HomeMy WebLinkAboutWPO202000016 Plan - VSMP 2020-07-08STONEFIELD BLOCK DIIIIIIIIIIIIIIIIIi I
VSMP PLAN
ALBEMARLE COUNTY, VIRGINIA
SHEET NO.
DRAWING NO.
TITLE
1
OF
9
C-1
COVER SHEET
2
OF
9
C-2
EARTHWORK REQUIREMENTS
3
OF
9
C-3
EROSION & SEDIMENT CONTROL
PLAN — PHASE 1
4
OF
9
C-4
EROSION & SEDIMENT CONTROL
PLAN — PHASE 1A
5
OF
9
C-5
EROSION & SEDIMENT CONTROL
PLAN — PHASE 2
6
OF
9
C-6
EROSION & SEDIMENT CONTROL
NARRATIVE
7
OF
9
C-7
DETAILS
8
OF
9
C-8
BMP ANALYSIS & CALCULATIONS
9
OF
9
C-9
STORMWATER PROFILES & CALCULATIONS
SOURCE OF TITLE:
THIS IS A PORTION OF THE SAME PROPERTY IDENTIFIED AS TAX MAP PARCEL 61W-3-19A (PARCEL 1)
CONVEYED UNTO OCT STONEFIELD PROPERTY OWNER LLC (PREVIOUS OWNED BY ALBEMARLE PLACE EAAP,
LLC) BY THAT CERTAIN DEED DULY RECORDED IN THE CLERK'S OFFICE OF THE CIRCUIT COURT OF THE
COUNTY OF ALBEMARLE, VIRGINIA IN DEED BOOK 4857, PAGES 503-511.
NOTES:
1. REFER TO "STONEFIELD BLOCK G FINAL SITE PLAN AND VSMP PLAN" SDP 2014-00065 AND WPO
2014-00102 FOR ADDITIONAL INFORMATION INCLUDING BUT NOT LIMITED TO GENERAL NOTES AND
DETAILS, STORM DRAINAGE AREA MAPS AND CALCULATIONS, AND LANDSCAPING DETAILS AND
CALCULATIONS.
2. STORMWATER MANAGEMENT FOR THE LAND MASS ENCOMPASSED WITH THIS PLAN ARE PROVIDED WITH
THE WPO 2014-00102, WPO 2010-00023, WPO 2013-69 AND SDP 2014-00065. THIS PLAN IS IN
CONFORMANCE WITH THOSE REQUIREMENTS FOR QUANTITY AND QUALITY CONTROLS AS WELL AS MS-19.
3. THE NORTH UNDERGROUND DETENTION SYSTEM REFERENCED HEREIN IS PROVIDED WITH A STORMWATER
MAINTENANCE EASEMENT AS DESCRIBED IN DEED BOOK 4489, PAGE 6 AND SHOWN IN PLAT BOOK 4489,
PAGE 19.
4. THE DISTRICT AVENUE BIOFILTER REFERENCED HEREIN IS PROVIDED WITH A STORMWATER MAINTENANCE
EASEMENT AS DESCRIBED IN DEED BOOK 4135, PAGE 215 AND SHOWN IN PLAT BOOK 4135, PAGE 217.
5. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY ENGINEERING DEPARTMENT PRIOR TO DISTURBING
ANY OFF —SITE AREAS GREATER THAN 10,000 SQ.FT.
AMENDMENT TO WP02011-00055
VSMP/WP02020-00016
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SCALE: 1 "=2000'
SITE DATA
OWNER/DEVELOPER:
ENGINEER:
OCT STONEFIELD PROPERTY OWNER LLC
C/O O'CONNOR CAPITAL PARTNERS LLC
535 MADISON AVENUE, 6TH FLOOR
NEW YORK, NY 10022
ATTN: OJAS DESAI
EMAIL: ODESAI®OCONNORCP.COM
WW ASSOCIATES, INC
968 OLYMPIA DRIVE, SUITE 1
CHARLOTTESVILLE, VA 22911
(434) 984-2700
ATTN: HERBERT F. WHITE III, P.E.
EMAIL: HWHITEOWWASSOCIATES.NEf
SOURCE OF TITLE:
THE PROPERTY AS SHOWN ON THIS PLAN IS THE PROPERTY CONVEYED UNTO OCT
STONEFIELD PROPERTY OWNER, LLC BY THAT CERTAIN DEED DULY ON RECORD IN THE
CLERK'S OFFICE OF THE CIRCUIT COURT OF THE COUNTY OF ALBEMARLE, VIRGINIA IN DB
4857, PGS 503-511 AND IS INDICATED AS TAX MAP PARCEL TMP 61W-3-19A.
SOURCE OF BOUNDARY SURVEY:
SOURCE OF TOPOGRAPHY:
COUNTY, STATE:
MAGISTERIAL DISTRICT:
WATER PROTECTION AREA:
TAX MAP/PARCEL:
ZONING:
OVERLAY DISTRICT:
AREA
EXISTING USE:
PROPOSED USE:
TRASH:
YARD REQUIREMENTS:
PROPOSED BUILDING HEIGHT:
BUILDING GROSS AREA:
_10100111111 0 Evil 2 1 bill Allm1119
WW ASSOCIATES, INC
DATED: MAY 29, 2013
WW ASSOCIATES, INC
BY FIELD SURVEY
PERFORMED ON: SEPTEMBER 20, 2019
ALBEMARLE COUNTY, VA
JACK JOUETT
N/A (NON —WATER SUPPLY WATERSHED)
TM 61W, PARCEL 3-19A
NMD (NEIGHBORHOOD MODEL DISTRICT)
ENTRANCE CORRIDOR & AIRPORT IMPACT
PARKING LOT
RESIDENTIAL (APARTMENTS)
ON —SITE DUMPSTER
THERE ARE NO MINIMUM OR MAXIMUM LOT
WIDTHS OR DEPTH REQUIREMENTS.
88' MAX. (VARIES; 6-7 STORIES)
65,080 SF
TOTAL SITE (NEW PARCEL)
2.47
AC.
(100%)
BUILDING
1.49
AC.
(60%)
OPEN SPACE
0.46
AC.
(19%)
OTHER IMPERVIOUS
0.52
AC.
(21 %)
APPROVED
by the Albemarle County
Community Development Department
Date 10/23/2020
File WP0202000016
1 ADDRESSED COUNTY COMMENTS JDB 05/21/20 �*4V"*# DESIGNED BY: PROJECT: SET REV. NO.
zx of tir,, __ STONEFIELD BLOCK D-1
2 ADDRESSED COUNTY COMMENTS JDB 07/08/20 1't '1. JDB VSMP PLAN 2
O ENGINEERS
2 f '•P SURVEYORS DRAWN M ALBEMARLE COUNTY, VIRGINIA DRAWING NUMBER:
UJ • PLANNERS TITLE:
DIHR BY: C— 1
L;c. 267 • COVER SHEET
�z ASSOCIATES HFW
Z'00 0 sv�� SHEET NUMBER:
-�_2 POBox42 119 968O1asvillDA2291, WWA NUMBER: FILE NAME: DISCIPLINE: SCALE: DATE:
i Phone 43 V166080 Phone 434 842z0i
Phone 4343166080 Phone_ 4349842]00 1 of 9
SSIONAL E� wwwo a..eeiateee, 219040.03 904O03C_VSMP_CS-1.dw 1VIL H:AS SHOWN 02128120
NO. SHEET REVISION BY DATE NO. SHEET REVISION BY DATE N11N V: NIA
EARTHWORK REQUIREMENTS
1.GENERAL
1.1 DEFINITIONS
1.1.1 HARD MATERIALS: WEATHERED ROCK, DENSE CONSOLIDATED DEPOSITS, OR CONGLOMERATE MATERIALS WHICH ARE NOT INCLUDED IN THE DEFINITION OF ROCK- BUT WHICH USUALLY
REQUIRE THE USE OF HEAVY EXCAVATION EQUIPMENT, RIPPER TEETH, OR JACK HAMMERS FOR REMOVAL.
1.1.2 ROCK: SOLID HOMOGENEOUS INTERLOCKING CRYSTALLINE MATERIAL WITH FIRMLY CEMENTED, LAMINATED, OR FOLIATED MASSES OR CONGLOMERATE DEPOSITS, NEITHER OF WHICH CAN BE
REMOVED WITHOUT SYSTEMATIC DRILLING AND BLASTING, DRILLING AND THE USE OF EXPANSION JACKS OR FEATHER WEDGES, OR THE USE OF BACKHOE-MOUNTED PNEUMATIC HOLE
PUNCHERS OR ROCK BREAKERS; ALSO LARGE BOULDERS, BURIED MASONRY, OR CONCRETE OTHER THAN PAVEMENT EXCEEDING % CUBIC YARD IN VOLUME. REMOVAL OF HARD
MATERIAL WILL NOT BE CONSIDERED ROCK EXCAVATION BECAUSE OF INTERMITTENT DRILLING AND BLASTING THAT IS PERFORMED MERELY TO INCREASE PRODUCTION.
1.1.3 COHESIVE MATERIALS: MATERIALS ASTM D 2487 CLASSIFIED AS GC, SC, ME, CL, MH, AND CH. MATERIALS CLASSIFIED AS GM AND SM WILL BE IDENTIFIED AS COHESIVE ONLY WHEN
THE FINES HAVE A PLASTICITY INDEX GREATER THAN ZERO.
1.1.4 COHESIONLESS MATERIALS: MATERIALS ASTM D 2487 CLASSIFIED AS GW, GP, SW, AND SP. MATERIALS CLASSIFIED AS GM AND SM WILL BE IDENTIFIED AS COHESIONLESS ONLY WHEN
THE FINES HAVE PLASTICITY INDEX OF ZERO.
