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SHEET 1 — — — EROSION & CONTROL PLAN — PHASE I
— — — — SHEET 2 — EROSION & CONTROL PLAN — PHASE II
--------------- \ SHEET 3 — — — ESC NARRATIVE & DETAILS
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JOB:
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DATE:
02-17-2021
SCALE:
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JOB:
19.0887
SHEET:
2 OF 3
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EROSION AND SEDIMENT CONTROL NARRATIVE
PRIOR TO CONSTRUCTION
1. OWNER SHALL POST SURETY BONDS FOR CONSTRUCTION, EROSION &
SEDIMENT CONTROL.
2. CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE
RIGHT-OF-WAY (VDOT LAND -USE PERMIT). BONDING FOR WORK
WITHIN THE VDOT RIGHT-OF-WAY MAY BE REQUIRED TO OBTAIN THE
PERMIT.
3. CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP
PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF
ENVIRONMENTAL QUALITY (DEQ).
4. CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE
COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION.
5. A PRE -CONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED
LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE
REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING
OF PRE -CONSTRUCTION MEETING.
6. AREA OF FOREST/OPEN SPACE SHALL BE DEMARCATED
(FENCED -OFF) PRIOR TO ANY LAND DISTURBING ACTIVITIES.
PROJECT DESCRIPTION
THIS PROJECT PROPOSES TO REPLACE AN EXISTING GRASSPAVE PARKING
LOT WITH REHABILITATED GRASS PARKING AREAS AND A 20' WIDE
GRASSPAVE DRIVE LOOP.
EXISTING SITE CONDITIONS
THE PARKING LOT CURRENTLY CONSIST OF A GRAVEL PARKING AREA WITH
A MULCHED ISLAND BETWEEN THE GRAVEL PARKING LOT AND EXISTING
ASPHALT PARKING LOT.
ADJACENT AREAS
THE RESIDENTIAL LOT IS BOUND BY AVINITY SUBDIVISION OPEN SPACE
AREA ON THE NORTH AND WEST SIDES, AND IS FRONTED TO THE SOUTH
BY STATE ROUTE 20 (SCOTTSVILLE ROAD). THE EAST OF THE PROPERTY
IS BOUND BY A LARGE SINGLE FAMILY RESIDENTIAL PARCEL.
OFF -SITE AREAS
ANY EXCESS MATERIAL GENERATED AS PART OF THIS PROJECT SHALL BE
STORED OR SPREAD WITHIN THE APPROVED LAND DISTURBANCE AREA OR
IN AN AREA APPROVED BY THE COUNTY OF ALBEMARLE COMMUNITY
DEVELOPMENT DEPARTMENT.
SOILS
72D3-RABUN CLAY, 15 TO 25
PERCENT SLOPES
HYDROLOGIC SOIL GROUP B.
SOMEWHAT STEEP SLOPING AND WELL
DRAINED, STARTING AT SURFACE
LAYER TO SUBSTRATUM, SOIL LAYERS
CONSIST OF CLAY, AND SILTY
CLAY LOAM, PERMEABILITY IS VERY LOW TO
HIGH WHILE AVAILABLE WATER
CAPACITY IS MODERATE, SURFACE RUNOFF
IS HIGH, HAZARD OF EROSION
IS MODERATE.
72C3-RABUN CLAY. 7 TO 15
PERCENT SLOPES
HYDROLOGIC SOIL GROUP B.
SOMEWHAT STEEP SLOPING AND WELL
DRAINED, STARTING AT SURFACE
LAYER TO SUBSTRATUM, SOIL LAYERS
CONSIST OF CLAY, AND SILTY
CLAY LOAM, PERMEABILITY IS VERY LOW TO
HIGH WHILE AVAILABLE WATER
CAPACITY IS MODERATE, SURFACE RUNOFF
IS HIGH, HAZARD OF EROSION
IS SLIGHT.
CRITICAL AREAS
CRITICAL SLOPES DO NOT EXIST ON THIS JOB SITE.
STRUCTURAL PRACTICES
1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - A TEMPORARY
CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT SITE ENTRANCE
OFF OF PLANK ROAD.
2. ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND
OTHER ON -SITE VEHICLE TRANSPORTATION ROUTES SHALL BE
STABILIZED WITH STONE IMMEDIATELY AFTER GRADING.
3. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE
INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON
THE EROSION AND SEDIMENT CONTROL PLAN.
4. STORM DRAIN INLET PROTECTION (3.07) - A SEDIMENT FILTER OR
AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
INLET OR CURB INLET.
