SW4240401_Plansheet - SCM Detail_20241018 (2)

P 1' Table 12-2 .� � I l t ■ i .�. r , � � � � '�- � � �E�I S I 0N�J'
S aul le Operation and Maintenance Provisions for bioretention Areas
MA I NTENANGE GUIDELINES: in -� 1
- BIORETENTION FACILITIES WILL REOUIRE A REASONABLE AMOUNT OF ROUTINE MAINTENANCE (NOT TOO BMP element: Potential roblems: How toremediate the problem: 28 �
I REV.: 04-02-24,NCDE4 COMMENTS
DIFFERENT FROM CONVENTIONAL LANDSCAPING MAINTENANCE) TO ENSURE THAT THE SYSTEM BOTH The entire BMP Trash debris is resent. Remove the trash debris. / 9 LJ 1FUNCTIONS WELL A5 A 5TORMNATER BMP AND MAINTAINS AN AESTHETIC, ELEMENT COMPATIBLE AITH The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to �� y/ / '/�J//w� I \/ L REV.: D7-3t-24, NCDEo COMMENTS
THE 5URROUNDIN6 LAND USES. bioretention cell erosive gullies have formed. remove the gully,and then plant a II I.T L rr G[ ] /❑� \ ~� 4 REV-: Gg-04-24,NCDE4 COMMENTS
- 131ORETENTION FACILITIE5 SHOULD BE IN5PEGTEP ON A SEMI-ANNUAL 13ASI5 FOR THE FIRST YEAR, AND ground cover and water until it is � r � VV CO I
AFTER MAJOR STORM EVENTS. AFTER THE FIRST YEAR,ANNUAL INSPECTIONS SHOULD SE SUFFICIENT. established, Provide lime and a a ��
- THE FOLL-ON C�ING NER ENI7FI-J FOR MAINTENANCE GUIDEANGE 1S REGOMMOR BIORETENTION SYSTEMS: one time fertilizers lse ofn. L.IJ c
The inlet device: pipe, The pipe is clogged(if Unclog the pipe. Dispose of the �� /�°- � � 18
PLANTING SOIL BED: stone verge or swale applicable), sediment off-site.
- THE SOILS OF THE PLANTING BED SHOULD BE TESTED ON AN ANNUAL BA515 POR pH TO E5TABLI5H The pipe is cracked or Replace the pipe. r f- ! 2[�' SCIVIp�
ACIDIC LEVELS. IF THE pH 15 5ELON 5.2, LIMESTONE SHOULD BE APPLIED- IF THE pH 15 ABOVE otherwise damaged (if
TO TO 8.0, IRON SULFATE PLUS 5ULFUR GAN 8E ADDED TO REDUGE pH.
applicable). .. `-� r
- THE 501L BED MAY EXFIFRIFNGE SOME EROSION,PARTICULARLY AT THE INFLON POINTS, PERIODIG Erasion is occurring in the Regrade the swale if necessary to ° J AXESS, E�.T.
INSPEGTION AND CORRECTION OF EROSION MAY BE NEGESSARY.
- THE 5URFAGE OF THE BED MAY BECOME GLOe6E6 KITH FINE 5EDIMENTS OVER TIME. GORE AERATION Swale (if applicable}. smooth it over and provide erosion /�
OR CULTIVATING OF UNVEfyETATED AREAS MAY BE REQUIRED TO EN5URE ADEQUATE FILTRATION. control devices such as reinforced ' OPEN N Z
�--� � o TW: 976.0 z
/� turf matting or riprap to avoid
NT F ATI NS A 0 RF 0 future problems with erosion. - ' Bw: 74.0
PVC SPACE PROP. Tw: 8.0
EEEMEStone verge is clogged or Remove sediment and clogged ��{� "
- THE VEGETATED FILTER STRIP OR GRASSED CHANNEL SHOULD BE INSPEGTED FOR EROSION RILL OR covered in sediment(if stone and replace with clean stone. EE �� 1 RETAIN WALL W a n
I
6ULLEY5 AND GORR>=GTED A5 NEEDED.BARE AREAS 5HOULD BE SEEDED, OR SODDED, AS NEGE55ARY. Applicable). I �/ � �i �„ CO CO ` V
- THE INFLOA LOGAMON SHOULD BE INSPECTED ANNUALLY FOR GLOGGING. SEDIMENT BUILD-UP IS A BMP element: Potential problems, blow to remediate the problem: / V A LL-�Y / Tw. 976.0
COMMON PROBLEM NITH MANY PRAGTICES WERE RUNOFF LEAVES AN IMPERVIOUS SURFACE AND The pretreatment area Flow is bypassing Regrade if necessary to route all G �/ �/ CC CO r u) gW 973.0
ENTERS A VEGETATIVE OR EARTHEN 5ORFAGF. ANY BUILD-UP SEDIMENT SHOULD BE REMOVED TO pretreatment area and/or flow to the pretreatment area. '
AVOID RUNOFF 13Y-PA551NG THE 1-AGILITY. f
llies have formed. Iiestabilize the area after grading.
