HomeMy WebLinkAboutWPO201500004 Plan - VSMP WPO VSMP 2015-07-28GENERAL NOTES
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061 A 0- 00- 00- 02900
CATHOLIC DIOCESE OF RICHMOND
7800 CAROUSEL LANE
RICHMOND, VA 2J294
TRAIN f PARTNERS ARCHITECTS
612 E. JEFFERSON STREET
CHARLOTTESVILLE, VA 22902
COLLINS ENGINEERING
200 GARRETT ST. SUITE K,
CHARLOTTESVILLE, VA 22902
TELEPHONE. • (434)293-3719
(434)29J-281 J
CONTACT' MR. SCOTT COLLINS, P.E.
scatt@collins-engineering.com
061AO-00-00-02900 (D.B. 1802/ PG. 311)
17.09 AC.
Aron] 1611,
F 2-k - I
N1 11 Ell 0 L.- 1 0 L -1
ZONING: R-4 RESIDENTIAL (UNDER SPECIAL USE PERMIT SP-98-67)
PRE -APPLICATION C MTG. NOV EMBER 17, 2014
BUILDING HEIGHTS. • MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET PER R-4 DISTRICT
EXISTING ENTRY CUPOLA J6' PER HEIGHT ALLOWANCE PER SECTION 4.10.3.2 CODE)
EXISTING BUILDING AND PROPOSED BUILDING HEIGHTS SHALL NOT EXCEED 35'
MINIMUM BUILDING SETBACKS.•
FRONT SETBACK: 25'
SIDE SETBACK: 15'
REAR SETBACK. 20'
VSMP APPLICATION, WPO�2015�04
EXISTING/PROPOSED USE: EXISTING 40,863 SF K-8TH GRADE SCHOOL BUILDING
PROPOSED 5,968 SF f SCIENCE BUILDING ADDITION
SUBDIVISION STREETS: CURB & GUTTER
WA TERSHED: MEADOW CREEK WATERSHED
TOPO & SURVEY.° TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SURVEYOR COMMONWEALTH LAND
SURVEYING IN NOVEMBER, 2014. NAD 83
FLOODPLAIN: FEMA MAP NO: 5100JCO287D, DATE: 214105
NOTE: THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS.
ADJACENT PROPERTY OWNERS: SEE OVERALL PLAN SHEET 2.
PHASING: SEE OVERALL PLAN AND PHASING PLAN SHEET 2
UTILI TIES.- EXISTING WA TER AND SEWER
STORM WA TER MANAGEMENT.• A PROPOSED LEVEL 1 BIORETENTION BASIN WILL PROVIDE WATER QUALITY TREATMENT
FOR THIS PROPOSED PHASE OF THE DEVELOPMENT. AN EXISTING DOWNSTREAM DETENTION
FACILITY WILL REMAIN AND WILL PROVIDE WATER QUANTITY TREATMENT FOR THIS PORTION OF
THE St TE.
IMPERVIOUS AREAS. • PRE -DEVELOPMENT- 4.51 AC.
POST -DEVELOPMENT 4.56 AC.
NO TE: SEE SHEETS 3-4 FOR STORMWA TER MANAGEMENT DESIGN, DETAILS, & CALCULATIONS
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 occurthe requirements of the permit shall govern.
2. All materials and construction methods shall conform to current specifications and
standards of VDOT unless otherwise noted.
Erosion and silts n measures
3 siltation control m asu es shall be provided in accordance with the approved
erosion control plan and shall be installed priorto 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 :1 or r o h p 3 better are t be achieved.
6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the
County Engineer, or designee, it is deemed necessary in order to stabilize a drainage
channel.
7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic
Control Devices.
8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe - Class III.
g. All excavation for underground pipe installation must comply with OSHA Standards for
the Construction Industry (29 CFR Part 1926).
AI T I LBEMARLE 11
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General Construction Notes for Streets
(This list is in addition to the General Construction Notes)
i. Construction inspection of all proposed roads within the development will be made bythe County. The contractor
must notify the Department of Community Development (296-5832) 48 hours in advance of the start of construction.
2. Upon completion of fine grading and preparation of the roadbed subgrade, the contractor shall have CBR tests
performed on the subgrade soil. Three (3) copies of the test results shall be submitted to the County. If a subgrade soil
CBR of 10 or greater is not obtainable,
a revised pavement design shall be made by the design engineer and submitted with the test results for approval.
3. Surface drainage and pipe discharge must be retained within the public right-of-way or within easements priorto
acceptance by the County. All drainage outfall easements are to be extended to a boundary line or a natural
watercourse.
4. Guardrail locations are approximate. Exact length, location and appropriate end treatments will be field verified at
the time of construction. Additional guardrail may be required at locations not shown when, in the opinion of the
County Engineer, or designee, it is deemed
necessary. When guardrail is required, it shall be installed four (4) feet offset from the edge of pavement to the face of
guardrail, n g , and roadway shoulder widths shall be increased to seven (7) feet.
5. Where urban cross sections are installed, all residential driveway entrances shall conform to VDOT CG-9(A, B or C).
6, Where rural cross sections are installed, all residential driveway entrances shall conform to VDOT standard PE-1.
7. Compliance with the minimum pavement width, shoulder width and ditch sections, as shown on the typical
pavement section detail, shall be strictly adhered to.
8. Road plan approval for subdivisions is subject to final subdivision plat validation. Should the final plat for this project
expire priorto signing and recordation, then approval of these plans shall be null and void.
9. All signs or other regulatory devices shall conform with the Virginia Manual for Uniform Traffic Control Devices and
the Albemarle County Road Naming and Property Numbering Ordinance and Manual.
lo. Traffic control or other regulatory signs or barricades shall be installed by the developer when, in the opinion of the
County Engineer, or designee, they are deemed necessary in order to provide safe and convenient access.
11. The speed limits to be posted on speed limit signs are 5 mph below the design speed, or as determined by VDOT
for public roads.
12. VDOT standard CD-1 or CD-2 cross -drains under to be installed underthe subbase material at all cut and fill
transitions and grade sag points as shown on the road profiles.
13. A video camera inspection is required for all storm sewers and culverts that are deemed inaccessible to VDOT or
County inspections. The video inspection shall be conducted in accordance with VDOT's video camera inspection
procedure and with a VDOT or County inspector present.
SCALE:SHEET LAYOUT
'
SCALE:VICINITY MAP
0
Sheet List Table
Sheet Number
Sheet Title
1
COVER SHEET
2
EXISTING CONDITIONS & DEMOLITION
3
STORMWATER MANAGEMENT PLAN
4
STORMWATER MANAGEMENT LANDSCAPING PLAN
5
EROSION & SEDIMENT CONTROL NOTES & DETAILS
6
EROSION & SEDIMENT CONTROL PLAN
101
on t 0
TOTAL NUMBER OF SHEETS
1. THE LATEST EDITION OF THE ROAD & BRIDGE SPECIFICATIONS, THE ROAD & BRIDGE STANDARDS OF THE
VIRGINIA DEPARTMENT OF TRANSPORTATION SPECIFICATIONS SHALL GOVERN THE MATERIAL AND
CONSTRUCTION METHODS OF THIS PROJECT.
2. WHERE UNSUITABLE MATERIAL IS ENCOUNTERED /N THE ROADWAY, IT SHALL BE REMOVED FROM THE ENTIRE
ROAD RIGHT OF WAY WIDTH AND REPLACED WHERE NECESSARY WITH SUITABLE MATERIAL TO THE
SATISFACTION OF THE ENGINEER.
3. AL L GRO WTH OF TREES AND VEGETA TION SHAL L BE CLEARED AND GRUBBED FOR THE ENTIRE EASEMENT,
OTHER TREES AND VEGETATION WHICH OBSTRUCT SIGHT DISTANCES AT ROAD INTERSECTIONS SHALL BE
REMOVED.
4. ALL VEGETA TION AND OVERBURDEN TO BE REMOVED FROM SHOULDER TO SHOULDER PRIOR TO THE
CONSTRUCTION OF THE SUBGRADE.
I -ID A I A I A r-- C
1.
ALL PIPE CULVERTS, EXCEPT PRIVATEENTRANCES, SHOWN HEREONARE TO BE RCP WITHA MINIMUM COVER OF
ONE (1) FOOT.
2.
STANDARD UNDERDRAINS (CD-1 OR CD-2 OR UD-4'S) TO BE PROVIDED AS INDICATED ON THE PLANS, OR
WHERE FIELD CONDITIONS INDI CA TE.
3.
ALL DRIVEWAYENTRANCE PIPESSHALL BEA MINIMUM OF TWENTY(2o) FEET IN LENGTHAND HAVEA MINIMUM
DIAMETER OFFIFTEEN (15) INCHESAND SHALL BE PLACED INACCORDANCE WITH THE VIRGINIA DEPARTMENT OF
TRANSPORTATION SPECIFICATIONS UNLESS OTHERWISE NOTED ON PLANS.
y..
ALL DRAINAGE EASEMENT SHALL BE CLEARED AND GRADED TO THE SATISFACTION OF THE ENGINEER.
DRAINAGE EASEMENTS SHALL EXTEND TO A POINT DEEMED AS NATURAL WATER COURSE.
