HomeMy WebLinkAboutWPO202200042 Plan - VSMP 2023-03-06BELVEDERE
PHASE 3 BLOCK 10
TMP 62A3 PARCEL 1 B
VSMP (TREE REMOVAL ONLY) PLAN
WPO#202200042
RIO MAGISTERIAL DISTRICT, COUNTY OF ALBEMARLE, VA
SITE DATA
OWNER/DEVELOPER :
GREENWOOD HOMES LLC
455 SECOND ST SE SUITE 201
CHARLOTTESVILLE, VA 22902
PLAN PREPARER:
ROUDABUSH, GALE, & ASSOCIATES
999 SECOND STREET
CHARLOTTESVILLE, VA. 22902
(434)-977-0205
TAX MAP PARCEL No:
062A3-00-00-001 BO
PARCEL AREA:
95.753 ACRES (GWAY BLA DB 5294-417)
ZMA PHASING:
PHASE III - "BLOCK 10"
ZONING: NEIGHBORHOOD MODEL DISTRICT (NMD) PER ZMA-2004-0007 WITH BELVEDERE CODE OF DEVELOPMENT,
AS LAST REVISED ON JULY 22, 2014.
CURRENT USE: VACANT
PROPOSED USE: 2 EXISTING TOWNHOMES FROM PHASE IV-2
26 TOWNHOMES (PROPOSED WITH BELVEDERE PHASE 3 BLOCK 10-A FINAL SITE PLAN SDP2019-79, "LOT A-G
FUTURE DEVELOPMENT') 14 TOWNHOMES (FUTURE SITE PLAN - "LOT H & I FUTURE DEVELOPMENT") 27 SINGLE
FAMILY DETACHED (THIS PLAN - ROAD PLAN) 69 TOTAL LOTS
MAGISTERIAL DISTRICT: RIO MAGISTERIAL DISTRICT
CRITICAL SLOPES: PRESERVED & MANAGED SLOPES PER ALBEMARLE COUNTY GIS.
CONSERVATION & PRESERVATION AREAS PER ZMA
WATERSHED: SOUTH FORK RIVANNA (BELOW RESERVOIR)
BOUNDARY SOURCE: PLAT"DIVISION OF DUNLORA" PREPARED BY WM. MORRIS FOSTER, LAND SURVEYOR, DATED NOVEMBER 1, 1985,
REVISED DECEMBER 20, 1985, RECORDED AT DB 875 PG 331. ROUDABUSH, GALE & ASSOCIATES 2020, DB5294-417,
& DB5289-658.
TOPOGRAPHY: BARE EARTH DEM FROM LiDAR, SOURCE VGIN (2016). POINT CLOUD FILTERED BY RGA, FEBRUARY 2021.
BENCHMARK: PK NAIL SET IN SIDEWALK AT THE CORNER OF BELVEDERE BLVD AND FOWLER STREET. ELEV = 476.50
DATUM HORZ: NAVD 83; VERT: NAVD 88
FLOODPLAIN THIS PROJECT IS PARTIALLY LOCATED WITHIN "ZONE X" AND PARTIALLY LOCATED "ZONE AE" AS SHOWN ON FLOOD
INSURANCE RATE MAP. COMMUNITY PANEL NUMBER 510003C 0279 D. EFFECTIVE DATE:FEBRUARY 4. 2005.
STREAM BUFFER: THE 100' STREAM BUFFER IS LOCATED ON TMP 62-2C WHICH IS WITHIN THE "BLOCK 10" AREA.
TOTAL DISTURBED AREA: 19.18 AC (TREE REMOVAL ONLY)
FOREST/OPENS SPACE/BMP's: 6.9 ACRES DEDICATED TO DEQ PRESERVATION EASEMENT (DB 5277 PG 305)
HUC NUMBER: 02080204
NOTE: PLAN IS REFERENCED BY AND ASSOCIATED WITH FDP 202300003
VICINITY MAP
SCALE: 1 "=1000 FEET
STORMWATER MANAGEMENT COMPLIANCE NARRATIVE
THE DEVELOPMENT OF BELVEDERE BLOCK 10 WILL OCCUR IN TWO PHASES OF CONSTRUCTION. THE COMPLETED
PROJECT WILL UTILIZE SHEET FLOW DISCHARGE TO FACILITATE CHANNEL AND FLOOD PROTECTION. STORMWATER
RUNOFF WILL BE COLLECTED AND CONVEYED AS SHEET FLOW.
9VA25-870-63 WATER QUALITY DESIGN CRITERIA REQUIREMENTS - THE PROJECT SATISFIES THE REQUIRED REDUCTION
OF ITS ANNUAL PHOSPHORUS LOAD THROUGH THE PRESERVATION OF FOREST/OPEN SPACE TO OFFSET INCREASE IN
PHOSPHORUS LOADING. 6.9 ACRES OF ON -SITE DEQ PRESERVATION EASEMENT (DB 5277 PG 305) IS ALREADY IN PLATTED
EASEMENT TOWARDS THIS PURPOSE.
9VA25-870-66.D REQUIREMENTS - THE PROJECT SATISFIES WATER QUANTITY REQUIREMENTS THROUGH THE RELEASE OF
ALL FLOW FROM THE SITE AS UNCONCENTRATED SHEET FLOW. MULCHING AREAS WHEREVER TREES ARE REMOVED
CREATES A POST -DEVELOPED CONDITION ON -SITE THAT RELEASES LESS FLOW THAT THE PRE -DEVELOPED CONDITION.
SEE DETAILED DISCUSSION ON SHEET 5 OF THESE PLANS.
EROSION AND SEDIMENT CONTROL NARRATIVE
THE EROSION AND SEDIMENT CONTROL IMPROVEMENTS CAN ADEQUATELY CONTROL EROSION AND OFFSITE
SEDIMENTATION USING DUST CONTROLS, A CONSTRUCTION ENTRANCE, SILT FENCE, AND TREE PROTECTION.
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 OF 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. CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ADJACENT ROADS CLEAN
FROM SOIL BUILD-UP.
TEMPORARY SILT FENCE SHALL BE APPLIED TO CLEARED AREAS WITHIN THE LIMITS OF TREE REMOVAL AFTER TREE
REMOVAL HAS OCCURRED ON ANY PORTION OF THE SITE. CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT
ALLOW ANY EROSION OR SEDIMENT TO EXIT.
APPROVED
by the Albemarle County
Community Development Department
Date 03/09/2023
File WP0202200042
Sheet List Table
Sheet Number Sheet Title
COVER SHEET
2
SOILS & EXISTING CONDITION PLAN
3
E & SC PLAN - TREE REMOVAL ONLY
4
SEEDING & STABILIZATION NOTES
5
EROSION & SEDIMENT CONTROL DETAILS
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EROSION & SEDIMENT CONTROL DETAILS
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Lic. No.