- THE OVERFLON 5Tf2UC.TUI2E SHOULD BE IN5F'EGTED ANNUALLY TO ENSURE THAT IT 15 FUNGTIONINO. Sediment has accumulated Search for the source of the v`
ACCUMULATED TRASH AND DEBRIS SHOULD BE REMOVED A5 NECESSARY.
to a depth greater titan three sediment and remedy the problem
inches. if possible. Remove the sediment
and restabilize the pretreatment __Y N G'U^ DID R (� OLtND
TABLE 1.0: MATERIAL SPEC,I F I GATI ONS area. �- F OF IQ- L� f
Erosion has occurred. Provide additional erosion30
PARAMETER SPEGIFIGATION SIZE NOTES protection such as reinforced turf 1
malting or riprap if needed to -_ V
PLANTING SOIL REFER TO NGDF1i STOFUIWATER MANUAL N/A prevent future erosion problems. o a h~ a' J/f \ --� ` Z Q
p
PLANTINGS REFER TO NGDEO STORMWATER MANUAL VARIES N/A
Weeds are present. Remove the weeds,preferably by �1 4
A&ED 6 TO 12 p p hand. g ■ 9�9 . 00MULCH SHREDDED HAIwOV{OOD NIA MONTHS, MINIMUM The bioretentioncell: Best rofessional ractices Prune accordin to best
r
AGED 6 TO 12 vegetation show that pruning is needed professional practices. y -- j 1 Z N
PEA GRAVEL USE GLEAN BANK- to maintain optimal plant /I
health, a r"�1 --... � r � j � V � � �� (ry �
DIAI'HRA6M AND ASTM D 448 SIZE NO. 6 VARIES RUN RIVER PEA Plants are dead,diseased or Determine the source of the �L 001 1 EJ is v
CURTAIN DRAIN (npi�ox.IIb' va") GRAVEL �' a a PROP. r UJ
dying problem: soils,hydrology,disease, '1 Z LU W Z
UNDERDRAI N # � STONE 1/,2 - 2" U5E GLEAN BANK- etc. Remedy the problem and . co C N 881 )786.10 ~� ()T _1
replace plants. Provide a one-time ° ¢ a4 p J RETAINING �
GRAVEL RUN RIVER PEA P P r� --� ,
GRAVEL fertizer application to establish - r� - �- I f WALL E 1 ,6 6 1 ?9 5 4.5 7
the ound cover if a soil test 0- ! ILI Z l�
5/8" PERF. ® b" indicates it is necessary.If sod was �� , f �} -7 rf 1W 0)
{l/G PIPING AA5HTO M-278 6" - RIGID CENTERS, 4 HOLE used,check to see that it was not a -� LA T 36 1,GM-5�/ N O v 2 a
SCH- 40 PFR ROW grown on clay or impermeableco
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soils. Replace sod if necessary. N .4 1 J --- LONG /-_8 ,0 8r 31 .8�9 9» W O °
Tree stakes/wires are present Remove tree stake/wires(which M °
six months after lantin can kill the tree if not removed). Z Z N
° � n � M
TOP s a: .�The bioretention cell. Mulch is breaking down or Spot mulch if there are only FLEV.: 9 .d0 d" (]
soils and mulch has floated away. random void areas. Replace whole � I PIN#b86D-.31-052 lj Z W_
mulch layer if necessary. Remove f { i
l BLOGK 171 LOT 0326 \ LU <(� =_
the remaining much and replace / B1 O C E 17B. 3064, P6. 3366 Z
with triple shredded hard wood I-I- / �� �� '1 Z
mulch at a maximum depth of f�7 #2 ZONING t`'S20 0 0
three inches. f Z
Soils and/or mulch are Determine the extent of the F O
clogged with sediment. clogging-remove and replace -- /_ PROP.