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5. TEMPORARY SEEDING TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL
GRADE FOR A PERIOD OF MORE THAN 14 DAYS SHALL BE
STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT
TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK
WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE
SOIL ON SLOPES IF STRAW IS TO BE USED.
6. PERMANENT SEEDING (3.32) - AREAS BROUGHT TO FINAL GRADE OR
THOSE CONSTRUCTION AREAS THAT WILL REMAIN DORMANT FOR YEAR
OR MORE SHALL BE STABILIZED WITH A PERMANENT SEED MIXTURE
ACCEPTABLE TO THAT TIME OF YEAR. PREPARE SURFACE WITH
APPROVED TREATMENT AND ADDITIVES PRIOR TO APPLYING SEED.
7. DUST CONTROL (,3.39) - DUST CONTROL METHODS MUST BE USED
TO REDUCE THE AMOUNT OF AIRBORNE DUST DURING ALL PHASES
OF CONSTRUCTION WHERE SOIL IS EXPOSED OR DISTURBED.
MANAGEMENT STRATEGIES
1. THE CONSTRUCTION ENTRANCE AND PERIMETER EROSION CONTROL
MEASURES SUCH AS SILT FENCE SHALL BE INSTALLED AS THE FIRST
STEP OF DISTURBANCE.
2. TEMPORARY SEEDING OR OTHER STABILIZATION METHODS SUCH AS
BASE AGGREGATE WILL FOLLOW IMMEDIATELY AFTER REACHING FINAL
GRADES.
3. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT
A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND
RE -SEEDED AS NEEDED TO ESTABLISH GROWTH.
4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE
INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT
CONTROL PRACTICES.
AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL
ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS
CAN BE CLEANED UP OR REMOVED, AND THE SEDIMENT TRAP CAN BE
FILLED IN AND SEEDED FOR SITE STABILIZATION.
PERMANENT STABILIZATION
ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH
STRAW & SEED IMMEDIATELY FOLLOWING FINISHED GRADE. SEEDING
SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO
STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE
VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER
AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST
RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT
AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL
ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS,
OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO
hL
THE SOIL ON SLOPES IF STRAW IS TO BE USED.
EROSION CONTROL MAINTENANCE
1. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL
BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE
FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR:
2. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL
BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS
TO PREVENT THE TRANSPORTATION OF SOIL ONTO THE ROADWAY,
ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY
BE REQUIRED.
3. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL
AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE
ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE
RESULTING FROM END RUNS AND UNDERCUTTING. 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. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH
STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH
APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY
SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS
NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE
EXISTING GRADE, PREPARED, AND SEEDED.
4. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT
A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND
RE -SEEDED AS NEEDED. IN THE EVENT THAT THE APPLIED SEEDING
FAILS TO TAKE HOLD, BLANKET MATTING SHALL BE PLACED IN
APPROPRIATE AREAS DEEMED NECESSARY BY THE ENGINEER OR
EROSION CONTROL INSPECTOR.
SEQUENCE OF CONSTRUCTION
1. AFTER OBTAINING ALL REQUIRED PERMITS THE CONTRACTOR SHALL
COORDINATE A PRE -CONSTRUCTION MEETING, ALLOWING 72 HOURS
FOR ITS COORDINATION.
2. INSTALL CONSTRUCTION ENTRANCE.
2.1. SHOULD THE TEMPORARY CONSTRUCTION ENTRANCE NOT BE
MAINTAINED PROPERLY OR AN EXCESSIVE AMOUNT OF SOIL
FOUND TRACKED ONTO THE PUBLIC ROADWAY, THEN A PAVED
CONSTRUCTION ENTRANCE, WATER TANKER TRUCK WITH TWO (2)
PRESSURE WASHERS AND A SETTLING AREA MAY BE REQUIRED
BY THE EROSION AND SEDIMENT CONTROL PROGRAM
ADMINISTRATOR.
3. SILT FENCE SHALL BE INSTALLED ON THE DOWNHILL SIDE OF ALL
LAND DISTURBANCE. INLET PROTECTION SHALL BE INSTALLED ON ALL
INLETS WITHIN THE LIMITS OF DISTURBANCE.
4. CONSTRUCTION OF THE GRASS PAVERS AND REHABILITATED GRASS
PARKING SPACES CAN BEGIN ONCE ALL EROSION AND CONTROL
MEASURES ARE PLACED.
5. STOCKPILE TOPSOIL WITHIN AN AREA ON THE PROPERTY OR A
LOCATION APPROVED BY ALBEMARLE COUNTY COMMUNITY
DEVELOPMENT. INSTALL SILT FENCE AT THE PERIMETER OF
STOCKPILE(S) AS NECESSARY.