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03/06/23
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DATE:
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SCAL
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WPO
18438
FILE:
8438
SHEET:
1 OF 6
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1 \ N F NEW BELVEDERE INC �-� f D� ALBEMARLE COUNTY 9 1
1 / 51 3 PC 462 / / J j/ v� / \ ` / / // \\ / • / / \ \ \ 1� 1 I\\ \ �/ /// / • • / PRESERVED SLOPES I / / �S� /
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% • .� 0.4 \ '�' 1434- _ � ZONING: NMD � : ) \ � \ � \ ~ ._ � � % •rl � 1 % / � � � /\�
/ — ..'• • • ...�. • . •'\ \ - —' / 90.78 ACRES ` \ 1 \ \� \ ' / ' /
(TYP) — \ / -� `i J 438 J \ \ \ / /
EXISTING TREELINE TYP � \ � / ��• : ,�• •<�-- � /\� z440 `� � � i r -�. � � •� \ \ \ \ \ \ � ✓ / r � �t (' I ( l / / / `/ / /// i
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\ \ •� - EXISTING SECONDARY ACCESS / / / — r AREA (TYP) \ \ ••, ,,•��;g 92� \\ \\\\\\\\
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ROAD FROM BELVEDERE PHASE 5 / / I \ •� • • • • • / / 140�98 6, \
PROPERTY LINE \ • • — TO BE RELOCATED J HIS PLC �- / S rs� _i434 if / `• \ \ 1 •• L� •� D / (/ / (/ o µo d _ \\\ \ \\ \\\ \\zoo
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TMP62G-07-246 & TMP62G-07-245 \� �� •�•' �'J• �� �� > �' / ( •• ` �- \ \ \ \\\\ \\ \\\
ARE EXISTING LOTS TO BE BUILT WITH \ r t ° - • • \ • I \ \ \ \\ \\ \\
\ ,BELVEDERE PHASE IV-2. THESE TWO i e ✓� • ^. % / l � \ ` � • \ \ \ \ \\
�e �� • LOT ARE INCLUDED IN THE DENSITY \ �^ Z�B G / p p1•, r,--- \ ! j �• \ \ • �� ��/ \� \ \ \ 1 \\ 1\
1� CALCULATIONS FOR BLOCK 10 • • / I •�430 \ \ '•� — \ 1 \ 1
/ �\ / \ \ r. l •�• 1 , ( • \ \ — 434-
'00000
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PROPOSED WATERLINE CONNECTION POINT ` '� �-- � � r�' �� • � , • � •'' —` n .-� � � 2'rG � �•� \ Zr \ ,6� �\•• \ \ \ � �r .-� r \ \ \ I ,
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\ \\� o� ' • • \ \ 440 • / \ ` :- : • • / / --i • • • • • t I I \ 1 I
\\ \ ` ` ALBEMARLE COUNTY • \ • ! y ( / \ )
0 l 1 \ ` MANAGED SLOPES _ �• ~ -43 � ~ ••� '/ •1 1 \� \ 1 / ' / _ �Q� ZMA CONSERVATION \ I
o \ , \ 1 ( ) •y, 8 ) \ t S l \ \ • / • "Ore �f _ _ AREA (TYP) •1
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' EXISTING CURB, GUTTER, & � � \\ • � � 1 \\ / L • \ �- �.,: J ,Y � � � �" �• / I I I�' `
SIDEWALK TO BE REMOVED & \ FRS \�% `COI \\ / \ 10 BE 1 ( \ U,gt \ 430 / \ // \ ��� °\ / r • , \ • / I / I J
tir • • REBUILT PER THIS PLAN \'� . \ (R EQ 6 d d 5 ;' -\ I \ / ` f/ / /� / �r '-� • •� ; : / I (' (f l J (• 1
LEGEND �• \ 1�I I\�\ rf���� r��\ // /�� > 1�\�\� ���i \_- ���-��001
...:
�. ,\\\ \ 1 I / �a2y�r�� / 1 ALBEMARLE COUNTY
r SOILS INFORMATION: \ ���
PRESERVATION EASEMENT �rll �� mil\ ` \\ \� l J ` j \\\ \ \ �Zc'� PRESERVED SLOPES
L< DB. 5277 PG 305 / ` \� . to » F s>> )� \ \ \ \ I \ i \ \ \ / / (TYP) / v ✓ ti \\ \ \ / / L /
27B: ELIOAK LOAM, 2 TO 7 PERCENT SLOPES, �(` \ • \\ 1 1 ) !� S� �-� \ �� /
MORE THAN 80 INCHES TO RESTRICTIVE \ / \ \� \\^ \ \ \ \ I I 1 1 w \\ -� \ / / 1 \ \ /\/ / f Y \` \ \ T /Q�d/ I ( •
ALBEMARLE COUNTY STEEP FEATURES, WELL DRAINED, HYDROLOGIC i \ \� " \ 1 \ \ 1 \ \ \ I r \ \ / / �/ ` I ( \ \ / J 1 `� \ \ l \� i/ M ly // •� •
GROUP B. / '.:\
SLOPES OVERLAY -MANAGED /
27C: ELIOAK LOAM 7 TO 15 PERCENT SLOPES
MORE THAN 80 INCHES TO RESTRICTIVE
ALBEMARLE COUNTY STEEP FEATURES, WELL DRAINED, HYDROLOGIC FOWLER STREET TO BELVEDERE \k\ / \ \\, \\ \ \� \ ` `` / ` / l // ` \ ✓` 1 —
/
SLOPES OVERLAY- PRESERVED GROUP B. PHASE 5A DEVELOPMENT. �� \\ \ < \ �-
\ \ 1 \\ t \ r -1
/SUB-2019-00170 \ \ \\ iMP 6 �6D ✓ =
Y \ •� \ N/F BELVEDERE LAND HOLDINGS LLC f \\_\�\ �\ w / ✓// —
39D: HAZEL LOAM, 15 TO 25 PERCENT SLOPES, / / / \ \\ • B ,088 PG 6 5
ZMA CONSERVATION AREA 20-40 INCHES TO RESTRICTIVE FEATURES, I :I I -/ \\ , \ / \ \�\\� �\
EXCESSIVELY DRAINED HYDROLOGIC GROUP B. �\
/
\,;•\ • • � \\ \\ \EXISTING SANITARY SEWER —390
I I \\ \ • \ \\ \\ \\ \\ \� ss¢S. T �� /�/ // / (SEE "BELVEDERE PHASE 5B
40E: HAZEL LOAM, 24 TO 45 PERCENT SLOPES, • • • \ / J r
• \ \\\\\\\\\\ \\ \�. 3 y C\ i / g0 OFF -SITE SANITARY SEWER")
ZMA PRESERVATION AREA MORE THAN 80 INCHES TO RESTRICTIVE I • •\ \\\ \\� �� �_ / _� �- — �380
FEATURES, EXCESSIVELY DRAINED, I , \ •\'_ \ • // �• \\\\ \ \\ \ \ _ / / //
HYDROLOGIC GROUP B. I I • \ • \\
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/\ " . r� •s \� \ • \ \ \ \\ \\\\ \� �� ALBEMARLE COUNTY\
PRESERVED SLOPES
BTL: BUILD -TO -LINE '\� \/ , \ / \ \ \\\\\\\\\ (TYP)
OS: OPEN SPACE
50 0 50 100 150a
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PRODUCTION:
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DATE:
21 23
SCALE:
1" = 50'
WPO:
8438
FILE:
8438
SHEET:
2 OF 6
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NOTES:
1. TREES >3" DIA AT CHEST HEIGHT MAY NOT BE CUT,
APR 1- NOV 14, OF ANY YEAR (TOYR), PER ESA SECTION
7 SPECIES -SPECIFIC PROTECTIONS FOR THE NORTHERN
LONG EARED BAT (NILES), PENDING FURTHER USFWS
GUIDANCE.
2. ALBEMARLE REQUIRES MULCH COVER FROM
CHIPPING LIMBS ON -SITE FOR ANY AREA LOGGED ,AND
REQUIRES MULCH GROUND COVER FOR 50' (MIN.)
WIDTH UPSLOPE OF ANY TREE PROTECTION FENCING,
AND UPSLOPE OF ANY LIMIT OF TREE -CLEARING.
3. COUNTY ESC INSPECTOR MAY DIRECT PLACEMENT
OF ADDITIONAL ESC MEASURES NOT SHOWN IF
DEEMED NECESSARY TO CONTROL OR LIMIT EROSION
AND OFF -SITE SEDIMENT TRANSPORT DURING OR
AFTER TREE -CLEARING.
4. NO CUTTING OF TREES IS PERMISSIBLE WITHIN
JURISDICTIONAL WETLAND AREAS WITHOUT U.S. ARMY
CORPS OF ENGINEERS APPROVAL. JURISDICTIONAL
WETLAND AREAS ARE IDENTIFIED, AND LABELED.
5. SILT FENCE IS NOT REQUIRED AS A PRELIMINARY ESC
CONTROL MEASURE, UNLESS REQUESTED BY COUNTY
ESC INSPECTOR.
6. TREE PROTECTION IS A REQUIRED PRELIMINARY
PERIMETER ESC CONTROL MEASURE - LAND CLEARING
DELINEATION MEASURE.