LEGEND PA VEMENT
ROADS 1.
ANACTUAL COPY OF THE CBR REPORT IS TO BE SUBMITTED PRIOR TO THE PLACEMENT OF THE AGGREGATE
BASEMATERIAL. IFTHESSV VALUESARELESS THAN1o, THEDEVELOPER WILL BEREQUIRED TO SUBMITFOR
_ --� EXISTING CUL VERT EARTHDITCH
ENGiNEERSAPPROVAL THEPROPOSED METHOD OFCORRECTION.
2.
CULVERT
SUBGRA�DE MUST BEAPPROVE0, BY THE ENGINEER FOR GRADE, TEMPLATEAND COMPACTION BEFORE BASE IS
DRIVEWA Y CUL VERT
DROP INLET& STRUCTURE 3.
PLACED -
TEST REPORTS ON SELECTMAI`cl?IALSMUST BESUBMITTED SHOWING THE MATERIAL MEETS
NO.
BENCHMARK
REQUIRED
GRADATION FOR TYPE 1, II, OR /11 PRIOR TO PLACING AGGREGATE BASE.
- CURB 4.
THE REQUIREMENTS TO PUGMILL AGGREGATE BASE WILL BE WAIVED IN THE EVENT THAT THE SURFACE COURSE
CLEARING LIMITS
CURB &GUTTER
IS BEGINWING AT THE COMPLETION OF THE INSTALLATION OF THEAGGREGATE BASE. IN THE EVENT THAT
55
PROPOSED PAVEMENT VDOT STANDARD STOP SIGN
THE SUR,'FACE COURSE IS APPLIED PRIOR TO 6o DAYS, THE PUGMILL REQUIREMENT WILL APPL Y.
5,
THE USE: OFANAGGREGA TESPREADER IS REQUIRED WHEN PLACING AGGREGATE BASE.
a EC 3A DITCH °° - - -- EXISTING CONTOUR 6.
BASE MUST BE APPROVED BYENGINEER FOR DEPTH, TEMPLATE, AND COMPACTION BEFORE SURFACE
TREATMENT (APPLIED.
6 DEPTH OFEC-3A DITCH PROPOSED CONTOUR 7.
PRIME COAT MUST BEAPPLIED TO BASE MATERIAL PRIOR TO PLACEMENT OFASPHAL T(PRIME COAT RC-250 �7a
0.3 GAL.ISQ. YD.).
EC-2 DITCH 240-55 PROPOSED SPO T EL E VA TION S.
BI TUMINO US SURFA CE TO BEAPPLIED INACCORDANCE WITH CURRENT VIRGINIA DEPARTMENT OF
TBCDENOTES TOPIBACKOFCURB
TRANSPORTATIONSPECIFICATIONS.
6" DEPTH OFEC-2 DITCH T/B DENOTES TOP OF BOX 9.
ENCROACHMENT: POSTS, WALLS, SIGNS, OR SIMILAR ORNAMENTAL STRUCTURES THAT DO NOT ENHANCEA
ROAD WAY'SCAPACITY OR TRAFFIC SAFETY, SHALL NOT BE PERMITTED WITHIN THE RIGHT OF WAY ONLYTHOSE
STRUCTURES SPECIFICALL YAUTHORIZED BYPERMIT ISSUED BY VIRGINIA DEPARTMENT OF TRANSPORTATION
MAYBE LOCATED WITHIN THE STREETS RIGHT OF WAY.
APPROVED
by the Albema le County
Community Dve�lor;ment geaariment
Date
Pile tt }
57 J
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SCOTT R. COLLINS Z
Lic. No. 035791
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Figure S-H_'t. W" P. V.C`_ Ofearrout 0e'tai/
STORMWATER MANAGEMENT NARRATIVE
OVERVIEW
THE PROPOSED PLAN HAS MINOR IMPACTS ON THE PARCEL DUE TO ITS DESIGN APPROACH, WHICH
UTILIZES THE EXISTING IMPERVIOUS ROAD AS ITS ACCESS AND THEREFORE LIMITS THE IMPERVIOUS
FOOTPRINT PROPOSED. WHERE THERE ARE PROPOSED IMPERVIOUS AREAS LAND DISTURBANCE IS
MINIMAL AND A PROPOSED LEVEL 2 BiORETENTION BASIN TREATS ITS RUNOFF.
STORMWATER QUALITY:
THE VIRGINIA RUNOFF REDUCTION METHOD WAS UTILIZED IN THE ANALYSIS OF THIS
DEVELOPMENT TO DETERMINE STORMWATER QUALITY COMPLIANCE. THE RESULTANT
PHOSPHOROUS REMOVAL FROM THE PROPOSED SWM FACILITY EXCEEDS THE MINIMUM
REQUIREMENTS, HEREBY MAKING THIS DEVELOPMENT COMPLIANT WITH COUNTY AND STATE
REQUIREMENTS. THE REQUIRED PHOSPHOROUS REMOVAL IS 1.o2 Ibs/yrAND THE FACILITY
REMOVES 2.34 Ibs/yr. PLEASE SEE THE CALCULATIONS PROVIDED WITH THIS PLAN FOR ADDITIONAL
INFORMATION AND EVIDENCE OF THIS COMPLIANCE.
STORMWATER QUANTITY:
SUBAREA A IS IMPACTED SLIGHTLY FROM THE PROPOSED DEVELOPMENT. HOWEVER THERE IS AN
EXISTING OVERSIZED DETENTION FACILITY DOWNSLOPE OF THE DEVELOPMENT THAT WILL
CONTINUE TO DETAIN THIS SITE's RUNOFF. AN ANALYSIS OF THIS FACILITY's WATERSHED HAS BEEN
PROVIDED PROVING QUANTITY COMPLIANCE. THE FLOWS BEING RELEASED FROM THE FACILITY
FOR THIS WATERSHED ARE LESS THAN THE PRE -DEVELOPMENT FLOWS. PLEASE SEE THE
CALCULATIONS PROVIDED WITH THIS PLAN FOR ADDITIONAL INFORMATION AND EVIDENCE OF
THIS COMPLIANCE.
4' DEEP F
ur/2:2SIDI
PR
3" LAYER OF SHREDDED H/
3' OF STATE APPROVED SOIL R
EXCAVATION NEED
3' MINIMUM P
22" MINIM'
425
DREBAY
SLOPES
20WIDEGRASSUiED
P OP05ED12'WIDE)FOREBAY MERGEOCYSPILLIVAY,CR STELEV.=419.00',
SPILLWAY CREST ELEV. = 19o0' (2l WIDE
I ESTABLISHES A M IMUM IPONDINi�
FOREBAY TOP OF DAM LEV - 420.00) ...._ OF_.z"_-(:01. �l(1DE_-L P_QE_ .AI%ELEV..._
i XISTING TOP 'MULCH DYER 1
4�0 GRADE j ELE% 418.00'I _
: I f i
DEPTH
420.00')
ry 20
OPOSED 3" , CONTRACTOR SHALL
INSTA
GRADE INTERMEDIATE EMBANKME
,RDWOOD MULCH a N ACCORDANCEw/THE
DETA
EDIA. SIDE SLOPE ; - ( SHOWN ON THIS
T.... _ i
-
PLAN.
_..
NOT BE VERTICAL t - _ ,r ��' _ PROPOSED CLE4NOUT,
15 `. - 3T :r _ i SEE DTAIL ON THIS SHE
T 415
:A GRAVEL LAYER (P)
JM GRAVEL SUMP --�
ELE .=
ELE I
(MI .DEPTH) j -412 75
S
11.10 {MI .DEPTH); -� I
- -- --- --
410
6" SICHEDULE 40 SOLI PVC OU, LET '-
1 EXISTING
ETENTION ARE ' I
FCILITY SHALL OU FALL O TO
.MEAN !t1%SE=
`PROPOSED-CL:1, E =2-RIPRAIP
F EXISTING DETENTION AREA I
405 BI ING UTI I IZED FOf PROPOSED !
405
IMPROVEME NTS
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w 0
�
0+50 1+00 1+50 2+00
STORMWATER MANAGEMENT FACILITY GRADING
Area of
Elevation
Forebay Cell
Volume
(ft)
Contours (sf)
(cf)
416
48
0
417
129
85
418
248
271
419
399
591
420
581
1,078
Treatment Volume (Per VRRM Calculations)
Minimum Treatment Volume Required
Minimum Forebay Volume Required (15% of Tv)
Forebay Volume Provided
* Minimum Surface Area Required (Tv/Storage Depth)
Surface Area Provided
Elevation
(fit)
Filter Cell
Contours
(sf)
Volume
(cf)
413.5
1,898
0
414
11898
949
N
415
1,898
2,847
0
416
11898
4,745
417
1,898
6,643
x
418
1,898
8,541
fy'
W v
419
2,273
o
420
2,676
0- N
3,893 cf
3,893 cf
584 cf
1,078 cf
1,806 sf
1,898 sf
* Area based off 3' Mix at 25% porosity, 3" pea gravel at 2% porosity, 12"
stone at 40 porosity & 12" of ponding at 100% porosity
Watershed Summary
Detention
Elevation
Area
Volume
(ft)
Contours (sf)
(cf)
408
1,366
0
410
2,653
3,948
411
3,686
7,104
412
4,768
11,319
Area (ac.)