6. DENUDED AREAS SHALL DRAIN TO AN APPROVED EROSION CONTROL
MEASURE AT ALL TIMES DURING CONSTRUCTION.
7. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED
TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS
REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL
STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED
AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION
SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR
MORE THAN ONE YEAR.
8. LIME, FERTILIZE AND APPLY TEMPORARY OR PERMANENT SEEDING TO
ALL DENUDED AREAS IMMEDIATELY AFTER ACHIEVING FINAL GRADES.
9. AFTER PROPOSED CONSTRUCTION IS COMPLETED AND THE SITE IS
COMPLETELY STABILIZED, PERMISSION IS TO BE OBTAINED FROM THE
EROSION CONTROL INSPECTOR FOR THE REMOVAL OF SILT FENCING
AND OTHER REMAINING TEMPORARY EROSION CONTROL MEASURES.
EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS
1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED
TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS
REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL
STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED
AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION
SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR
MORE THAN ONE YEAR.
CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT ALLOW
ANY SEDIMENT TO EXIT THE PROJECT LIMITS.
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.
CONTRACTOR TO PROTECT STOCKPILE AREAS WITH SILT FENCE.
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.
CONTRACTOR SHALL ESTABLISH A VEGETATIVE COVER ON ALL
DENUDED AREAS.
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. CONTRACTOR SHALL ESTABLISH THE
PERIMETER CONTROLS OF SUPER SILT FENCE AS THE FIRST STEP OF
THE LANDS DISTURBANCE FOR THIS PROJECT.
5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN
STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY
AFTER INSTALLATION. CONTRACTOR SHALL INSPECT EROSION CONTROL
MEASURES AFTER EACH RAINFALL EVENT.
6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND
CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE
SERVED BY THE TRAP OR BASIN. THERE ARE NO SEDIMENT TRAPS
OR BASINS PROPOSED.
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 YEAR OF PERMANENT
STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE
STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED.THERE
ARE NO PROPOSED CUT OR FILL SLOPES. HOWEVER, THE
CONTRACTOR IS TO RESTORE THE PROJECT AREA TO EXISTING
GRADE. IF THE AREAS WITH NATURALLY STEEP SLOPES ARE FOUND
TO BE ERODING EXCESSIVELY AFTER ONE YEAR, CONTRACTOR IS TO
PROVIDE ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE
PROBLEM IS CORRECTED.
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.MAXIMIZE
SHEETFLOW AND GROUNDWATER INFILTRATION
9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE
OR OTHER PROTECTION SHALL BE PROVIDED.CONTRACTOR TO NOTIFY
ENGINEER AND COUNTY EROSION CONTROL INSPECTOR.
10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE 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.THERE
ARE NO STORM SEWER INLETS PROPOSED.
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.THERE ARE NO STORMWATER CONVEYANCE
CHANNELS OR PIPES PROPOSED.
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.CONTRACTOR
SHALL FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING
REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS.
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.CONTRACTOR SHALL
FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING
REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS.
14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS
PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES
SHALL BE MET.CONTRACTOR SHALL FOLLOW FOLLOW ALL APPLICABLE
FEDERAL, STATE AND LOCAL REQUIREMENTS FOR THE TWO
INTERMITTENT STREAM CROSSINGS.
15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED
IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS
COMPLETED.CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25
UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO
INTERMITTENT STREAM CROSSINGS.
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
THIS CHAPTER.
F. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED
WITH.CONTRACTOR TO ADHERE TO THE APPLICABLE STANDARD FOR
PRIVATE AND PUBLIC UTILITY INSTALLATION.
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 IS 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.CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ADJACENT
ROADS CLEAN FROM SOIL BUILD-UP.
18. ALL TEMPORARY EROSION AND SEDIMENT 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 VESCP 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.CONTRACTOR SHALL STABILIZE SITE, AND OBTAIN
INSPECTOR APPROVAL PRIOR TO REMOVING EC MEASURES. UPON
APPROVAL OF THE ENVIRONMENTAL INSPECTOR, INSTALL INFILTRATION
AREAS AND CONNECT ROOF DRAINS.
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 DURATION IN ACCORDANCE WITH THE
FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATION AND
RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL DESIGN
CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT
FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR
NATURAL OR MAN-MADE CHANNELS:THIS PROJECT DOES NOT INCLUDE
ANY ADDITIONAL IMPERVIOUS SURFACES AND THE PROJECT AREA WILL
BE RESTORED TO ITS EXISTING CONIDTIONS.THEREFORE WILL NOT
PRODUCE ANY ADDITIONAL STORMWATER RUNOFF.
A. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE
SHALL BE DISCHARGED DIRECTLY INTO 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 USING
THE VSMP CHANNEL PROTECTION CRITERIA. STORMWATER DISCHARGES
ARE CLASSIFIED INTO ONE OF THREE TYPES OF CHANNEL.
(1) "MANMADE STORMWATER CONVEYANCE SYSTEM" MEANS A
PIPE, DITCH, VEGETATED SWALE, OR OTHER STORMWATER
CONVEYANCE SYSTEM CONSTRUCTED BY MAN EXCEPT FOR
RESTORED STORMWATER CONVEYANCE SYSTEMS OR,
(A) THE MANMADE STORMWATER CONVEYANCE SYSTEM SHALL
CONVEY THE POST -DEVELOPMENT PEAK FLOW RATE FROM
THE TWO-YEAR EVENT WITHOUT CAUSING EROSION OF THE
SYSTEM DETENTION OF THE STORMWATER OR DOWNSTREAM
IMPROVEMENTS MAY BE INCORPORATED INTO THE APPROVED
LAND -DISTURBING ACTIVITY TO MEET THIS CRITERIA AT THE
DISCRETION OF THE STORMWATER PROGRAM ADMINISTRATIVE
AUTHORITY.
(B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED
STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE
SYSTEMS SHALL BE MET.
QDEVELOPED <= I.F. * (QPRE-DEV. * RVPRE-DEV.) /
RVDEVELOPED
UNDER NO CONDITION SHALL QDEVELOPED > Q PRE-DEV.
NOR SHALL QDEVELOPED BE REQUIRED TO BE LESS THAN
THAT
QFOREST * RVPRE-DEV.)/RVDEVELOPED
OR IN ACCORDANCE WITH ANOTHER METHODOLOGY THAT IS
DEMONSTRATED BY THE VSMP AUTHORITY TO ACHIEVE
EQUIVALENT RESULTS AND IS APPROVED BY THE BOARD.
(2) "NATURAL STORMWATER CONVEYANCE SYSTEM" MEANS THE
MAIN CHANNEL OF A NATURAL STREAM AND THE FLOOD -PRONE
AREA ADJACENT TO THE MAIN CHANNEL OR,
(3) "RESTORED STORMWATER CONVEYANCE SYSTEM" MEANS A
STORMWATER CONVEYANCE SYSTEM THAT HAS BEEN DESIGNED
AND CONSTRUCTED USING NATURAL CHANNEL DESIGN
CONCEPTS. RESTORED STORMWATER CONVEYANCE SYSTEMS
INCLUDE THE MAIN CHANNEL AND THE FLOOD -PRONE AREA
ADJACENT TO THE MAIN CHANNEL.
(A) THE DEVELOPMENT SHALL BE CONSISTENT, IN COMBINATION
WITH OTHER STORMWATER RUNOFF, WITH THE DESIGN
PARAMETERS OF THE RESTORED STORMWATER CONVEYANCE
SYSTEM THAT IS FUNCTIONING IN ACCORDANCE WITH THE
DESIGN OBJECTIVES.
(B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED
STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE
SYSTEMS SHALL BE MET. SEE 19(B)(1)(B).
sF SILT FENCE
CONSTRUCTION OF A SILT FENCE
(WITHOUT WIRE SUPPORT)
1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH
UPSLOPE ALONG THE LINE OF
STAKES.
6'MAX.
FLOW r
4-
3. STAPLE FILTER MATERIAL
TO STAKES AND EXTEND
IT INTO THE TRENCH.
4. BACKFD.L AND COMPACT
THE EXCAVATED SOIL.
SHEET FLOW INSTALLATION
(PERSPECTIVE VIEW)
SF/STONE NOT REQUIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL
POINTS A SHOULD BE HIGHER THAN POINT B.
cE CONSTRUCTION ENTRANCE
STONE CONSTRUCTION
ENTRANCE
70' MIN.
EXISTING
PAVEM\ENT
A
3,
5:1 V
-I
FILTER CLOTH 6' MIN. A
MOUNTABLE BERM
mnnGNAu
SIDE ELEVATION
EXISTING GROUND
70' MIN.
B WASHRACK
10' MIN.
(OPTIONAL)
1, 0' MIN.
12' MIN.
�- EXISTING
PAVEMENT
VDOT #1 POSITIVE DRAINAGE
10' MIN.
TO SEDIMENT
COURSE AGGREGATE TO
TRAPPING DEVICE
* MUST EXTEND FULL WIDTH
OF INGRESS AND EGRESS PLAN VIEW
OPERATION
12' MIN.
3" MIN.
;III -„III -
3' MIN.