1.2 CRITERIA FOR BIDDING
1.2.1 BASE BIDS ON THE ELEVATIONS AS INDICATED.
1.2.2 ROCK EXCAVATION SHALL BE UNCLASSIFIED. ALL EARTHWORK EXCAVATION SHALL BE PERFORMED TO THE INDICATED ELEVATIONS.
1.2.3 BLASTING WILL BE PERMITTED ON THIS PROJECT AS SPECIFIED HEREIN.
1.2.4 REMOVE MATERIAL IN AN APPROVED MANNER, AND PROVIDE EXCAVATION SUPPORT STRUCTURES AS REQUIRED IN ACCORDANCE WITH THE U.S. ARMY CORPS OF ENGINEERS `SAFETY
AND HEALTH REQUIREMENTS MANUAL, EM-385-1-1, SECTION 25.
1.2.5 ROCK EXCAVATION, AS DEFINED HEREIN, MAY EXIST ON THIS PROJECT. ROCK EXCAVATION SHALL BE PERFORMED AS UNCLASSIFIED EXCAVATION TO THE INDICATED ELEVATIONS.
1.3 PROTECT EXISTING TREES AND OTHER VEGETATION INDICATED TO REMAIN IN PLACE AGAINST CUTTING, BREAKING, OR SKINNING OF ROOTS; SKINNING AND BRUISING OF BARK; SMOTHERING
OF TREES BY STOCKPILING CONSTRUCTION MATERIALS OR EXCAVATED MATERIALS WITHIN DRIP LINE; EXCESS FOOT OR VEHICULAR TRAFFIC; OR PARKING OF VEHICLES WITHIN DRIP LINE.
PROVIDE TEMPORARY FENCES, BARRICADES, OR GUARDS AS REQUIRED TO PROTECT TREES AND VEGETATION TO BE LEFT STANDING.
1.4 BURNING: NOT ALLOWED ON THIS PROJECT.
2. PRODUCTS
2.1 SOIL MATERIALS: FREE OF DEBRIS, ROOTS, WOOD, SCRAP MATERIAL, VEGETATION, REFUSE, SOFT UNSOUND PARTICLES, AND FROZEN DELETERIOUS OR OBJECTIONABLE MATERIALS. THE
MAXIMUM PARTICLE DIAMETER SHALL BE ONE-HALF THE LIFT THICKNESS AT THE SPECIFIED LOCATION. THE MAXIMUM PARTICLE DIAMETER FOR PIPE BACKFILL MATERIAL LOCATED LESS THAN
1-FOOT ABOVE THE PIPE CROWN SHALL BE 1-INCH.
2.1.1 COMMON
FILL:
APPROVED, UNCLASSIFIED SOIL MATERIAL WITH
THE CHARACTERISTICS REQUIRED TO COMPACT TO THE SOIL DENSITY SPECIFIED FOR THE INTENDED LOCATION.
2.1.2 BACKFILL
AND
FILL MATERIAL: ASTM D 2487, CLASSIFICATION
GW, GP, GM, GC, SW, SP, SM, SC, ME, MH, CL WITH A MAXIMUM ASTM D 4318 LIQUID LIMIT OF 50, MAXIMUM ASTM D 4318
PLASTICITY
INDEX
OF 25. MOISTURE CONTENT SHALL BE WITHIN
t3% AND IN ACCORDANCE WITH GEOTECHNICAL ENGINEER RECOMMENDATIONS.
3.8.2 SITE DRAINAGE: PROVIDE FOR THE COLLECTION AND DISPOSAL OF SURFACE AND SUBSURFACE WATER ENCOUNTERED DURING CONSTRUCTION.
3.8.2.1 SURFACE DRAINAGE: COMPLETELY DRAIN THE CONSTRUCTION SITE DURING PERIODS OF CONSTRUCTION TO KEEP SOIL MATERIALS SUFFICIENTLY DRY. PROVIDE TEMPORARY DITCHES,
SWALES, AND OTHER DRAINAGE FEATURES AND EQUIPMENT AS REQUIRED TO MAINTAIN DRY SOILS. WHEN UNSUITABLE WORKING PLATFORMS FOR EQUIPMENT OPERATION AND
UNSUITABLE SOIL SUPPORT FOR SUBSEQUENT CONSTRUCTION FEATURES DEVELOP, REMOVE UNSUITABLE MATERIAL AND PROVIDE NEW SOIL MATERIAL AS SPECIFIED IN THIS SECTION
AT NO ADDITIONAL COST TO THE OWNER.
3.8.2.2 SUBSURFACE DRAINAGE: CONSIDER SITE SURFACE AND SUBSURFACE CONDITIONS, AVAILABLE SOIL, AND HYDROLOGICAL DATA. REMOVE WATER BY BENCHING, SUMP PUMPING, DEEP
WELL PUMPING, OR OTHER METHODS TO PREVENT SOFTENING OF SURFACES EXPOSED BY EXCAVATION. USE FILTERS ON DEWATERING DEVICES TO PREVENT REMOVAL OF FINES FROM
SOIL. PROVIDE EROSION CONTROL AT THE OUTLET OF PIPING TO PREVENT EROSION. OPERATE DEWATERING SYSTEM CONTINUOUSLY UNTIL CONSTRUCTION WORK BELOW EXISTING
WATER LEVELS IS COMPLETE.
3.9 EXCAVATION
3.9.1 EXCAVATE TO THE ELEVATIONS AND DIMENSIONS INDICATED AND AS SPECIFIED IN THIS SECTION. REUSE EXCAVATED MATERIALS THAT MEET THE SPECIFIED REQUIREMENTS FOR THE
MATERIAL TYPE REQUIRED AT THE INTENDED LOCATION. WHEN SOIL NOT MEETING THE REQUIREMENTS SPECIFIED IN THIS SECTION ARE ENCOUNTERED DURING EXCAVATION, REMOVE THE
UNSUITABLE SOIL MATERIAL AND REPLACE WITH SELECT MATERIAL AS SPECIFIED IN THIS SECTION. REMOVAL AND DISPOSAL OF UNSUITABLE SOIL MATERIAL AND PLACEMENT AND
COMPACTION OF SELECT MATERIAL SHALL BE PERFORMED AT NO ADDITIONAL COST TO THE OWNER.
3.9.2 KEEP EXCAVATIONS FREE FROM WATER. EXCAVATE SOIL DISTURBED OR WEAKENED BY THE CONTRACTOR'S
OPERATIONS, AND
SOILS SOFTENED OR MADE UNSUITABLE
FOR SUBSEQUENT
CONSTRUCTION DUE TO EXPOSURE TO WEATHER. REFILL WITH SELECT
MATERIAL AND COMPACT TO 95%
OF ASTM D 698
MAXIMUM DENSITY. UNLESS SPECIFIED OTHERWISE, REFILL
EXCAVATIONS CUT BELOW INDICATED DEPTH WITH SELECT MATERIAL AND
COMPACT TO 95% OF ASTM D 698
MAXIMUM DENSITY.
SIDE SLOPES WHEN ALLOWED SHALL BE
PROTECTED WITH
6-MIL POLYETHYLENE SHEETING.
3.9.3 PIPE TRENCHES: EXCAVATE TO THE DIMENSIONS INDICATED AND AS
SPECIFIED HEREIN. TRENCHES IN
PUBLIC ROADWAYS
SHALL BE EXCAVATED IN ACCORDANCE
WITH THE LATEST
EDITION OF THE VDOT ROAD AND BRIDGE SPECIFICATIONS. WHERE ROCK IS ENCOUNTERED, EXCAVATE AND
REMOVE ROCK TO
A MINIMUM DEPTH OF 6 INCHES BELOW
THE PIPE INVERT.
GRADE BOTTOM OF TRENCHES TO PROVIDE UNIFORM SUPPORT FOR EACH
SECTION OF PIPE AFTER PIPE BEDDING PLACEMENT.
3.9.4 UNSUITABLE SUBGRADE SOIL MATERIALS: SUBGRADES WHICH ARE DETERMINED TO BE UNSUITABLE FOR BEARING NEW EQUIPMENT, STRUCTURES, OR PIPING, SHALL HAVE THE UNSUITABLE
SUBGRADE SOIL MATERIALS REMOVED AND DISPOSED OF, AND REPLACED WITH SELECT MATERIAL AT NO ADDITIONAL COST TO THE OWNER.
3.10 FILLING AND BACKFILLING: FILL AND BACKFILL TO ELEVATIONS AND DIMENSIONS INDICATED. COMPACT EACH LIFT BEFORE PLACING OVERLAYING LIFT.
3.10.1 COMMON FILL PLACEMENT: PROVIDE FOR GENERAL SITE, IN GREEN OPEN SPACE AREAS. PLACE IN 6-INCH LIFTS. COMPACT AREAS NOT ACCESSIBLE TO ROLLERS OR COMPACTORS
WITH MECHANICAL HAND TAMPERS. AERATE MATERIAL EXCESSIVELY MOISTENED BY RAIN TO A SATISFACTORY MOISTURE CONTENT. PROVIDE A SMOOTH FINISH SURFACE BY BLADING, ROLLING
WITH A SMOOTH ROLLER, OR BOTH.
3.10.2 BACKFILL AND FILL MATERIAL PLACEMENT: PROVIDE FOR UNDER PAVEMENT, BUILDINGS & OTHER STRUCTURAL COMPONENTS. PLACE IN 6-INCH LIFTS. PLACE BACKFILL MATERIAL
ADJACENT TO STRUCTURES AS THE STRUCTURAL ELEMENTS ARE COMPLETED AND ACCEPTED. BACKFILL AGAINST CONCRETE ONLY WHEN APPROVED. PLACE AND COMPACT MATERIAL TO
AVOID LOADING UPON OR AGAINST STRUCTURES. PLACE BACKFILL AND FILL MATERIALS TO 5 FEET OUTSIDE OF STRUCTURES.
3.10.3 SELECT MATERIAL PLACEMENT: PROVIDE UNDER ALL STRUCTURES AND CONCRETE SLABS IN TOP 6 INCH. SELECT MATERIALS SHALL BE PROVIDED FROM APPROVED BORROW AREAS. IN
ADDITION, PROVIDE STONE WHERE INDICATED ON THE DRAWINGS. PLACE IN 6-INCH LIFTS. BACKFILL ADJACENT TO STRUCTURES SHALL BE PLACED AS STRUCTURAL ELEMENTS ARE
COMPLETED AND ACCEPTED. BACKFILL AGAINST CONCRETE ONLY WHEN APPROVED. PLACE AND COMPACT MATERIAL TO AVOID LOADING UPON OR AGAINST STRUCTURES.
