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Home My WebLink AboutWPO201900039 Plan - E&S 2020-06-17ALBEMARLE COUNTY GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE O SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. FILL SLOPE JURCE: VA. DSWC TEMPO PAT� DIVERSION EARTHEN RIDGE 11 11 , l 11 l WIN 11 l�� _ �� , l (� _ l� l D (1 w . CONCRETE BLOCK WIDTH = PIPE DIA. X 2 TYPICAL CONCRETE BASE SOURCE: VA. DSWC OPERTY LINE STEEL PLATE THICKNESS = 0.25" MIN STEEL PLATE WIDTH = PIPE DIA. X 2 TYPICAL STEEL BASE PLATE. 3,1 4-3 SED. BASIN DRAINAGE AREA / - \ TOP OF SLOPE DD �T I I \ \\ S/ / / / � \ \ PREV. STABILIZED EMBANKMENT ..ISB 22.00' X \ I I I II I I \ I I // 4� ' 92.00 I _-'-SEDIMENT BASIN "ADD." /6.00' IINII I , o \ / I 36" CMP RISER W/ 1095 ANTI -FLOTATION BASE AND ANTI -VORTEX TRASH RACK D i------- 18" FLARED END SECTION AND OUTLET PROTECTION INV. OUT = 1069.80 D50 = 6" L = 7' W=4.33' ooM l I I / 1o7, a , BOTTOM OF SLOPE ° / \ ��\ \ \ \ 89.35' \ / / / / PROJECT LIMITS 7700� Yl / x =x / SE / DISCLAIMER: �Il I1ll/ll//ll�III�THrl �� _�7/IAO ��i�l/11�111ll/l �� lr[I� DESIGN HIGH WATER (25-YR. STORM ELEV.) ELEV. 1077.79 MIN. 0.5 ELEV. 1076.70 67 C.Y./ AC. "DRY " STORAGE (337 CY TOTAL) ELEV. 1074.45 N .j 67 C.Y./ AC. WET " STORAGE (337 CY TOTAL)) SEDIMENT CLEANOUT POINT ELEV. = 1073.00 ONS ELEV. 1078.00 M4N.2. MIN. 3.0' MIN. 1.0' N 36"-DIA. RISER DEWATERING DEVICE 3" ORIFICE, INV. 1074.45 BOTTOM ELEV @ BASE = 1070.50/ '--60.0 LE 18"-DIA. HDPE N12 PIPE INV. IN = 1070.40 ANTI -FLOTATION BASE INV. OUT 1069.80 DCESD N CELEVAT�ONS WTHOUT EMERGENCY SPA LL Y (RISER PASSES 25-YR. EVENT) SOURCE: VA. DSWC PLATE. 3.1 4-2 SEDIMENT BASIN "ADD." DESIGN CRITERIA: DRAINAGE AREA = 5.03 AC. CURVE NUMBER = 84 TIME OF CONCENTRATION (TR55) = 23.3 MIN Q2 (RELEASE) = 3.09 CFS THIS ADDENDUM IS BEING PROVIDED TO SPECIFY REASONABLY APPROPRIATE EROSION CONTROL MEASURES FOR THE DURATION OF THE PROJECT, UNTIL DISTURBED AREAS CAN BE STABILIZED. TOPOGRAPHY AND BUILDING LOCATIONS SHOWN ARE PER SURVEY INFO FROM TOM SHUMATE, JR, LS, DATED MAY 25, 2020. REVISED PARKING LIMITS SHOWN ARE PER DEVELOPER DOCUMENTS PROVIDED TO THE ENGINEER ON MAY 26, 2020. SCALE: 1" = 50'-0" THIS ADDENDUM DOES NOT ALLEVIATE ANY RESPONSIBILITIES ASSOCIATED WITH THE IMPLEMENTATION OF APPROVED PLANS DATED APRIL 9, 2020. AREAS LOCATED OUTSIDE OF THE SPECIFIED SEDIMENT TRAP'S DRAINAGE AREA MUST INCORPORATE EROSION AND SEDIMENT CONTROL MEASURES AS SPECIFIED IN THE APPROVED PLANS UNTIL DEEMED FULLY STABILIZED BY THE APPROPRIATE COUNTY OFFICIALS. MAINTENANCE AND TEMPORARY/PERMANENT 50 25 0 50 100 STABILIZATION REQUIREMENTS OF THE APPROVED PLANS REMAIN VALID FOR ALL AREAS. THIS ADDENDUM SHALL BE INCORPORATED AS A CHANGE IN THE SWPPP IMMEDIATELY UPON APPROVAL BY COUNTY OFFICIALS. PROPOSED EROSION AND SEDIMENT CONTROL LEGEND SAE SAFETY FENCE (3.01) CE CONSTRUCTION ENTRANCE (3.02) CRS CONSTRUCTION ROAD STABILIZATION (3.03) SE IP O TS SILT FENCE (3.05) STORM DRAIN INLET PROTECTION (3.07) CULVERT INLET PROTECTION (3.08) TEMPORARY DIVERSION DIKE (3.09) TEMPORARY FILL DIVERSION (3.10) SEDIMENT TRAP (3.13) TOP SOILING (3.30) TEMPORARY SEEDING (3.31) PERMANENT SEEDING (3.32) MULCHING (3.35) DUST CONTROL (3.39) SEDIMENT BASIN (3.14) ROCK CHECK DAM (3.20) LIMITS OF DISTURBANCE SEDIMENT BASIN DRAINAGE AREA I U SETH R DERICK Lic. No. 041454 W June 15, 202-0 �W �� 1�,sl O1VA L CL W W (Z�) C/)Lo Z�o p0) z � v, � O N Q CO°�SNvO C) �z UJ (D0L,LL p I- �zCLLO J °° J C� Z No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 1 1 /06/19 4 County Review Comments 11/21/19 5 County Review Comments 4/9/2020 6 Erosion Control Addendum 6/3/2020 6 Sediment Basin Addendum 6/15/2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION ESC/PPP ADDENDUM Project number Date Drawn by Checked by 19004C June 21, 2019 ETS SOR C-3-01 -ADD, 13.24 AC DISTURBED AREA