HomeMy WebLinkAboutWPO201400043 Plan - Approved 2014-05-09PROPERTY AREA: 5.39 AC
ZONING: RA WITH ENTRANCE CORRIDOR OVERLAY (EC)
EXISTING USE:
MAINTENANCE FACILITY
GENERAL NOTES:
_!GENERAL
KESWICK CLUB, LLC
1
701 CLUB DRIVE
W
KESWICK, VA 22947
PLAN PREPARER:
ROUDABUSH, GALE & ASSOCIATES
DRAINAGE DISTRICT:
914 MONTICELLO ROAD
WATERSHED:
CHARLOTTESVILLE, VA 22902
TAX MAP PARCEL NO:
0800- 00- 00 -06OA0
PROPERTY ADDRESS:
960 CLUB DRIVE
BOUNDARY:
KESWICK, VA 22947
PROPERTY AREA: 5.39 AC
ZONING: RA WITH ENTRANCE CORRIDOR OVERLAY (EC)
EXISTING USE:
MAINTENANCE FACILITY
BUILDING SETBACKS:
Ua
FRONT (INTERNAL ROAD) 25'
1
FRONT (EXTERIOR ROAD) 75'
W
SIDE 25'
REAR 35'
DRAINAGE DISTRICT:
RIVANNA RIVER
WATERSHED:
MIDDLE RIVANNA RIVER
W
(THIS SITE IS NOT LOCATED WITHIN THE WATERSHED OF A PUBLIC WATER SUPPLY
05
RESERVOIR.)
BOUNDARY:
THE METES AND BOUNDS ARE FROM A PLAT PREPARED BY ROUDABUSH, GALE AND.
0
ASSOCIATES RECORDED AT DB 1467 PAGE 15.
TOPOGRAPHY:
THE TOPOGRAPHY IS FROM A FIELD SURVEY COMPLETED BY ROUDABUSH GALE &
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ASSOCIATES ON FEBRUARY 12, 2014. BENCHMARK IS EXISTING SANITARY MANHOLE 1
LOCATED BY ROUDABUSH, GALE AND ASSOCIATES ON FEBRUARY 12, 2014.
DATUM:
NAVD 88
CRITICAL SLOPE: NO CRITICAL SLOPES EXIST WITHIN THE PROJECT LIMITS
FLOODPLAIN: A PORTION OF THIS PROPERTY LIES WITHIN AN AREA DESIGNATED AS ZONE "A" AS SHOWN
ON THE FLOOD INSURANCE RATE MAP COMMUNITY PANEL NO: 51003CO325D, DATED
FEBRUARY 4, 2005.
THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL- FORESTAL DISTRICT.
THIS MINOR SITE PLAN AMENDMENT IS TO AMEND SDP -92 -026 KESWICK GOLF MAINTENANCE FACILITY FINAL SITE PLAN, SINGED
APRIL 30, 1992
PROPOSED ADDITION: 24' X 96' POLE BARN (2,304 SF)
PROPOSED USE: EQUIPMENT STORAGE
PROPOSED BUILDING HEIGHT: NOT TO EXCEED 35'
REQUIRED PARKING - 1 SPACE PER EMPLOYEE ASSIGNED TO WORK ON -SITE
25 EMPLOYEES (13 FULL TIME EMPLOYEES AND UP TO 12 PART -TIME EMPLOYEES)
25 PARKING SPACES TOTAL
EXISTING PARKING - 27 SPACES REGULAR SPACES
2 HANDICAP SPACES
29 PARKING SPACES TOTAL
TOTAL PROVIDED PARKING - 27 SPACES REGULAR SPACES
2 HANDICAP SPACES
29 PARKING. SPACES TOTAL
THE EXISTING PARKING SPACES LOCATED WITHIN PROPOSEDi FOOTPRINT OF POLE BARN
WILL BE RELOCATED TO EXISTING PAVED AREA ON SOUTHWEST SIDE OF EXISTING BUILDING.