Tc (hrs.)
1-Year Flow (cfs) 2-Year Flow (cfs) 10-Year Flow (cfs)
DAA(Pre- ReDev)
2.88
0.19
3.28 3.82 8.76
DA A Qualitky (Post-ReDev)
2.40
0.17
( N / A - directed to downstream detention area)
DA A Quanitity (Post-ReDev)
2.88
0.17
0.00 3.39 8.24
rKVrIiLt IVV 1 t7:
1. 6" SCHEDULE 40 PERFORATED PVC UNDERDRAINS, -io' MAXIMUM SPACING WITH CLEANOUTS, SHALL BE INSTALLED
THROUGHOUT THE SWM FACILITY IN THE LOWER STONE LAYER. UNDERDRAINS SHALL BE SLOPED TO DRAIN & DAYLIGHT TO
THE EXISTING DETENTION AREA AND SHALL HAVE A 12" STONE SUMP LOCATED BELOW THE INVERT OF THE UNDERDRAINS.
2. PROPOSED CLEANOUTS SHALL BE INSTALLED IN ACCORDANCE WITH THE DETAIL ON THIS SHEET. THE CLEANOUTS SHALL BE
INSTALLED AT CRITICAL POINTS ALONG THE UNDERDRAIN SYSTEM & AT CHANGES IN DIRECTION OF THE PIPES.
425 425
LL
NT IN PROPOSED 20' WIDE GRASS LIP
EMERGENCY ES L
L SPILLWAY CREST E EV
ES'TABLISHESAMAXIMUM PONDIN,
OF 12" (ie WIDE TOP OF DAM ELEV. :
EXISTING 13' WIDE RIPRAP LINED
SPILLWAY CREST ELEV= 410.5'
(EXISTING TOP OF DAM ELEV-412')
PROPOSED BASIN SPILLWAY SI
BE 4:3.OR FLATTER TO PR
VEHICULAR TRANSITION Al
ROAD & TO PROTECTTHE GRASS
PROFILE SCALES:
1"=5' (V) & 1"=5o' (H)
ED
= 419.00'
iDEPTH-
420.00'}
420
420
!PROPOSED
---- 1 _.. .-_
GRAD
- ---.
20'
415
415
)E SLOPES SHALL"Z�z_
DVIDE A SMOOTH
ONG THE ACCESS
LINED SPILLWAY.
--------
---------------.---
EXISII_N--
GRADE
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410
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BIORETENTluiN ■► A
BIORETENTION BASIN DETAIL (SCALE 1"=3o')
0
WSCOTTR. COLLINS
® F®
L.9 Lic. No. 035791 ,1,
o��sS10NAL
Y
BIORETENTION BASIN CONSTRUCTION NOTES:
FACILITY PLANTING SPECIFICATIONS:
1. ROOT STOCK OF THE PLANT MATERIAL SHALL BE KEPT MOIST DURING TRANSPORT FROM THE SOURCE TO THE JOB SITE AND UNTIL PLANTED.
2. WALLS OF PLANTING PIT SHALL BE DUG SO THAT THEY ARE VERTICAL.
3. THE DIAMETER OF THE PLANTING PIT MUST BE A MINIMUM OF SIX INCHES (6 -) LARGER THAN THE DIAMETER OF THE BALL OF THE TREE.
4. THE PLANTING PIT SHALL BE DEEP ENOUGH TO ALLOW 1/8 OF THE OVERALL DIMENSION OF THE ROOT BALL TO BE ABOVE GRADE. LOOSE SOIL AT THE BOTTOM OF THE PIT SHALL BE TAMPED BY HAND.
5. THE APPROPRIATE AMOUNT OF FERTILIZER IS TO BE PLACE AT THE BOTTOM OF THE PIT (SEE BELOW FOR FERTILIZATION RATES).
6. THE PLANT SHALL BE REMOVED FROM THE CONTAINER AND PLACED IN THE PLANTING PIT BY LIFTING AND CARRYING THE PLANT BY ITS BALL (NEVER LIFT BY BRANCHES OR TRUNK).
7. SET THE PLANT STRAIGHT AND IN THE CENTER OF THE PIT SO THAT APPROXIMATELY 1/8 OF THE DIAMETER OF THE ROOT BALL IS ABOVE THE FINAL GRADE.
8. BACKFILL PLANTING PIT WITH EXISTING SOIL.
9. MAKE SURE PLANT REMAINS STRAIGHT DURING BACKFILLING PROCEDURE.
10. NEVER COVER THE TOP OF THE BALL WITH SOIL. MOUNT SOIL AROUND THE EXPOSED BALL.
11. TREES SHALL BE BRACED BY USING 2' BY T WHITE OAK STAKES, STAKES SHALL BE PLACED PARALLEL TO WALKWAYS AND BUILDINGS. STAKES ARE TO BE EQUALLY SPACED ON THE OUTSIDE OF THE TREE BALL. UTILIZING HOSE AND WIRE THE TREE IS TO BE BRACED BY THE STAKES.
12. BECAUSE OF THE HIGH LEVELS OF NUTRIENTS IN STORMWATER RUNOFF TO BE TREATED, BIORETENTION BASIN PLANTS SHOULD NOT REQUIRE CHEMICAL FERTILIZATION.
CONTRACTOR REQUIREMENTS: (SEEPIANTSCIMDULEFORSPECIFICPLANTSPECIES)
1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS.
2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE
THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS).
3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC
20005.
4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN.
5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION).
6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INFORMATION.
7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES.
8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE BEEN GROWN.
9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL
PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED.
10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED.
11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALLTIMES
BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL.
12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE DESIGNER.
13. MINOR FIELD ADJUSTMENTS MAYBE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT) MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER.
14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN.
15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOT STOCK.
16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE
FOR ONE CALENDAR YEAR.
17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS.
18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR'S CONTROL.
19. THE CONTRACTOR SHALL CONTACT THE WATER RESOURCES INSPECTOR AND COLLINS ENGINEERING 24 HOURS PRIOR TO BACKFILLING THE BIOFILTERS AND REQUEST AN INSPECTION AND APPROVAL OF THE UNDERDRAINS INSTALLATION AND THE SOIL MIX.
20. THE BIOFILTER PLANTING AREAS SHALL BE COVERED WITH HEAVY STRAW MULCH TO A DEPTH OF 3" IMMEDIATELY AFTER PLANTING.
FACILITY CONSTRUCTION
a. BIORETENTION AREAS SHALL BE FULLY PROTECTED BY SILT FENCE OR CONSTRUCTION FENCING, PARTICULARLY IF THEY WILL RELY ON INFILTRATION. IDEALLY, BIORETENTION SHALL REMAIN OUTSIDE THE LIMIT OF DISTURBANCE DURING CONSTRUCTION TO PREVENT SOIL
COMPACTION BY HEAVY EQUIPMENT. BIORETENTION BASIN LOCATIONS MAY BE USED AS SMALL SEDIMENT TRAPS OR BASINS DURING CONSTRUCTION. HOWEVER, THESE MUST BE ACCOMPANIED BY NOTES AND GRAPHIC DETAILS ON THE E&S PLAN SPECIFYING THAT:
A. THE MAXIMUM EXCAVATION DEPTH AT THE CONSTRUCTION STAGE MUST BEAT LEAST a FOOT ABOVE THE POST CONSTRUCTION INSTALLATION, AND
B. THE FACILITY MUST CONTAIN AN UNDERDRAIN. THE PLAN MUST ALSO SHOW THE PROPER PROCEDURES FOR CONVERTING THE TEMPORARY SEDIMENT CONTROL PRACTICE TO A PERMANENT BIORETENTION FACILITY, INCLUDING DEWATERING, CLEANOUT AND
STABILIZATION.
2. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION. IT MAYBE NECESSARY TO BLOCK CERTAIN CURB OR OTHER INLETS WHILE THE BIORETENTION AREA IS BEING
CONSTRUCTED. THE PROPOSED SITE SHALL BE CHECKED FOR EXISTING UTILITIES PRIOR 1-0 ANY EXCAVATION.
3. THE DESIGNER AND THE INSTALLER SHALL HAVE A PRE -CONSTRUCTION MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO THE ORIGINAL DESIGN. BECAUSE THE TIMING OF
THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER. SINCE OTHER CONTRACTORS MAY BE RESPONSIBLE FOR CONSTRUCTING PORTIONS OF THE SITE, IT IS QUITE COMMON TO FIND SUBTLE
DIFFERENCES IN SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT CAN PRODUCE HYDRAULICALLY IMPORTANT DIFFERENCES FOR THE PROPOSED BIORETENTION. THE GENERAL CONTRACTOR SHALL CLEARLY COMMUNICATE, IN WRITING, ANY PROJECT CHANGES
DETERMINED DURING THE PRE -CONSTRUCTION MEETING TO THE INSTALLER AND THE PLAN REVIEW/INSPECTION AUTHORITY.
4. TEMPORARY E&S CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE BIORETENTION AREA TO DIVERT STORMWATER AWAY FROM THE BIORETENTION AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE
NEEDED TO PROTECT VULNERABLE SIDE SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS.