either just the top lavers or the
f
BI ORETENTI ON MEDIA RE(2U I REMENTS entire media as needed.Dispose of I Vr Q 78 I N I G 5 f OVER AR0 N1
the spoil in an appropriate off-site a �_ rJ OR p1L}.- Cft�
THE MEDIA SHALL BE A HOMOGENEOUS SOIL MIX ENGINEERED MEDIA BLEND location. Use triple shredded hard ' 9 7�+ W�L \ LJ L!
WITH APPROXIMATE VOLUMES OF: wood mulch at a maximum depth a V
A) 75 TO 85 PERCENT MEDIUM TO COARSE WASHED SAND (ASTM C33, AASHTO M 6/M80, of three inches.sediment
tand for re ` ��4 f
source(xt the sediment and reined � CO
gHlllttll►
ASTM C330, AASHTO M195, OR THE EQUIVALENT): the problem if ossible. y �. _� I _� ' Co H f _� �- _� `� r� `t��N Ca rU►+++
B) 8 TO 10 PERCENT FINES (SILTAND CLAY): AND BMP element. Potential oblems: How toremedialetlte problem: 4 �� �� co CO �� 'L ...•../'�O�+i
C) 5 TO 10 PERCENT ORGANIC MATTER (SUCH AS PINE BARK FINES). The bioretention cell: Ott annual soil test shows Dolomitic lime shall be applied as a� -� }' PAC CO -�~ ,. o .•�� sslo0
soils and mulch that pH has dropped or recommended per the soil test and 9?� `�-� 9" � QQ 9
- MINIMUM 1 PER HOUR INFILTRATION RATE MUST BE MAINTAINED. T _ r '�
'� (continued heavy metals have toxic sails shall be removed, ` �_ � S�,j I �� �~� _ SEAL
- MEDIA TEST TO BE SUBMITTED TO LOCAL GOVERNING AGENCY FOR STORMWATER accumulated in the soil disposed of properly andxeplaced. �� L� 01 a / 9 `r1 -
AFTER CONSTRUCTION ALONG WITH CERTIFICATION. media, with new plantingmedia. �� �` �' 1 9_�`�4 C� 149$4 s
The underdrain system Clogging has occurred. Wash out the underdrain system.