7. TREE PROTECTION MEASURES ARE TO BE
MAINTAINED THROUGHOUT THE COURSE OF THE
PROJECT AND ARE TO BE REPLACED IF DAMAGED.
8. DURING NLEB TIME OF YEAR RESTRICTION, PRIOR TO
CUTTING ANY TREES, OPERATOR SHALL EXAMINE FOR
POTENTIAL BAT HABITAT DAILY AND PRIOR TO
EXPANDING TREE CLEARING INTO ANY NEW AREAS. (IE.
LIVING TREES OR SNAGS GREATER OR EQUAL TO 3
INCHES IN DIAMETER AT BREAST HEIGHT THAT HAVE
EXFOLIATING BARK, CRACKS, CREVICES, OR CAVITIES),
AS WELL AS FORESTED LINEAR FEATURES SUCH AS
WOODED FENCE -ROWS, RIPARIAN FORESTS, AND
OTHER WOODED CORRIDORS. WHEN/IF
1.
\\ _
TP r -- TS
>\CR \� - ��� �_ �J� TS MU \ - 1 I
,- ` WOOD CHIP MULCH & 1 I I . J . ^ .�. jj/
TEMPORARY SEEDING l I / /// / , i —408 -
µl �N 1� 410
,4 ° ;...... / SHALL BE INSTALLED ON 1 `...� //�// ��-\MU 4Q,
f M U TS CONCRETE WASH -OUT AREA r, — — J 44 M U TS ALL AREAS WITHIN LIMITSTS
OF CLEARING.Iri
TP
SET-UP AREA FOR TREE REMOVAL
...., 4 -- -434 \ \ \ \ TS M U
OPERATIONS � �-�--•--� � )
FUEL STATION l
DUMPSTER ' ✓ .,��� �-� f� - ,•; l WOOD CHIP MULCH & DC
} : y, j....::: \ PORTA-POTTY
'.. :.::::...... \ \ \ TEMPORARY SEEDING I NOTE: THE TREE PROTECTION/LIMITS 1 \ \ \ \
SPILL CONTAINMENT AREA i
I:: ::.�: �\ \\ \ SHALL BE INSTALLED ON ,� . OF CLEARING SHOWN HERE ��--� ., � --� � � � � � � � I .............
\ CR �\ ALL AREAS WITHIN LIMITS 1 I TREE CLEARING ONLY. / /
WASH RACK & EQUIPMENT/VEHICLE \\ �r-- REPRESENTS THE AGREED -UPON LIMIT ) \ MULCH ALL AREAS WITHIN f//
WASHING Soso\..\ CONSTRUCTION TRAILER OF CLEARING. — APPROVED BY THE COUNTY TO I I
EROSION CONTROL PLAN LEGEND
3.02 NTRANCE TI N CE
ROAD STABILIIZATION CRS cas
SILT FENCE SF
3.1 PROTECTION TLET MOP
3.31 TEMPORARY SEEDING TS —Ts—
MULCHING MU
AND PROTECTION N TP
3.3 DUST CONTROL DC —Oc—
& TREE REMOVAL
`REFERENCE THE LATEST VERSION OF THE VIRGINIA
EROSION AND SEDIMENT CONTROL HANDBOOK
(VESCH) FOR DETAILS REGARDING INDIVIDUAL
CONTROL MEASURES.
\ TS s \<, REPRESENT THE ZONING MAP
\ — : AMENDMENT.
.:.:� �\
O 9?
\ ........... �-- I
TR L TO B E`4 l � l \ �
\��� •. �\ ELO ACTED ! S ) J / \ \�440�� / \\ I \ ~ ~ y 30` \
\ \\ TS
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`::::/ ,' \ ) �l J }...I.( t MU WOOD CHIP MULCH &
%/ // .:✓ / \ \\ ...... t i ( / ... �� \ �� TEMPORARY SEEDING T MU .....� .. .
^ �� \ TS SHALL BE INSTALLED ON J S f
\\ 1 1 (I / f LIMITS OF TREE CLEARING 'f
\ \
-tr �1� \ . \:::1::::..., :,.� \ \\ , �1 1 \ \ MU ALL AREAS WITHIN LIMITS ,_ 10 I Q or'R�c,
IVW
ENCOUNTERED, IMMEDIATELY CONTACT OPERATOR \;\ C \ \\ \\ \l �\ . \`. . ) . . /� O F CLEARING.
/ = �- --� �� l �--
LISTED IN REGISTRATION. l J
9. THERE SHALL BE NO GRADING, GRUBBING, OR TREE \ \ I
ROOT REMOVAL AND ALL STUMPS SHALL BE LEFT 2-3
FEET ABOVE EXISTING GRADE. EVERY ATTEMPT SHALL
BE MADE TO PRESERVE THE UNDERSTORY TREES AND
VEGETATION DURING TREE HARVESTING OPERATIONS.
10. MULCHING SHALL ALSO BE IMPLEMENTED TO
MINIMIZE THE OFFSITE TRANSPORT OF TREE
HARVESTING BY-PRODUCT.
11. INSTALLATION, INSPECTION AND MAINTENANCE OF
THESE MEASURES SHALL OCCUR BI-WEEKLY AND
AFTER EACH RAINFALL EVENT TO ENSURE THEIR
FUNCTIONALITY.
12. CRITICAL SLOPES TO BE FENCED OFF PRIOR TO
STARTING CONSTRUCTION. PROPOSED PRELIMINARY
LIMITS OF TREE HARVEST AREA ARE CONCURRENT
WITH, AND DO NOT ENCROACH INTO THE CRITICAL
SLOPES.
13. TREE PROTECTION SHALL BE IMPLEMENTED ON
UPHILL SLOPES WHERE APPLICABLE OR AS DIRECTED
TO PRESERVE STANDS OF TREES THAT SHALL REMAIN.
14. PRESERVED STEEP SLOPES (>25%) TO BE MARKED
IN THE FIELD BY CONTRACTOR PRIOR TO LAND
DISTURBANCE.
15. FIELD MARKERS DELINEATING PRESERVED STEEP
SLOPES ARE TO BE MAINTAINED THROUGHOUT THE
COURSE OF THE PROJECT AND ARE TO BE REPLACED IF
DAMAGED.
16. NO PERMANENT OR TEMPORARY DISTURBANCE OF
PRESERVED STEEP SLOPES IS PERMISSIBLE.
17. TOTAL TREE HARVEST AREA = 19.18 ACRES.
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Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
ESTABLISHMENT OF VEGETATIVE COVER
Developing a fertile soil is a crucial step in the establishment of vegetation, which can reduce the
amount of fertilizer required to maintain good vegetative cover. A fertile soil has the capacity to
supply the nutritional needs of the plants being established. Good soil quality characteristics
include good soil texture, adequate nutrients available for plant growth, good moisture holding
capacity, and the appropriate soil acidity/alkalinity balance (pH). The following is a discussion
of the steps needed to ensure good vegetative growth.
1. Soil Tests
Soil tests are extremely important and should be conducted on every site. Soil tests provide
specific information on the amounts of phosphorus, potassium, calcium and magnesium
available for plant uptake and recommends additional amounts as required. Soil tests are crucial
for determining the amount of lime needed to obtain an appropriate soil pH for the vegetation
being established. Soil test results include recommendations specific to the site and vegetation
being grown. Soil tests recommend the amount of plant nutrients and lime needed to promote
and maintain good plant growth. Soil tests may be performed by the Cooperative Extension
Service Soil Testing Laboratory at VPI & SU, or by a reputable commercial laboratory. Also
note that County Extension offices have soil testing supplies and information.
Soil tests are not used to determine nitrogen needs. Nitrogen is applied based upon established
requirements for the plant to be grown, season of growth, and intended use.
2. Surface Roughening
Provide a rough soil surface by stair -step grading, grooving, or tracking the soil to be vegetated
or by leaving slopes in a roughened condition by not fine -grading, in accordance with the 1992
Virginia Erosion & Sediment Control Handbook (Std & Spec 3.29). Seed germination is difficult
with compacted soils. Rough, loose soil surfaces helps prevent the loss of lime and fertilizer due
to runoff, increases water infiltration, and provides seed coverage, which aids in seed
germination.