1. ANY PRE-TREATMENT CELLS SHALL BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS.
2. EXCAVATORS OR BACKHOES SHALL WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS. EXCAVATING EQUIPMENT SHALL HAVE SCOOPS WITH ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE
FOOTPRINT OFTHE BIORETENTION AREA. CONTRACTORS SHALL USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO Soo TO a,000 SQ. FT. TEMPORARY CELLS WITH A a0-35 FOOT EARTH BRIDGE IN BETWEEN, SO THAT
CELLS CAN BE EXCAVATED FROM THE SIDE.
3. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 12 INCHES TO PROMOTE GREATER INFILTRATION. THIS REQUIREMENT WILL BE DICTATED BY THE INSPECTOR, PRIOR TO INSTALLATION OF THE REMAINDER OF THE FACILITY.
4. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6-INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE USED, PLACE THE APPROPRIATE DEPTH OF #57 STONE ON THE BOTTOM, INSTALL THE PERFORATED UNDERDRAIN PIPE, PACK
#57 STONE TO 31NCHES ABOVE THE UNDERDRAIN PIPE, AND ADD APPROXIMATELY 31NCHES OF CHOKER STONE/PEA GRAVEL AS A FILTER BETWEEN THE UNDERDRAIN AND THE SOIL MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START WITH 61NCHES OF #57 STONE
ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS DESCRIBEDABOVE.
5. DELIVER THE SOIL MEDIA FROM AN APPROVED VENDOR, AND STORE IT ON AN ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. APPLY THE MEDIA IN 12-INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAIT A FEW DAYS TO
CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TO ACHIEVE THE DESIGN ELEVATION.
6. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALL THE VEGETATION, AND WATER ACCORDINGLY. INSTALL ANYTEMPORARY IRRIGATION.
7. PLACE THE SURFACE COVER IN BOTH CELLS (MULCH, RIVER STONE OR TURF), DEPENDING ON THE DESIGN. IF COIR OR JUTE MATTING WILL BE USED IN LIEU OF MULCH, THE MATTING WILL NEED TO BE INSTALLED PRIOR TO PLANTING (STEP 9), AND HOLES OR SLIMS WILL HAVE
TO BE CUT IN THE MATTING TO INSTALLTHE PLANTS.
8. INSTALLTHE PLANT MATERIALS AS SHOWN IN THE LANDSCAPING PLAN, AND WATER THEM DURING WEEKS OF NO RAIN FOR THE FIRST TWO MONTHS.
g. CONDUCTTHE FINAL CONSTRUCTION INSPECTION (SEE SECTION 9.2). THEN LOG THE CPS COORDINATES FOR EACH BIORETENTION FACILITY AND SUBMIT THEM FOR ENTRY INTO THE LOCAL MAINTENANCE TRACKING DATABASE.
FACILITY MAINTENANCE:
THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION:
1. FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHALL BE INSPECTED BY THE CONTRACTOR AT LEAST TWICE AFTER STORM EVENTS THAT EXCEED 2/2 INCH OF RAINFALL.
2. THE CONTRACTOR SHALL LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA OR AROUND THE BIORETENTION AREA, AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER. CONTRACTOR SHALL SPOT RESEED AS NECESSARY.
3. ONE-TIME, SPOT FERTILIZATION MAY BE NEEDED FOR INITIAL PLANTINGS.
4. WATERING IS NEEDED ONCE A WEEK DURING THE FIRST 2 MONTHS, AND THEN AS NEEDED DURING THE FIRST GROWING SEASON (APRIL-OCTOBER), DEPENDING ON RAINFALL.
5. REMOVE AND REPLACE DEAD PLANTS. SINCE UP TO ao% OF THE PLANT STOCK MAY DIE OFF IN THE FIRST YEAR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE CARE AND REPLACEMENT WARRANTY TO ENSURE THAT VEGETATION IS PROPERLY ESTABLISHED AND
SURVIVES DURING THE FIRST GROWING SEASON FOLLOWING CONSTRUCTION. THE TYPICAL THRESHOLDS BELOW WHICH REPLACEMENT IS REQUIRED ARE 85%SURVIVAL OF PLANT MATERIAL AND t00%SURVIVAL OF TREES.
6. A SPRING MAINTENANCE INSPECTION AND CLEANUP SHALL BE CONDUCTED AT EACH BIORETENTION AREA. THE FOLLOWING IS A LIST OF SOME OF THE KEY MAINTENANCE PROBLEMS TO LOOK FOR:
A. CHECK TO SEE IF 75%TO go%COVER (MULCH PLUS VEGETATIVE COVER) HAS BEEN ACHIEVED IN THE BED, AND MEASURE THE DEPTH OF THE REMAINING MULCH.
B. CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTING INTO THE BED, AND CHECK FOR OTHER SIGNS OF BYPASSING.
C. CHECK FOR ANY WINTER- OR SALT -KILLED VEGETATION, AND REPLACE IT WITH HARDIER SPECIES.
D. NOTE PRESENCE OF ACCUMULATED SAND, SEDIMENTAND TRASH IN THE PRE-TREATMENT CELL OR FILTER BEDS, AND REMOVE IT.
E. INSPECT BIORETENTION SIDE SLOPES AND GRASS FILTER STRIPS FOR EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT.
F. CHECK THE BIORETENTION BED FOR EVIDENCE OF MULCH FLOTATION, EXCESSIVE PONDING, DEAD PLANTS OR CONCENTRATED FLOWS, AND TAKE APPROPRIATE REMEDIAL ACTION.
G. CHECK INFLOW POINTS FOR CLOGGING, AND REMOVE ANY SEDIMENT.
H. LOOK FOR ANY BARE SOIL OR SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND STABILIZE THEM IMMEDIATELY.
I. CHECK FOR CLOGGED OR SLOW -DRAINING SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR OTHER CAUSES OF INSUFFICIENT FILTERING TIME, AND RESTORL PROPER FILTRATION CHARACTERISTICS.
7.
1HE U�VNEK'J ANNUAL LUNU-1LKNI MAIN 1ENANUl' At- 11 V 11 lEJ AV I LK t JIh U"1v 1 KAC. l vx s Kr.�rviv �1a11.t t tr.� n.v v n nr'.�iv
Annual Maintenance ,Activities for Sioretention
l int 60 ii T IIkc
re a cy
e
tohig of grass filler Strips anci 1I01Gfentio7 t LFtocver
At lea5t 4 times a ye-ar
#
Spot Weeding, PrlSlrin repair, trash reiii val, andniuIch raking
Twice duriI"q gromtr0 Seison
•
AcIrJ remfor cen ent planting to niaintain de trrA the, vegetati6.11:.l
d4lensltY
fib. n�= etaI
•
Rem.ove IrI�wJ_asiva plants using re�.orfirne-jideel Control mothod r
•
Stabilize the ountl ibuting Grain age, a iaa to L1ruvoint e€osior1
Spring inspection anJ! c,'e Jriup
SLIPple nerd fl`€I ich to €T E ln.taIII1 _I 3 inch layer
A€''InuaI I'`y`
Prune tree. and '`7h€LII_13
Renlnve sedirnent IIT pre-t€eaitrllent cc-,Ils and i6lflw%e Points
011ce every 2 to 3 yeaar;
Replace the rnulch layer
Every 3 years
.EASE SEE BELOW,
FACILITY INSPECTION:
CONSTRUCTION INSPECTIONS ARE CRITICAL TO ENSURE THE BIORETENTION BASINS ARE PROPERLY CONSTRUCTED AND ESTABLISHED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR
CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENIGINEER AND INSPECTOR, DURING THE FOLLOWING STAGES OF THE BIOFILTER
CONSTRUCTION PROCESS:
a. PRE -CONSTRUCTION MEETING
2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS)
3. EXCAVATION/GRADING (E.G., INTERIM/FINAL ELEVATIONS)
4. BIOHLTER INSTALLATION (E.G., MICROTOPOGRAPHY, SOILAMENDMENTS, STONE BEDDING, UNDERDRAINS AND STAKING OF PLANTING ZONES)
5. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT)
6. HNAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE)
PLEASE ALSO SEE ABOVE, UNDER FACILITY MAINTENANCE #6, FOR REQUIRED INSPECTIONS
R
zt L r Zr Lq
i °apt
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I,
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TYPICAL_
I
igvr , ; Typt-alEleratif of Ri t :rmn Basin b i-e*4911
BIORETENTION BASIN LANDSCAPING DETAIL (SCALES"=30)
PROPERTY LIMITS
511 1111111 i
WD.
SYM
BOTANICAL
COMMON NAME
SIZE
SWM FACILITY
QUANTITY
COVERAGE (sfI
� t f
SC
SCIRPUS CYPERINUS
WOOLGRASS
-
-
75
jC
JUNIPERUS CHINENSIS & CVS.
CHINESE JUNIPER
-
-
750
PIV
PAN ICU M ARGATUM
SWITCHGRASS
-
00
MC
MYRICA CERIFERA
WAX MYRTLE
2-1/2" CAL.
3
-
lG
ILEXGLABRA
INKBERRY
2-1/2" CAL.
9
-
BTU
BETULA NIGRA
RIVER BIRCH
2" CAL.
