADING IS COMPLETED ON THE RESPECTIVE AREAS. REFER TO TABLE

3.31-B FOR TEMPORARY SEEDING GUIDANCE.

2) PERMANENT SEEDING - VESCH STD. 3.32

PERMANENT SEEDING SHALL BE USED TO ACHIEVE PERMANENT

VEGETATED COVER IN ALL AREAS AS DICTATED BY PERMANENT

STABILIZATION. PERMANENT SEEDING SHALL BE PERFORMED IN

ACCORDANCE WITH TABLE 3.32-A AND PLATE 3.32-D.

MANAGEMENT STRATEGIES

1) STORM DRAIN INLET PROTECTION, STONE CONSTRUCTION

ENTRANCE, AND SILT FENCE WILL BE INSTALLED AS AN EARLY

STEP DURING LAND DISTURBING ACTIVITIES.

2) THE SITE IS TO DRAIN TO SEDIMENT-TRAPPING CONTROLS AT ALL

TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE

DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.

3) RESPONSIBILITY FOR PLAN IMPLEMENTATION SHOULD BE GIVEN

TO THE CONSTRUCTION SUPERINTENDENT AND HE/SHE SHALL

MAKE ALL CONSTRUCTION WORKERS AWARE OF THE

PROVISIONS OF THE PLAN.

4) ALL ESC CONTROL MEASURES SHALL BE CHECKED

CONTINUOUSLY AND ESPECIALLY AFTER SIGNIFICANT STORM

EVENTS TO LOCATE DAMAGES AND TO CONDUCT MAINTENANCE

OPERATIONS. INSPECTIONS SHALL OCCUR DURING OR

IMMEDIATELY AFTER INSTALLATION OF ESC CONTROLS.

INSPECTIONS SHALL BE PERFORMED AT LEAST ONCE EVERY TWO

WEEKS, WITHIN 48 HOURS OF ANY RUNOFF PRODUCING RAIN

EVENT, AND AT THE COMPLETION OF THE PROJECT. ALL

MEASURES SHALL HAVE AN INSPECTION AND MAINTENANCE PLAN

THAT IDENTIFIES THE OWNER AND THE RESPONSIBLE PARTY FOR

CARRYING OUT THE INSPECTION AND MAINTENANCE PLAN.

5) ALL TEMPORARY ESC CONTROL MEASURES SHALL BE REMOVED

WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE

TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS

OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY.

TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS

RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES

SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER

EROSION AND SEDIMENTATION.

6) UNDERGROUND UTILITY LINES

a. NO MORE THAN 500 LF OF TRENCH MAY BE OPENED AT ONE

TIME.

b. EXCAVATED FILL SHALL BE PLACED ON THE UPHILL SIDE OF

TRENCHES.

c. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE

PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND

PROMOTE STABILIZATION.

7) WHENEVER A SLOPE FACE HAS WATER SEEPING FROM IT,

ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE

PROVIDED.

8) STORM DRAIN AND CULVERT INLET PROTECTION SHALL BE

REQUIRED ON ALL ACTIVE STORM SEWER INLETS. INLET

PROTECTION SHALL BE ESTABLISHED ON INLETS PRIOR TO

PLACING THEM IN SERVICE.

9) ANY AND ALL MATERIAL TRANSPORTED ONTO A PUBLIC OR

PRIVATE ROAD SURFACE WILL BE REMOVED THOROUGHLY AT

THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM

THE ROAD BY SHOVELING OR SWEEPING AND TRANSPORTED TO

A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL

BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS

MANNER.

10) CONSTRUCTION TRAFFIC SHALL BE LIMITED TO ACCESS ROADS.

ALL TRAFFIC IS PROHIBITED FROM CROSSING DRAINAGE SWALES

AND STREAMS, EXCEPT WHERE ABSOLUTELY NECESSARY.

11) IF NEEDED, DEWATERING AND WELL POINT DISCHARGE

OPERATIONS MUST PROVIDE APPROPRIATE EROSION AND

SEDIMENT CONTROL DEVICES AND PRACTICES, AND BE

APPROVED BY THE INSPECTOR PRIOR TO THE COMMENCEMENT

OF DISCHARGE OPERATIONS. A “STOP WORK ORDER” MAY BE

ISSUED AND/OR LEGAL ACTION TAKEN FOR NON-COMPLIANCE.

