SW4240401_Plansheet - SCM Detail_20240605 (2)

Table122 r] i �- ` REVISIONS
Sample Operation and Maintenance Provisions for Bioretention AreasCE
1
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- BIORETENTION FAGILITIE5 WILL REQUIRE A REASONABLE AMOUNT OF ROUTINE MAINTENANCE (NOT TOO BMP element: Potentialproblems: How toremedrate theproblem: .---
DIFFERENT FROM CONVENTIONAL LAN05GAPING MAINTENANCE) TO ENSURE THAT THE SYSTEM BOTH The entire BNV 'Trash/debris is present Remove the trash/debris. 29 28 // I
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FUNCTIONS WELL AS A STORMNATER BMP AND MAINTAINS AN AESTHETIC ELEMENT GOMPATIBLE WITH The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to LL] / 127
V
THE SURROUNDING LAND USES, bioretention.cell erosive gullies have formed. remove the gutty,and then plant a > i 26 /❑� _ -
- BIORETENTION FAGILITIE5 SHOULD BE INSPECTED ON A SEMI-ANNUAL BASIS FOR THE FIRST YEAR,AND ground cover and water until it is -
AFTER MAJOR STORM EVENTS. AFTER THE FIRST YEAR,ANNUAL_ INSPECTIONS SHOULD BE SUFFICIENT. established. Provide lime and a
- THE FALLOWING GENERAL. MAINTENANCE GUIDEANGE €5 RECOMMENDED FOR B on time fertilizer aIORETENTION SYSTEMS: lication.
The inlet device: pipe, The Pipe is clogged(if Unclog the pipe. Dispose of the
PLANTI I stone verge or swale applicable). sediment off-site. J
- THE SOILS OF THE PLANTING BED SHOULD BE TESTED ON AN ANNUAL BASIS FOR pH 70 ESTABLISH The pipe is cracked or Replace the pipe.
AGIDIG LEVELS. IF THE pH 15 BELOW 5.2, LIMESTONE SHOULD BE APPLIED, IF THE pH IS ABOVE otherwise damaged rf N
-1.0 TO 8-0, IRON 5ULFATE PLUS SULFUR GAN BE ADDED TO REDUCE pH. g ( a
- THE SOIL BED MAY EXPERIENCE SOME EROSION,PARTICULARLY AT THE INFLOW POINTS,PERIODIC Erosion is occurring in the Regrade the:wale if necessary to 2 ~
INSPEGTION AND GORREGTION OF EROSION MAY BE NECESSARY• g ry U
swale (if applicable). smooth it over and provide erosion
- THE SURFAGE OF THE BED MAY BEGOME CLO60ED WITH FINE 5EDIMENT5 OVER TIME. GORE AERATION D
OR CULTIVATING OF UNVEGETATED AREAS MAY BE REnUIRFD TO ENSURF ADEQUATE FILTRATION. control devices such as reinforced / OPEN
N
1 �A� q 1�I 1� t� i� �wt turf matting or riprap to avoid �" SPACE
r f
PRETREATMENT, I NFLO Y LOC ATI OI 5, AN1/ 2 ERF O1 S future sediment
its with erosion. p U� --^' J P A C C /
Y f-... _#� Stone verge is clogged or Remove sediment and clogged PROP.
- THE VE&ETATEiD FILTER STRIP OR 6RA55ED CHANNEL SHOULD BE IN5PEGTED FOR EROSION RILL OR covered in sediment(if stone and replace with clean stone. EE RETAINING-WALL co c0 c0
GULLEYS AND CORRECTED AS NEEDED. SARF AREAS SHOULD BE SEEDED,OR SODDED,AS NECESSARY. applicable). � ����� 2S 75
- THE INI=L01-V LOCATION SHOULD BE INSPECTED ANNUALLY FOR CLOGGING. SEDIMENT BUILD-UP 15 A PMP element: Potential problems- How toremediate the problem-
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COMMON PROBLEM WITH MANY THENPRACTIGES I^IERE RUNOFF LEAVES AN 1MPERVIDU5 SURFACED T The pretreatment area Flow is bypassing Regrade if necessary to route all ��{�( 1 �� C� \ 'ENTER-5 A VEGETATIVE OR EARTHEN SURFAGE. ANY BUILDUP SEDIMENT SHOULD BE REMOVED TO pretreatment area and/or flow to the pretreatment area. '" """� � _i f
AVOID RUNOFF BY-PA551NG THE FACILITY- / y
tiles have formed. Restabilize the area after adin
- THE OVERFLOW 5TRUGT VRF SHOULD BE INSPECTED ANNUALLY TO ENSURE THAT IT 15 FUNCTIONING, Sediment has accumulated Search far the source of the
ACCUMULATED TRASH AND DEBRIS SH011LD BE REMOVEDAS NECESSARY. to a depth greater than three sediment and remedy the problem
inches. if possible. Remove the sediment r `
and restabilize the pretreatment J N GG
TABLE 1.0: MATERIAL 5PEC IFICATION5 area
Erosion has occurred. Provide additional erasion ��J
�
PARAMETIZ SPEGIFIGATION SIZE NOTES rotection such as reinforced turf
matting or riprap if needed to p a I
PLANTING SOIL REFER TO FfGDE[ STORMWATER MRNJAL N/A resent future erosion problems. / �~ .° .. ' Jm
PLANTINGS REFER TO%DEG1 JGRMHATER MAWAL VARIES N/A Weeds are present. Remove the weeds,preferably by �^
ACTED 6 TO 12 hand. ft I !I F
,\ / `� 1 �.