3.10.4 TRENCH BACKFILLING: BACKFILL AS RAPIDLY AS CONSTRUCTION, TESTING, AND ACCEPTANCE OF WORK PERMITS. PLACE AND COMPACT INITIAL BACKFILL AND BACKFILL MATERIALS IN
6-INCH LIFTS TO THE TOP OF THE TRENCH. TRENCHES IN PUBLIC ROADWAYS SHALL BE BACKFILLED AND COMPACTED IN ACCORDANCE WITH THE LATEST EDITION OF THE VDOT ROAD
AND BRIDGE SPECIFICATIONS.
3.10.5 BEDDING
REQUIREMENTS: EXCEPT AS
SPECIFIED OTHERWISE IN THE INDIVIDUAL
PIPING SECTIONS, PROVIDE BEDDING FOR BURIED PIPING IN ACCORDANCE WITH AWWA C600, TYPE 4,
EXCEPT AS
SPECIFIED HEREIN. PLASTIC
PIPING
SHALL HAVE BEDDING MATERIAL
FROM BENEATH THE
PIPE INVERT TO THE SPRING LINE OF THE PIPE. PROVIDE A MINIMUM BEDDING
2.1.3 SELECT MATERIAL: ASTM D 2487, CLASSIFICATION GW, GP, SW, SP WITH A MAXIMUM OF 10 PERCENT BY WEIGHT PASSING ASTM D 1140, NO. 200 SIEVE. DEPTH OF 4
INCHES BENEATH THE PIPE
INVERT.
WHERE ROCK IS ENCOUNTERED,
PROVIDE A MINIMUM
BEDDING DEPTH OF 6 INCHES BENEATH THE PIPE INVERT.
2.1.4 PIPE BEDDING MATERIAL: VDOT NO. 57 COARSE AGGREGATE. 3.11 COMPACTION:
EXPRESSED AS A PERCENTAGE OF
MAXIMUM DENSITY. DETERMINE IN -PLACE DENSITY OF
THE EXISTING SUBGRADE; IF REQUIRED DENSITY EXISTS, NO COMPACTION OF THE
EXISTING SUBGRADE WILL BE REQUIRED.
2.1.5 AGGREGATE FILL: VDOT NO. 5 OR NO. 57 COARSE AGGREGATE.
3.11.1 GENERAL
SITE: COMPACT UNDERNEATH
AREAS
DESIGNATED FOR VEGETATION AND
AREAS OUTSIDE THE
10-FOOT LINE OF STRUCTURES TO 98% OF ASTM D 698.
2.1.6 RIPRAP: CLASS I DRY RIPRAP AS DEFINED IN THE VIRGINIA DEPARTMENT OF TRANSPORTATION (VDOT) ROAD AND BRIDGE SPECIFICATIONS, SECTION 414, RIPRAP' , UNLESS OTHERWISE
NOTED.
2.2 BORROW: OBTAIN BORROW MATERIALS REQUIRED IN EXCESS OF THOSE FURNISHED FROM EXCAVATIONS FROM SOURCES OFF THE OWNER'S PROPERTY. PROVIDE AND SUBMIT SOIL
CLASSIFICATION TESTING TO ENSURE BORROW MATERIALS MEET THE REQUIREMENTS OF THIS SPECIFICATION.
3.EXECUTION
3.1 CLEARING
3.1.1 REMOVE FROM THE SITE TREES, STUMPS, ROOTS, BRUSH, SHRUBS, DOWN TIMBER, ROTTEN WOOD, RUBBISH, OTHER VEGETATION, AS WELL AS FENCES AND INCIDENTAL STRUCTURES
NECESSARY TO ALLOW FOR NEW CONSTRUCTION.
3.1.2 CLEARING WORK SHALL BE RESTRICTED TO AREA WITHIN `CONSTRUCTION LIMITS/LIMITS OF CLEARINGSPECIFIED IN THIS SECTION AND AS INDICATED ON THE DRAWINGS.
3.1.3 UNDISTURBED STUMPS AND ROOTS, A MINIMUM OF 5 FEET BELOW FINISHED GRADE AND NOT LOCATED UNDER OR WITHIN 10 FEET OF ANY STRUCTURE, MAY BE LEFT IN PLACE. TOPS
OF STUMPS LEFT IN PLACE SHALL NOT BE MORE THAN 6 INCHES ABOVE ORIGINAL GRADE.
3.2 GRUBBING
3.3.1 GRUB AREAS WITHIN AND TO A POINT 10 FEET OUTSIDE OF ALL STRUCTURES, AREAS TO RECEIVE FILL WHERE FINISHED GRADE WILL BE LESS THAN 3 FEET ABOVE EXISTING GRADE,
CUT AREAS WHERE FINISHED GRADE WILL BE LESS THAN 2 FEET BELOW EXISTING GRADE, TRANSITIONAL AREAS BETWEEN CUT AND FILL, AND ANY AREA TO RECEIVE CONTROL FILL.
3.3.2 REMOVE FROM THE GROUND TO A DEPTH OF 24 INCHES ALL STUMPS, ROOTS %-INCH DIAMETER AND LARGER, ORGANIC MATERIAL, AND DEBRIS.
3.3.3 USE ONLY HAND METHODS FOR GRUBBING INSIDE THE DRIP LINES OF TREES THAT ARE TO REMAIN.
3.4 CONSTRUCTION/CLEARING LIMITS
3.4.1 THE CONTRACTOR SHALL NOT DISTURB ANY AREAS OUTSIDE THE CONSTRUCTION LIMITS INDICATED ON THE DRAWINGS WITHOUT EXPRESS WRITTEN PERMISSION FROM THE ENGINEER.
3.4.2 NO CLEAR -CUTTING OF TIMBER SHALL BE PERMITTED WITHIN THE CONSTRUCTION LIMITS. THE CONTRACTOR SHALL MAKE SELECT CUTTING OF TREES, TAKING THE SMALLEST TREES
FIRST, THAT ARE MANDATORY FOR THE CONSTRUCTION OF THE UTILITY LINE. THE ENGINEER'S DECISION SHALL BE FINAL ON DETERMINATION OF WHICH TREES ARE TO BE CUT.
3.5 CLEAN UP DEBRIS RESULTING FROM SITE CLEARING OPERATIONS CONTINUOUSLY WITH THE PROGRESS OF THE WORK.
3.6 REMOVE DEBRIS FROM THE SITE IN SUCH A MANNER AS TO PREVENT SPILLAGE. KEEP PAVEMENT AND AREAS ADJACENT TO SITE CLEAN AND FREE FROM MUD, DIRT, AND DEBRIS AT ALL
TIMES.
3.7 SURFACE PREPARATION
3.7.1 STRIPPING: STRIP EXISTING TOPSOIL, WHEN PRESENT, TO A DEPTH OF 6 INCHES WITHOUT CONTAMINATION BY SUBSOIL MATERIAL. STOCKPILE TOPSOIL SEPARATELY FROM OTHER
EXCAVATED MATERIAL AND LOCATE CONVENIENT TO FINISH GRADING AREA.
3.7.2 UNSUITABLE MATERIAL: REMOVE UNSUITABLE SOIL MATERIALS, WASTE MATERIAL, VEGETATION, DEBRIS, DECAYED VEGETABLE MATTER, SOD, AND MULCH FROM THE CONSTRUCTION SITE.
DISPOSE OF THE UNSUITABLE MATERIAL OFF THE OWNER'S PROPERTY IN ACCORDANCE WITH ALL FEDERAL, STATE, AND LOCAL REGULATIONS.
3.8 PROTECTIONS
3.8.1 PROTECTION SYSTEMS: PROVIDE SHORING, BRACING, AND SHEETING AS REQUIRED IN ACCORDANCE WITH THE U.S. ARMY CORPS OF ENGINEERS SAFETY AND HEALTH REQUIREMENTS
MANUAL, EM-385-1-1, SECTION 25. SHEETING AND SHORING DESIGN SHALL BE SEALED BY A PROFESSIONAL ENGINEER REGISTERED IN VIRGINIA.
3.11.2
STRUCTURES AND
CONCRETE SLABS: COMPACT TOP 12
INCHES OF SUBGRADE TO 98% OF ASTM D 698. COMPACT FILL, BACKFILL, AND SELECT MATERIALS TO 98% OF ASTM D 698.
3.11.3
PIPE TRENCHES:
COMPACT FILL, BACKFILL, AND SELECT
MATERIALS PLACED IN PIPE TRENCHES TO 98% OF ASTM D 698.
3.11.4
ADJACENT AREAS:
COMPACT AREAS WITHIN 10 FEET OF
STRUCTURES TO 98% OF ASTM D 698.
3.11.5 PAVED AREAS: COMPACT TOP 12 INCHES OF SUBGRADE TO 98% OF ASTM D 698. COMPACT FILL, BACKFILL, AND SELECT MATERIALS TO 98% OF ASTM D 698. IN ADDITION TO THE
SPECIFIED COMPACTION REQUIREMENTS, FILL AND BACKFILL MATERIALS SHALL BE COMPACTED TO DEVELOP A CALIFORNIA BEARING RATIO (CBR) OF 10.
3.12 RIPRAP: RIPRAP SHALL BE INSTALLED IN ACCORDANCE WITH THE LATEST EDITION OF THE VDOT ROAD AND BRIDGE SPECIFICATIONS, SECTION 414, RIPRAP.' GEOTEXTILE FABRIC SHALL BE
PLACED UNDER ALL RIPRAP.
3.13 DISPOSITION OF SURPLUS MATERIAL: WASTE UNSUITABLE SOIL MATERIALS OFF THE OWNER'S PROPERTY AS DIRECTED BY THE OWNER AND WW ASSOCIATES IN ACCORDANCE WITH FEDERAL,
STATE, AND LOCAL REGULATIONS.