12) THE CONTRACTOR SHALL MONITOR AND TAKE PRECAUTIONS TO

CONTROL DUST, INCLUDING (BUT NOT LIMITED TO) USE OF

WATER OR CHEMICAL DUST PALLIATIVE, LIMITING THE NUMBER

OF VEHICLES ALLOWED ON-SITE, MINIMIZING THE OPERATING

SPEED OF ALL VEHICLES, ETC.

13) ALL TEMPORARY EQUIPMENT, CONSTRUCTION MATERIAL, AND

DEBRIS MUST BE REMOVED FROM THE SITE IN A LAWFUL MANNER

IN ORDER FOR CONSTRUCTION TO BE CONSIDERED COMPLETE.

6. PERMANENT STABILIZATION

FINISH GRADING WILL NOT BE COMPLETED DURING LAND DISTURBING

ACTIVITIES. ALL AREAS DISTURBED SHALL BE STABILIZED WITH

TEMPORARY OR PERMANENT SEEDING IMMEDIATELY FOLLOWING FINISH

GRADING. SOIL SURFACE SHALL BE CLEARED OF TRASH, DEBRIS, LARGE

ROOTS, BRANCHES, STONES AND CLODS PRIOR TO SEEDING.

IRREGULARITIES TO THE SOIL SURFACE SHALL BE LEVELED OR FILLED TO

PREVENT DEPRESSIONS AND WATER POCKETS PRIOR TO INSTALLATION.

SEEDING SHALL NOT BE INSTALLED IN EXCESSIVELY WET OR DRY

WEATHER OR WHEN THE GROUND IS FROZEN.

7. STORMWATER MANAGEMENT

STONE CONSTRUCTION ENTRANCES, STORM DRAIN INLET PROTECTION,

CULVERT INLET PROTECTION AND SILT FENCING WILL BE CONSTRUCTED

PRIOR TO LAND DISTURBANCES TO PROVIDE FOR SETTLEMENT OF

SEDIMENTS IN STORM WATER RUNOFF PRIOR TO RELEASE TO THE

RECEIVING WATERS.

8. MAINTENANCE

IN GENERAL, ALL ESC MEASURES WILL BE CHECKED DAILY AND AFTER

EACH SIGNIFICANT RAINFALL. ITEMS WILL BE CHECKED IN ACCORDANCE

WITH THE EROSION AND SEDIMENT CONTROL MAINTENANCE NOTES.

EROSION AND SEDIMENT CONTROL MAINTENANCE NOTES

1) TEMPORARY STONE CONSTRUCTION ENTRANCE (CE) - VESCH

STD. 3.02

1. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT

TRACKING OR FLOW OF MUD ONTO PUBLIC ROADWAYS. THIS MAY REQUIRE

PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND

REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR

AND/OR CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL

MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES

ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY.

THE USE OF WATER TRUCKS TO REMOVE MATERIALS DROPPED, WASHED, OR

TRACKED ONTO ROADWAYS WILL NOT BE PERMITTED UNDER ANY

CIRCUMSTANCES.

2) SILT FENCE (SF) - VESCH STD. 3.05

1. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND

AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS

SHALL BE MADE IMMEDIATELY.

2. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE

RESULTING FROM END RUNS AND UNDERCUTTING.

3. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE

PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL

BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY.

4. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT.

THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY

ONE-HALF THE HEIGHT OF THE BARRIER.

5. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO

LONGER REQUIRED SHALL BE DRESSED TO CONFORM TO THE EXISTING

GRADE, PREPARED AND SEEDED.

3) STORM DRAIN INLET PROTECTION (IP) - VESCH STD. 3.07

1. INLET PROTECTION SHALL BE INSPECTED IMMEDIATELY AFTER EACH

RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY

REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY.

2. SEDIMENT SHALL BE REMOVED AND THE MEASURE RESTORED TO ITS

ORIGINAL DIMENSIONS WHEN SEDIMENT HAS ACCUMULATED TO ONE HALF

THE DESIGN DEPTH OF THE TRAP. REMOVED SEDIMENT SHALL BE DEPOSITED

IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE.

3. INLET PROTECTION SHALL BE REMOVED AND THE AREA STABILIZED WHEN

THE REMAINING DRAINING AREA HAS BEEN PROPERLY STABILIZED.

4. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY.

4) TREE PROTECTION & PRESERVATION (TP) - VESCH STD. 3.38

1. TREE PROTECTION SHALL BE INSPECTED DAILY FOR DAMAGE. ANY

REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY.