MULCH SHREDDED HARDJNODD WA MONTHS, MINIMUM The bioretention cell: Best professional practices Prune according to best ° +�� 'o E ■ 979 . 00
f J 11
A6ED 6 TO 12 vegetation show that pruning is needed professional practices. ° a v �� I 7 Lo
to maintain optimal plant ° ( b (�
PEA GRAVEL U5E GLEAN BANK- health °' °' %-4 / �1 r j c� i I _� ly Z m ^
DIAPHRAGM AK) A5TM 0 44b 51ZE NO. 6 VARIE5 RUN RIVER PEA 1 U `� a l 1 �1 m
(APPROX.v8"- u4') Plants are dead,diseased or Determine the source of the � GO
CURTAIN DRAIN GRAVEL dying. problem; soils,hydrology,disease, e° ;) �` PROP. �J >�II t1J Z m
57 STONE I J2 - 2" USE GLEAN BANK- etc. Remedy the problem and f �, w is� `Q 7 8 O `� L� ZD LU
UNT)FRORAIN # RETAINING 1
RUN RIVER PEA replace plants. Provide a one-time ¢ a6 A I J\. --- � �}� � O �
GRAVEL GRAVEL fertilizer application to establish - A I CY) E 1 )6612954,57 z d7 iL
3/8" PERI 6" It
the ground cover if a soil WALL
test ` �`y ALL LN O
indicates it is necessary.If sod was v' o (� t�
PVG PIPING AASHTO M-2T8 6" - RIGID CENTERS, 4 HOLE used,check tn see that it was not ° 27 / LAT 36 1W ���f N
`5GH. 40 PER ROWimpermeable1� ° O U
own on clay or ° � 1. QlX
sails. Replace sad if necessary. a J {� -� f LONG 8 Q eO 8'31 .S 9 9" W Lu z
Tree stakes/wires are present Remove tree stake/w ices(which ° : f I -
six months after land can kill the tree if not removed e o I" 32 `� TvP S I]: 1 `� N��i-SItI�O !/IL c �f I - Q O Z
The biaretention cell: Mulch is breaking down or Spot mulch if there are only j { ELEV.: 9 3.00 Ct' Q a
soils and mulch has floated away. random void areas. Replace whole > I� PIN #686b-31-0512 11-I z C '9
mulch layer if necessary. Remove f i BLOCK 5171 LOT-0326 \ 11 I C) a m
the remaining much and replace F Q B I 0 C E I DB. ,3004, F 6. ,3566 � --, _ ` z_ 2
with triple shredded hard wood S
mulch at a maximum depth of ZONING R.�zO
l' 7`�_ % 2 1 f 7- 0
three inches. �~
Soils and/or mulch are Determine the extent of the
clogged with sediment. clogging-remove and replace f��
either just the top layers or the 4 �� PROP.--VI
entire media as needed.Dispose of / O IC
B I ORETEN.T I ON M, •��D I A REG Q I REMENTS the spoil in an appropriate off-site a __ I A I N i N G
-THE MEDIA SHALL BE HOMOGENEOUS SOIL MIX ENGINEERED MEDIA BLEND location. Use triple shredded hard �7b' WALL I
WITH APPROXIMATE VOLUMES OF: woad mulch at a maximum the depth 97
of three inches.Search far the � `-�. ° _.J A r
A)75 TO 85 PERCENT MEDIUM TO COARSE WASHED SAND (ASTM C33, AASHTO M 61M 80, source of the sediment and remedy a 4 _ CO �1` \
ASTM C330, AASHTO M195, OR THE EQUIVALENT): the problem if possible. ° l HH
-�' � CO -- _ . `tpritutrutrr�i
B) 8 TO 15 PERCENT FINES (SILT AND CLAY): AND BMP element Potentialproblems- How toremediate theproblem; � ° � � CO CO �r►%�1r1 C.q/,�O�i���
C 5 TO 10 PERCENT ORGANIC MATTER SUCH AS PINE BARK FINES). The bioretention cell: An annual soil test shows Dolomitic lime shall be applied as _ B" A CO ����� ' tissr ' �/��•