TREE CANOPY COVERAGE REQUIRED - 10% OF SITE AREA
234,996 SF.x 10 % = 23,450 SF
TREE CANOPY COVERAGE PROVIDED - 143,568 SF OF EXISTING WOODED AREA TO BE SAVED
143,568 x 1.25 BONUS FOR SAVING EXISTING TREES
179,460 SF (76 %) CANOPY COVERAGE PROVIDED
LANDSCAPING ADJ. TO PARKING AREA REQUIRED - 5% OF PAVED PARKINGNEHICLE CIRCULATION
35,674 SF x 5% = 1784 SF
LANDSCAPING ADJ. TO PARKING ARE PROVIDED - 19 EX. LEYLAND CYPRESS (92 SF EACH) = 1,748 SF
4 EX. DECIDUOUS TREES (130 SF EACH) = 520 SF
2,268 SF (6.4 %) LANDSCAPED AREA PROVIDED
TOTAL DISTURBED ACREAGE - 0.02 ACRES
THERE IS NO SITE GRADING PROPOSED WITH THIS AMENDMENT.
GENERAL CONSTRUCTION NOTES
1. PRIOR TO ANY CONSTRUCTION WITHIN ANY EXISTING PUBLIC RIGHT -OF -WAY, INCLUDING CONNECTION TO ANY EXISTING
ROAD, A PERMIT SHALL BE OBTAINED FROM THE VIRGINIA DEPARTMENT OF TRANSPORTATION (VDOT). THIS PLAN AS
DRAWN MAY NOT ACCURATELY REFLECT THE REQUIREMENTS OF THE PERMIT. WHERE ANY DISCREPANCIES OCCUR THE
REQUIREMENT OF THE PERMIT SHALL GOVERN.
2. ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND STANDARDS OF
VDOT UNLESS OTHERWISE NOTED.
3. EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION
CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER CONSTRUCTION.
4. ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED, SEEDED, AND MULCHED.
5. THE MAXIMUM ALLOWABLE SLOPE IS 2:1 (HORIZONTAL: VERTICAL). WHERE REASONABLY OBTAINABLE, LESSER SLOPES OF
3:1 OR BETTER ARE TO BE ACHIEVED.
6. PAVED, RIP -RAP OR STABILIZATION MAT LINED DITCH MAY BE REQUIRED WHEN IN THE OPINION OF COUNTY ENGINEER, OR
DESIGNEE, IT IS DEEMED NECESSARY IN ORDER TO STABILIZE A DRAINAGE CHANNEL.
7. TRAFFIC CONTROL SIGNS SHALL CONFORM TO THE VIRGINIA MANUAL FOR UNIFORM TRAFFIC CONTROL DEVICES.
8. UNLESS OTHERWISE NOTED, ALL CONCRETE PIPES SHALL BE REINFORCED CONCRETE PIPE -CLASS III.
9. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION
INDUSTRY (29 CFR PART 1926).
�'I,TH OF
Chris 0 er C. Mulli n
Lic. No..
10 031672 w4 t
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ozSSrONAL
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OPEN SPACE S -VIII
APPROVALS. DATE
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REVISIONS
APRIL 4, 2014
COMMENTS
MAY 9, 2014
COMMENTS
DATE
FEBRUARY 27, 2014
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COMMENTS
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COMMENTS
DATE
FEBRUARY 27, 2014
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FILE NUMBER
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STORMWATER MANAGMENT NOTES:
I'1c'c/�I�TI/1AI.