1
-
AR
ACER RUBRUM
RED MAPLE
2-1/2" CAL,
1
-
US
LIQUIDAMBAR STYRACIFLUA
SWEETGUM
1-1/2" CAL.
2
-
Landscaping General
r • o•
Landscape Specifications:
The following specifications are the minimum standards that are acceptable for the installation of the plant material:
1. The contractor shall be responsible for adhering to the construction sequence outlined on this page for the installation of the
bioretention basin landscaping. The 'Contractor shall also be responsible for locating all existing underground utilities prior to
beginning construction. Any planting conflict arising from existing utility locations shall be brought to the attention of the Owner.
2. The Contractor shall be responsible for providing positive drainage at 2% minimum in all planted areas.
3. The Contractor shall verify plant count from the plan, and shall provide and install all plant materials shown on the approved
plan. The plant schedule provided is for the Contractor's reference only; quantities shall be verified from the approved plan.
4. The Contractor shall guarantee all plant materials for 1 year from the date of planting.
5. The {owner or his designated agent shall approve any changes in plant material.
b. All plant material shall be balled and burlapped or container grown and shall be well formed, vigorous, growing specimens
with growth typical of the variety specified and free from injurious insects and diseases.
7. All trees and shrubs shall be installed as indicated on the approved landscape plan.
Guidelines for Tree Preservation
Preservation measures shall be administered to trees within wooded areas to be maintained within the conservation/preservation
areas delineated, with particular preservation effort directed toward trees with trunk diameters greater than 18 inches at breast
height. All wooded preservation areas adjacent to existing residential development shall be fenced off from construction activity
with portable chain link fencing no closer than the dripline of any tree growing inside the preservation areas. All other wooded
areas to remain shall be fenced off from construction activity with 40 inch high "international orange" plastic web fencing no
closer than the dripline of any tree growing within the designated conservation/preservation area, luring the course of final
grading, if it becomes necessary to fill within the canopy limits of existing trees, such fills shall not exceed depths greater than six
(6) inches to ensure continued saturation of the existing root mat. Prior to grading around the trees, all vegetation shall be stripped
from the fill areas and fertilizer shall be applied. Should it become necessary to cut within the canopy limits, all disturbed roots
shall be protected from exposure to the air. The crown leaf surface shall be proportionately reduced to balance the reduced root
system. The trees shall be fertilized upon completion of grading activities in the area. Any damaged portions of trees within
wooded areas to be maintained shall be immediately addressed to promote expedient recovery.
Further measures for tree protection shall be adhered, as outlined in Chapter 3.38 "Tree Preservation &Protection" of the Virginia
Erosion and Sediment Control Handbook.
General Construction notes for Stormwater Manaaement Plans
a. All dams and constructed fill to be within 95% of maximum dry density and 2% Of
optimum
moisture content. All fill material to be approved by a geotechnical engineer. A
geotechnical engineer is to be present during construction of dams.
2. Pipe and riserjoints are to be watertight within stormwater management facilities
3. Fortemporary sediment traps or basins which are to be converted to permanent
stormwater
management facilities; conversion is not to take place until the site is stabilized, and
permission has been obtained from the County erosion control inspector.
EMBANKMENT NOTES:
AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN
EXAMINATION OF VA DEQAPP'ENDIX A: EARTHEN EMBANKMENT (REQUIREMENTS vs. RECOMMENDATIONS), THE
APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL
STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A
SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR
MEET THESE REQUIREMENTS ,^ATA MINIMUM.
THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH
THE DETAILS SHOWN ON THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE
REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL
CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL.
COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95% OF
MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION
SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE
EMBANKMENTS AND FILL AREAS. THE CONTRACTOR SHALL NOT DISTURB ANY WETLANDS NOT APPROVED TO BE
IMPACTED & SHALL MODIFY THE EXISTING EMBANKMENT AS NECESSARY TO ADHERE TO THESE REQUIREMENTS.
C
NOTES:
1. SET TREE PLUMB PRIOR TO STAKING,
2. ALL PRUNING IS RESTRICTED TO THE REMOVAL OF DEAD
AND BROKEN BRANCHES AND SHALL BE PERFORMED UNDER
BACKFILL TO TERMINATE
THE SUPERVISION OF THE LANDSCAPE ARCHITECT.
AT TOP OUTSIDE LIMITS OF
ROOTBALL + REFER TO TREE
3. DO NOT ALLOW AIR POCKETS TO FORM WHILE BACKFILLING.
ADD MULCH OVERTOP OF STAKING DETAIL
4. IMMEDIATELY SOAK PLANT WITH WATER.
ROOTBALL AND PLANTING PIT
LIMITS, BEGINNING AT NO MORE
5. SEE IRRIGATION PLANS/DETAILS/SPECIFICATIONS AS THEY
RELATE TO THIS INSTALLATION.
THAN 1" DEPTH AT TRUNK AND
TAPERING UP TO A DEPTH OF
3" AT PLANTING PIT LIMITS,
THEN TAPER TO PROPOSED
FINISHED GRADE
1' VAR( S
TYP.
TREE GUYING DETAIL CONSISTS
OF 2 PLANTGPIT SONT 'UPHILL120* '
SIDE
SPECIMEN SHRUB
(AS SPECIFIED ON
DRAWINGS) TRENCH EDGE AROUND
�\
ENTIRE AREA TO BE
MULCHED
':�' R00IBALL
REFER TO TREE
REFER TO TREE
STAKING DETAIL
STAKING DETAIL
COMPACT EXCAVATED SOIL
TO FORM ROOTBALL PIT
GUT AWAY ALL WIRE BASKETS\l fl//\ �,f��f\\ \\\\/ BACKFILL WITH CULTIVATED,
OR�ILOOSE, PLANT
AND/OR NON -BIODEGRADABLE
�- TRENCH EDGE AROUND
ON DOWNHILL SIDE OF 'FREE
4"
XCAVATiONIL
PIT( EXCAVATION IF
ROOTBALL WRAPPING AFTER EXCAVATED MATERIAL IS NOT
ENTIRE AREA TO BE
3:1
MIN.
FINAL TREE PLACEMENT. LOOSE,
TOPS WITH
MULCHED
BURLAP ROOTBALL WRAPPING ABLE
ACCEPTABLE TOPSOIL
TRENCH EDGE AROUND
��\� ENTIRE AREA TO BE
MULCHED
_
III=II II- ;•.;.•.••;;;' 1�II=IIl1
=I I=III ':;':::".4I -IT11
TO BE UNTIED FROM TRUNK MATERIAL. AMEND BACKFILL
AND CUT AWAY TO A POINT PER SPECIFICATIONS. COMPACT
AT LEAST 1l2 DISTANCE DOWN BACKFILL IN LIFTS BY FOOT.
REFER TO ROOTBALL PIT
DETAIL
a
f
�\ \.�`
'II II= "' ' IIiII=_
'IIiI=I1i1 :•:::c::,. ROOTBALL :.III=II II°
THROUGHLY AT 1/2
ROOTBALL. DWATER EPTH.
/ \ \
REFER TO ROOTBALL PIT
\ DETAIL r-
\ y
- -
I41= (III
-
C F A FPLANTPIT
S ARI Y BASE 0
WHEN EXCAVATING PIT: BREAK
�\ `'::' -:: ' '.^';:•: ��\
`'�
•.
/ �\ ='
\,f\
14�lI= =1111
THROUGH AND LOOSEN ALL RETURN AND COMPACT LOOSE
EXCAVATED MATERIAL TO
ROOTBALL :
f i/j .•: i:;1s..� . ��
._ .::.
� � .:: ROOTBALL :'::� �
Il-III=II = _ _ _ _-�1�-1<rI
II=4lrl1-(=II II=IIIiI=III iI-(l II-
HARDPAN (REMOVE A$ PLANT PIT TO ESTABLISHED
NECESSARY TO FAPROPER DEPTH PRIOR TO
/f,/ ���
\/�\ `• �� \
III III= I= = Ii=III=I II=IrII={ 4II~
ll-
DRAINAGE) E
G) PLANT PLACEMENT
\�\\\\\ \\\\�
y%//• ///\/\//\\//ice
4=
NOTES:
REFER TO ROOTBALL PIT
1. NOTIFY LANDSCAPE ARCHITECT OF ANY SITUATION WHERE SOIL CHARACTERISTICS ARE NOT
NOTES:
(NOTES:
DETAIL
AGREEABLE TO THESE PLANTING CRITERIA OR WHERE CONDITIONS RAISE CONCERNS IN
1. SET TREE PLUMB PRIOR TO STAKING.
11. SET TREE PLUMB PRIOR TO STAKING
TERMS OF PLANT SURVIVABILITY OR WARRANTY,
2. CONTRACTOR TO NOTIFY LANDSCAPE ARCHITECT OF ANY PLANT DAMAGE EXPOSED BY,
ALL PRUNING IS RESTRICTED TO THE REMOVAL OF DEAD AND BROKEN BRANCHES AND
2, ALL PRUNING IS RESTRICTED TO THE REMOVAL OF DEAD AND BROKEN BRANCHES AND
OR INCURRED DURING, PLANTING PROCESS,
2. SHALL BE PERFORMED UNDER THE SUPERVISION OF THE LANDSCAPE ARCHITECT.
SHALL BE PERFORMED UNDER THE SUPERVISION OF THE LANDSCAPE ARCHITECT
TREE PLANTING
r2 TREE PLANTING ON SLOPE
r3 SHRUB PLANTING
6`�_ROOTBALL PIT
pa�
12 SECTION N.T.S.
1P SECTION N.T.S.