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SEQUENCE OF CONSTRUCTION

ONLY ONE OF THE THREE ELK PASTURES MAY BE DISTURBED AT ONCE.

CONSTRUCTION WITHIN THE SECOND AND/OR THIRD PASTURE MAY ONLY

BEGIN ONCE CONSTRUCTION WITHIN THE PREVIOUS PASTURE(S) HAS BEEN

COMPLETED, ALL DISTURBED AREAS ARE STABILIZED, AND RESIDENT ELK

HAVE BEEN RELOCATED.

1. OBTAIN NECESSARY PERMITS.

2. MOBILIZATION.

3. ERECT CONTRACTOR STAGING AREAS.

4. INSTALL CONSTRUCTION ENTRANCE.

5. INSTALL EROSION AND SEDIMENT CONTROL MEASURES AROUND LAND

DISTURBING ACTIVITIES ON PROJECT SITE. NO EROSION AND SEDIMENT

CONTROLS MAY BE REMOVED WITHOUT THE DEQ INSPECTOR'S

APPROVAL.

6. PERFORM ROUGH GRADING OF THE SITE.

7. INSTALL ALL PROPOSED STORM DRAINAGE STRUCTURES AND PIPES.

8. INSTALL INLET PROTECTION FOR STORMWATER INLET STRUCTURES AS

THEY ARE CONSTRUCTED.

9. INSTALL TEMPORARY SEEDING IN ALL DENUDED AREAS.

10. INSTALL DRY SWALES (REFER TO STORMWATER MANAGEMENT FACILITY

CONSTRUCTION SEQUENCING, THIS SHEET).

11. PROTECT THE DRY SWALES UPON COMPLETION OF ROUGH GRADING TO

PREVENT SEDIMENTATION OF AREAS OF INFILTRATION.

12. FINE GRADE REMAINING SITE.

13. ALL EXCAVATED MATERIAL SHALL BE DISPOSED OF IN A LAWFUL MANNER.

14. REMOVE TEMPORARY EQUIPMENT, CONSTRUCTION MATERIALS, AND

DEBRIS FROM SITE.

15. REMOVE TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES

AFTER FINAL STABILIZATION OF THE SITE.

TABLE 3.31-B

ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS

MULCHING

A. SEEDING MADE IN FALL FOR WINTER COVER AND DURING HOT DRY

SUMMER MONTHS SHALL BE MULCHED IN ACCORDANCE WITH

MULCHING, STD. & SPEC. OF THE VIRGINIA EROSION & SEDIMENT

CONTROL HANDBOOK, THIRD EDITION 1992.

MAINTENANCE

A. IRRIGATION - IF SOIL MOISTURE IS DEFICIENT. SUPPLY NEW SEEDINGS

AND PLANTINGS WITH ADEQUATE WATER FOR PLANT GROWTH UNTIL

THEY ARE FIRMLY ESTABLISHED.

B. REPAIR - INSPECT ALL AREAS FOR PLANTING FAILURES AND MAKE

NECESSARY REPAIRS.

PLANTING DATES

SEPT. 1 - FEB. 15

FEB. 16 - APR. 30

MAY 1 - AUG. 31

ESTABLISHED.

SPECIES

50/50 MIX OF ANNUAL

RYEGRASS (LOLIUM

MULTI-FLORUM) &

CEREAL (WINTER) RYE

(SECALE CEREALE)

ANNUAL RYEGRASS

(LOLIUM

MULTI-FLORUM)

GERMAN MILLET

(SETARIA ITALICA)

SEEDING RATE (LBS./ACRE)

50 - 100

60 - 100

DRY SWALES

1. DRY SWALES SHOULD REMAIN OUTSIDE THE LIMIT OF DISTURBANCE

DURING CONSTRUCTION TO PREVENT SOIL COMPACTION BY HEAVY

EQUIPMENT. HOWEVER, THIS IS SELDOM PRACTICAL GIVEN THAT SWALES

ARE A KEY PART OF THE DRAINAGE SYSTEM AT MOST SITES. IN THESE

CASES, VDOT EC-2 SOIL STABILIZATION MATTING AND OTHER SIMILAR

MEASURES SHOULD BE INTEGRATED INTO THE SWALE CONSTRUCTION

THROUGHOUT THE CONSTRUCTION SEQUENCE.