3.14 FIELD QUALITY CONTROL: THE CONTRACTOR SHALL EMPLOY AN INDEPENDENT TESTING FIRM TO PROVIDE ALL SOIL TESTING REQUIRED FOR THIS PROJECT.
3.14.1 SAMPLING: TAKE THE NUMBER AND SIZE OF SAMPLES REQUIRED TO PERFORM THE FOLLOWING TESTS.
3.14.2 TESTING: PERFORM ONE OF EACH OF THE REQUIRED TESTS FOR EACH MATERIAL USED. PROVIDE ADDITIONAL TESTS FOR EACH SOURCE CHANGE AND AS REQUESTED BY WW
ASSOCIATES.
3.14.2.1 FILL AND BACKFILL: TEST FILL AND BACKFILL MATERIAL IN ACCORDANCE WITH ASTM C 136 FOR CONFORMANCE TO ASTM D 2487 GRADATION LIMITS; ASTM D 1140 FOR MATERIAL
FINER THAN THE NO. 200 SIEVE; ASTM D 423 FOR LIQUID LIMIT AND ASTM D 424 FOR PLASTIC LIMITS; ASTM D 698 OR ASTM D 1557 FOR MOISTURE DENSITY RELATIONS, AS
APPLICABLE.
3.14.2.2 SELECT MATERIAL: TEST SELECT MATERIAL IN ACCORDANCE WITH ASTM C 136 FOR CONFORMANCE TO ASTM D 2487 GRADATION LIMITS; ASTM D 1140 FOR MATERIAL FINER THAN
THE NO. 200 SIEVE; ASTM D 698 OR ASTM D 1557 FOR MOISTURE DENSITY RELATIONS, AS APPLICABLE.
3.14.2.3 DENSITY TESTS: TEST SOIL DENSITY IN ACCORDANCE ASTM D 2922 AND ASTM D 3017. TEST EACH LIFT AT RANDOMLY SELECTED LOCATIONS EVERY 500 SQUARE FEET OF
EXISTING GRADE IN FILLS FOR STRUCTURES AND CONCRETE SLABS, EVERY 500 SQUARE FOR OTHER FILL AREAS, EVERY 1,000 SQUARE FEET OF SUBGRADE IN CUT, AND EVERY
250 LINEAR FEET FOR PIPE LINE INSTALLATION (MINIMUM ONE TEST PER PIPE LINE), AND ADDITIONAL TESTS AS REQUESTED BY WW ASSOCIATES.
NOTE:
ALL EARTHWORK AND SITE WORK SHALL BE DONE IN ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS
DESIGNED BY: PROJECT: SET REV. NO.
TH of 00 _ JDe STONEFIELD BLOCK D-1
? O J I f0♦ ENGINEERS DRAWN BY: VSMP PLAN 2
�. SURVEYORS JDB ALBEMARLE COUNTY, VIRGINIA DRAWING NUMBER:
UJ • PLANNERS TITLE:
DIHR BY: C-2
4 L;c. 267 • EARTHWORK REQUIREMENTS
�z ASSOCIATES HFW
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NO. SHEET REVISION BY DATE NO. SHEET REVISION BY DATE N11N V: N/A
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ASSOCIATES HFW
��,� PO Box 4119 968 Olympia Dr, Smile l SHEET NUMBER:
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NO. s`grONAL wwww smmiale5nel 219040.03 904003C-VSMP-ENS-1.d L H: 1 20 02128120 4 of 9
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2
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C-5
TITLE:
EROSION &SEDIMENT CONTROL PLAN —PHASE 2
DIHR BY:
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SHEET NUMBER:
5 of 9
WWA NUMBER:
219040.03
FILE NAME:
904003C-VSMP_ENS-ENS
DISCIPLINE:
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V.- N/A
DATE:
02128120
NO.
SHEET REVISION
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SHEET REVISION
BY
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G
EROSION & SEDIMENT CONTROL NARRATIVE
I. PROJECT DESCRIPTION
THE PURPOSE OF THIS PROJECT IS FOR THE CONSTRUCTION OF THE STONEFIELD BLOCK D-1 APARTMENT BUILDING
AND IT'S ASSOCIATED PARKING STRUCTURE. THIS PROJECT WILL INVOLVE DISTURBING APPROXIMATELY 2.7 ACRES.
II. EXISTING SITE CONDITIONS
THE SITE IS CURRENTLY A PARKING LOT AS APPROVED ON THE "STONEFIELD BUILDING C1-IV FINAL SITE PLAN",
(SDP2011-00047; WP02011-00055) AND THE EXISTING CONDITIONS AND CONTOURS ON THIS PLAN REPRESENT THE
AS -BUILT CONDITIONS FROM THE CONSTRUCTION OF THESE PLANS.
III. ADJACENT PROPERTIES
THE SITE IS BOUNDED TO THE WEST BY INGLEWOOD DRIVE AND RESIDENTIAL TOWNHOMES, TO THE NORTH BY BOND
STREET AND THE HYATT PLACE HOTEL, TO THE EAST BY DISTRICT AVENUE AND STONEFIELD COMMERCIAL, AND TO THE
SOUTH BY HYDRAULIC ROAD.
IV. OFF -SITE AREAS
NO OFFSITE AREAS ARE ANTICIPATED.
SOILS
ACCORDING TO USDA NRCS SOIL MAPPING, THE PROJECT SITE LIES ON SOIL TYPES: UDORTHENTS (88),
ELIOAK LOAM (27C), AND GLENELG LOAM (34D). A DESCRIPTION OF THE SOIL TYPES FOLLOWS:
88 - UDORTHENTS, LOAMY,
34D - GLENELG LOAM,
2 TO 25 PERCENT SLOPES
15 TO 25 PERCENT SLOPES
HYDROLOGIC SOIL GROUP (NO
RATING)
HYDROLOGIC SOIL GROUP B
K FACTOR, WHOLE SOIL RATING
(NO RATING)
K FACTOR, WHOLE SOIL RATING .24
K FACTOR, ROCK FREE RATING
.24
K FACTOR, ROCK FREE RATING .24
27C - ELIOAK LOAM,
7 TO 15 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B
K FACTOR, WHOLE SOIL RATING
.28
K FACTOR, ROCK FREE RATING
.28
VI. CRITICAL AREAS
CARE SHALL BE TAKEN TO STABILIZE ALL SLOPES AND PREVENT EROSION, TO MINIMIZE THE TRANSPORT OF SEDIMENT
ONTO INTERNAL ROADWAYS, PARKING AREAS, AND HYDRAULIC ROAD. CONTRACTOR SHALL PROVIDE SAFETY FENCE AS
SHOWN. THE CONTRACTOR SHALL PROVIDE SIGNAGE TO ALERT PEDESTRIANS THAT THE SIDEWALKS ON THE EAST SIDE
OF INGLEWOOD DRIVE, THE WEST SIDE OF DISRICT AVENUE, AND THE SOUTH SIDE OF BOND STREET ARE CLOSED.
VII. STORMWATER MANAGEMENT CONSIDERATIONS
POLLUTANT REMOVAL FOR THE PROPOSED IMPROVEMENTS ARE PROVIDED BY THE EXISTING BIOFILTER ON DISTRICT
AVENUE AND THE DOWNSTREAM STORMFILTER AND VORTECHS LOCATED IN BLOCK G. STORMWATER DETENTION IS
PROVIDED WITH THE NORTH UNDERGROUND DETENTION SYSTEM LOCATED IN THE COSTCO PARKING LOT, (BLOCK F).
VIII. OFF -SITE ACTIVITIES
NO OFF -SITE ACTIVITIES ARE ANTICIPATED.
IX. EROSION AND SEDIMENT CONTROL MEASURES
ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND
MAINTAINED BY THE CONTRACTOR IN ACCORDANCE WITH THE LATEST EDITION OF THE VIRGINIA EROSION AND SEDIMENT
CONTROL HANDBOOK. SYMBOLS, DETAILS, AND DIMENSIONS USED ARE TAKEN FROM THE HANDBOOK, AS WELL AS THE
VIRGINIA DEPARTMENT OF TRANSPORTATION'S ROAD AND BRIDGE STANDARDS, VOLUME I, 2008.
A. STRUCTURAL PRACTICES
1. SAFETY FENCE (SAF), 3.01: SAFETY FENCE SHALL BE PROVIDED TO PREVENT UNDESIRABLE ACCESS TO THE
CONSTRUCTION SITE.
2. TEMPORARY CONSTRUCTION ENTRANCE (CE), 3.02: TEMPORARY CONSTRUCTION ENTRANCES SHALL BE IN
ACCORDANCE WITH ALBEMARLE COUNTY REQUIREMENTS. A MINIMUM WATER TAP OF 1" MUST BE INSTALLED WITH A
MINIMUM 1" BALLCOCK SHUTOFF VALVE SUPPLYING A WASH HOSE WITH A DIAMETER OF 1.5" FOR ADEQUATE
CONSTANT PRESSURE OR IN LIEU OF A WATER TAP, EACH CONSTRUCTION ENTRANCE SHALL HAVE A WATER TRUCK
WITH 2 PRESSURE WASHERS AT ALL TIMES. WASH WATER MUST BE CARRIED AWAY FROM THE ENTRANCE TO AN
APPROVED SETTLING AREA TO REMOVE SEDIMENT. ALL SEDIMENT SHALL BE PREVENTED FROM ENTERING STORM
DRAINS, DITCHES OR WATERCOURSES.
3. SILT FENCE (SF), 3.05: SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES
TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE SITE PLAN.
4. STORM DRAIN INLET PROTECTION (IP), 3.07, CULVERT INLET PROTECTION (CIP), 3.08: STORM DRAIN INLET
PROTECTION AND CULVERT INLET PROTECTION SHALL BE PROVIDED AS SHOWN ON THE PLANS.