- MEDIA P-INDEX(PHOSPHORUS) SHALL NOT EXCEED 30 IN NSW WATERS AS if applicable) = 4 7T S �C1
DEFINED IN 15A NCAC 02B .0202 AND SHALL NOT EXCEED 50 ELSEWHERE. The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose _ �- -1 r 1 76,E
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 5� (�/ � � =4� ( � � ~'� \ f 1 0/18/24
- MEDIA SHALL NOT BE PLACED BY MECHANICAL MEANS OR COMPACTED damn have occurred at the Quality 401 Oversight �1/ � /V! \ *�
MECHANICALLY. IT IS RECOMMENDED TO EITHER WATER IT OR WALK ON IT AS outlet 73346. g tea! �`� �� �I'V TE� AO 15T ET PROP. a a G
IT IS PLACED. 456 ' � '� C� p �R�� RETAINING � BARROH DILLOIV -�
-CONTRACTOR SHALL SUBMIT A CERTIFIED COPY OF A SOILS TEST REPORT 96 \ W � �• r}� ) WALL , 24 110 Zr f PIN
�� �, RCP BLOC 5171 LOT 0,3355 /
FOR THE PLANTING SOIL PRIOR TO BIORETENTION AREA CONSTRUCTION Notes: ( oa
MEETING THE MINIMUM PLANTING SOIL SPECIFICATION. The engineer's certification of completion will be required prior to the final plat � �j � I�I��RAI� RCN DB, �B�G.�,�66�
or certificate of occupancy-The stormwater control is to be inspected to ensure it is I'>I� �� v,'� � �y �� � L = 12.`J, W = `J
functioning as designed and has full design volume prior to issuance of the any pJ 1 APRON THICKNESS = 11"
certificate of occupancy. I'i 1�_ 11 /,�1 -/ � - CLASS 1 RIP-RAP � �.b
The property owner(or homeowners association)is responsible for maintaining _\ � /A,yl
the stormwater control(s)according to the approved maintenance plan and direction of ` f
the City of Winston-Salem. W
The City of Winston-Salem and their assigns have right to access the stormwater �� _� ._ o!`' L� PROP. 5 C O I V C
control(s)for inspection or maintenanoe, as necessary. z
SIDEWALK ENDS
/ EX CI Ln�� _ U) �, SAT DDODE )TV I iNIF �4A
A NOTES,- 0
BRICK MASONRY CAN BE ��� ��� �
COMMON CLAY BRICK, JUMBO �
BRICK, OR CONCRETE BRICK. Z
CONCRE (11
2�Rcp BE PAIDTAS ERIICK MASONRY. SCALE 1 = 20BOTTMS SHALL ` ,
ro ALL MORTAR JOINTS ARE (D [n
TO BE 1/2�_& r/au PROP. YARD INLET HH
CONCRETE COVER TO BE PAID THROAT EL.: 975.50 BERMUDA GRASS 50D. - O Z
4X4 PRECAST CONCRETE INV. EL.: 974.00 (3.0' WEIR) �
ENGINEER'S CERTIFICATION Of STORMINATER QUALITY CONTROL 6' PLUG x YARD INLET COVER PROINV. EL.: 974.50 (2 SIDES - 2.0' WEIRS) SOD MUST BE GROWN ON r (� _
ICERTIFYTHAT,PURSUANTTOGENERALLYACCEPTEDENGINEERINGSTANDARDS `O o FOR DEPTHS OVER ACC USE RETANPING �� A PERMEABLE LAYER SAND Know what's below. > Q
IN THE COMMUNITY,IT IS MY PROFESSIONAL OPINION THAT RUNOFF FROM THE s"x s"- STEPS ON 16" CENTERS _ WALLNV. EL.: 969.25 (29) 24 (SAND)
FIRST INCH OF RAINFALL FROM AREAS THAT ARE REQUIRED TO BE CONTROLLED TEE S4NCESWITHLLOCALINGOR LNGR� � p" SIDED: S`I14 S.F.5� INV. EL.: 968.70 PROP. Ca l I before you dig,
BY A PERMANENT ENGINEERED STORMWATER QUALITY CONTROL THAT HAS BEEN AGENCIES 4 R ETA I N I N G J
DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE TOWN OF WALKERTOWN i iu
UNIFIED DEVELOPMENT ORDINANCE WATERSHED PROTECTION,ARTICLE Ill. f'OR PRECAST CONCRETE MODELS Or THIS WALLtu
B La STRUCTURE. THE MANUFACTURER SHALL -
STAMP OR STENCIL ITS LOGO OR NAME
6' A ON lHE INSIDE & OUTSIDE OF THE STRUCTURE ________r_ - RIP-RAP i _ITiII r
PVC,
DEDUCTIONS FOR ONE PIPE
$ FOREBAY PIPE 21 T_
FLOW I 1 f PIPE�'#28
PIPE SIZE C.M. R.C. �� I FLOIIy K k
4=10` 12" 0.020 o.Os2 -_______I _ _ TOP OF BERM ELEV.: 976.00 -•��-� i5"RCP I � 1s"RCP FLOW
10-YR STORM ELEV.: 974.99 I %- - -
15" 0.031 0.047 2-YR STORM ELEV.: 974.47 ----- --- - TOP OF SOD ELEV_ _ 973.00
PLAN 18" a0¢a aos5 :..: ::::::::: ::: ..................: . :: .:. - - - --
1-YR STORM ELEV.: 974.21 _..._.. -. .... _
' Fy:: : :-:. :::.: ::. ::.:_. NON-PERFORATED PIPING TO
IMPERMEABLE GEO-MEMBRANE Z: ',:.[U}i ; - _.::__.:. : _: ::: -A
u TO TOP OF SOD 973.0) -� :AN tf�G;.-_- :-:-:-: - :......:. ..:..: SURFACE WITH CLEANOUTS (TYP)
CONCRETE C01/ER 8' X B"BRICK PIER CONCRETE CODER 8 X 8"9R/CK PIER .. RIP-RAP F O R E BAY
/� *`
I0-G DONS I RUGTI N SEQUENCE, AT EACH CORNER TW0 AT EACH CORNER TWO .. ........:.......... . ..