3. Soil Amendments & Soil Quality
Materials such as sand, vermiculite, peat, and compost may be added to soil to modify texture,
improve structure and increase the moisture holding capacity. It is also recommended to
conserve existing soil quality by preserving and reapplying topsoil in accordance with the 1992
Virginia Erosion & Sediment Control Handbook (Std & Spec 3.30). Areas that have been
compacted, or where duff or underlying topsoil is removed, should be amended with compost to
improve soil quality.
4. Lime
Adjusting the soil pH between 6.25 to 6.5 is extremely important for grass establishment,
especially in the acidic soils of Virginia. A soil test is necessary to determine the actual amount
of lime required to adjust the soil pH of denuded sites. However, when a soil test has not been
performed, apply 2-tons/acre (90 pounds per 1,000 square feet) of pulverized agricultural grade
limestone.
Revised 7/17/03 Page 2 of 8
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
5. Fertilizer
Never apply more than 1 pound of water soluble nitrogen per 1,000 square feet within a 30 day
ep riod. Nitrogen should be applied based upon established requirements of the plant to be grown,
season of growth, and intended use. Establishing a uniform dense vegetative cover with a good
root system reduces the potential for pollution by decreasing erosion and runoff, increasing the
plants ability for nutrient uptake, and reducing pesticide use. A detailed discussion on fertilizer
use is provided in the `Updated Fertilizer Specifications and Rates for Establishment' section of
this bulletin.
6. Incorporation
Incorporate the lime and fertilizer into the top 4 - 6 inches of the soil by discing or by other
means. Incorporation reduces the potential nutrient loss due to runoff, as well as significantly
increasing the success of establishing a vegetative cover. When surface roughening does not
occur prior to the application of lime and fertilizer, `mix' the lime and fertilizer into the soil, at
least 4 inches, by the methods described in the 1992 Virginia Erosion and Sediment Control
Handbook (Std & Spec 3.29).
When incorporation does not occur, and fertilizer and lime is applied directly to a smooth
surface, the phosphorus (P205) application rate must be reduced by half because of the limited
contact area with soil and the risk of nutrients being lost in runoff.
7. Seeding
Selection of plants is based on climate, topography, soils, land use and the planting season. The
1992 Virginia Erosion and Sediment Control Handbook vegetative cover standards and
specifications 3.31 Temporary Seeding, 3.32 Permanent Seeding, 3.33 Sodding, and 3.34
Bermudagrass & Zoysiagrass, describe in detail the specifications for plant selection. In
addition, attached are one -page updates to the vegetative cover standards and specifications,
which provide updated fertilizer and lime rates and the seeding schedules for the different
physiographic regions of Virginia.
8. Mulching
The application of mulch to the soil surface, for both temporary and permanent seeding, is one of
the most effective means of controllingrunoff and erosion on disturbed land. All permanent
seeding must be mulched immediately upon completion of seed application. It is especially
important to mulch liberally in mid -summer and prior to winter. Mulching prevents erosion, and
thereby pollution, by protecting the soil surface and fostering the growth of vegetation by
increasing the moisture content and providing insulation from extreme temperatures. The 1992
Virginia Erosion and Sediment Control Handbook (Std & Spec 3.35) details the mulch
specifications and includes a list of the typical materials used to mulch (for example straw, wood
chips, and fiber mulch).
Revised 7/17/03 Page 3 of 8
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
9. Hydroseeding
Hydroseeding is a mechanical method of applying seed, fertilizer, and mulch to land
development sites in one step. This method is efficient in providing an immediate cover to
denuded sites; however, the surface must be carefully prepared in order for successful seed
germination. Hydroseed on rough, loose surfaces only. Roughen the surface prior to application
of hydroseeding, per the specification above and in accordance with the 1992 Virginia Erosion &
Sediment Control Handbook (Std & Spec 3.29). Although proper soil pH is crucial in
establishing good vegetative cover, lime is usually not included in the hydroseed mix. Therefore,
lime should be incorporated into the soil as needed when preparing the site for hydroseeding.
To avoid poor seed germination as a result of seed damage during hydroseeding, it is
recommended that if the machinery breaks down from 30 minutes to 2 hours, 50% more seed
must be added to the tank. Beyond 2 hours, a full rate of new seed is usually necessary.
UPDATED FERTILIZER SPECIFICATIONS AND RATES FOR ESTABLISHMENT
Plant nutrients should be applied based upon established requirements of the plant to be grown,
season of growth, and intended use, as specified in the 1992 Virginia Erosion and Sediment
Control Handbook (Std & Spec 3.31, 3.32, 3.33, and 3.34). The timing and rate of fertilizer
application depends on the type of grass. There are basically two types of grasses, warm and cool
season grasses. Warm season grasses (Bermuda, Zoysia) are those that go dormant in the winter.
Cool season grasses (Fescue, Bluegrass) are those that stay green year round.
1. Recommended Season for Applying Nitrogen Fertilizers
The earliest spring application of nitrogen for cool season grasses is six weeks prior to the last
average frost date (for example, February 6 for Virginia Beach and March 1 for Roanoke). The
latest fall application of nitrogen for cool season grasses is six weeks after the first average frost
date (for example, December 29 for Virginia Beach and December 1 for Roanoke).
The earliest spring application of nitrogen for warm season grasses is the last average frost date
for the region (for example, March 20 for Virginia Beach and April 15 for Roanoke). The latest
fall application of nitrogen for warm season grasses is 30 days prior to the average first frost
date for the region (for example, October 15 for Virginia Beach and September 20 for Roanoke).
2. Per Application Rates
Phosphorus (P) and potassium (K) fertilizer requirements should be determined by a soil test.
Never apply more than one (1) pound of water soluble nitrogen per 1,000 square feet within a 30
day period. The following table itemizes the fertilization rate revisions to standards and
specifications 3.31 Temporary Seeding, 3.32 Permanent Seeding, 3.33 Sodding, and 3.34
Bermudagrass & Zoysiagrass Establishment.
Revised 7/17/03 Page 4 of 8
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
Summary of Fertilizer Specification Revisions for Establishment of Turf
3. Using Fertilizer Analysis to Calculate Nitrogen Rates
All fertilizer packages have three numbers present on the package (for example, 10-10-10 or 16-
4-8). These three numbers indicate the percentage of nitrogen (N), phosphorus (P205), and
potash (K20) present by weight which is called the N-P-K ratio. For example, a 20 pound bag of
10-6-4 is 10 percent nitrogen (2 lb. of N), 6 percent phosphate (1.2 lb. of P205), and 4 percent
potash (0.8 lb. of K20) the remaining is inert material to facilitate even application of fertilizer.
The Virginia nutrient management recommendation is to apply no more than 1 lb. of nitrogen per
1,000 square feet within a 30 day period. A fertilization rate of 1 lb. of nitrogen per 1,000 square
feet can be obtained for any site by using the fertilizer analyses on the bag and knowing the area
of application.
Revised 7/17/03 Page 5 of 8
2003 Urban Nutrient Management Technical
Standards & Specifications
Bulletin
3.31 Temporary Seeding
10-10-10 fertilizer applied at a rate of 450 lbs. /
acre or 10 lbs. / 1,000 ft2
Mixed Grasses &Legumes
10-20-10 fertilizer applied at a rate of 500 lbs. /
acre or 12 lbs. / 1,000 ft2
Apply the equivalent of 100 lbs. of phosphate
3.32 Permanent Seeding
9
Legume stands only
(p205) and 100 lbs. of Potash (K20) per acre.
NO NITROGEN N
Grass stands only
10-20-10 fertilizer applied at a rate of 500 lbs. /
acre or 12 lbs. / 1,000 ft2
10-10-10 fertilizer applied at a rate of 450 lbs. /
acre or 10 lbs. / 1,000 ft2. NOTE: For cool
3.33 Sodding
season grasses apply fertilizer in fall or spring.
For warm season grasses apply the fertilizer in
late spring or summer only.