5. TEMPORARY DIVERSION DIKE (DID), 3.09, TEMPORARY RIGHT-OF-WAY DIVERSION (RWD), 3.11: TEMPORARY
DIVERSION DIKES AND TEMPORARY RIGHT-OF-WAY DIVERSIONS SHALL BE PROVIDED AS SHOWN OR AS NEEDED TO
DIVERT SEDIMENT -LADEN RUNOFF TO A STABLIIZED OUTLET.
6. TEMPORARY SEDIMENT TRAP (ST), 3.13: TEMPORARY SEDIMENT TRAP TO BE CONSTRUCTED AS SHOWN ON THE
PLANS TO COLLECT AND DETAIN SEDIMENT LADEN RUNOFF LONG ENOUGH TO ALLOW A MAJORITY OF THE SEDIMENT
TO SETTLE OUT BEFORE BEING DISCHARGED FROM THE SITE.
7. TREE PROTECTION (TP), 3.38: PROVIDE AS SHOWN ON PLANS TO ENSURE THE PROTECTION OF DESIRABLE TREES
DURING CONSTRUCTION.
8. DUST CONTROL (DC), 3.39: PROVIDE DUST CONTROL AS NECESSARY TO HELP REDUCE THE PRESENCE OF
AIRBORNE SUBSTANCES DURING LAND DISTURBING ACTIVITIES.
B. VEGETATIVE PRACTICES
1. TOP SOILING & STOCKPILING (TO), 3.30: TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED
FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION AND HAVE SILT FENCE INSTALLED
ALONG THE LOWER PERIMETER. STOCKPILES SHALL BE LOCATED AS SHOWN ON THE PLANS.
2. REFER TO "ALBEMARLE COUNTY GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS"
#17 AND #18 AND TO TABLE 3.32-D AND TABLE 3.31-B FOR ADDITIONAL INFORMATION.
C. MINIMUM STANDARDS
MS-1. STABILIZATION OF DENUDED AREAS:
PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN 7 DAYS AFTER FINAL
GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN 7 DAYS
TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE, BUT WILL REMAIN DORMANT OR UNDISTURBED FOR LONGER
THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE
THAN ONE YEAR.
MS-2. STABILIZATION OF SOIL STOCKPILES:
DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED
WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR TEMPORARY PROTECTION AND PERMANENT
STABILIZATION OF ALL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM
THE PROJECT SITE.
MS-3. PERMANENT VEGETATIVE COVER:
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, IN THE OPINION OF THE E&S INSPECTOR, IS UNIFORM AND MATURE ENOUGH TO SURVIVE AND INHIBIT EROSION.
MS-4. TIMING AND STABILIZATION OF SILT TRAPPING MEASURES:
SEDIMENT BASINS AND TRAPS, STORM INLET PROTECTION, SILT FENCING, AND OTHER MEASURES INTENDED TO TRAP
SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND DISTURBING ACTIVITY AND SHALL BE MADE
FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.
MS-5. STABILIZATION OF EARTHEN STRUCTURES:
STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS
IMMEDIATELY AFTER INSTALLATION.
MS-6. SEDIMENT BASINS AND TRAPS:
SEDIMENT TRAPS & BASINS SHALL BE CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED.
A. THE MINIMUM CAPACITY OF A SEDIMENT TRAP SHALL BE 134-CUBIC YARDS PER ACRE OF DRAINAGE AREA, AND
SHALL CONTROL A DRAINAGE AREA OF LESS THAN 3-ACRES.
B. THE MINIMUM CAPACITY OF A SEDIMENT BASIN SHALL BE 134-CUBIC YARDS PER ACRE OF DRAINAGE AREA, AND
SHALL CONTROL A DRAINAGE AREA OF 3-ACRES OR GREATER.
MS-7. CUT AND FILL SLOPES:
CUT AND FILL SLOPES SHALL BE 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.
MS-8. CONCENTRATED RUNOFF DOWN CUT OR FILL SLOPES:
CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE
TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE.
MS-9. WATER SEEPAGE FROM A SLOPE FACE:
WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED.
MS-10. STORM SEWER INLET PROTECTION:
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.
MS-11. STABILIZATION OF OUTLETS:
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.
MS-12. WORK IN LIVE WATERCOURSES:
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. NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS.
EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NONERODIBLE COVER MATERIALS.
MS-13. CROSSING A LIVE WATERCOURSE:
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 NONERODIBLE MATERIALS SHALL BE PROVIDED.
MS-14. APPLICABLE REGULATIONS:
ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE
WATERCOURSES SHALL BE MET.
MS-15. STABILIZATION OF BED AND BANKS: N/A
THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS
COMPLETED.
MS-16. UNDERGROUND UTILITIES:
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. WHERE CONSISTENT WITH SAFETY AND SPACE CONSIDERATIONS, EXCAVATED MATERIAL IS TO BE PLACED ON THE
UPHILL SIDE OF TRENCHES, EXCEPT FOR ANY DIVERSION DITCHES.
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 OFFSITE PROPERTY.
D. TRENCH BACKFILL MATERIAL SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE
STABILIZATION.
E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS.
F. ALL APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH AT ALL TIMES.
MS-17. CONSTRUCTION ACCESS ROUTES:
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, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF
EACH DAY. SEDIMENT SHALL BE REMOVED BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT DISPOSAL
AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION
SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES.
MS-18. TEMPORARY E&S CONTROL MEASURE REMOVAL:
ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE
STABILIZATION OR AFTER TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE
LOCAL E&S 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.
MS-19. ADEQUACY OF RECEIVING CHANNELS:
PROPERTIES AND WATERWAYS DOWNSTREAM FROM THE DEVELOPMENT SITE SHALL BE PROTECTED FROM SEDIMENT
DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATES OF STORM WATER
RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION.
D. MAINTENANCE:
ALL EROSION AND SEDIMENT CONTROL STRUCTURES AND SYSTEMS SHALL BE MAINTAINED, INSPECTED, AND REPAIRED
AS NEEDED TO INSURE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTION. ALL EROSION AND SEDIMENT
CONTROL MEASURES SHALL BE CHECKED AT THE END OF EACH DAY AND AFTER EVERY RAINFALL EVENT.
1. DAMAGE TO EROSION CONTROL MEASURES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY SHALL BE
REPAIRED BEFORE THE END OF EACH WORKING DAY.
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3. SAFETY FENCE (SAF), 3.01: SAFETY FENCE SHALL BE CHECKED REGULARLY FOR DAMAGE. ANY NECESSARY REPAIRS
SHALL BE MADE IMMEDIATELY. CARE SHOULD BE TAKEN TO SECURE ALL ACCESS POINTS (GATES) AT THE END OF
EACH WORKING DAY. ALL LOCKING DEVICES MUST BE REPAIRED OR REPLACED AS NECESSARY.
4. CONSTRUCTION ENTRANCE (3.02): PROVIDE FOR EQUIPMENT WASHING AS NEEDED TO PREVENT THE TRANSPORT OF
SOIL ONTO EXISTING ASPHALT ROADWAYS. ANY SEDIMENT ON THE PAVEMENT SHALL BE REMOVED IMMEDIATELY.
5. SILT FENCE (3.05): SILT FENCE BARRIERS WILL BE CHECKED DAILY FOR UNDERMINING OR DETERIORATION OF THE
FABRIC. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL REACHES HALF WAY TO THE TOP OF THE BARRIER.
6. STORM DRAIN INLET PROTECTION (IP), 3.07 AND CULVERT INLET PROTECTION (CIP), 3.08: STORM DRAIN INLET
PROTECTION AND CULVERT INLET PROTECTION SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS
NEEDED.
7. TEMPORARY DIVERSION DIKE (DD), 3.09 AND TEMPORARY RIGHT-OF-WAY DIVERSION (RWD), 3.11: THE MEASURES
SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIVERSION AS NECESSARY. ONCE EVERY
TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURES SHALL BE INSPECTED AND
REPAIRS MADE IF NEEDED.
8. SEEDING (3.31/ 3.32): AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION
WILL BE RESEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
9. DUST CONTROL (3.39): PROVIDE DUST CONTROL IN AREAS SUBJECT TO SURFACE AND AIR MOVEMENT OF DUST
WHERE ON -SITE AND OFF -SITE DAMAGE IS LIKELY TO OCCUR IF PREVENTIVE MEASURES ARE NOT TAKEN.
10. TREE PROTECTION (3.38): INSPECT TREE PROTECTION TO ENSURE NO CONSTRUCTION DAMAGE IS OCCURRING.
ALBEMARLE 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 SPECIFICATION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
REGULATIONS VR 625-02-00 EROSION AND CONTROL SEDIMENT 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 FOR 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 TO COMPLIANCE WITH SECTION 13-301 OR THE CODE OF
ALBEMARLE.
14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO
THE HOURS OF 7:OOA.M. TO 9:00 P.M.
15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL
SUPPORT, IN ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND
IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF 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 OF 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 TO BE APPLIED AT 80LBS/100SF.
ALTERNATIVES ARE SUBJECT TO APPROVAL 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 18OLBS/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/1000SF. ALTERNATIVES ARE SUBJECT TO APPROVAL 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 REPAIRED 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.
21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF
APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G).
22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER
THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION
17-207B).
SEQUENCE OF CONSTRUCTION
1. CONTRACTOR TO SCHEDULE AND ATTEND A PRE -CONSTRUCTION MEETING WITH ALBEMARLE COUNTY AND
OBTAIN ALBEMARLE COUNTY LAND DISTURBANCE PERMIT PRIOR TO THE START OF ANY LAND DISTURBING/
CONSTRUCTION ACTIVITIES ASSOCIATED WITH THIS PLAN.
2. INSTALL PERIMETER CONTROLS, SAFETY FENCE, AND INLET PROTECTIONS IN LOCATIONS SHOWN ON THE
PLANS PRIOR TO BEGINNING CONSTRUCTION.
3. PERFORM DEMOLITION AND GRADING OPERATIONS TO BRING SITE TO ELEVATIONS AND MAINTAIN POSITIVE
DRAINAGE TO SEDIMENT TRAPPING DEVICES. STABILIZE AREAS AS THEY ARE BROUGHT TO GRADE.