o COURSES HIGH COURSES HIGH 1 ,0 PONDING STORAGE AREA SOS-
: .
4"WASHEDOP OF SAND 970,50
m t PRE-CONSTRUCTION MEETING WITH EROSION CONTROL INSPECTOR TO GET GRADING PERMIT
M WILL HAVE kPZADY TAKEN PLACE. a --_ a BOTTTOM ELEV. AT SHALLOWEST DRAIN POINT: 969.42 BOTTOM OF SAND 970.17
N 2. THE SITE WILL HAVE BEEN CLEARED AND GRADED WITH EROSION CONTROL DEVICES IN PLACE ONE (1) SIDE ONLY Two (2) SIDES ONLY CLASS I fit P-RAP
N ACCORDING TO THE APPROVED FROSION CONTROL PLAN. OPENING (1) 3.0' OPENING AT 974,00 OPENING (2) 2.0' OPENINGS AT 974.50 BOTTOM ELEV AT DEEPEST DRAIN POINT 968.70
m 3. ALL AREAS OUTSIDE OF THE NEW BUILDING PADSIPRIVATE DRIVE CONSTRUCTKIN SHOULD HAVE THROAT ELEV.: 975.50 THROAT ELEV.: 975.50 GRAVEL BLANKET BOTTOM SLOPE. 0.5% �+ p T
BEEN SEEDED ONCE FINISHED GRADE HAS BEEN ESTABLISHED. SEASONAL HIGH WATER TABLE S'I IW I
�i 4. THE PROPOSED STORM DRAINAGE LINES AT THE BIO-CELL SHOULD BE IN PLACE WITH ASSOCIATED 8" - WEIR ELEV.: 974.50 8 -�� SEASONAL ( ) BELOW 957.00
WEIR ELEV.: 974.Oo PLAN
(#57 STONE)
EROSION CONTROL MEASURES IN PLACE. E -� 2.0' WEIR ��
U 5, NEW CURB&GUTTER,STONE AND PAVEMENT SHOULD BE IN PLACE. _ _ I 3.0' WEIR -' _ _ _ _ I I 0 BI O�GELL 2
2 6, ONCE ALL PRIVATE DRIVES ARE COMPLETE,TEMPORARY DNERSIONDITCHES CAN BEREMOVED I 1- III I ICI{ I_' I III I 6 PVC SCH. 40 UNDERDRAIN @ 0.5 /o SLOPE
TOP 6' PVC ELEV.: 971.501 TOP 6' PVC ELEV.: 971.50 -I I_I FILTER FABRIC DETAIL
AND FILLED IN,MAKING SURE ANY SEDIMENT I5 DISPOSED OF pROPFRLY AND 24" RCP OUTLET PIP E
I' PROP 11,w�KK�� PLAN
7, CONTRACTOR TO REMOVE SKIMMER AND POROUS BAFFLES PRIOR TO CLEANING OUT TEMPORARY 6" 6" RETAINING ��}} p 07 V � DEVELOPER:
SKIMMER BASINS)MAKING SURE THAT ANY SEDIMENT COLLECTED IS REMOVE)AND DISPOSED OF PROPERLY. PVC RCP PVC WALL (J/8" PERFORATIONS @6" O.C., 4 HOLES PER KEYSTONE GROUP,ING
PI 8 CQEMPORARY3KIMMERBABEN(S)INTOP OPOSEDBOCE MANAGEMENT OIVISION PRIOR TOCONVERTING -PLUG z 969.25 - INV 969,2�24° RCP _ ROW) MIN. OF 4 ROWS OF PERFORATION. 37ObALLIANGEDIZiVE 5GALE: AS NOTED
:.-:_-. - - s"x s" , 12" WETLANDS NOTE: SHWT NOTE: 6REEN550PO,NG 2T4OT