1i SECTION N.T.S.
12 SECTION N.T.S.
IT 0
loll
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SCOTT R. COLLINS'Z
Lic. No. 035791,l
1
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PRO
TBC
TAB
EROSION CON TROL
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ARING
A
PORARY
PORARY
SOILING
PORARY
EROSION & SEDIMENT CONTROL
TING CUL VERT
STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE
EROSION CONTROL NOTES
VERT
WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL
PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING:
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
P INLET & STRUCTURE NO.
AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND
3.01 SAFETY FENCE.
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF
B
A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE.
AND
THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC.
REGULATIONS VR 62N 0 EROSION AND SEDIMENT CONTROL
B & GUTIER
APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED
UNSAFE BY VIRTUE OF POTENTIAL ,ACCESS BY THE PUBLIC.
REGULATIONS.
POSED PAVEMENT
ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO
3.02 CONSTRUCTION ENTRANCE.
THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE
3A DITCH
A STABILIZED PAVED CONS TRUCTIOtN ENIRA NCE WITH A WASH RACK LOCATED AT POINTS OF
COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO
VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION S17L TO REDUCE THE AMOUNT OF
THE FINAL INSPECTION.
TH OF EC-3A DITCH
MUD 7RANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
ES-J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR
CONSTRUCTION EN7RANCES SHALL ,BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE
TO OR AS THE FIRST STEP IN CLEARING.
2 DITCH
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL
BE MAINTAINED ON THE St TE A T ALL TIMES.
305 SILT FENCE:
ES-5: PRIOR TO COMMENCING LAND DISTURBING ACT7VITIES IN AREAS OTHER THAN
TH OF EC-2 DITCH
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED
INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE
ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN
BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
TH DITCH
SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERA7ONS IN
ORDER TO PREVENT SEDIMENT FROfM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF
SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND
CULVERT
SHEET FLOWS AND LOW-T0-MODERA7F LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS
APPROVAL BY THE PLAN APPROVING AUTHORITY.
SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT
ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL
CH MARK
LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY
EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION &
SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
SEDIMENT CONTROL HANDBOOK (VESCH).
ES-1. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
LIMITS
MEASURES AT ALL 77MES DURING LAND DISTURBING ACTIVITIES AND DURING
3.07 STORM DRAIN INLET PROTECTION.
SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
T STANDARD STOP SIGN
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
ES-8:DURING DEWATER(NG OPERATIONS, WATER WILL BE PUMPED' INTO AN
CURB INLET. TO PREVENT SEDIMENT
INLET OR C T ENT FROM ENTERING STORM DRAINAGE SYSTEMS
APPROVED WATER FILTERING DEVICE.
TING CON TOUR
PRIOR TO PERMANENT STABILIZA770N OF THE DISTURBED AREA. INLET PROTECTION APPLIES
ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES
WHERE STORM DRAIN INLETS ARE ITO BE MADE OPERA77ONAL BEFORE PERMANENT
PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT.
POSED CONTOUR
STABILIZATON OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS
3.09 7EMPORARY DIVERSION DIKE.
OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIA TEL Y.
POSED SPOT ELEVATION
DENOTES TOP/BACK OF CURB
A TEMPORARY RIDGE OF COMPACTED SOIL CONS7RUCTED AT THE TOP OR BASE OF A SLOPING
DISTURBED AREA. TO DIVERT STOIRM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM
DENOTES TOP OF BOX
UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET TO DIVERT
General construction notes for Erosio � and Seth �ient Control Plaits
SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH
AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE
1, The plan aapprovin- authority must be notified tine week prior to the pre -construction
VIRGINIA EROSION & SEDIMENT CONTROL
TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON
€ onferenci line week prior to the c tntrtmticce€;tent of land disturbing acttivity, and one week
[, 0
HANDBOOK SPECIFICATION NUMBER
1 CONSTRUCTION. THE
SITE DURING CONSTR CTI N .SE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18
prior to the final inspection.
*
MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE.
1 All erosion anti sediment control measures will be constructed and ruaaiiutatined. ia�:cordina to
W BAIL BARRIER 3.04
3.12 DIVERSION:�
R
standards and specifications (}f tli" 1+t 17 lilt.<a F, t7S7Ctit and Sedtt " ') naininiuni s it a t !31..rtt � c ntxc t
A CHANNEL CONSTRUCTED ACROSS A SLOPE NTH A SUPPORTING EARTHEN RIDGE ON THE
Handbook and Vir-iai a ReoUlations G'I� 6 5-02-00 Erosion and Sedim nt Control
PORARY DIVERSION DIKE 3.09
LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO /N7FRCEPT AND DIVERT STORMWATER
Reoul ationk.
RUNOFF TO STABILIZED OUTLETS A, T NON -EROSIVE VELOCITIES. APPLIES WHERE RUNOFF FROM
3, All erosion and sediment control measures are to be.. placed prior to or its the first step in
AREAS OF HIGHER ELEVA7ON MAY DAMAGE PROPERTY, CAUSE EROSION, OR IN7ERFERE WITH
clearing.
SEDIMENT TRAP 3.13
THE ESTABLISHMENT OF VEGETAT70IN ON LOWER AREAS, WHERE SURFACE AND/OR SHALLOW
4. A copy of the approved erosion and sediment control plan shall bw maintained on the site at
SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO
alt tunes
MENT BASIN 3.14
BE REDUCED TO MINIMIZE SOIL LOSS.
5, Driest: to citrtl.mencinc, land disturbing activities in areas other than indicated on these tlaits.
€.
3.13 TEMPORARY SEDIMENT TRAP.
(ineltidinl, lint licit hi,nited to, off -site borrowcar waste areas), the contractor shall subirait a
r PROTECTION 3.07
A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG AN EARTHEN EMBANKMENT W/7H A
_ control tan tea e owner `o • review a approval
stllil�letttc,Latary erosion plan the tt t for t La, and app ail b}° tltc plan
STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG
approving authority.
FENCE J. D 5
ENOUGH TO ALLOW 7HE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED
6. The contractor is re tionsibli; for installation of any additional erosion cuintrcil nteaasttres
AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE
necessary try prevent erosion and sedimentation as determined by the plane approving
SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED
authority,
STRUCTION ENTRANCE 3.02
EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE.
7, All dislitub:d areas are. to drain to approved sediment control measures att.t all times during.
3.14 TEMPORARY SED/MENT BASIN:
land disturbin- activities and during site: development until fiilaal statbilar,aatio r is achieved.
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE
8. ltit;artg ill 44'ati'.rLtt salter}att4)iiS. water wall be pumped ifttt? ail alFl7a'CteCl filtering devlec.,
CK DAM 3.20
FORMED BY CONS7RUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAJNAGEWAY.
`). 'line contractor shall i sj,x-<�t all erosion control measures periodically land after each: runoff -
TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE
pr"uducin rainfall event. Any necessary repairs or cleanup to maintain the effectiveness o
LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT APPLIES BELOW
the erosion control devices shall be maade inn-ruediaitely:
FILL DIVERSION 3.10
DISTURBED AREAS WHERE THE TOT O AL CONTRIBUTING DRAINAGE AREA IS EQUAL TO R
Q
�,, approved, i Ir a ed 1? ri �4' areas_
ltk. A�11 fill [itat€et�taal to f a, t.ila�fl fr'iitit an rt Lf]Werl de"4 «t L} ci
E 1
GREA TER 7NAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE
IL All waste materials shall he., taken to Ian tapproved waste area. Earth fill shall lye in: rt
T
TOPOGRAPHY FOR THE CON57RUC7ION OF A . TEMPORARY IMPOUNDMENT.
materials only, fret, of roots, stuttips, Nvood, tt bbish, a d other debris.
RSION 3.12
318 OUTLET PROTECT/ON:
,
1�.. 13crrrc>t�° or a�°ii ate stress -care. to ii€ t•ea°laitiaetl tiitithtrt `T clays t7t cttanilsletic>n per r!ttnirL
S7RUCTURALLY LINED APRONS OR 0774ER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED
Ordinance section 5.1.`?i3
AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT
13. All inert materials shall be transported in compliance with section 13-301 ask the C(Ae of
MANENT SEEDING 3.32
STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE 7HE POTENTIAL
Albemarle.
FOR DOWNS7REAM EROSION BY REDUCING 7H, VELOCITY AND ENERGY OF CONCENTRATED
14. Borrow, fill or waste activity in,vulviag industrial -type power e uipmenit shall be limited to
STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL
the hours of 7:til0 is to 9:00pttt.
3.30
SECTIONS.