FILTER CLOTH SECTION A -A
6'-7"
cv
REINFORCED CONCRETE
DRAIN SPACE
SECTION B-B
SOURCE: ADAPTED from 1983 Maryland Standards for Soil erosion and Sediment Control, and Va. DSWC Note 3.02-1
0INLET PROTECTION
BLOCK & GRAVEL CURB INLET
SEDIMENT FIL TER
CURB INLET
-�-� O
WIRE SCREEN
CONCRETE BLOCK
RU
WARTWITH
OVERFLOW
FILTERED WATER
SEDIMENT
M
.�;"
III-IIIIII=111�11
....:,.::
l
`elima
- =111III--IIIMIIIII Illal
=
II
THIS METHOD OF INLET PROTECTION IS APPLICABLE AT
CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY
TO PREVENT EXCESSIVE PONDING IN FRONT OF THE STRUCTURE.
* GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE
SOURCE: VA. DSWC
PLATE 3.07-8
OPERMANENT SEEDING FERTILIZATION
AND MAINTENANCE
TABLE 24
Maintenance Fertilization for Permanent Seedings
Use Soil Test Recommendation or Rates Shown Below
Seeding Mixture
Formulation
Lbs. per
Lbs. per
Time
Mowing
Acre
1000 sf
Tall fescue makes
10-10-10
500
11.5
Yearly, or as
`Not closer than 3" if
up 70% or more
or
400
9.2
needed fall
occasional mowing is
of cover.
30-10-10
desired.
Crownvetch
Spring the year
Do not mow crownvetch
Service lespedeza
0-20-0
400
9.2
following
establishment
Birdsfoot trefoil
and every 4-5
years thereafter.
Fairly uniform
Fall the year
Not required. not closer
stand of Tall
following
than 4" if occasional
Tescue & Service
5-10-10
500
11.5
establish- ment
mowing is desired, and
lespedeza, or
and every 4-5
then in fall after seed
Birdsfoot Trefoil.
years thereafter.
has matured.
Weeping
Spring the year
Not required. not closer
Lovegrass &
following
than 4" if occasional
Service lespedeza
5-10-10
500
11.5
establishment
mowing is desired, and
fairly uniform plant
and every 3-4
fall after sericea has
distribution
years thereafter.
matured.
Red & chewin s
g
20-10-10
250
5.8
September, 30
Mow no closer than 2"
for red fescue and Ky
fescue, Kentucky
days later
December, May
bluegrass; and closer
9
bluegrass, hard
9
20-10-10
100
2
20-June-30, if
than 3" for fescue.
fescue mixture:
.3
needed.
Ts TEMPORARY SEEDING MIXTURES FOR THE
PIFnMOKIT AREA
TABLE 26
TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES
Seeding
Rate
Planting
depth M
Seeding zones (Q and Seeding Date (3j
Species (1)
Per
1000
7a and 7b
6b
6a and 5b
acre
Sq. It
(Inches)
2/1-
5/1-
8/15-
3/1-
5/1-
8/15-
3/15-
6/1-
8/1-
4/30
8/14
11/30
4/30
8/14
11/15
5/31
7/31
10/31
Choose one:
BY
BY
BY
Barley
2.5 bu.
2.80
1-2
X
-
10/15
X
-
10115
X
-
10/1
Oats
3 bu.
2.21
1-2
X
-
-
X
-
-
X
-
-
Rye (4)
2.5 bu.
3.22
1-2
X
-
X
X
-
X
X
-
X
Barley or
Rye,
1501bs.
3.45
1
X
X
10115
X
X
10/15
X
X
10/1
Foxtail
X
X
X
X
X
X
X
X
X
millet 5
Weeping
4lbs.
0.09
1/4-1/2
-
X
-
-
X
-
-
X
-
Iovegrass
Annual
ryegrasS 501bs.
1.15 1/4-1/2 X - 11/1 X - 11/1 X -
8/15
Millet (7) 501bs.
1.15 1/2 - X - - X - - X
-
(1) Applicable on slopes of 3:1 or flatter
(2) Refer to figure A
- Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990
(3) Between fall and
spring seeding dates, use mulch only if ground is frozen and reseed when thawed
(4) May be used as
a nurse crop for late fall/early winter permanent seedings, add 56 Ibs/ac. to the permanent
seeding mixture
t4/ marylanc biaie Hignway Hammisiranon I emporary beec mix
(5) May be used as a nurse crop for mid -summer permanent seedlings. Add 2 Ibs/ac to permanent seed mix.
(6) May be used as a nurse crop for mid -summer permanent seedlings. Add 10 Ibs/ac. to the permanent seeding
mix.
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DATE:
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SCALE:
NA
JOB:
19.0867
SHEET: 3 OF 3