N 9. THE CONVERTED SKIMMER BASIN TOB€O-CELL SURFACE AREA AND VOLUME SHALL BEVERIFIED 6"IPVC 6"x 6" TEE 6 I SEASONAL HIGH WATER TABLE REPORT CONTACT: Scott Wallace
TO ENSURE THAT THESE NUMBERS MATCH DESIGN CRITERIA.(CERTIFYAG ENGINEER TO VEWY INVERT ELEV.: 968,70 TEE - INVERT ELEV,: 968.70 PLUG F LOVV I B10-CELL THERE ARE N O WETL.AN DS O N TH I S
1 CLASS I RIP-RAP PROVIDED BY ET ENGINEERING,P.A., PH OW;`( 36J6-0lll DATE:
[� PRIOR TO CONTINUATION) e-d e ' ^-d _d �" :.c'.a ' I SITE ACCORDING TO MICHAEL BRAME NOTES: FAX: (336)36a-133b
C7I 10- INSTALLUNDERDRAlNS,CLEAN-OUTS,FILTER STONE AND c ' 4 ° ' - _ : `� °a4- -a:, a` - 1 JOHNM. RILEY,PE-PRESIDENT
W T „ , WITH PILOT ENVIRONMENTAL, INC. e man: Swallace�gokeystonecam
UJ ON THE APPROVED PLANS. CLASS B CONCRETE, CLASS B CONCRETE - MINIMUM 3 OF # 57 STONE (CLEAN)
j 2500 PSI 2500 PSI , � ' OVER PIPES, NOT NECESSARY UNDERNEATH PIPES EMI PROJECT: 1�88-22
W 11. INSTALL STONE DIAPHRAGM,SOD FILTER STRIP AND SEED REMAINING AREAS AROUND THE Bf0 CELL. SECTION A-A SECTION B-B .
I I
CPT EN6INEERING B 5URVEYIN6,ING.
12. INSTALL PLANTINGS ANp MULCH ACCORDING TO THE APPROVED PLAN. 12" A PRE-CONSTRUCTION MEETING SHALL BE - CLEAN-OUT PIPES TO BE SCH, 40 PVC WITH GLUED 4400TYNINGSTREET DRAINN E3Y: MV
13. INSPECT 1310-CELL TO ENSURE THAT IT IS OPERATING PROPERLY.
14, INSPECT ANDMAINTAINALLEROSIONCONTROLMEASURESFORTHEDURATIONOFCONSTRUCTION. I 11 I it SECTION SCHEDULED ON-SITE WITH CONTRACTOR,
MODIFIED 4 -10 X 4 -10 CLEAN-OUT FITTINGS WITH SCREW TYPE CAPS. HI°tt POINT,NG 212
RIP-RAP BAFFLE DETAIL PHONEGONT 0 b)bU W P. lam,JR. RE.,P.L.S.
N 15, PROVIDE ENGINEER'S CERTIFICATION OF COMPLETION FOR7HEBIO�CELLTOTHECITYOF ENGINEER AND CITY ENGINEER PRIOR TO ANY C PHONE: (336)b12-8800 ext:304 C
..
W#NSTDN-SALEMSTORMWATERDIVISiONFORFINALAPPROVAL, BRICK MASONRY YARD`R INLET - NO FLEXIBLE PIPE ALLOWED.
N.T.S. CONSTRUCTION OF THE B10-RETENTION AREA. FAX (3s6�13I2-aT80 SttEET
ti N.T.S. email: chucktacptengheering.com
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