15. Boraow', fill c>r waste activity shall be. conducted in ,a sane manner than iittfaint4ainsl�atet;tl
319 R/PRAP:
suip9;ta't: or order to ttiiatamiz' .any hair and to persons, physical datiiad to adjacent land and
VERT INLET PROTECT/ON 3.08
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH
}3 i. t T
iratpa't7� a stir tits and d ins a c tc? arty prttfic trt.t t bs c 'cruse c stada Ink an ssc a trtl tilts; .
FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM 77-IE EROSIVE
16. The deg, elOper shalt reserve. the rtgltt,to install. maintain, remove or con�vet(to permanent
FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE
stormwaater nianao ment facilities where appticible <alt erosion control measures required
T CONTROL 339
ENHANCING THE POTENTIAL FOR /NtFIL TRA7TON, AND TO STABILIZE SLOPES NTH SEEPAGE
by this plan regardless of the sale of any lot, unit, building or other porn ort of the property.
PROBLEMS, AND OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND
/
1.7. 'la=ni�?orary' stabilization Shall be temporary seeding i11rd LtarilC'la1Ii'�. Seeding is (t} be -at 75
7HE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATVE COVER, ETC.;
lbs/acre, and in the months cif Sal tenaber to li'ebruary to consist a 50/50 mix of Annual
p
ARE SUCH THAT THE SOIL MAY ERODE UNDER 77-IE DESIGN FLOW CONDI TONS.
l� y�egrass and 4'ea'e;tl. Winter lye, or in =.°�'laarih sand a�prt"1 to c:t7Lttxist c>1 �,ratnuai live, or �lia;�
SLOPE DRAIN 3.15
3.20 ROCK CHECK DAMS.
through august to consist of Gertii,<ati Millet. Straw mulch is to be: appRed, at �tJIN/1008f.
..
SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO
Alternatives are subject to approved by the. County erosion control inspector,
REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION
18. Permanent stabilization shallbe, lithe and fertilizer, permanent seeding, ,and mutceh.
TABLE 331-A
LIMING REQUIREMENTS
FOR TEA4PORARY SITES
Rec�>riwa,.�Applicllation
pH Te of - ri ltur d L.i;tnestonc
below 4;2 3 ions per acre
4.2 to 52 2 tons per acre
5.,2 to 6 1 tort per ace
ourcc. Va. DSWC
TABLE 3,31-B
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS
-QUICK REFERENCE FOR ALL REGIONS'
Rate
Planting hates
Species
ltis. acre)
Sept. 1 - Feb_ 15
50/50 Mix of
Annual Rye®rass
Uliurn multi-flaruin
50 - I00
Cereal (Winter) ll ye
(Seale cereale)
Feb. 16 - Apr.:10
Annual RveSrass
60 - 100
(Loliu mufti-ftf}wm)
Miay i - Aug 31
Gerinan Millet
50
(Setaria italics)
source: Va. DSwC
THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING 19. Maintenance: All measures are to be inspected weekly and after each rainfall- Any damage
WITH APPROPRIA7E RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND or cckrgging to structural measures is to be repair jimilediately, Silt traps are to be ctc,aued
SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WLL NOT BE BROUGHT TO FINAL when 501,; cif the wet storage volume is filled with sediment. All seeded areas are to be
GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND reseeded when necessary to achieve as good stand of grass. Silt fence and diversion: dykes
RUNOFF TO DOWNS7REAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS which,we colfe titt.o_ sediment tohalf theirtleigh(mus(be cleaned and repaired
EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL
MEASURES CAN BE ESTABLISHED. immediately.
20. All temporary erosion and sediment control'nicasures are to be removed within 30 days of
3.32 PERMANENT STABILIZATION: final site stabilization. when measitres are no lonp;er needed, subbject to approval by the.
THE ESTABLISHMENT OF PERENNIAL, VEGETATIVE COVER ON DISTURBED AREAS BY PLAN77NG County erosion control inspe Ytor.
SEED. TO REDUCE EROSION AND (DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO 21. This plan ;shall be void if the owner does not obtaina. permit within x year of the date of.
PERMANENTLY STABILIZE DISTURBED( AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO approval, (Water Protection Oidivaan€e section 17- 040l )
SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MA7ERIALS TO 22. Permanent vegetation shall be installed on all denuded areas withinnine one `{) months after
IMPROVE WLDL(FE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF i
CONSTRUCTION AC77W77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. the date fled- [artai disturbing activity ecrtatnt tjcrd, (Water Protection Ot'aianaiYee section "17
20713 )
3.35 MULCHING:
APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO
PREVENT EROSION BY PROTECTING THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING
THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETATION BY INCREASING
AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS
WHICH HAVE BEEN PERMANEN7LY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING
SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED
USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS,
OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZATION BY
THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING.
3.37 TREESS, SHRUBS. VINES & GROUND COVERS.•
STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETATIVE COVER WITH TREES, SHRUBS,
VINES, OR GROUND COVERS TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATON OVER
THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE
HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON
STEEP OR ROCKY SLOPES WHERE MOWING 1S NOT FEASIBLE, WHERE ORNAMENTALS ARE
DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR
SOIL CONSERVATION, OR TO ESTABLISH WILDLIFE HABITAT.
3 38 7REE PRESERVA77ON AND PROTECTION:
PR07ECT70N OF DESIRABLE 7REES FROM MECHANICAL OR OTHER INJURY DURING LAND
DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURV/ VAL OF DESIRABLE TREES
WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED
PROTECTION, LANDSCAPE BEAU77FICA770N, DUST AND POLLUTION CONTROL, NOISE REDUCTION,
SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM
FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND
DISTURBING ACTIVITIES.
3.39 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND
CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM
EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY
PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE.
DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE
VESCH.
t� .fir 1_1 V
21B - CULPEPPER FINE SANDY LOAM - 29 TO 77 SLOPES THIS SOIL SERIES
CONSISTS OF VERY DEEP, WELL -DRAINED SOILS ON UPLANDS. RUNOFF
IS MEDIUM & SATURATED HYDRAULIC CONDUCTIVITY IS MODERATELY HIGH
TO HIGH. CULPEPPER LOAM IS USUALLY FOUND ON HItLL SLOPES AND
CONTAIN MODERATE WATER STORAGE IN PROFILE.
21C - CULPEPPER FINE SANDY LOAM - 7q TO 15q SLOPES. THIS SOIL SERIES
CONSISTS OF VERY DEEP, WELL -DRAINED SOILS ON UPLANDS. RUNOFF
IS MEDIUM & SATURATED HYDRAULIC CONDUCTIVITY IS MODERATELY HIGH
TO HIGH. CULPEPPER LOAM IS USUALLY FOUND ON HILL SLOPES AND
CONTAIN MODERATE WATER STORAGE IN PROFILE
39D - HAZEL LOAM - 157. TO 257. SLOPES. THIS SOIL SERIES CONSISTS OF
MODERA TEL Y DEEP, EXCESS! VEL Y DRAINED SOILS HAZEL SOILS HA VE
MEDIUM TO RAPID RUNOFF, MEDIUM TO RAPID INTERNAL DRAINAGE AND
MODERA TEL Y RAPID PERMEABILITY. HAZEL SOILS FOUND ON RIDGETOPS
AND STEEP SIDESLOPES OF THE NORTHERN PIEDMONT PLATEAU.
DESCRIPTION TION OF EROSION & SEDIMENT
EROSION CONTROL NOTES & NARRATIVE
CONTROL MEASURES:-
PURPOSE.
EROSION AND SEDIMENT CONTROL MEASURES:
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO CONSTRUCT A 2-STORY BUILDING ADDITION WITH
IT 1S AN77CIPA7ED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS,
ASSOCIATED PARKING LOT, AND TO PAVE THE EXISTING ACCESS ROAD ASSOCIATED WITH CHARLOTTESVILLE
AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL
CATHOLIC SCHOOL. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 3.60 ACRES
BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE
EXISTING SITE CONDITIONS.'
AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED
THIS SITE CONSISTS OF AN EXISTING SCHOOL AND ASSOCIATED INFRASTRUCTURE THE SITE IS LOCATED TO
AND STORED FOR LA7ER SPREADING. STOCKPILE LOCA77ONS SHALL BE ON S17E AND SHALL BE
THE EAST OF RIO ROAD EAST BETWEEN THE ROAD AND MEADOWCREEK GOLF COURSEIPEN PARK.
STABILIZED WITH A TEMPORARY VEGETATVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR
ADJACENT AREAS.
ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION AC77V777ES HAVE
THIS SITE IS BORDERED TO THE WEST BY RIO ROAD EAST AND TO THE NORTH BY PEN PARK ROAD. TO THE
CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL
SOUTH EXIST RESIDENTIAL LOTS WITH THE MEADOWCREEK GOLF COURSE/PEN PARK TO THE EAST.
BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME
OFFS(TE LAND DISTURBANCE.'
OF YEAR APPLIED.
NO OFFSITE LAND DISTURBANCE 1S PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF
TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT
DISTURBANCE AS SHOWN.
FOR MORE THAN SEVEN DAYS THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING
CRITICAL AREAS'
VEGETATION IMMEDIA 7ELY FOLLOWING GRADING OF 77-IOSE AREAS. SELECT70N OF SEED MIXTURE WILL
THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS.
DEPEND ON THE 77ME OF YEAR APPLIED.