4. CONSTRUCT IMPROVEMENTS AS SHOWN ON PLANS.
5. STABILIZE ALL REMAINING DISTURBED AREAS.
6. ALL EROSION AND SEDIMENT CONTROLS SHALL BE REMOVED WITHIN 30 DAYS OF FINAL SITE
STABILIZATION OR WHEN MEASURES ARE NO LONGER NEEDED. REMOVALS ARE SUBJECT TO APPROVAL BY
THE COUNTY EROSION CONTROL INSPECTOR.
7. CLOSE OUT THE PROJECT.
OF DESIGNEJDe: PROJECT: STONEFIELD BLOCK D-1 SET REV. NO.
I '^
O � Z ENGINEERS DRAWN BY: VSMP PLAN 2
SURVEYORS JDB ALBEMARLE COUNTY, VIRGINIA DRAWING NUMBER:
U �J� PLANNERS TITLE:
Lic267 ASSOCIATES DIHR BY: EROSION & SEDIMENT CONTROL NARRATIVE C-6
� . �
�' Ham'
10 rySHEET NUMBER:
s> % �( :S�V
20 PO Box4119 968Olympia Dr, Suite l WWA NUMBER: FILE NAME: DISCIPLINE: SCALE: DATE:
Lynehbu,g VA 24502 Chulmtrsville, VA 22911
Phone_ 4343166080 Phone_ 4349842700
NO. SHEET REVISION BY DATE N0. SHEET REVISION BY DATE S`SIONAL w a..ne�a,e ne, 219040.03 904003C_VSMP_ENS-3.d k4L V: N/A 02128l2o 6 of 9
STONE 70' MIN,
CONSTRUCTION
ACCESS 3" SM-2A ASPHALT TOP
COURSE
2% 2%
6" WN. 21.A AGGREGATE BASE
PROFILE
STONE 70' MIN.
CONSTRUCTION rASPHALT PAVED
ACCESS -\ f� / WASHRACK
PAVEMENTI
(EXISTINC
2% ?%: PAVEMENT'
' 2% 12' MIN.*
I—
POSITIVE DRAINAGE
*MUST EXTEND FULL WIDTH —l:J TO SEDIMENT
OF INGRESS AND EGRESS { OPERATION TRAPPING DEVICE
PLAN
12' MIN.
2%
SITIVE DRAINAGE I
SEDIMENT
APPING DEVICE
FILTER CLOTH) _
SECTION A —A
A ininfinu n water tap of 1 inch must be installed with a niiilifumu 1 inch ballcock
shutoff valve Supplying a wash !lose with a diameter of 1.5 'niches for adequate
constant pressure. Wash water must be carried away from the entrance to an
approved settling area to remove sednnent. All seduneiit shall be preveiited fioin
entering stork) drains, ditches of watercourses.
PAVED WASH RACK CE
N O S,' _"
FENCING AND ARMORING 11
DRIP LINE1\
SNOW FENCE
BOARD FENCE
NCE
CORRECT METHODS OF TREE FENCING
00-_ CORRECT TRUNK ARMORIN
TRIANGULAR BOARD FENCE
Source: Va. DSWC
Plate 3.38-2
SAFETY FENCE
PERSPECTIVE VIEW
PERSPECTIVE VIEW
PLASTIC FENCE
u
PERSPECTIVE VIEW
METAL FENCE SAF
Source: Adapted from Conwed Plastics and Plate 3.01-1
VDOT Road and Bridge Standards
SILT FENCE CULVERT INLET
PROTECTION
ENOWALL
----------- ------�-----------______ ----
TOE OF FILL ` j— ,L CULVERT
_-----__ ---
FILL
• TOE OF F
SILT FENCE
* DISTANCE IS 6' MNIMUM IF ROW
IS TOWARD EMBANKMENT
ROW
OPTIONAL STONE COMBINATION
1.a' 1 s•
FLAW ti
2.5'
*' CUSS I RIPRAP
VDOT #3, #357 OR #5 COARSE AGGREGATE
TO REPLACE SILT FENCE IN HORSESHOE WHEN C I P
HIGH VELOCITY OF FLOW IS EXPECTED
Source: Adapted from VDOT Standard
Sheets and Va. DSWC Plate 3.08-1
CONSTRUCTION OF A SILT FENCE
(WITHOUT WIRE SUPPORT)
1. SET THE STAKES. 2. EXCAVATE A 47X 4" TRENCH
UPSLOPE ALONG THE LINE OF
STAKES.
6'MAX.
FLOW /
3. STAPLE FILTER MATERIAL
TO STAKES AND EXTEND
IT INTO THE TRENCH.
C
4. BACKFILL AND COMPACT
THE EXCAVATED SOIL.
SHEET FLOW INSTALLATION
(PERSPECTIVE VIEW)
Source: Adapted from Installation of Straw and Fabric Filter
Barriers for Sediment Control, Sherwood and Wyant
Plate 3.05-2
TEMPORARY SEDIMENT TRAP
I -I VARIABLE^
ORIGINAL VARIABLE
GROUYr• / ELEV.ND
67 CU. YD./ACRE
0'
p VARIABLE
67 CU. YD./ACRE j
(EXCAVATED) ANX \
FILTER CLOTH ORIGINAL
GROUND
ELEV,
SEE PLATE 3.13-1 COARSE AGGREGATE** CLASS I RIPRAP
CROSS SECTION OF OUTLET
_ CLASS I RIPRAP
(IN GTHAC. (IN FEET) _
6 X DRAINAGE AREA
(IN AC.)
> / / ONION
DIKE
COARSE AGGREGATE�`
D(CAVATED / FILTER CLOTH
AREA
f**COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5
OUTLET (PERSPECTIVE VIEW)
Source: Va. DSWC Plate 3.13-2
GRAVEL CURB INLET SEDIMENT
FIL TER
GRAVEL FILTER"
RUNOFF WATER
SEDIMENT
CONCRETE GUTTER
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS
WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE
INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED
AREAS.
* GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. I P
Source: Va. DSWC
TEMPORARY DIVERSION DIKE
Soil
I
18" min.
1 —Flow
4.5' min.
Va. DSWC
Plate 3.07-6
Sl
Plate 3.09-1
TABLE 3.32-D
SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA
Total Lbs.
Per Acre
Minimum Care Lawn
- Commercial or Residential 175-200 lbs.
- Kentucky 31 or Turf -Type Tall Fescue 95-100%
- Improved Perennial Ryegrass 0-5%
- Kentucky Bluegrass 0-5%
Hieh-Maintenance Lawn 200-250 lbs.
- Kentucky 31 or Turf -Type Tall Fescue 100%
General Slope (3:1 or less)
- Kentucky 31 Fescue 128 lbs.
- Red Top Grass 2 lbs.
- Seasonal Nurse Crop * 20 lbs.
1501bs.
Low -Maintenance Slope (Steeper than 3:1)
- Kentucky 31 Fescue 108 lbs.
- Red Top Grass 2 lbs.
- Seasonal Nurse Crop * 20 lbs.
- Crownvetch ** 20 lbs.
150 lbs.
* Use seasonal nurse crop in accordance with seeding dates as stated below:
February 16th through April ...................... Annual Rye
May 1st through August 15th ..................... Foxtail Millet
August l6ththrough October ...................... Annual Rye
November through February 15th................... Winter Rye
Substitute Sericea lespedeza for Crownvetch east of Farmville, Va. (May
through September use hulled Sericea, all other periods, use unhulled Sericea).
If Flatpea is used in lieu of Crownvetch, increase rate to 301bs./acre. All legume
seed must be properly inoculated. Weeping Lovegrass may be added to any slope
or low -maintenance mix during warmer seeding periods; add 10-20 lbs./acre in
mixes.
TABLE 3.31-B TS
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS
"QUICK REFERENCE FOR ALL REGIONS`
Rate
Planting Dates Species abs./acre)
Sept. 1 - Feb. 15 50/50 Mix of
Annual Ryegrass
(Lolium multi-flomm)
& 50 - 100
Cereal (Winter) Rye
(Secale cereale)
Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100
. (LAlium multi-flomm)
May 1 - Aug 31 German Millet 5o
(Setaria italics)
EROSION AND SEDIMENT CONTROL LEGEND
H
SAF SAFETY FENCE I 3.13SED MNTR TRAPTEMPORARY
ST
H
CONSTRUCTION ONE CE TEMPORARY SEEDING
TS —
ENTRANCE 3.31
E
H
SILT FENCE SF X—X— H
PERMANENT SEEDING PS
DRAIN
H
INLETMPROTECTION e
H
MULCHING MU Mu
TREE PRESERVT
R
pULVERT R TECTIONL� C P ® 3.38 AND PROT CTIOANIONTEMPORA
R
DIVERS ONYDIKE S F31
DUST CONTROL S
— o--
rH of � DESIGNED BY PROJECT: STONEFIELD BLOCK D-1 SET REV. NO.
o t, IY— ENGINEERS JDB VSMP PLAN 2
ab DRAWN BY..
U �Z SURVEYORS JDB ALBEMARLE COUNTY, VIRGINIA DRAWING NUMBER:
PLANNERS TITLE:
J . DIHR BY. DETAILS C—]
LiG. 267 4 ASSOCIATES
HFW
��•� 7—�—%� .1�� PO Box 4119 968 Olympia Dr, Suite) SHEET NUMBER:
1 Lymhbur,VA24502 Ch ]lW ill VA229n WWA NUMBER: FILE NAME: DISCIPLINE: SCALE: DATE:
Phone: 434.3166080 Phom 434.984.2700
NO. s`g1ONAL �'� wwwwxasso iatesnel 219040.03 904003C_1/SMP_DET—l.d ML H: N/A 02/2s/2o ] of 9
SHEET REVISION BY DATE NO. SHEET REVISION BY DATE V: N/A
e
�� ��� � � -/►�-/��// III/ ��/g��/��I
i►BOND ST.