THIS PROJECT AND SUBSEQUENT DISTURBANCE AREA OF 0.02 ACRES IS
LOCATED 960 CLUB DRIVE 1N KESWICK. THE DISTURBED AREA CONTAINS A
FEW EXISTING LANDSCAPE PLANTINGS WHICH WILL BE ATTEMPTED TO SAVED,
THESE PLANS PROPOSE A SINGLE GOLF MAINTENANCE BUILDING, AND WILL
BE PARTIALLY LOCATED OVER AN EXISTING IMPERVIOUS PARKING AREA, THE
PERVIOUS PORTION OF THE DISTURBED AREA CONTAINS A FAIR COVER OF
EXISTNG GRASS. MOST OF THE SLOPES WITHIN THE DISTURBED AREA ARE
BETWEEN 2% AND 3 %, BUT A MUCH STEEPER SLOPE IS LOCATED ALONG
THE EDGE OF THE BUILDING CONSTRUCTION, WHERE RUN -OFF PROTECTION
WILL BE A PRIMARY CONCERN. SPECIAL ATTENTION SHALL BE PLACED
UPON CONTINUAL STABILIZATION OF THE EXISTING FILL SLOPE BOTH DURING
BUILDING CONSTRUCTION AND DURING THE INSTALLATION OF THE ROOF
LEADERS TOT HE PROPOSED INFILTRATION PITS. WHEN COMPLETED, THE
PROPOSED MAINTENANCE SHED WILL PROVIDE CONNECTING DOWNSPOUT TO
THE TWO PROPOSED INFILTRATION LOCATIONS AT THE TOE OF THE EXISTING
SLOPE. THE INFILTRATION PITS WILL PROVIDE WATER QUALITY AND ALSO
MEET THE 10 YR PRE -POST DETENTION REQUIREMENT FOR THEIR POTENTIAL
IMPACTS TO THE DOWNSTREAM RIVANNA WATERSHED.
SOILS:
THE SOIL TYPE PRESENT WITHIN THE DISTURBED AREA ONSITE CONSIST OF
MANTEO CHANUM SILT LOAM (51B) AND LIGNUM SILT LOAM (46B), WHERE
THE INFILTRATION AREAS ARE PROPOED. THESE SOIL TYPES ARE
CONSIDERED MODERATELY WELL DRAINED TO WELL DRAINED, AND INCLUDE
LOW TO HIGH ABSORPTION RATES (Ksat). THE GRADED AREAS OUTFALL TO
MANMADE GRASS LINED CHANNEL, AND ULTIMATELY TO THE WETLANDS, .
FLOODPLAIN AND TRIBUTARIES WHICH CONNECT TO RIVANNA CREEK.
WATER QUALITY:
THIS SITE IS LOCATED WITHIN THE RIVANNA CREEK PORTION OF
CHESAPEAKE BAY WATERSHED. TWO ROOF- LEADERED INFILTRATION BMP'S
HAVE BEEN DESIGNED AND IMPLEMENTED TO ACCOUNT FOR THE
STORM -WATER POLLUTANT REMOVAL AND DETENTION REQUIREMENTS. THE
PRIVATELY MAINTAINED DRAINAGE SYSTEM. WILL BE LOCATED ADJACENT TO
THE EXISTING FLOODPLAIN AND LARGER STORM EVENTS WILL SHEET -FLOW
FROM THE TOP OF THE INFILTRATION PIT INTO THE FLOODPLAIN..
EROSION CONTROL MEASURES:
ALL OF THE CONSTRUCTION IMPROVEMENTS CAN EASILY CONTROL EROSION
WITH A CONSTRUCTION ENTRANCE, SILT FENCE PROTECTION, AND ANY
NECESSARY TREE PROTECTION TO PRESERVE EXISTING TREES, GRADING
OPERATIONS INVOLVE REMOVAL OF THE PAVEMENT IN PREPARATION OF THE
PAD SITE, INSTALLATION OF THE ROOF LEADERS AND INFILTRATION AREAS,
AND ANY REMOVAL OF ANY EXISTING TREES IN CONFLICT WITH THE
PROPOSED LAYOUT.