SOILS.'
CONSTRUCTION ENTRANCE:
SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS WITH SOILS DATA INCLUDED WITH THIS
A STABILIZED PAVED CONS TRUCTI0N ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF
NARRA IT VESEQUENCE OF CONSTRUCTION:
VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD
1 NOTIFY ALBEMARLE COUNTY TO SCHEDULE APRE-CONSTRUCTION MEETING AS REQUIRED.
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 77-IE
APPROVAL FROM THE INSPECTOR ON THE PROJECT.
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
J. INSTALL CONSTRUCTION ENTRANCE AND RIGHT-OF-WAY DIVERSION AS SHOWN ON THE PLANS.
SILT FENCE:
CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS
PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR)
AND ATTACHED TO SUPPOR7NG POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL
TRACKING ONTO THE PAVED SURFACE WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE,
AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO
THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED
PREVENT SEDIMENT FROM LEAVING THE S17E TO DECREASE THE VELOCITY OF SHEET FLOWS AND
FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL
LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN
AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER.
SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS
4• INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS
INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN
INCLUDES SILT FENCE, DIVERSION DIKES & SEDIMENT TRAP. MEASURES INTENDED TO TRAP SEDIMENT SHALL
BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE
ACCORDANCE WITH 77-IE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH).
FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE
PERMANENT STABILIZATION:
5. IN ADDITION TO ENSURING THAT THE CONSTRUCTION ENTRANCE IS INSTALLED, INSTALL ANY REMAINING
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED.
EROSION CONTROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN.
TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY
6. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN
STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS,
AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN
AND ALLOWS SELEC770N OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFEEARTHEN
GRADING OPERA RO S G G N STABILIZATION MEASURES SHALL BE APPLIED TO STRUCTURES SUCH AS
HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONS77?UCTION AC77WTIES, ALL
DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER.
7. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE EROSION CONTROL PLAN. SEDIMENT TRAP
TEMPORARY SEEDING.
SHALL REMAIN IN PLACE TO ACCOMMODATE DRAINAGE UNTIL THE SITE IS STABILIZED AND THE STORMWATER
MANAGEMENT FACILITY HAS BEEN INSTALLED. INSTALL STORM SEWER & INLETS AND INSTALL INLET
THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH
PROTECTION AS SHOWN ON THE PLANS
APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDIMENTATION BY
8• PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN
STABILIZING DISTURBED AREAS 77-IAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF
DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION
MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR
SHALL BE APPLIED WITHIN SEVEN DA YS TO DENUDED AREAS THA T MA Y NOT BE A T FINAL GRADE BUT WILL
OFF -SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION
REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS PERMANENT STABILIZATION SHALL BE
UN77L PERMANENT VEGETATON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED.
APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
DUST CONTROL:
9. ONCE ALL GRADING OPERATIONS ASSOCIATED WITH THE ESC PLAN HAVE BEEN COMPLETED, SEDIMENT TRAP
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING DEMOLITION AND
CAN BE CONVERTED TO STORMWATER MANAGEMENT FACILITY. GRADE OUT THE REMAINDER OF THE SITE.
CONS7RUC7ON ACTIVITIES
10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FERTILIZED THE DENUDED AREAS PAVE EXISTING
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE
ACCESS ROAD.
7HE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL7H HAZARDS, TRAFFIC SAFETY
11. INSTALL STONE BASE AND PAVE PARKING LOT.
12. OUNCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE
PROBLEMS OR HARM ANIMAL OR PLANT LIFE.
THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE
DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF
STABILIZED AND THE INSPECTOR GIVES PERMISSION.
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH.
12. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT
TEMPORARY DIVERSION DIKE.
CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADM/NISTRATOR l , N
A RIDGE OF COMPACTED SOIL CONSTRUCTED AT 77-IE TOP OR BASE OF A SLOPING DISTURBED AREA
ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
WHICH DIVERTS OFF -SITE RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET,
13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
-
OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM
FINAL SITE STABILIZA 77ON OR AFTER THE TEMPORARY MEASURES ARE NO O
E E LONGER NEEDED UNLESS
EFFEC77VE LIVE IS 18 MONTHS
OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED
ROCK CHECK DAMS:
SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY
SMALL, 7EMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE
STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION.
VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF 7HE SWALE OR DITCH. LIMITED TO USE
IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS, SHOULD NOT BE USED IN LIVE
STREAMS.
STORM DRAIN INLET PROTECTION:
THE INSTALLATION OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR
CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF 77-IE DISTURBED AREA; LIMITED TO
DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE,
TEMPORARY SEEDING:
CONCENTRATED STORMW
ATER FLOWS'
ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
TEMPORARY SEDIMENT TRAP:
TIME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE
IMMEDIA TEL Y FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED
DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT
AREAS FOR ENOUGH TIME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM
WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
EFFEC77VE LIFE IS 18 MONTHS.
PLANTS SHOULD BE SELEC; ED APPROPRIATE TO THE SEASON AND SITE
TEMPORARY SEDIMENT BASIN:
CONDITIONS FROM TABLES 3.31 B AND 3.31 C. NOTE THAT TABLE 3.3I B PRESENTS
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWATER RELEASE STRUCTURES WHICH IS
PLAINTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE
FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS
CONDITIONS, TABLE 3. 31 C PRESENTS MORE IN-DEPTH INFORMATION ON THE
USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR
PLANT MATERIALS.
ENOUGH TIME TO ALLOW MOST OF 77-IE SUSPENDED SOLIDS TO SETTLE OUT. IT CAN BE
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM
TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED
GERMINATE AND GROW. SEEDBED PREPARATION IS ESSENTIAL.
PROFESSIONAL.
AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY
OUTLET PROTECTION:
FOR TEMPORARY SEEDING. TABLE 3.31 A MA Y BE USED TO DETERMINE THE
THE INSTALLATION OF RIPRAP CHANNEL SEC77ONS AND/OR STILLING BASINS BELOW STORM DRAIN
ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RATES:
OUTLETS TO REDUCE EROSION AND UNDER-CUTTNG FROM SCOURING AT OUTLETS AND TO REDUCE
FLOW VELOCITIES BEFORE STORMW47ER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS
FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1, 000
CULVERT INLET PROTECTION:
SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE
A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT
INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE.
FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES
IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVATIONS AND
ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE.
HAR'DENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
SAFETY FENCE:
OTHER ACCEPTABLE MEANS. TRACKING WITH BULLDOZER CLEATS IS MOST
A PROTEC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
EFFECTIVE ON SANDY SOILS. THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
MEASURE.
OF THE SOIL SURFACE, ESPECIALLY /N CLAYEY SOILS, AND DOES NOT AID
PERMANENT STABILIZATION
PLAINT GROWTH AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING.
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS
SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL,
PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT
CULT/PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO
CONTROL NARRATIVE.
MORE THAN 1� INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS,
AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE
SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND
SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT
LEGUMES SHOULD BE PLANTED FROM 4 INCH TO j DEEP.
STANDARDS THIS SHALL CONSIST OF THE FOLLOWING;
TOPSOIL - 2" DEPTH, LIME - 2 TONS/ACRE,
SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY
FERTILIZER - 600 LBS./ACRE OF 15-30-15
SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC.
3.35, EXCEPT THAT HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED
SEED - ERNST 5311 CONSERVATION SEED MlX - ERNMX- 114 (45
ADEQUATE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS
LBS./ACRE PENNLAWN CREEPING RED FESCUE, 3Z5 LBS/ACRE ARGILS
AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT
KEN TUCK Y BLUEGRASS, 37. 5 LBS/ACRE PARK KEN TUCK Y BLUEGRASS, 15
RILL EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
LBS./ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE PERENNIAL
AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND
MAINTAINED ON A REGULAR BASIS.
MAINTENANCE
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE
CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC
ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS:
A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND
MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT
CONTROL HANDBOOK.
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE
GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND
CLEANED, OR IT WILL BE REPLACED.
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR
UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS
REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT
DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER.
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A
GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND
RESEEDED AS NEEDED.
TH 0
Ole m��t,kN-,
SCOTT R. COLL T_NS'Z
,U Lic. No. 035791,E
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NdTE. CONSTRUCTION C CATION R OU S O C E LIMITS - - --
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ON HOURS o co c c , _ �,. I I � �:. 4 �� C �
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r x, TRAFFIC SHALL BE LIGHT -DUTY. ONLY EIGHT -DUTY CONSTRUCTION TRAFFIC___ r,, bottom of stone weir (ft) 417.25
_ WILL BE ALLOWED DURING STUDENT PACK UP/DROP OFF HOURS. DELIVERIES (— _, • I; ; ,__) -- wet store e ro tc%ed at this eiexratign c� `141,6
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dry storage usi•ed (cY ) (C�7'DA.) 13t3.7 bottom �a dimensions: 21'x65"
NC - VIED AS '
crest of stone weir 419,0 top of damelevation (it) 42i1
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dry store e reavided at this elevation (c I§0X top width of darn (ft 10
PS BY THE E&S INSPECTOR Y _.. 9 P.... Y) )
slope of �i stare e sides 2:1 to trap dimensions 41'x87'
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