° ( ) soils and mulch that pH has dropped or recommended per the soil test and 97 �r� ��Q O� Otiq'•���y
- MINIMUM 1 PER HOUR INFILTRATION RATE MUST 8E MAINTAINED. (continued heavy metals have toxic soils shall be removed, ��
MEDIA TEST TO BE SUBMITTED TO CITY OF GREENSBORO STORMWATER AFTER accumulated in the soil disposed of properly and replaced ~ '� L.� _` u� -�`-��� g�-�r� �� SEAL
CONSTRUCTION ALONG WITH CERTIFICATION. media. with new planting media. n�- 74 r �� �n 149$4
The unde-rdrain system Clogging has occurred. Wash out the underdrain system. �77 I / ^ ?'• ��
-MEDIA P-INDEX(PHOSPHORUS) SHALL NOT EXCEED 30 IN NSW WATERS AS if a 1trable � � a a, `~1 6 �� 1
DEFINED IN 15A NCAC 02B ,0202 AND SHALL NOT EXCEED 50 ELSEWHERE, The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose _ �15 =, �- -1 ` a .. Q 9,6
MEDIA SHOULD BE SENT TO NC DEPARTMENT OF AGRICULTURE LAB OR OTHER of the sediment off-site.
REPUTABLE LAB FOR ANALYSIS OF THE P-INDEX. The drop inlet is damaged Repair or replace the drop inlet
The receiving water Erosion or other signs of Contact the NC Division of Water
- MEDIA SHALL NOT BE PLACED BY MECHANICAL MEANS OR COMPACTED damage haveoccuffe at the Quality401 Oversight Unit at919- V� �� �- 1� rt, I Q (� / 12/04/23
MECHANICALLY. IT IS RECOMMENDED TO EITHER WATER IT OR WALK ON IT AS outlet, r^33-x786. sky �� J'v TT E P, a
IT IS PLACED. 456 - - �- N�kE ) AR�V RETAINING �N BARROH DILLON -`
-CONTRACTOR SHALL SUBMIT A CERTIFIED COPY OF A SOILS TEST REPORT �� ` \ pY .� -� �ivi' C WALL � 24 v / PIN�a6.6 21-g4q.3 f ��
FOR THE PLANTING SOIL PRIOR TO BIORETENTION AREA CONSTRUCTION Notes: RCP BLOCK 5171 LOT-033SB /
MEETING THE MINIMUM PLANTING SOIL SPECIFICATION. g p p �) RIP-RAP APRON OB. 4The engineer's s certification of completion will be required prior to the final tat
or certificate of occupancy.The stormwater control is to be inspected to ensure it is ND EX 15' � � _� �� t L - 12.5', W - 5' � -� ZONINC9 R520
functioning as designed and has full design volume prior to issuance of the any T` "� '� APRON THICKNESS - 11' INV.: J�
certificate of occupancy. / 970.77 _ s� CLASS 1 RIP-RA
PP� ��� QC
The property owner(or homeowner's association)is responsible for maintaining � I ! L o
the stormwater control(s)according to the approved maintenance plan and direction of e
the City of Winston-Salem. `� f- �� ~' 1 �� �
-The control(s)for inspection or maintenance,as necessary.City of Winston-Salem and their assigns have right to access the stormwater - Ln PROP. 5 Lr O I V IC. __•"�
n `
SIDEWALK ENDS
A O
E10-cELL #2 " z
�2RCP SCALE 1" = 20' -"
NOTES• � -"
q BRICK MASONRY CAN BE
COMMON CLAY BRICK, JUMBO PROP. YARD INLET HH q�
BRICK, OR CONCRETE BRICK. THROAT EL.: 975.50 -
CONCRETE BOTTOMS SHALL INV EL : 97400 (WEIR) BERMUDA GRASS SOD. Z
s°
ENGINEERS CERTIFICATION OF STORMWATER QUALITY CONTROL FL"G1 BE PAID AS BRICK MASONRY. . . .