DRAINAGE:
THE LAND DISTURBANCE WITH THIS PLAN IS VERY CONSOLIDATED, AND IS
LOCATED WITHIN AN EXISTING GOLF MAINTENANCE AREA. ALL ADDITIONAL
DRAINAGE WILL CONNECTED AND FILTERED BY THE INFILTRATION PITS PRIOR
TO ENTERING THE FLOODPLAIN. THE PROPOSED DRAINAGE PATTERN SHALL
REMAIN SIMILAR TO THE . EXISTING AND OUTFALL TO ITS ORIGINAL LOCATION.
THE NET EFFECT TO THE WATERSHED OUTFALL LOCATIONS IS MINIMAL,
PARTICULARLY SiNCE THE PROPOSED IMPERVIOUSNESS WILL PRIMARILY BE
CONTROLLED BY INFILTRATION AREAS. SEE SUPPORTING HYDROLOGY AND
COMPUTATIONS.
STORMWATER RUN -OFF
THE EXISTING PARCEL CONSISTS OF 5.39 ACRES, MOST OF WHICH IS
COVERED BY MATURE GRASS AND NUMEROUS LARGE TREES. THE
PROPOSED 2 YEAR RUNOFF FROM THIS NEWLY DEVELOPED PORTION OF
THE SiTE IS 0.24 cfs AND THE PROPOSED 10 YEAR RUN -OFF FROM THIS
SITE IS ABOUT 0.31 cfs. THE IMPROVEMENTS AND RUNOFF ARE BEING
MANAGED SO THEY WILL NOT OFFER ANY SIGNIFICANT INCREASE . OR
REDUCTION TO THE EXISTING RUN -OFF SCENARIO, WHICH IS UNDER HALF
THAT OF THE PROPOSED RUNOFF.
ADJACENT AREAS
THE SITE IS CURRENTLY SURROUNDED BY A GOLF COUSE COMMUNITY,
INCLUDING RESIDENTIAL LOTS CONTAINING GRASS AND LARGE, MATURE TREE
GROWTH. ANY CONTRIBUTING DRAINAGE AREAS, THAT ARE UNDISTURBED,
MUST BE DIVERTED, AS NECESSARY, TO PREVENT THE INTRODUCTION OF
OFFSITE DRAINAGE TO THE NEWLY DISTURBED AREA. PERIMETER EROSION
CONTROL MEASURESMUST BE PROPERLY MAINTAINED TO PREVENT
UNINTENDED IMPACTS TO ANY OFFSITE AREAS, AND PREVENT ANY SEDIMENT
LADEN WATER FROM ENTERING THE OFFSITE WATERSHED.
MAINTAINANCE:
THE EROSION CONTROL MEASURES SHALL BE INSPECTED AT EACH
SIGNIFICANT RAINFALL EVENT OR 131- WEEKLY AT A MINIMUM TO ENSURE
PROPER FUNCTIONALITY OF THE EROSION CONTROL MEASURES.
�UW.
38° 0 20'N
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a Soil Map - Albemarle County, Virginia
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Conservation Service National Cooperative Soil Survey
�° tl36 "N
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4/312014
Page 1 of 3
Map Unit Description: Lignum silt loam, 2 to 7 percent slopes - -- Albemarle County, Virginia
Albemarle County, Virginia
4613- Lignum silt loam, 2 to 7 percent slopes
Map Unit Setting
Mean annual precipitation: 25 to 65 inches
Mean annual air temperature: 54 to 59 degrees F
Frost -free period: 195 to 231 days
Map Unit Composition
Lignum and similar soils: 85 percent
Minor components: 3 percent
Description of Lignum
Setting
Landform: Hillslopes
Landform position (two - dimensional): Summit
Landform position (three - dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Residuum weathered from serecite schist
Properties and qualities
Slope: 2 to 7 percent
Depth to restrictive feature. 40 to 60 inches to paralithic bedrock
Drainage class: Moderately well drained
Capacity of the most limiting layer to transmit water (Ksat): Very low
to moderately low (0.00 to 0.06 in/hr)
Depth to water table: About 12 to 30 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity. Moderate (about 8.4 inches)
Interpretive groups
Farmland classification: Farmland of statewide importance
Land capability (nonirrigated): 2e
Hydrologic Soil Group: D
Typical profile
0 to 9 inches: Silt loam
9 to 38 inches. Silty clay loam
38 to 58 inches: Channery silt loam
58 to 79 inches: Bedrock
Minor Components
Worsham
Percent of map unit. 3 percent
Landform: Drainageways
Landform position (two - dimensional): Footslope
Landform position (three - dimensional): Head slope, tread
Down -slope shape: Concave
USDA. Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
ROOF DRAIN
INFILTRATION SYSTEM
TIE -IN DOWNSPOUTS
FROM EACH END OF BLDG.