10-10-10 fertilizer applied at a rate of 500 lbs. /
acre or 12 lbs. / 1,000 ft2. Apply additional
3.34 Bermudagrass & Zoysiagrass Establishment
phosphorus and potassium 30-60 days later
based on the soil test. Apply an additional
equivalent of 1 Ib./1,000 ft`of nitrogen when
the P & K are applied.
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
Fertilizer Bag
Reads:
Amount to Fertilizer to Apply
1 lb. of nitrogen / 1000 sq.ft.
6-2-0
16.6 lb.
10-10-10
10 lb.
16-4-8
6.2 lb.
20-5-5
5 lb.
22-3-14
4.5 lb.
29-3-7
3.4 lb.
Use of Slowly Available Forms of Nitrogen
utilizer bags will state the source or category from which the nitrogen is derived. Nitrogen
rtilizers have two categories: Water Soluble Nitro en i.e. all nitrogen is immediate)
g g ( � g Y
ailable); and Slowly Available Nitrogen (i.e., nitrogen is available over an extended period of
ne). The nitrogen source impacts how grass is fertilized and the rate and timing of application
fertilizer.
ioose a fertilizer that has some amount of Slowly Available Nitrogen (SAN). Slowly available
rogen fertilizers make nitrogen available a little at a time, the way most grasses need it, which
iuces both the potential of excess nutrients in runoff and the leaching potential of excess
trients into groundwater. Sources of SAN are usually stated on the label. It may be stated as
Water Insoluble Nitrogen (WIN), sulfur -coated urea, natural organic nitrogen or other
strolled release materials used to coat the fertilizer. The % WIN is usually stated on the
tilizer container, if the % WIN is not listed, assume that all the nitrogen in the fertilizer is
[ter soluble and immediately available. As a general guideline, if the fertilizer has 50% WIN
less, it should be applied in the same manner as readily available nitrogen. If the fertilizer is
% WIN or greater, it should be applied as a SAN.
UPDATED FERTILIZER SPECIFICATIONS AND RATES FOR MANAGEMENT
1. Application of Fertilizer for Maintenance
Apply fertilizer when grass is actively growing and can utilize the nutrients. Summer is best for
warm season grasses (zoysiagrass and bermudagrass) while the fall months are best for cool
season grasses (tall fescue, Kentucky bluegrass, perennial ryegrass).
Annual Application Rates
A. When applying 100% Water Soluble Nitrogen sources (those that have all the nitrogen
immediately available for plant use), the following rates apply:
• Never apply more than one (1) pound of water soluble nitrogen per 1,000 square feet
within a 30 dayperiod
• No more than 3.5 lbs. of nitrogen per 1,000 square feet annually on cool season grass.
• No more than 4.0 lbs. of nitrogen per 1,000 square feet annually on warm season
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
B. When applying slowly available nitrogen (SAN, WIN, sulfur -coated urea, natural organic
nitrogen or other controlled release materials), total annual nitrogen application rates may
be adjusted incrementally by referring to the following figure. The maximum annual
nirogen rates when using 50% or greater SAN is as follows:
• No more than 5.0 lbs. of nitrogen per 1,000 square feet annually on cool season grass.
• No more than 5.5 lbs. of nitrogen per 1,000 square feet annually on warm season
grass.
Erosion & Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
C. When anplving maintenance fertilizer on established sod.
Pounds of nitrogen per 1,000 sq. ft. if the fertilizer is less than 50 percent WIN
Month
Type of Grass
Tall Fescue
Perennial Rye
Kentucky
Blue rass
Bermudagrass
Zoysiagrass
Se [ember
1
1
0
0
October
1
1
0
0
Earl November
0
0
0
0
April
0
0
0
0
May
0-0.5
0-0.05
1
1
June
0
0
1
0
July/August
0
0
0
1
Year) Lbs. N/1000 sf
2.5
2.5
2
2
Pounds of nitrogen per 1,000 sq. ft. if the fertilizer is more than 50 percent WIN
Month
Type of Grass
Tall Fescue
Perennial Rye
Kentucky
Bluegrass
Bermudagrass
Zoysiagrass
August 15
1.5
1.5
0
0
October 1
1.5
1.5
0
0
April
0
0
1.5
1.5
May 15
0
0
0
0
June
0
0
1.5
1.5
Year) Lbs. N/1000 sf
3
3
3
3
Erosion &Sediment Control Technical Bulletin No. 4
Nutrient Management for Development Sites
C. When anplving maintenance fertilizer on established sod.
Pounds of nitrogen per 1,000 sq. ft. if the fertilizer is less than 50 percent WIN
Month
Type of Grass
Tall Fescue
Perennial Rye
Kentucky
Bluegrass
Bermudagrass
Zoysiagrass
September
1
1
0
0
October
1
1
0
0
Earl November
0
0
0
0
April
0
0
0
0
May
0-0.5
0-0.05
1
1
June
0
0
1
0
July/August
0
0
0
1
Year) Lbs. N/1000 sf
2.5
2.5
2
2
Pounds of nitrogen per 1,000 sq. ft. if the fertilizer is more than 50 percent WIN
Month
Typ e of Grass
Tall Fescue
Perennial Rye
Kentucky
Bluegrass
Bermudagrass
Zoysiagrass
August 15
1.5
1.5
0
0
October 1
1.5
1.5
0
0
April
0
0
1.5
1.5
Ma 15
0
0
0
0
June
0
0
1.5
1.5
Year) Lbs. N/1000 sf
3
3
3
3
TABLE 3.31-B
(Revised June 2003)
TEMPORARY SEEDING SPECIFICATIONS
QUICK REFERENCE FOR ALL REGIONS
SEED
APPLICATION DATES
SPECIES
APPLICATION RATES
Sept. 1 -Feb. 15
50/50 Mix of Annual Ryegrass (lolium multi-
florum) &Cereal (Winter) Rye (Secale cereals)
50 -100 (lbs/acre)
Feb. 16 -Apr. 30
Annual Ryegrass (lolium multi-florum)
60 - 100 (lbs/acre)
May 1 -Aug. 31
German Millet
50 (Ibs/acre)
FERTILIZER &LIME
• Apply 10-10-10 fertilizer at a rate of 450 lbs. /acre (or 10 lbs. / 1,000 sq. ft.)
• Apply Pulverized Agricultural Limestone at a rate of 2 tons/acre (or 90 lbs. / 1,000 sq. ft.)
1 - A soil test is necessary to determine the actual amount of lime required to adjust the soil pH of site.
2 -Incorporate the lime and fertilizer into the top 4 - 6 inches of the soil by disking or by other means.
3 - When applying Slowly Available Nitrogen, use rates available in Erosion &Sediment Control Techr
# 4.2003 Nutrient Management for Development Sites at hftp://www.dcr.state.va.us/sw/e&s.htm#Dubs
TABLE 3.32-C
(Revised June 2003)
PERMANENT SEEDING SPECIFICATIONS FOR APPALACHIANIMOUNTAIN AREA
SEED
LAND USE
SPECIES
APPLICATION RATES
Tall Fescue'
90-100%
Minimum Care Lawn
Perennial Ryegrass2
0-10%
(Commercial or Residential)
Kentucky Bluegrass'
0-10%
TOTAL: 200-250 lbs.
Minimum of three (3) up to five (5) varieties
High -Maintenance Lawn
of Kentucky Bluegrass from approved list
TOTAL: 125 lbs.
for use in Vir inial
Tall Fescue
128 lbs.
General Slope (3:1 or less)
Red Top Grass or Creeping Red Fescue
Seasonal Nurse Crop
2 lbs.
20 lbs.
TOTAL: 150 lbs.
Tall Fescue'
108 lbs.
Low -Maintenance Slope
Red Top Grass or Creeping Red Fescue
Seasonal Nurse Crop3
2 lbs.
20 lbs.
(Steeper than 3:1)
Crownvetch"
20 lbs.
TOTAL: 150 lbs.