SOD MUST BE GROWN ON
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I CFPTIFY THAT,PURSUANT TO GENERALLY ACCEPTED ENGINEERING STANDARDS n ALL MORTAR JOINTS ARE PROP. INV. EL-: 969.25 (29) 24"
IN THE COMMUNITY,IT IS MY PROFESSIONAL OPINION THAT RUNOFF FROM THE I I TO BE 1/2"� 7/8" RETAINING INV. E L.: 966.70 A P E R M EAB L E LAYER (SAND) Know what's below. tt
FIRST INCH OF RAINFALL FROM AREAS THAT ARE REQUIRED TO BE CONTROLLED fi% 6'- CONCRETE COI ER TO BE PAID WALL STRFAGE AREA PROVIDED: &,114 5.F. Call before you dig. K F-
FOR UNDER THE PA Y 1 TEM PROP. y
BY A PERMANENT ENGINEERED STORMWATER QUALITY CONTROL THAT HAS BEEN 4 X4'PRECAST C01VCRE7F -
DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE TOWN OF WALKERTOWN YARD INLET COVER. RETAINING -A
UNIFIED DEVELOPMENT ORDINANCE WATERSHED PROTECTION,ARTICLE ill. °
f6-
FOR DEPTHS OVER 4-O" USE = - WALL 'IIt- In
STEPS ON 16` CENTERS € 1-STEPS SHALL BE IN ACCORD- III-1I I I I I -T -` =A ANCE WI7H LOCAL GOVERNING _____---D-� - III-111-I�I L i i i it 111 I
RIP-RAP
AGENcIEs 1 I, .: $, C_FOREBAY I'lPE#21 I
8 3'-6" E" FLOW I 1' PIPE#28
I ' r
���� TOP OF BERM ELEV.: 976.00 F�W�
4-'IIY ---1-- 10-YR STORM ELEV.: 975.18 f$"RCP ; i la"RCP F
2-YR STORM ELEV: 974.49 ' ---------- - - - - TOP OF SOD ELEV. 973.00
PLAN 11116.1611611
1-YR STORM ELEV.: 974.23 - -
i "? NON-PERFORATED PIPING TO -
: :... .I.i.):_:.::::. ::::..::: :. SURFACE WITH CLEANOUTS (TYP)
g,g I GEOTEXTILE FABRIC :P{ANTNG:.: :
BIO-DELL C�ON5TRQG1ION SEQUENCE: CONCRETE CODER A _ 8'BRICK PIER RIP-RAP FOREBAY
AT EACH CORNER TWO , r':..::'::.:..:..SOkI.
COURSES HIGH 1.0 PONDING STORAGE AREA '.' n [
1. PRE-CONSTRUCTION MEETING WITH EROSION CONTROL INSPECTOR TO GET GRADING PERMIT TOP O F SAND 970- 0
............ ..... ................... .. .
77 ., °
....... .. .
WILL RAVE ALREADY TAKEN PLACE. a --- ; BOTTTOM ELEV. AT SHALLOWEST DRAIN POINT: 969.42 , BOTTOM OF SAND 970,17
2. THE SITEHAVE BEEN CLEARED OVEDE AND GRADED EROSION
EROSION CONTROL DEViCESINPLACE ONE (1) SIDE ONLY CLASS I RI P-RAP 1-4" WASHED SAND BOTTOM ELEV AT DEEPEST DRAIN POINT 96g 70
ACCORDING TO THE APPROVED EROSION CONTROL PLAN. OPENING
N 3. ALL AREAS OUTSIDE OF THE NEW BUILDING PADSIPRIVATE DRIVE CONSTRUCTION SHOULD HAVE THROAT ELEV.: 975.5Q FOR PRECAST CONCRETE MODELS OF THIS _ -
-
BEENSEEDEDONCEF(NISHEOGRADEHASBEEN ESTABLISHED. SrAMPTOR STENCIL ITS LOGO OR NAME GRAVEL BLANKET BOTTOM SLOPE: 0.5%
4. THE PROPOSED STORM DRAINAGELiNESAT THE BIOCELLSHOULDBEIN PLACE WITH ASSOCIATED WEIR ELEV.: 974.QQ ae ON THE INSIDE & OWYOE OF THE STRUCTURE �+ SEASONAL HIGH WATER TABLE (SHWT} BELOW 966.00
EROSION CONTROL MEASURES 1N PLACE. PLAN (#5 7 STONE)