2. CONSTRUCTION OF THE DRY SWALE MAY ONLY BEGIN AFTER THE ENTIRE

CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION

OR WHILE PROTECTED WITH TEMPORARY E&S CONTROLS AROUND THE

BASIN. THE PROPOSED SITE SHOULD BE CHECKED FOR EXISTING UTILITIES

PRIOR TO ANY EXCAVATION.

3. THE DESIGNER AND THE INSTALLER SHOULD HAVE A PRECONSTRUCTION

MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE

AREA AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO

ORIGINAL DESIGN.

4. TO AVOID SOIL COMPACTION, HEAVY EQUIPMENT SUCH AS EXCAVATORS

AND BACKHOES SHALL NOT BE DRIVEN OR PARKED WITHIN DRY SWALE

FOOTPRINTS. EXCAVATION SHALL BE PERFORMED FROM THE SIDES OF

THE DRY SWALE AREAS TO THE APPROPRIATE DESIGN DEPTH AND

DIMENSIONS. EXCAVATING EQUIPMENT SHOULD HAVE SCOOPS WITH

ADEQUATE REACH.

5. THE BOTTOM OF THE DRY SWALE SHOULD BE RIPPED, ROTO-TILLED OR

OTHERWISE SCARIFIED TO PROMOTE GREATER INFILTRATION

6. PLACE NON-WOVEN GEOTEXTILE FABRIC AT THE AT THE BOTTOM OF THE

DRY SWALE. GEOTEXTILE SHALL BE LAID FLAT AND UNSTRETCHED.

MINIMUM LAP LENGTH BETWEEN SHEETS OF GEOTEXTILE FABRIC SHALL BE

12". UPSTREAM SHEETS SHALL BE OVERLAPPED ONTO DOWNSTREAM

SHEETS.

7. PLACE THE STONE NEEDED FOR STORAGE LAYER OVER THE FILTER BED.

PERFORATE THE UNDERDRAIN PIPE AND CHECK ITS SLOPE. ADD THE

REMAINING STONE JACKET, AND THEN PACK #2 STONE TO 3 INCHES ABOVE

THE TOP OF THE UNDERDRAIN.

8. OBTAIN SOIL MEDIA FROM A QUALIFIED VENDOR, AND STORE IT ON AN

ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. AFTER VERIFYING

THAT THE MEDIA MEETS THE SPECIFICATIONS, ADD THE SOIL MEDIA IN

12-INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE DRY SWALE IS

ACHIEVED. WAIT A FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD

ADDITIONAL MEDIA AS NEEDED.

STORMWATER MANAGEMENT FACILITY CONSTRUCTION SEQUENCING

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INITIAL AND SUBSEQUENT ANNUAL INSPECTIONS ARE USED TO TRIGGER

MAINTENANCE OPERATIONS SUCH AS SEDIMENT REMOVAL, SPOT

REVEGETATION AND INLET STABILIZATION. THE FOLLOWING IS A LIST OF

SEVERAL KEY MAINTENANCE INSPECTION POINTS:

1. FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHOULD

BE INSPECTED AT LEAST TWICE AFTER STORM EVENTS THAT EXCEED 1/2

INCH OF RAINFALL.

2. INSPECTORS SHOULD LOOK FOR BARE OR ERODED AREAS IN THE

CONTRIBUTING DRAINAGE AREA OR AROUND THE DRY SWALE AREA, AND

MAKE SURE THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER.

3. ONE-TIME, SPOT START-UP FERTILIZATION MAY BE NEEDED FOR INITIAL

SEED AND/OR PLANTINGS.

4. DEPENDING ON THE TIME OF YEAR OF INITIAL PLANTING, WATERING IS

NEEDED ONCE A WEEK DURING THE FIRST 2 MONTHS, AND THEN AS

NEEDED DURING FIRST GROWING SEASON (APRIL-OCTOBER) DEPENDING

ON RAINFALL.

IDEALLY, INSPECTIONS OF DRY SWALES SHOULD BE CONDUCTED IN THE

SPRING OF EACH YEAR.

1. CHECK TO SEE IF 95% TURF COVER OR VEGETATION DENSITY HAS BEEN

ACHIEVED IN THE BED AND BANKS OF THE DRY SWALE,

2. CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR

PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTING INTO THE DRY

SWALE, AND CHECK FOR OTHER SIGNS OF BYPASSING.

3. CHECK FOR ANY WINTER- OR SILT-KILLED VEGETATION.

4. CHECK INFLOW POINTS FOR CLOGGING OR ACCUMULATED SAND,

SEDIMENT AND TRASH, AND REMOVE IT.