10 MINIMM DEPTH
,V DOWNSPOUT CONNECTIONS
UTILIZING PERFORATED PIPE
>01" v
FILTER
FABRIC
LINER
Map Unit Description: Manteo channery silt loam, 2 to 7 percent slopes - -- Albemarle County,
Virainia
Albemarle County, Virginia
5113- Manteo channery silt loam, 2 to 7 percent slopes
Map Unit Setting
Mean annual precipitation: 25 to 65 inches
Mean annual air temperature: 54 to 59 degrees F
Frost -free period: 195 to 231 days
Map Unit Composition
Manteo and similar soils: 80 percent
Description of Manteo
Setting
Landform: l nterfl uves
Landform position (two - dimensional): Summit
Landform position (three - dimensional): Interfluve
Down -slope shape: Convex
Across -slope shape: Convex
Parent material: Residuum weathered from serecite schist
Properties and qualities
Slope: 2 to 7 percent
Depth to restrictive feature: 15 to 20 inches to lithic bedrock
Drainage class: Somewhat excessively drained
Capacity of the most limiting layer to transmit water (Ksat): Very low
to high (0.00 to 5.95 in /hr)
Depth to water table. More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Very low (about 2.1 inches)
Interpretive groups
Farmland classification: Not prime farmland
Land capability (nonirrigated): 4e
Hydrologic Soil Group: D
Typical profile
0 to 6 inches: Channery silt loam
6 to 18 inches Very channery silt loam
18 to 79 inches: Bedrock
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources
4/3/2014 201 Conservation Service
Page 1 of 2
Web Soil Survey
National Cooperative Soil Survey
Short Version BMP Computations
Albemarle County Water Protection Ordinance: Modified Simple Method
Plan: Keswick Golf Maintenance Facility Water Resources Area: 1.
Preoarer: Date: 26- Mar -14
Project Drainage Area Designation Overall Compliance
L storm pollutant export in pounds, L = [P(Pj)R4121 [ C(A)2,721
Rv mean runoff coefficient, Rv= 0.05 + 0.009(1)
Pi small storm correction factor, 0.9
percent imperviousness
P annual precipitation, 43" in Albemarle
A project area in acres in subject drainage area, O:QS
C pollutant concentration, mg /I or ppm target phosphorus
f factor applied to RR
v required treatment volume in cy, 0.5" over imperv. area = A(I)43560(0.5/12)/27
RR required removal , L(post) - f x L(pre)
%RR removal efficiency, RR100 /L(post)
I Rv(post) v
0 95 7
New Development (For Development Areas existing rmperviouscover <= 20/)
C f _
I (pre) Rv(pre) L(pre) L(post) RR /° RR Area Type
X474
` "'A QO 1,� M 0.36 0.12 0 31 0 19 62% Development Area
0.36 0.06 015x010 62% Drinking Water Watersheds
l)�
0.36 0.07 0.18 0 11 62k Other Rural Land
�- i
V
(f�
min. values
4'x12'
* DIMENSIIONSILOCATION MAY VARY AS DICTATED BY
SITE COINDITIONS SO LONG AS A MINIMUM OF
250 CUBIC FEET OF VOLUME IS OBTAINED PER PIT.
** ASSUMES A 40% STONE VOID RATIO, WHERE
WOV REQUIRED = 192 CUBIC FEET
�.tiTH OF v j�
on r�
Christopher C. Mulligan
Lic. No.