4 3
I
I
3
3
�Q it
PrA
I
3
I
311
r
1
3
\
-
_�
HYDRAULIC ROAD
POST -DEVELOPED BMP
ANALYSIS AREA
STORMWATER NARRATIVE
STORMWATER DETENTION FOR THE IMPROVEMENTS PROPOSED WITH THIS
SITE PLAN ARE PROVIDED BY THE PERMANENT NORTH SWM FACILITY
LOCATED IN THE ADJACENT COSTCO PARKING LOT. DETAILS FOR THE
FACILITY ARE PROVIDED ON THE ALBEMARLE PLACE STORMWATER
MANAGEMENT PLAN AMENDMENT NO.4, WPO# 2010-00023 AND WPO#
2013-69. AN ASSUMED POST DEVELOPED IMPERVIOUS COVER OF 90%
WAS UTILIZED IN THE DESIGN OF THE UNDERGROUND DETENTION
SYSTEM FOR ALL ON -SITE COMMERCIAL AREAS. THE PROPOSED
IMPERVIOUS COVER FOR BLOCK D1 IS 83.4%. THEREFORE THE EXISTING
NORTH UGD IS ADEQUATE TO PROVIDE STORMWATER DETENTION FOR
THE PROPOSED IMPROVEMENTS AND THE POST -DEVELOPED RELEASE
RATE HAS DECREASED FROM THE ORIGINAL ANALYSIS.
STORMWATER QUALITY FOR THE IMPROVEMENTS PROPOSED WITH THIS
SITE PLAN ARE PROVIDED BY THE STORMFILTER AND VORTECHS UNITS
CONSTRUCTED AS PART OF THE ALBEMARLE PLACE STORMWATER
MANAGEMENT PLAN AMENDMENT NO.4, WPO# 2010-00023 AND THE
BIOFILTER INSTALLED AS PART OF THE STONEFIELD BOULEVARD ROAD
PLAN, WPO# 201 1-00036. THE ORIGINAL BMP ANALYSIS FOR BLOCK
D1 WAS DEFINED AS PART OF THE STONEFIELD BUILDING C1-IV FINAL
SITE PLAN, WPO# 201 1-00055. THE SITE IS GRANDFATHERED PER
9VAC25-870-48 AND MEETS THE WATER QUALITY REQUIREMENTS OF
PART II C SET FORTH IN 9VAC25-870-96. PER PART II C THE
STORMFILTER AND VORTECHS UNITS PROVIDE A POLLUTANT REMOVAL
RATE OF 60% AND THE FILTERRAS PROVIDE A POLLUTANT REMOVAL
RATE OF 74%.
THE REQUIRED OVERALL POLLUTANT REMOVAL RATE IS 74% FOR THE
RE -DEVELOPMENT OF BLOCK D. PLEASE REFER TO BMP COMPUTATIONS
USING THE SIMPLE METHOD WORKSHEET PROVIDED ON THIS DRAWING.
POLLUTANT REMOVAL CALCULATIONS - D1 PARKING
REFERENCE SIMPLE METHOD WORKSHEETS AND BMP ANALYSIS AREAS ON THIS
SHEET.
TOTAL BMP ANALYSIS AREA = 3.01 ACRES
TOTAL L(PRE) = 4.25 LBS
TOTAL L(POST) = 14.79 LBS
TOTAL POLLUTANT REMOVAL REQUIRED = 10.97 LBS
BIOFILTER POLLUTANT REMOVAL RATE = 65%
STORMFILTER & VORTECHS POLLUTANT REMOVAL RATE = 60%
POLLUTANT REMOVED BY BIOFILTER
(0.65)14.79 LBS = 9.61 LBS
POLLUTANT LOAD REMAINING = 14.79 LBS - 9.61 LBS = 5.18 LBS
POLLUTANT REMOVED BY STORMFILTER & VORTECHS
(0.60)5.18 LBS = 3.11 LBS
TOTAL POLLUTANT LOAD REMOVED IN BLOCK D1
9.61 + 3.11 = 12.72 LBS
NET POLLUTANT REMOVAL REQUIRED
12.72 LBS - 10.97 LBS = 1.75 LBS (SURPLUS)
PER WPO# 2011-00055 THE REGAL SITE DRAINS TO THE SOUTH UGD
AND STORMFILTER SYSTEM. THE REGAL SITE HAS A 1.68 LB DEFICIT
AND IS COMPENSATED FOR BY THE SURPLUS FROM BLOCK D1 TREATED
IN THE NORTH SYSTEM. THIS RESULTS IN A TOTAL SURPLUS OF 0.07
LBS FOR THE COMBINED SITES. THEREFORE THE EXISTING NORTH UGD,
STORMFILTER, VORTECHS SYSTEM OVERALL REMOVAL RATE IS HIGHER
THAN REQUIRED AND THE SYSTEM IS ADEQUATE AS DESIGNED.
Sediment Trap #1 Design
1 vAmtar
drainage area (acres) (<3)
2.2
oR,� CREST OF STONE WEIR
ROUND
pn19E
trap volumes:
G
E«,
hi
elevation (ft)
area (sD volume(cy)
491
832
DRY STORAGE
N
WAB
492
1120
36A
493
1440
83.6
494
1792
143.4
WETSTORAGE
r, uvl
495
2176
216.9
f°rJM 01
ER CLDTH Dam.,
496
2592
305.2
" GROUNDnEV. Ev.
-SEE PLATE 3.13-1
ClWtSE N,CAEWTE- CUSS I RIPRAP
wet storage:
wet storage required (cy) (67'DA)
147.4
bottom of stone weir (ft)
494.1
wet storage provided at this elevation (cy)
150.8
slope of wet storage sides
2:1
weir length (it) (6xDA)
13.2
dry storage:
bottom of trap elevation (ft)
491
dry storage required Icy) (67'DA)
147.4
bottom trap dimensions:
52'x16'
crest of stone weir
496.0
top of dam elevation (it)
496
dry storage provided at this elevation
(cy)
154A
top width of dam (it)
2.5
slope of dry storage sides
2:1
top trap dimensions
72'x36'
Short Version BMP Computations For Worksheets 2 - 6
Albemade County Water Protection Ordinance: Modified Simple Method
Plan : Buildina C-IV Site Plan Water Resources Area
Preparer. JDB Date: REV 5/1820
Project Drainage Area Designation D1 Parking Area
L storm pollutant export in pounds, L = [P(Pj)RW12 ] [ C(A)2.72 ]
Rv mean runoff coefficient, Rv=0.05+0.009(I)
Pj small storm correction factor, 0.9
1 percent imperNousness
P annual precipitation, 43" in Albemarle
A project area in acres in subject drainage area, A = 3.01
C pollutant concentration, mg/1 a ppm target phosphorus
f factor applied to RR
V required treatment volume in cy, 0.5" over imperv. area = A(1)43560(0.5/12)/27
RR required removal , L(post) - f x L(pre)
%RR removal efficiency , RR100/L(post)
Impervious Cover Computation (values In feet & square feet)
Length Width
Driveways
and walks
Roadways
Parking Lots Area 1 Area 2 Area 3 Area 4 Area 1 Area 2 Area 3 Area 4
0
Gravel areas Area 1 Area 2 subtotal Area 1 Area 2 subtotal
'x 0.70 = x 0.70 =
Structures Area no. subtotal Area no.
Buildings
109,356
Actively -grazed pasture & Area Area
yams and cultivated turf x 0.08 = x 0.08 =
Active crop land Area Area
F�::=x 0.25 = F----Jx 0.25 =
Other Impervious Areas Area 1 Area 2 Area 3 Area 1 Area 2 Area 3
Impervious Cover 0% 83%
I(pre) I(post)
"Post) V
0.80 168.8
New Development (For Development Areas, existing Impervious cover <= 20%)
C
f
I I (pre) *
I Rv(pre)
L(p
0.70
1.00
1.00
20%
0%
0.23
0.05
4
0.35
0
0.40
1.00
1%
0.06
0
re) L(
.25
.46
62
post)
RR
% RR
I Area Type
14.79
7.40
10.55
6.94
71%
Development Area
Drinking Water Watersheds
94%
8.45
7.83
93%1
Other Rural Land
" min. values
Redevelopment (For Development Areas, existing
impervious cover>
20%)
F-c-T
f
I I (pre)*
Rv(pre)
L(pre)
L(post)
RR
%RR
Area Type
0.70
0.90
20%
0.23
4.25
14.719
10.97
74%1
Development Area
0.35
0.85
0%
0,05
0.464
7.40 1
7.00
95%
Drinking Water Watersheds
0.40
0.85
1%
0.06
0.62 I
8.45
7.92
94%1
Other Rural Land
rev 30 May 2002 JMK
01&_ COUNTY OF ALBEMARLE
B Department of Community Development
Construction Record Drawings (As -built) for VSMP
The following is a list of information required on construction record drawings for
stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the
construction record drawing be prepared by someone other than the designer. Please do not
provide design drawings as construction record drawings.
A. A signed and dated professional seal of the preparing engineer or surveyor.
B. The name and address of the firm and individual preparing the drawings on the title sheet.
C. The constructed location of all items associated with each facility, and the inspection records to verify
proper dimensions, materials and installation. The items include, but are not limited to the following:
1. Inspection Records and photographs for pipe trenches and bedding, including underdrains.
2. Video Pipe Inspection for any pipes which are not accessible or viewable.
3. Updated Location with geo-coordinates of all facilities.
4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities.
5. Current physical and topographic survey for all earthen structures. Ponds should include a survey
of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required
for alterations from the design.
6. Plants, location and type.
7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the
installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s),
inlet and outlet protection, alignment and invert elevations compared to design.
8. Computations: For significant deviations from design, provide sealed computations verifying that
the as -built condition is equivalent or better than design.
9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical
sections and linings.
10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage
must be within platted easements. Provide copies of recorded documents.
11. Guardrail, fences or other safety provisions - Display the constructed location of all safety
provisions; fences, guardrail, including the type, length and applied end treatments, compared to
design.
12. Material layers - biofilter media, stone layers, sand layers, keyways and cores must be verified as to
material types and depths. Include inspection reports, boring or test pit reports and materials
certifications. Biofilter media must be an approved state mix.