in S. NEW CURB&GUTTER,STONE AND PAVEMENT SHOULD BE IN PLACE: �2,5' 44EIR� i A-711
iv 6. ONCE ALL PRIVATEDRNES ARE COMPLETE,TEMPORARY DNERSiONDITCHES CAN BEREMOVED 1 I I I I EJ III 6" PVC SCH. 40 UNDERDRAIN @ 0.5% SLOPE 3�oTGEL� �2
ci AND FILLED IN,MAKING SURE ANY SEDIMENT IS DISPOSED OF PROPERLY. TOP 6' PVC ELEV.: 971.itl I = OEOUC770NS FOR ONE PIPE „ DETAIL
I i - PROP AND 24 RCP OUTLET PIPE
w 7. CONTRACTOR TO REMOVE SKIMMER AND POROUS BAFFLES PRIOR TO CLEANING OUT TEMPORARY 6° PIPF SIZE C.M. R.C. RETAINING PLAN
O SKIMMERBASIN(S)MAKNNGSURETHATANYSEDIWNTCOLLECTEDISRFMDVFDANDDISPOSEDOFPROPERLY. PVC RCP 12 D.O20 0.032 WALL Tom_ FILTER FABRIC (3/3" PERFORATIONS @6" O.C., 4 HOLES PER OVA 4 D L _
C° B. CONTACT CITY OF WINSTONSALEM STORMWATER MANAGEMENT ptV1SI0N PRIOR TO CONVERTING KEYSTONE GROiJP,INC,
TEMPORARY SKIMMERBASIN(S)INMPROPOSEDBIO-CELL. PLUG 969.25 15" 0.04 0.047 ROW) MIN. OF 4 ROWS OF PERFORATION. 3708ALLIANcEDRIVE SGAL: �� NOTED
B 9. THE CONVERTED SKIMMER BASIN TO BIMELL SURFACE AREA AND VOLUME SHALL BE VERIPED m "-' 18" O.044 0.II65 I 1 6REEN530RO,NC.2-T407
6" PVC 8'x 6"
n I GONTAGT: Scott MIloce
TO ENSURE THAT THESE NWBERS MATCH DESIGN CRITERIA.(CERTIFYING ENGINEER TOVERIFY INVERT ELEV.: 968,70 TEE FLOW I BIO-CELL
ry PRIOR TO CONTINUATION) �.4, d I CLASsIRIP-RAP NOTES: PHON r336) -o1n DATE: 1I-13-23
_ _ __ FAX: (336)36G-1336
r ° ° d° - MINIMUM 3" D F # 57 STONE (CLEAN)
e-malh: *iallaceogokey5tone.cam
10. INSTALL WRDRAINS,CLEAN-0UTS,FILTERSTONEANDSPECUVLSO€LMI7RUREASINDICATED F't20JEGT: I�88-22
w
ON THE APPROVED PLANS. CLASS B CONCRETE
11. INSTALL STONE DIAPHRAGM,SOD FILTER STRIP AND SEED REMAINING AREAS AROUND THEBIO-CELL. 2500PSI I � A PRE-CONSTRUCTION MEETING SHALL BE OVER PIPES NOT NECESSARY UNDERNEATH PIPES. Imo=
12. INSTALL PLANTINGS AND MULCH ACCORDING TO THE APPROVED PLAN. SECTION A'-A ' I SCHEDULED ON-SITE WITH CONTRACTOR, CPT ENGINEERING It 5URVFYiNG,INC,.
00
r` 13, INSPECTBIO•CELLTOENSURETHATITISOPERATINGPRQPERLY. 12' ENGINEER AND CITY ENGINEER PRIOR TO ANY - CLEAN-OUT PIPES TO BE SCH. 40 PVC WITH GLUED 440o TYNiNG srl r PR NN BY. M\/
0 14, INSPECT AND MAINTAIN ALL EROSION CONTROL MEASURES FOR THE DURATION OFCONSMUCTION. MOD���ED /ll�l{'�I! e0 �{I���}!) SECTION CLEAN-OUT FITTINGS WITH SCREW TYPE CAPS. HIGH POINT,NG77265
�J I `f 0 X ""� [J RIP-RAP BAFFLE DETAIL CONSTRUCTION OF THE B10-RETENTION AREA. CONTACT: GHAPLESP.TRUBY,JR. P.E.,P.L.5.
N 15, PROVIDE
INSTCINGINE STOR INATRONpONFOR INANFOROVEBIOCELLTOTHECITYOF BRiGK MA NRY YARD INLET - NO FLEXIBLE PIPE ALLOWED.
WINSTON-SALEM STQRMWATER DIVISION FOR FINAL APPROVAL. PHONE: [phone] eXt:304
m N.T.S. FAX: (336)8I2-bI80 5HEET
M N.T.S.
small: chuckt#rptengtneering.com
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