5. INSPECT DRY SWALE SIDE SLOPES AND GRASS FILTER STRIPS FOR

EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT

6. CHECK THE DRY SWALE FOR EVIDENCE OF EXCESSIVE PONDING OR

CONCENTRATED FLOWS, AND TAKE APPROPRIATE REMEDIAL ACTION.

7. WHEN SEDIMENT ACCUMULATION IS NOTED, LOOK FOR ANY BARE SOIL OR

SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND

STABILIZE THEM IMMEDIATELY.

8. CHECK FOR CLOGGED OR SLOW-DRAINING SOIL MEDIA, A CRUST FORMED

ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR OTHER CAUSES OF

INSUFFICIENT FILTERING TIME, AND RESTORE PROPER FILTRATION

CHARACTERISTICS.

9. INPSECT UPSTREAM AND DOWNSTREAM OF CHECK DAMS FOR EVIDENCE

OF UNDERCUTTING OR EROSION< AND REMOVE TRASH OR BLOCKAGES AT

WEEPHOLES.

IF WATER REMAINS ON THE SURFACE FOR MORE THAN 48 HOURS AFTER A

STORM, ADJUSTMENTS TO THE GRADING, REHABILITATION OF THE SURFACE

INFILTRATION, OR UNDERDRAIN REPAIRS MAY BE NEEDED. THE FOLLOWING

ARE POSSIBLE SOLUTIONS:

1. THE SURFACE OF THE FILTER BED CAN BECOME CLOGGED WITH FINE

SEDIMENT OVER TIME. THIS WILL BE EVIDENCED BY ACCUMULATED

SEDIMENT, A FINE CRUST THAT BUILDS UP AFTER THE FIRST SEVERAL

STORM EVENTS, OR CRACKING OF THE SURFACE SEDIMENT LAYER).

REMOVE ACCUMULATED SEDIMENT AND TILL 2 TO 3 INCHES OF SAND INTO

THE UPPER 8 TO 12 INCHES OF SOIL.

2. OPEN THE UNDERDRAIN OBSERVATION WELL OR CLEANOUT AND POUR IN

WATER TO VERIFY THAT THE UNDERDRAINS ARE FUNCTIONING AND NOT

CLOGGED OR OTHERWISE IN NEED OF REPAIR. THE PURPOSE OF THIS

CHECK IS TO SEE IF THERE IS STANDING WATER ALL THE WAY DOWN

THROUGH THE SOIL. IF THERE IS STANDING WATER ON TOP, BUT NOT IN

THE UNDERDRAIN, THEN THERE IS A CLOGGED SOIL LAYER. IF THE

UNDERDRAIN AND STAND PIPE INDICATES STANDING WATER, THEN THE

UNDERDRAIN MUST BE CLOGGED AND WILL NEED TO BE SNAKED.

3. IF THE EVIDENCE INDICATES THAT A SOIL LAYER IS CLOGGED, INSTALL

SAND WICKS FROM 3 INCHES BELOW THE SURFACE TO THE UNDERDRAIN

LAYER. SAND WICKS CAN BE INSTALLED BY EXCAVATING OR AUGERING

(USING A TREE AUGER OR SIMILAR TOOL) DOWN TO THE GRAVEL STORAGE

ZONE TO CREATE VERTICAL COLUMNS WHICH ARE THEN FILLED WITH A

CLEAN OPEN-GRADED COARSE SAND MATERIAL (COARSE SAND MIX

SIMILAR TO THE GRADATION USED FOR THE SOIL MEDIA). A SUFFICIENT

NUMBER OF WICK DRAINS OF SUFFICIENT DIMENSION SHOULD BE

INSTALLED TO MEET THE DESIGN DEWATERING TIME FOR THE FACILITY.

4. LAST RESORT - REMOVE AND REPLACE SOME OR ALL OF THE SOIL MEDIA.

STORMWATER MANAGEMENT FACILITY MAINTENANCE OPERATIONS

PERMANENT SEEDING PS

BORING LOG LOCATION MAP

SCALE: 1 IN. = 100 FT.

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0' 100' 200' 300'

GRAPHIC SCALE 1" = 100'

AutoCAD SHX Text

BMP-1.3

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BMP-1.2

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BMP-1.1

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BMP-6.6

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BMP-6.5

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BMP-6.4

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BMP-6.3

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BB002

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C-101

0' 100' 200' 300'

GRAPHIC SCALE 1" = 100'

KEY PLAN

SCALE: 1 IN.

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