13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable.
14. Compaction reports are required to verify fill compaction in dams.
15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning.
1
REV CALCS PER NEW FOOTPRINT; ADDED VSMPAS-BUILT SHEET
JDB
05/21/20
SH Qp
o P
ab
J
Lie. 267 a
��„�
s`gIONAL
�
IY- ENGINEERS
SURVEYORS
PLANNERS
ASSOCIATES
TO Box 4119 968 Olympia Dr, Suite I
Lynchbur,VA24502 Cnar]aa iR vA:29n
Phone: 434.3166080 Phone 434.984.2700
www saciatesaet
DESIGNED BY:
JDB
PROJECT: STONEFIELD BLOCK D-1
VSMP PLAN
ALBEMARLE COUNTY, VIRGINIA
SET REV. NO.
2
DRAWN BY.
JDB
DRAWING NUMBER:
C'-8
TITLE:
BMP ANALYSIS & CALCULATIONS
DIHR BY.
HFW
SHEET NUMBER:
8 Of 9
WWA NUMBER:
219040.03
FILE NAME:
904003C_VSMP_SWM-1.
DISCIPLINE:
L
SCALE:
w=
H: 1 20
V: N/A
DATE:
02/28/20
NO.
SHEET REVISION
BY
DATE
NO.
SHEET REVISION
BY
DATE
E Ttm
460
455
10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 14+99.87
STORM PROFILE
STRUCTURES EX43 THROUGH 43.6
STORM SEWER DESIGN WWA PROJECT NUMBER: 208026.02
COMPUTATIONS COUNTY:ALBEMARLE DISTRICT
DESCRIPTION: PUBLIC ROADS
SHEET 1 OF1
FROM
POINT
TO
POINT
AREA
DRAIN
"A"
RUN-
OFF
COEF
CA
INLET
TIME
(TO
RAIN
FALL
010)
RUNOFF
O
INVERT
ELEVATIONS
LENGTH
SLOPE
DIA
MANNNGS
It
GAPA-
CITY
(FULL)
VEL
(FULL)
FLOW
TIME
REMARKS
TOP INLET
ELEVATIONS
INLET DEPTH
(H)
INLET No.
ACRES
C
INCRE-
MENT
ACCUI-
UTATED
MIN
IWHR
CFS
UPPER
END
LOWER
END
FT
F17FT
IN
CPS
FPS
SEC
FT
FT
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
46.8
46.7
0.04
0.90
0.04
0.04
5.0
6.7
0.2
505.12
502.20
50.48
0.0578
15
0.010
20.3
16.5
3.1
511.24
6.12
46.8
46.7
46.6
0.00
0.90
0.00
0.04
5.1
6.6
0.2
502.00
501.43
27.6
0.0207
15
0.010
12.1
9.9
2.8
508.50
6.50
46.7
46.6
46.5
0.09
0.85
0.08
0.11
5.1
6.6
0.7
501.23
496.02
77.6
0.0672
15
0.010
21.8
17.8
4A
505.41
4.18
46.6
46.9
46.5
0.19
0.80
0.15
0.15
5.0
6.7
1.0
495.56
494.55
60.1
0.0168
15
0.010
10.9
8.9
6.8
501.91
6.35
46.9
46.5
46A
0.11
0.85
0.09
0.36
5.2
6.6
2.4
494.35
489.14
198.9
0.0262
15
0.010
13.6
11.1
17.9
500.49
6.14
46.5
46.4
46.3
2.52
0.80
2.02
2.37
5.5
6.5
15.5
488.04
487.22
52.9
0.0155
24
0.010
36.7
11.7
4.5
Includes lows tom Block D 1
494.29
6.25
46.4
46.3
46.2
0.16
0.80
0.13
2.50
5.5
6.5
16.2
487.12
485.39
167.4
0.0103
24
0.010
30.0
9.5
17.5
494.30
7.18
46.3
46.2
46.1
0.12
0.80
0.10
2.60
5.8
6.4
16.6
485.29
482.41
231.0
0.0125
24
0.010
32.9
10.5
22.0
492.14
6.85
46.2
46.1
43.1
0.15
0.85
0.13
2.73
6.2
6.3
17.1
482.21
481.47
84.9
0.0087
24
0.010
27.5
8.8
9.7
490.01
7.80
46.1
43.6
43.5
0.56
0.81
OA5
OA5
7.0
6.1
2.8
486.63
1 486.04
25.7
0.0229
15
0.010
12.8
10.4
2.5
Includes lows Bond St
494.33
7.70
43.6
43.5
43A
0.00
0.90
0.00
OA5
7.0
6.1
2.7
485.94
484.91
65.4
0.0157
15
0.010
10.6
8.6
7.6
493.90
7.96
43.5
43.4
43.3
0.55
0.80
OA4
0.89
7.2
6.0
5.4
484.81
484.39
46.9
0.0090
18
0.010
13.0
7.3
6A
492.46
7.65
43.4
43.3
43.2
0.29
1 0.88
1 0.26
1.15
7.3
6.0
6.9
484.19
483.18
97.3
0.0104
21
0.010
21.0
8.8
11.1
491.94
7.75
43.3
43.2
43.1
0.18
0.85
1 0.15
1.30
7.5
5.9
7.7
482.98
481.47
172.3
0.0088
30
0.010
50.1
10.2
16.9
490.93
7.95
43.2
43.1
43
0.20
0.80
0.16
4.19
7.7
5.9
24.6
481.27
479.16
1 69.5
0.0304
30
0.010
93.2
19.0
3.7
489.22
7.95
1 43.1
23
22
9.21
11.74
5.0
46.5
483.83
480.20
240.15
0.0151
42
0.010
161.2
16.8
14.3
Future Development Flow
499.08
15.25
23
22.1
22
1.85
0.85
1.57
1.57
7.0
6.1
9.5
482.83
482.11
28.1
0.0256
18
0.010
21.9
12A
2.3
489.93
7.10
22.1
22
43
2.28
0.85
1.94
12.72
11.98
5.0
63.6
480.06
478.40
26.31
0.0631
48
0.010
470.3
37A
0.7
From Block E1
489.81
9.75
22
43
42
0.00
0.85
0.00
16.91
12.0
5.0
84.6
478.22
477.58
1 92.46
0.0069
48
0.010
155.8
12.4
7.5
489.27
11.05
43
42.1
42
7.2
478.26
477.37
61.50
0.0145
15
0.010
10.1
8.3
7.5
481.74
3.48
42.1
42
41
0.24
0.74
0.18
17.09
12.1
5.0
85.1
477.36
474.27
151.07
0.0205
48
0.010
267.8
21.3
7.1
488.28
10.92
42
41
40
7.65
0.85
6.50
23.59
12.2
5.0
117.0
474.07
473.52
96.48
0.0057
48
0.010
141.4
11.2
8.6
486.84
12.77
41
40.1
40
0.14
0.80
0.11
0.11
5.0
6.7
0.7
476.75
476.24
26.7
0.0191
15
0.010
11.6
9.5
2.8
483.10
6.35
40.1
40
39
0.12
0.85
0.10
23.80
12.4
4.9
117.5
473.32
469.99
240.26
0.0139
48
0.010
220A
17.5
13.7
483.14
9.82
40
38.2
38.3
0.13
0.85
0.11
0.11
5.0
6.7
0.7
472.36
472.01
29.2
0.0120
15
0.010
9.2
7.5
3.9
479.24
6.88
38.2
38.3
39
7.12
OA
2.85
2.96
25.0
3.5
10.5
471.80
471.54
22.7
0.0115
18
0.010
14.7
8.3
2.7
accounted for at ST41
479.23
7.43
38.3
39
39.1
0.21
0.61
0.13
26.89
12.6
4.9
131.7
469.79
469.19
32.79
0.0183
48
0.010
253.3
202
1.6
479.59
9.80
39
39.1
38
0.16
0.85
0.14
27.02
12.6
4.9
132.3
469.01
465.51
262.48
0.0133
48
1 0.010
2162
17.2
15.3
479.42
10.41
39.1
38
37
0.00
0.85
0.00
27.02
12.9
4.9
131.2
465.31
463.55
115.53
0.0152
48
0.010
231.1
18A
6.3
475.76
10.45
38
37
44
0.00
0.85
0.00
27.02
12.9
4.9
131.2
463.37
460.97
164.40
0.0146
46
0.010
2262
18.0
9.1
473.32
9.95
37
44
45
0.00
0.85
0.00
27.02
13.0
4.8
130.7
460.78
458.91
175.82
0.0106
48
0.010
193.1
15A
11 A
To Interim North SWM
470.71
9.93
44
10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 15+00 15+50 16+00 16+50 17+00 17+50 18+00 18+50 19+00 19+50 20+00
20+00.53
STORM PROFILE
STRUCTURES 46 THROUGH 46.8
2
ADDRESSED COUNTY COMMENTS
JDB
07/08/20
TH OF
o PI
Qb
0 �Z
J
Lie. 267 a
u�,�
1
s`grONAL �'�
�= ENGINEERS
SURVEYORS
PLANNERS
ASSOCIATES
PO Box 4119 968 Olympia Dr, Suite
Lynuhbur,VA24502 ch ]lW ill VA229u
Phone: 434.3166080 Phone434.984.2700
wwww smiatesoet
DESIGNED BY.,
JDB
PROJECT: STONEFIELD BLOCK D-1
VSMP PLAN
ALBEMARLE COUNTY, VIRGINIA
SET REV. NO.
2
DRAWN BY.
JDB
DRAWING NUMBER:
C'_9
TITLE:
STORM SEWER PROFILES & CALCULATIONS
DIHR BY.
HFW
SHEET NUMBER:
9 °f 9
WWA NUMBER:
219040.03
FILE NAME:
904003C-VSMP_SWM-2.
DISCIPLINE:
L
SCALE.
V.- N SHOWN
: N/A
DATE:
021281120
NO.
SHEET REVISION
BY
DATE
N0.
SHEET REVISION
BY
DATE