1 -When selecting varieties of turfgrass, use the Virginia Crop Improvement Association (VCIA) recommended
turtgrass variety list. Quality seed will bear a label indicating that they are approved by VCIA. A current turtgrass
variety list is available at the local County Extension office or through VCIA at 804-746-4884 or at
http://sudan. cses.vt. edu/htm I/Tu rf/turf/ou bl ication s/ou blications2. htm I
2 -Perennial Ryegrass will germinate faster and at lower soil temperatures than Tall Fescues, thereby providing
cover and erosion resistance for seedbed.
3 -Use seasonal nurse crop in accordance with seeding dates as stated below:
March, April -May 15"' ......................... Annual Rye
May 161h -August 15"' ......................... Foxtail Millet
August 16"' -September, October ........... Annual Rye
November- February ............................. Winter Rye
4 -All legume seed must be properly inoculated. If Flatpea is used, increase to 301bs/acra. If Weeping
Lovegrass is used, include in any slope or low maintenance mixture during warmer seeding periods, increase to
30 -40 lbs/acre.
FERTILIZER &LIME
• Apply 10-20-10 fertilizer at a rate of 500 lbs. /acre (or 12 lbs. / 1,000 sq. ft.)
• Apply Pulverized Agricultural Limestone at a rate of 2 tons/acre (or 90 lbs. / 1,000 sq. ft.)
- A soil test is necessary to determine the actual amount of lime required to adjust the soil pH of site.
- Incorporate the lime and fertilizer into the top 4 - 6 inches of the soil by disking or by other means.
- When applying Slowly Available Nitrogen, use rates available in Erosion & Sediment Control Technic
# 4. 2003 Nutrient Management for Development Sites at http://www.dcr.state.va.us/sw/e&s.htm#pubs
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Date: 3/2/2023 conrtant values r 1
BMP Design Sped1irotlons List: 2013 Draft Stds &Specs okulation cells �M'7/
1992 3.05 1. SET POSTS AND EXCAVATE 2. STAPLE WIRE FENCING TO THE 11L�-11
A4%4"TRENCH UPSLOPE POSTS Site Information
ALONG THE LINE OF POSTS
CONSTRUCTION OF A SILT FENCE O
(WITHOUT WIRE SUPPORT Post -Development Project (Treatment Volume and Loads) Z
1. SET THE STAKES. 2. EXCAVATE A 47X 4" TRENCH
UPSLOPE ALONG THE LINE OF / land Cover (acres) O O1 rn 2
STAKES. A sons B sons c Sons D sons Totals 0 w N uo O
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Target Rainfall Event(indies) 1.00 *_r!
e 0.02 D.D3 0.04 0.05
Ill III Total Phosphorus (TP)EMC(mg/L) 0.26 0.15 D.2D 0.22 0.25 d w U
Total Nitrogen (TN) EMC(ri 1.86 0., D.15 0.95 D.95 to
4!' Target TPLoad(lb/acre/w) 0.41 Q
STAKES AND EXTEND THE EXCAVATED SOIL. AND COMPACT 4. BACKFILL AND COMPACT 3. ATTACH THE FILTER FABRIC TO Pj limitless correction factor) 0.90
TO 3. STAPLE FILTER MATERIAL 4. BACK THE WIRE FENCE AND EXTEND
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Post -Development Requirement for Site Area
° '�(' TP Load Reduction Required (Ib/yr) 0.92 O
• . ST DEVE LOP
FLOW/ Land Cover Summary Treatment Volume and Nutrient Loads
FLOW 11- Treatment Volume
III I III Forest/Open Space Cover(acres) 0.00 0.3209
(acre-ft)
SHEET FLOW INSTALLATION III �I III �II ' Weighted Rv (forest) 0.00 Treatment Volume (cubic feet) 13,979
(PERSPECTIVE VIEW)
%Forest 0% TP Load (Ib/yr) 8.78
EXTENSION OF THE FABRIC AND WIRE INTO THE TRENCH Managed Turf Center (acres) 19.16 TN Load Db/yr) 62.83
Informationalpur uses Onl
3,a,. Weighted Rv (turf) 0.20
A I A
FLOWI B I ��\ FILTERFABRIC %Managed Turf 100%
/ 1 Impervious Coser(acres) 0.02
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DRAINAGEWAY INSTALLATION Ste A ea (acres) 19.18 rr
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Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-2 STORMWATER MANAGEMENT COMPLIANCE NARRATIVE �, W W
SF SILT FENCE DETAIL (W/ WIRE SUPPORT) o 2 2
HI - 2S NOT TO SCALE 3.05-1 THE DEVELOPMENT OF BELVEDERE BLOCK 10 WILL OCCUR IN TWO PHASES OF CONSTRUCTION. THE w 00
COMPLETED PROJECT WILL UTILIZE SHEET FLOW DISCHARGE TO FACILITATE CHANNEL AND FLOOD LU U U
PROTECTION. STORMWATER RUNOFF WILL BE COLLECTED AND CONVEYED AS SHEET FLOW.
Z Z
9VA25-870-63 WATER QUALITY DESIGN CRITERIA REQUIREMENTS - 00
1992 3 SILT FENCE OUTLET DETAIL THE PROJECT SATISFIES THE REQUIRED REDUCTION OF ITS ANNUAL PHOSPHORUS LOAD THROUGH THE m LL LL
(SPECIAL DESIGN) SILT PRESERVATION OF FOREST/OPEN SPACE TO OFFSET INCREASE IN PHOSPHORUS LOADING. 6.9 ACRES OF Q Q
FENCE ON -SITE DEQ PRESERVATION EASEMENT (DB 5277 PG 305) IS ALREADY IN PLATTED EASEMENT TOWARDS THIS
Maintenance Ti� PURPOSE.
I Z Q N N
1. Silt fences shall be inspected immediately after each rainfall and at least daily during 9VA25-870-66.D WATER QUANTITY REQUIREMENTS - o N
EXIST.
prolonged rainfall. Any required repairs shall be made immediately. GROUND 01 'i EXIST. M M
ELEV. TABLE 2-2C OF THE TR-55 MANUAL WAS CONSULTED. THE PRE -DEVELOPED STATE OF THE LAND CAN BE
2. Close attention shall be paid to the repair of damaged silt fence resulting from end o_ _ _ ELEV. CHARACTERIZED AS "WOODS IN GOOD CONDITION". THE POST -DEVELOPED STATE OF THE LAND CAN BE Oz N
runs and undercutting. CHARACTERIZED AS "BRUSH - BRUSH/WEED/GRASS MIXTURE WITH BRUSH THE MAJOR ELEMENT" PER
OUTLET CROSS SECTOIN DISCUSSION WITH THE COUNTY ON 2-17-23, THIS EQUATES WITH THE MULCHED CONDITION OF THE LAND AFTER
3. Should the fabric on a silt fence decompose or become ineffective prior to the end 10 CLEARING AND MULCHING HAVE BEEN PERFORMED. ALL SOIL ON SITE IS HYDROLOGIC SOIL GROUP "B". DRAFTER: AGF
of the expected usable life and the barrier still be necessary, the fabric shall be 12„ ACCORDING TO TABLE 2-2C, CLEARING TREES AND MULCHING IN SUCH A MANNER REDUCES THE RUNOFF DESIGNER: AGF
replaced promptly. CURVE NUMBER OF THE LAND FROM 55 TO 48. THIS REDUCTION, IN COMBINATION WITH THE REDUCTION IN IPRODUCTION-1 ZQD
PEAK FLOW FROM MULCH ADDITION, MEETS THE REQUIREMENTS OF 9VAC25-870-66D.
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. PyTH OF
°J,p
S. Any sediment deposits remaining in place after the silt fence is no longer required 1 • -o c`
shall be dressed to conform with the existing grade, prepared and seeded.
PERSPECTIVE VIEW �� 9
NOTE: TEMPORARY DRAINAGE DITCH OUTFALLS FOR USE PRIOR TO STABILIZATION Jimmy L. Taggart
Lic. No.
22841 or?o,0 03/06/23
E5510NAL V
STONE 70' MIN.