031672 4v
ONAL
Ee��
4/3/2014
Page 1 of 1
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 EROSION OR SEDIMENT TO EXIT.
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.
THERE ARE NO SOIL STOCKPILES TO BE LOCATED ONSITE. ALL EXCESS MATERIAL TO BE HAULED TO AN
APPROVED.
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.
SILT FENCE IS LOCATED TO ACCEPT AND PROTECT THE ENTIRE DENUDED AREA FROM CONVEYING SILT.
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.
DIVERT ALL OF THE UN- DISTURBED AREAS FROM ENTERING THE CONSTRUCTION AREA..
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 (3.0) ACRES. SEE SIZING
TABLE FOR DIMENSIONS.
B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER
THAN OR EQUAL TO THREE ACRES 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 THE STRUCTURAL INTEGRITY OF THE BASIN DURING A TWENTY -FIVE
YEAR STORM OF 24 -HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL
CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT
BASIN IS UTILIZED.
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 CRITICAL AREAS ONSITE.
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.
RUN -OFF WILL BE REMAIN IN A SHEETFLOW PATTERN AND SHOULD NOT CONCENTRATE.
9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE
PROVIDED.
THERE ARE NO CRITICAL AREAS ONSITE.
10. ALL STORM SEWER INLETS THAT ARE MADE 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 CRITICAL AREAS ONSITE.
11. BEFORE NEWLY CONSTRUCTED STORM WATER 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.
INSTALL INFILTRATION PiTS PRIOR TO CONNECTION OF THE DOWNSPOUTS TO THE ROOFS.
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.
THERE ARE NO CRITICAL AREAS ONSiTE.
13. WHEN A LAVE 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.
THERE ARE NO CRITICAL AREAS ONSITE.
14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE
WATERCOURSES SHALL BE MET.
THERE ARE NO CRITICAL AREAS ONSITE.
15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE
WATERCOURSE IS COMPLETED,
THERE ARE NO CRITICAL AREAS ONSITE.
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 BACK FILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE
EROSION AND PROMOTE STABILIZATION.
E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS.
F. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH.
THIS APPLIES TO ALL UTILITY INSTALLATION OPERATIONS INCLUDING WATER, SEWER, POWER, CABLE OR GAS.
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 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.
CONTRACTOR SIHALL STABILIZE SITE, AND OBTAIN INSPECTOR APPROVAL PRIOR TO REMOVING ANY EROSION
CONTROL MEASURES.
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
STORM WATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24 -HOUR DURATION IN ACCORDANCE WITH
THE FOLLOWING STANDARDS AND CRITERIA:
ALL CONCENTRATED RUN -OFF IS TO SHEETFLOW AND IS CONTROLLED BY PERIMETER SILT FENCING. .
A. CONCENTRATED STORM WATER 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.
ALL CONCENTRATED RUN -OFF IS TO SHEETFLOW AND IS CONTROLLED BY PERIMETER SILT FENCING.
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 IN QUESTION; OR
(a) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO -YEAR STORM TO VERIFY THAT
STORM WATER WILL NOT OVERTOP THE CHANNEL BANKS NOR CAUSE EROSION OF CHANNEL BED
OR BANKS;
THE CHANGES IN RUN -OFF ASSOCIATED WITH THE DEVELOPMENT ARE QUANTIFIED IN THE HYDROLOGIC ANALYSIS
AND SUMMARIZED IN THE NARRATIVE. WITH IMPLEMENTATION OF ROOF LEADERS AND INFILTRATION AREAS
CHANGES ARE MINIMAL TO THE OVERALL SITE HYDROLOGY.
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REVISIONS
APRIL 4, 2014
COMMENTS
DATE
APRIL 4, 2014
SCALE
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