CONSTRUCTION
ACCESS /�3" SM-2A ASPHALT TOP
/ COURSE EXISTING
29 // y?% PAVEMENT 3-2-23 Clearing Plan Type 1124-hr 1-yrRainfall=2.97" 3-2-23 Clearing Plan Type 1124-hr 1-yrRainfall=2.97" O U)
"•^' ?-'"-�-•. `>' =�' Prepared by HP Inc. Printed 31=023 Prepared by HP Inc. Printed 3/2/2023 _J
HydroCADS 10.10-6a s/n 08126 02020 HvdmCAD Software Solutions LLC Pace 8 HvdroCADS 10.10-6a 11108126 0 2020 HvdroCAD Software Solutions LLC Pape 7 Q
6" M:N. 2 to AGGREGATE BASE Summary for Subcatchment 31S: Pre -Developed Block 10 Clearing Area Summary for Subcatchment 30S: Post -Developed Block 10 Clearing Area \ /
PROFILE Runoff = 1.77 cfs @ 12.15 hrs, Volume= 0.334 af, Depth> 0.21" Runoff = 0.15 cfs @ 13.47 hrs, Volume= 0.111 af, Depth> 0.07" Q
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 him Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hits, Idle 0.01 him Z
Type II 24atr 1-yr Rainfall=2.97" Type II 24-hr 1-yr Rainfall=2.97" <Jll J
STONE 70' MIN. Area lac) CN Description Area (ac) CN Description O
19.180 56 Woods, Good, HSG B. gravel road 19.180 49 Blush, Good, HSG B, Graveled Road rY
CONSTRUMION ASPHALT PAVED 19.180 100.00%Pervious Area " 19.180 100.00%Pervious Area
LINE
E ACCESS A 1
To Length Slope Velocity Capacity Description Tc Length Slope Velocity Capacity Description J J z
(min) (feet) (ftlft) (ff/sec) WS) (min) (feet) attit) (ft/secl (CIS) z O
,,fII I�' EXISTING 15.0 Direct Entry, 8.0 Direct Entry, O
SNOW FENCE �IuyNll IIIIIIIII" - ly �% 4 2% PAVEMENT U
(. 111 IIII r �V 2% 12' MIN. Subcatchment 31S: Pre -Developed Block 10 Clearing Area Subcatchment 30S: Post -Developed Block 10 Clearing Area J
a Hydrograph Hydrograph
II 1.77ds ■R°°°a 0.10,..____. 0.15ds j _ ____ __ __ __ __ _ ■�^°^ W z
hr
"MUST EXTEND FULL WIDTH DRAINAGE ype II24all o+ _ -- -
7 311 4', hr U J
OF INGRESS AND EGRESS TO SEDIMENT 1-yr Rainf =2.97" - 1-1fxRainfallr2.97".
BOARD FENCE i-POSITIVE
G DEVICE UDOff VO me_0.3''�4 ofCORD FENCE OPERATION Runoff Arpa=19.180 ac 01 RuhWArlan=19.180 a1c L w
R lu - 0., _fti''lif chime=0.111 of
PLASTIC FENCE �N runoff Depth>0.11" G °' [runoff be pth>0.07" cr LJJ
CORRECT METHODS OF TREE FENCING -- -- -- --i-- -- -- -- -- -
Tc=15.0 min, o.or TC=8A=1r11fi --'- CN=56 ° I W 06
MIN. PO51'iIVE DRAINAGE
--,--:
RAPPINGDEVICE
M-I _ _
l '
,
. •. ....T .. - 0.03
X� Oki
0.02
0 0
FILTER CLOTHiw� o i z 3 a s s v a s to n ,z 13 u s 14 17 to is zo n zz z3 z4 o r z a < s s r a s to n iz is a rs is n s is zo zt zz 23 24
SECTION A -A m. ,a.a,, e,auar.,
W Ir
LLJ
asse
assess A minimum water tap of 1 inch must be fim1alled with a minhutun 1 inch ballcock
r* CORRECT TRUNKARMORING Shutoff Valve Supplying a wash hose with a diametef of 1.5 111C11es for adequate
TRIANGULAR BOARD FENCE COnStant presstu�e. Wash water must be caned away from the entrance to art
approved Settling area to remove seclhuent. All Sediment shall be prevented from DATE: 21 23
entering storm drains. ditches or watercourse`. SCALE:
WPO: 8438
TP TREE PROTECTION FENCING DETAIL PAVED WASH RACK FILE: 8438
NOT TO SCALE 3.38-2
SHEET: 5 OF 6
1992
3.35
STD & SPEC 3.35
MULCHING Mu
Definition
Application of plant residues or other suitable materials to the soil surface.
$
1. To prevent erosion by protecting thesl oil surface from raindrop impact and reducing
the velocity of overland flow.
2. To foster the growth of vegetation by increasing available moisture and providing
insulation against extreme heat and cold.
Conditions Where Practice Aoolies
1. Areas which have been permanently seeded (see Std. & Spec. 332, PERMANENT
SEEDING) should be mulched immediately following seeding.
1992 335
2. Areas which cannot be seeded because of the season should be mulched to provide
some protection to the soil surface. An organic mulch should be used, and the area
then seeded as soon weather or seasonal conditions permit. It is not recommended
that fiber mulch be used alone for this practice; at normal application rates it just
simply does not provide the protection that is achieved using other types of mulch.
3. Mulch may be used together with plantings of trees, shrubs, or certain ground covers
which do not provide adequate soil stabilization by themselves.
4. Mulch shall be used in conjunction with temporary seeding operations as specified
in TEMPORARY SEEDING, Std. & Spec. 3.31.
Planning Consideration
Mulches are applied to the soil surface to conserve a desirable soil property or to promote
plant growth. A surface mulch is one of the most effective man - of controlling runoff and
erosion on disturbed land.
Mulches can increase the infiltration rate of the soil, reduce soil moisture loss by
evaporation, prevent crusting and sealing of the soil surface, modify soil temperatures, and
provide a suitable microclimate for seed germination.
Organic mulch materials, such as straw, wood chips, bark, and fiber mulch have been found
to be the most effective.
Chemical soil stabilizers or soil binders should not be used alone for mulch. These
materials are useful to bind organic mulches together to prevent displacement.
Avariety of manufactured SOIL STABIIJZATION BLANKRTS AND MATTING (see Std.
& Spec. 3.36) have been developed for erosion control in recent years. Some of these
products can be used as mulches, particularly in critical areas such as waterways. They also
may be used to hold other mulches to the soil surface.
The choice of materials for mulching will be based on the type of soil to be protected, site
conditions, season and economics. It is especially important to mulch liberally in mid-
summer and prior to winter, and on cut slopes and southern slope exposures.
Organic Mulches
Straw - The mulch most commonly used in conjunction with seeding. The straw should
come from wheat or oats (free of troublesome weed seeds) and may be spread by hand or
machine. Straw can be windblown and must be anchored down by an acceptable method.
III - 350
1992 3.35
Hwy - May be used in lieu of straw where volunteer, will not present a problem, and may
be spread by hand or machine. Hay can be windblown and must also be anchored or tacked
down.
Com Stalks - These should be shredded into 4- to 6-inch lengths. Stalks decompose slowly
and are resistant to displacement.
Wood Cbins - Suitable for areas that will not be closely mowed, and around ornamental
plantings. Chips decompose slowly and do not require tacking. They must be treated with
12 pounds of nitrogen per ton to prevent nutrient deficiency in plants; however, can be a
very inexpensive mulch if chips are obtained from trees cleared on the site.
Bark Chips. Shredded Bark - These are by-products of timber processing which are used in
landscaped plantings. Bark is also a suitable mulch for areas planted to grasses and not
closely mowed. It may be applied by hand or mechanically and is not usually toxic to
grasses or legumes; additional nitrogen fertilizer is not required.
Fiber Mulch - Used in hydroseeding operations and applied as part of the slurry. It creates
the best seed -soil contact when applied over top of (as a separate operation) newly seeded
areas. These fibers do not require tacking, although tacking agents or binders are
sometimes used in conjunction with the application of fiber mulch. This form of mulch does
= provide sufficient protection to highly erodible soils. Additium . fiber mulch will not
be considered adequate mulch when used during the summer months or when used for
late fall mulch cover. Use straw mulch duringthese hese periods. Fiber mulch may be used to
tack (anchor) straw mulch. This treatment is well suited for steep slopes, critical areas, and
areas susceptible to displacement.
There are other organic materials which matte excellent mulches but are only available
locally or seasonally. Creative use of these materials can reduce costs.
Chemical Mulches and Soil Binders
A wide range of synthetic, spray -on materials are marketed to stabilize and protect the soil
surface. These are emulsions or dispersions of vinyl compounds, rubber or other substances
which are mixed with water and applied to the soil. They may be used alone in some cases
as temporary stabilizers, or in conjunction with fiber mulches or straw.
When used alone, chemical mulches do not have the capability to insulate the soil or retain
soil moisture that organic mulches have. This soil protection is also easily damaged by
traffic. Application of these mulches is usually more expensive than organic mulching, and
the mulches decompose in 60-90 days.
Blankets and Matting
Field experience has shown that plastic netting, when used alone, does not retain soil
moisture or modify soil temperature. In some cases it may stabilize the soil surface while
III - 351
1992 335
grasses are being established, but is primarily used in grassed waterways and on slopes IQ
Jute mesh and other soil stabilization blankets are good choices for mulching on difficult
slopes and in minor drainage swales. Most of the soil stabilization mattings (used to create
a permanent matrix for root growth within the soil) must receive mulching in order to
properly stabilize an area Notably, some manufacturers have recently developed permanent
mattings which include self-contained, temporary mulching materials; however, these
measures will have to meet the requirements noted in Std. & Spec. 3.36, SOIL
STABILIZATION BLANKETS AND MATTING, before they can be recommended for use
on steep slopes and in channel flow situations.
The most critical aspect of installing blankets and mats is obtaining firm, continuous contact
between the material and the soil Without such contact, the material may fail and thereby
allow erosion to occur. It is important to use an adequate number of staples and make sure
the material is installed properly in order to maximize soil protection. These products are
discussed in more detail in Std. & Spec. 3.36, SOIL STABILIZATION BLANKETS &
MATTING.
Organic Mulches
Organic mulches may be used in any area where mulch is required, subject to the
restrictions noted in Table 335-A.
Materiah Select mulch material based on site requirements, availability of materials, and
availability of labor and equipment Table 335-A lists the most commonly used organic
mulches. Other materials, such as peanut hulls and cotton burs, may be used with the
permission of the local Plan -Approving Authority.
Prior to mulching: Complete the required grading and install needed sediment control
practices.
Lime and fertilizer should be incorporated and surface roughening accomplished as needed.
Seed should be applied prior to mulching except in the following cases:
a Where seed is to be applied as part of a hydroseeder slurry containing fiber
mulch
b. Where seed is to be applied following a straw mulch spread during winter
months.
III - 352
1992 335
Source: Va. DSWC
III - 353
TABLB 335-A
ORGANIC MULCH MATERIALS AND APPLICATION RATES
RATES:
MULCHES:
NOTES:
per Acre
Per 1000 sq. ft.
Straw or Hay
1$ - 2 tons
70 - 90 lbs.
Free from weeds and coarse
(Minimum 2
matter. Must be anchored.
tons for
Spread with mulch blower
winter cover)
or by hand.
Fiber Mulch
Minimum
351bs.
Do not use as mulch for
15001bs.
winter cover or during hot,
dry periods-* Apply as
slurry.
Corn Stalks
4 - 6 tons
185 - 275 lbs.
Cut or shredded in 4fi"
lengths. Air-dried. Do not
use in fine turf areas. Apply
with mulch blower or by
hand
Wood Chips
4 - 6 tons
185 - 275 tbs.
Free of coarse matter. Air-
dried Treat with 12111s
nitrogen per ton. IM not
use in fine turf areas. Apply
with mulch blower, clop
handler, or by hand.
Bark Chips
50 - 70 cu.
1-2 cu. yds.
Free of coarse mattes Air -
or
yds.
dried. Do not use in fine
Shredded
turf areas. Apply with
Bark
match blower, chip handler,
or by hand.
* When fiber mulch is the only available mulch during periods when straw
should be used, apply at a minimum rate of 2000 lbs./ac. or 45 lbs./1000 sq. ft.
1992 3.35
Application: Mulch materials shall be spread uniformly, by hand or machine.
When spreading straw mulch by hand, divide the area to be mulched into approximately
1,000 sq. ft. sections and place 70-90lbs. (1h to 2 bales) of straw in each section to facilitate
uniform distribution.
Mulch Anchoring: Straw mulch must anchored immediately after qpr a i to prevent
displacement. Other organic mulches listed in Table 335-A do not require anchoring. The
following methods of anchoring straw may be used:
1, h anchoring o f r r r This is a
tractor -drawn implement designed to punch mulch into the soil surface. This method
provides good erosion control with straw. It is limited to use on slopes no steeper
than 3:1, where equipment can operate safely. Machinery shall be operated on the
Contour.
2. Fiber Mulch: A very common practice with widespread use today. Apply fiber
mulch by means of a bydroseeder at a rate of 500-750 lbs./acre over top of straw
mulch or hay. It has an added benefit of providing additional mulch to the newly
seeded area
3. Liquid mulch binders: Application of liquid mulch binders and tackifiers should be
heaviest at edges of areas and at crests of ridges and banks, to prevent displacement.
The remainder of the area should have binder applied uniformly. Binders may be
applied after mulch is spread or may be sprayed into the mulch as it is being blown
onto the soil.
The following types of binders may be used:
a Synthetic binders - Formulated binders or organically formulated
products may be used as recommended by the manufacturer to anchor
mulch.
' b. Asphalt - Any type of asphalt thin enough to be blown from spray
equipment is satisfactory. Recommended for use are rapid curing
(RC-70, RC-250, RC-800), medium curing (MC-250, MC-800) and
emulsified asphalt (SS-1, CSS-1, CMS-2, MS-2, RS-1, RS-2, CRS-1, and
CRS-2).
Apply asphalt at 0.10 gallon per square yard (10 gal./1000 sq. ft. or 430
gal./acre). Do not use heavier applications as it may cause the straw
to "perch" over rills. All asphalt designations are from the Asphalt
Institute Specifications.
' Note: This particular method is not used as commonly today as it once was in the
past. The development of hydraulic seeding equipment promoted the industry
III - 354
MINIMUM TOP WIDTH (W)
REQUIRED FOR SEDIMENT
TRAP EMBANKMENTS
ACCORDING TO HEIGHT OF
EMBANKMENT (FEET)
SOURCE: VA. DSWC
H H0
W
1.5 0.5
2.0
2.0 1.0
2.0
2.5 1.5
2.5
3.0 2.0
2.5
3.5 2.5
3.0
4.0 3.0
3.0
4.5 3.5
4.0
5.0 4.0
4.5
ORIGINAL
GROUND
ELEV.
PLATE. 3.13-1
SOURCE: VA. DSWC PLATE. 3.14-2
,• vnaIABIF
ORIGINP VPAIABIE
GROUND
ELEV. V
fN CU, YDJACRE
I
VPAIMLI
0 CU, YDJACRE
(EXCAVATED) a•Nax
\FILTERCHOPH
GROUND
GRDurvD
EIEV
'SEEPIATE3.111 "COPASEAGCREGATE
CIASSI RIPW
CROSS SECTION OF OUTLET
CIASS I RIPW
6MDRA pN EEM
ACE PAFA
QNAC)
pN 7
DIVERS ON
DIKE
I/..
COMSE AG(REGSIE\
EXCAVATED �gUTEACLO
f..COARSEAGGREGATESWVJ_BEVDOTi3,Y35]CAY5
OUTLET (PERSPECTIVE VIEW)
STEMPORARY SEDIMENT TRAP
JI
NOTTOSCALE
3.13-2
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Jimmy L. Taggart
Uc. No.
22841
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DRAFTER:
AGF
DESIGNER:
AGF
PRODUCTION:
ZOD
DATE:
21 23
SCALE:
WPO:
8438
FILE:
8438
SHEET: