SW3220202_Plansheet C504 - SCM Detail_20221101

TOP OF BERM 513.00jk
IRV
100-YR 511.98
50-YR 511.79
SODDED
FINISH GRADE,
SEE
GRADING PLAN
6" PVC CLEANOUT SET 6" ABOVE
SURROUNDING GRADE,
W/SCREWABLE WATERTIGHT CAP
(SEE PLAN FOR LOCATIONS, TYP.)
CLEANED WASHED "CONCRETE"
SAND ASTM C-33
-�� SODDED
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COMPACTED SUBGRADE
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95% STD. PROCTOR
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ASTM D 698
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NON -WOVEN FILTER FABRIC
=I1 '
III='
(MIRAFI 140N OR APPROVED
EQUAL) OVERLAP SEAM 12" MIN.
SEE NOTE 12
CLEAN, WASHED #57 STONE
PROVIDE 3" MIN. ON ALL SIDES OF
UNDERDRAINS
GRADE SUBGRADE OF SAND FILTER
AT 2% TO SUBDRAIN, (TYP.)
SCARIFY SUBGRADE SOIL FOR
INFILTRATION PRIOR TO PLACING
FILTER MEDIA. DO NOT COMPACT TOP
OF SUBGRADE AFTER SCARIFYING
Sand Filter Detail for Pond # I
SUITABLE STRUCTURAL SOIL COMPACTED TO
95% STANDARD PROCTOR; STRUCTURAL FILL
SHALL BE APPROVED, PLACED AND
COMPACTED UNDER THE DIRECT
SUPERVISION OF A GEOTECHNICAL ENGINEER
1ill�,lll I-.
6'
-111
SECTION
Typical Pond Berm K,
OUTSIDE PIPE DIA. +3'
1. 5' 1.5'
SAND FILTER TYPICAL SECTION
N.T.S.
UNDERDRAINS @0.50%, 6" PVC
PERFORATED UNDERDRAIN, SEE
GRADING PLAN AND PLAN VIEW OF
SAND FILTER FOR NUMBER OF
UNDERDRAINS REQUIRED. WRAP
UNDERDRAIN IN FILTERSOCK
0 TOP ELEV. 509.00
1
12" LAYER OF
#57 STONE \ 2,
2 �-
UPSTREAM00
1
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COMPACTED SUBGRADE
EXISTING GRADE, REMOVE 95% STD. PROCTOR
ROOT MATERIAL AND ASTM D 698
ORGANIC MATERIAL SECTION
SEE PLAN FOR PIPE DIA. (TYP.)
1' MIN.
CLASS B
CONCRETE
I' -'il III IiI-11I 111 I11 III I
III TRENCH
BOTTOM
FRONT VIEW 11 SIDE VIEW
EXTEND CONCRETE 12" MINIMUM INTO
UNDISTURBED TRENCH BOTTOM. BEDDING
MATERIAL SHALL NOT BE INSTALLED WHERE
ANTI -SEEP COLLAR IS LOCATED.
NOTES:
1. SUBMIT SHOP DRAWINGS FOR REVIEW AND APPROVAL.
2. CONTRACTOR SHALL PROVIDE SUITABLE FORMING (TO BE REMOVED) TO CONTAIN
CONCRETE FOR PROPER SHAPE AND DIMENSIONS.
3. PLACE ANTI -SEEP COLLARS AT LOCATIONS AND SPACING SHOWN ON SAND FILTER /
DRY DETENTION DETAILS.
5 Anti -Seep Collar
N.T.5.
N.T.S.
4 Forebay Berm
FINISH GRADE
2
1 DOWNSTREAM
00 0
in
CLASS "B" RIP RAP
NON -WOVEN
FILTER FABRIC
SAND FILTER NOTES
1. EXCAVATE THE SAND FILTER TO THE DESIGN DIMENSIONS,
AFTER SEDIMENT BASIN IS NO LONGER REQUIRED.
2. UNDERDRAIN SYSTEMS SHALL BE SCHEDULE 40 PVC
(PERFORATED AND NON -PERFORATED) PIPE MATERIAL.
3. GRAVEL COVER OVER THE UNDERDRAIN SHALL BE AT LEAST 6"
IN DEPTH.
4. GRAVEL BED MATERIALS (STONE) SIZE SHALL NOT BE GREATER
THAN 1/2 TO 1 1/2 INCHES IN DIAMETER (BLUE STONE,
DOUBLE WASHED, #57). DEPTH OF GRAVEL SHALL NOT EXCEED
12 INCHES.
5. FILTER FABRIC MUST MEET A MINIMUM PERMEABILITY RATE OF
75 GALLONS/MINUTE/SQUARE FOOT AND SHALL NOT IMPEDE
THE INFILTRATION RATE OF THE SOIL MEDIUM. NON -WOVEN
FABRIC IS PREFERRED OVER WOVEN AND INSTALLATION
REQUIRES AT LEAST 1 FOOT OVERLAP AT THE ENDS AND
STAKING IN PLACE DURING CONSTRUCTION AT THE TURNED
SURFACES.
6. DRAINAGE AREA TO SAND FILTER TO BE STABILIZED BEFORE
FILTRATION CONTROLS AND FILTER MEDIA ARE INSTALLED.
7. SET UP AN ON -SITE PRE -CONSTRUCTION CONFERENCE WITH
THE DESIGN TEAM AT LEAST 48 HOURS PRIOR TO STARTING
CONSTRUCTION ON ANY SCMS.
8. SOIL COMPACTION TESTS ARE REQUIRED ON ANY BERMS >/=
5FT IN HEIGHT FROM THE NATURAL GRADE. SOIL COMPACTION
MUST BE AT LEAST 95% PROCTOR AND CERTIFIED BY A
LICENSED SOIL ENGINEER.
9. SAND FILTER IS A MINIMUM OF 100' FROM ANY WATER SUPPLY
WELL.
10. THE SEASONAL HIGH WATER TABLE IS A MINIMUM OF 2' BELOW
THE SAND FILTER.
11. BOTTOM OF BMP AND SLOPES DRAINING TOWARD THE SAND
FILTER SHALL BE SODDED.
12. INSTALL TOP LAYER OF NON -WOVEN FILTER FABRIC
IMMEDIATELY UPON BRINGING TOP OF SAND TO GRADE. LEAVE
THE FABRIC INTACT UNTIL THE 1 YEAR WARRANTY PERIOD.
REMOVE FABRIC AND ANY ACCUMULATED SEDIMENT AT THE 1
YEAR WARRANTY DATE.
• - - - - M■■■M ■■■■,
•
CLEANOUT TO BE SET 6"
ABOVE GRADE
CLEANED WASHED "CONCRETE"
SAND ASTM C-33
CLEANOUT CLEANED WASHED #57 STONE
511.25
509.00 12' \
THIS SIDE FACES
1 SIDE ONLY SAND FILTER
2"x2" STEEL
ANGLE WEIR SECTION
FRAME
WELDED TO N.T.S.
SUPPORT 6.-0. SOUARE
zJ IN 12o 0 0 0 0 0 0 0 0
ONO,,_
O O O O O O O O O
IIFROM SAND FILTER
SEE SCHEDULE
FOR INVERTS 6" PERFORATED PVC
PIPE @ 0.50% SLOPE
Outlet Control Structure 6" SOLID PVC SAND
I L FILTER TO STRUCTURE
510
6" PVC /
OUTLET CONTR0.50% MIN.
\ OL 2 �� 513-
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0
p� ANTI -SEEP COLLARS 5 513
SCM ACCESS \ / 50 /
511-
rT�, I EASEMENT (TYP.) \�
5C
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RIP RAP APRON 5 '--I //�/ FES28 c a
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SOD TOP OF J
FOREBAY BERM BERM, INSIDE I
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\ ` ( 50 ) I SLOPE AND I
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Il ~\ _ \ \ I , \\ \ \ 1 \ I\ I GRADE BOTTOM
MI
SAND FILTER
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CONSTRUCT \ o \\
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\ HIGHER THAN
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SETTLEMENT
iewVI
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AS-:UILT SUPV/FYI
AFTER COMPLETION OF CONSTRUCTION OF THE PROJECT, AN ASSUILT SURVEY OF THE STORM DRAINAGE SYSTEM (INCLUDING THE BMP PONDS WITH
OUTLET STRUCTURE INFORMATION) SHALL BE COMPLETED AND SUBMITTED TO THE DESIGNER FOR REVIEW. CONTRACTOR SHALL INCLUDE THIS COST IN
THEIR BID.
DESIGN MODIFICATIONS TO PONDS AS A RESULT OF IMPROPER CONSTRUCTION AND CITY REVIEW WILL BE AT THE EXPENSE OF THE CONTRACTOR.
BASIN CONVERSION:
BASIN SHALL BE USED AS EROSION CONTROL
BASIN DURING CONSTRUCTION. DO NOT
CONVERT EROSION CONTROL BASIN UNTIL ALL OF
THE CONTRIBUTING BASIN IS STABILIZED. PRIOR
TO CONVERSION, EXCAVATE ACCUMULATED
SEDIMENT AND SPREAD ON -SITE. ENSURE POND
IS EXCAVATED TO DESIGN ELEVATIONS AS
SHOWN ON PLAN PRIOR TO PLANTING AND
FINISHING THE BASINS.
\ RIP RAP AF
510
5
C50
10�
ONE YEAR CONTINUED MAINTENANCE AGREEMENT
THE INFORMATION BELOW SHALL BE INCLUDED IN THE CONTRACT BY THE CONTRACTOR AS
REQUIRED IN THE CONTINUED ONE YEAR MAINTENANCE AGREEMENT WITH THE OWNER.
MAINTENANCE INSPECTION REPORTS
AS INDICATED IN THE POST -CONSTRUCTION STORM WATER ORDINANCE, ANNUAL MAINTENANCE
INSPECTION REPORTS SHALL BE SUBMITTED TO THE STORM WATER ADMINISTRATOR. THE FIRST
REPORT SHALL BE SUBMITTED ONE YEAR FOLLOWING THE FINAL APPROVAL DATE OF THE BMP PER
THIS CONTRACT. SUBSEQUENT REPORTS WILL THEN BE THE RESPONSIBILITY OF THE OWNER EACH
YEAR THEREAFTER ON OR BEFORE THE APPROVAL ANNIVERSARY DATE. ALL MAINTENANCE
ACTIVITIES AND INSPECTION REPORTS SHALL BE DOCUMENTED USING THE FORMS CONTAINED IN
THE ADMINISTRATIVE MANUAL. ANNUAL MAINTENANCE INSPECTION REPORTS SHALL BE SEALED BY
A REGISTERED NORTH CAROLINA PROFESSIONAL
ENGINEER OR LANDSCAPE ARCHITECT. THESE INSPECTIONS SHALL BE DISCONTINUED ONLY IF THE
BMPS ARE ACCEPTED FOR MAINTENANCE BY
THE APPLICABLE JURISDICTION.
NOTE: THE MAINTENANCE AGREEMENT SHALL BEGIN UPON FULL ACCEPTANCE OF THE BMP, NOT
NECESSARILY AT SUBSTANTIAL COMPLETION OF THE PROJECT. THE FIRST REPORT BY THE
CONTRACTOR SHALL BE PROVIDED AT THE 11 MONTH IN THE 12 MONTH AGREEMENT.
ROUTINE MAINTENANCE TASKS AND SCHEDULE (PER POND DETAILS AND NOTES INCLUDED IN THIS
SET OF PLANS AND PER SAND FILTER BASIN REQUIREMENTS IN THE STORM WATER BMP MANUAL)
NOTE: WHERE MAINTENANCE IS INDICATED IN THE TABLE AS "YEARLY", THE TASK SHALL BE
PERFORMED AT THE 11 MONTH MARK IN THE 12 MONTH CONTRACT.
10-YR 511.10
2-YR 509.94
1-YR 509.48
NOTE: BLOCK WEIR TO
ELEVATION 510.00
UNTIL FINAL SCM
CONVERSION
10,
TOP OF BERM
ELEV.-513.00
3
�1
COMPACTED SUBGRADE
95% STD. PROCTOR
ASTM D 698
TRASH RACK (SEE DETAIL THIS SHEET)
6.0'x6.0' MASONRY STRUCTURE, 6"
THICK SOLID MASONRY WALL(FILL
CELLS). OPTIONAL PRE -CAST
STRUCTURE IS ALLOWED WITH
SUBMITTAL OF SEALED SHOP DRAWINGS
36" 0-RING RCP W/
ANTI -SEEP COLLARS
INV. OUT=502.00
8" THICK CONC. SLAB
- 6" PERFORATED
PVC @ 0.50% MIN.
(TYP.)
PDE PDE P
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CO 3 14 36d - 34d I 3
1 6" CLEANOUT AT ALL I I
CO 5 I RE(
JUNCTIONS AND ENDS (TYP.) I
STC.
CD
w I
CO I I LIMITS OF SAND
FILTER (DO NOT PLACE I
CO 9 I SOD ON TOP OF
70 SANDFILTER ZONE) I
01
L0
I I �► I I II
LID
II II
I \
imi I I \
I 3 POND BERM KEY \
11 I 50 (DASHED LINE)FUTI \
RECURE PARKS &
UNCONDITIONED I \
STORAGE 5000 S F. \
ICI
/ 1
II t �
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BMP MAINTENANCE
THE BMP LANDSCAPE CONTRACTOR SHALL MAINTAIN THE VEGETATION WITHIN THE SAND FILTER BASIN
UNTIL THE PROJECT IS ACCEPTED BY THE OWNER AND THEN FOR A PERIOD OF ONE YEAR FROM THAT
DATE. CONTRACTOR SHALL ENSURE PLANTINGS ARE ADEQUATELY WATERED AND PROVIDE MEANS OF
WATERING WHEN NECESSARY TO PROMOTE GROWTH. CONTRACTOR SHALL ALSO MAINTAIN INLET AND
OUTLETS OF THE BASIN TO MAKE SURE THEY ARE WORKING PROPERLY AND WATER LEVELS ARE
MAINTAINED. CONTRACTOR SHALL ALSO RE -PLANT ANY AREAS THAT DID NOT ESTABLISH ADEQUATELY.
VEGETATION INCLUDES SOD AREAS, WETLAND PLANTS, AND WETLAND SEEDED AREAS.
SAND FILTER NOTES;
1. EXCAVATE THE SAND FILTER TO THE DESIGN DIMENSIONS, AFTER SEDIMENT
BASIN IS NO LONGER REQUIRED. 6.
AN OBSERVATION/CLEANOUT STANDPIPE MUST BE INSTALLED IN EVERY SAND
FILTER FACILITY THAT HAS A DEPTH GREATER THAN 2 FEET AND/OR AN
SAND FILTER MAINTENANCE CONT.
2. UNDERDRAIN SYSTEMS SHALL BE SCHEDULE 40 PVC (PERFORATED AND
UNDERDRAIN SYSTEM. THE STAND PIPE MUST CONSIST OF A RIGID
NON -PERFORATED) PIPE MATERIAL.
NON -PERFORATED PVC PIPE, 4 TO 6 INCHES IN DIAMETER. IT SHOULD BE
1. MANAGE THE DRAINAGE AREA TO REDUCE THE SEDIMENT LOAD TO THE SAND FILTER.
CAPPED FLUSH WITH THE GROUND ELEVATION OF THE FACILITY. THE TOP OF
2. CLEAN OUT THE SEDIMENTATION CHAMBER OR FOREBAY WHENEVER SEDIMENT DEPTH EXCEEDS SIX
3. GRAVEL COVER OVER THE UNDERDRAIN SHALL BE AT LEAST 6" IN DEPTH.
THE WELL SHALL BE CAPPED WITH A WATERTIGHT CAP.
INCHES.
4. GRAVEL BED MATERIALS (STONE) SIZE SHALL NOT BE GREATER THAN 1/2 TO 7.
DRAINAGE AREA TO SAND FILTER TO BE STABILIZED BEFORE FILTRATION
3. AT LEAST ONCE A YEAR, SKIM THE SAND MEDIA.
1-1/2 INCHES IN DIAMETER (BLUE STONE, DOUBLE WASHED, #57). DEPTH OF
CONTROLS AND FILTER MEDIA ARE INSTALLED.
4. REPLACE THE SAND FILTER MEDIA WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE.
GRAVEL SHALL NOT EXCEED 12 INCHES.
5. INSPECT THE SAND FILTER AT LEAST QUARTERLY. ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED
8.
SET UP AN ON -SITE PRE -CONSTRUCTION CONFERENCE WITH THE DESIGN TEAM
IMMEDIATELY.
5. FILTER FABRIC MUST MEET A MINIMUM PERMEABILITY RATE OF 75
AT LEAST 48 HOURS PRIOR TO STARTING CONSTRUCTION ON ANY BMPS WITH
GALLONS/MINUTE/SQUARE FOOT AND SHALL NOT IMPEDE THE INFILTRATION
LUESA WQ INSPECTOR COREY PRIDDY AT 980-721-9058
RATE OF THE SOIL MEDIUM. NON -WOVEN FABRIC IS PREFERRED OVER WOVEN
MAINTAIN OPERATION AND MAINTENANCE RECORDS IN A KNOWN SET LOCATION. OPERATION AND
AND INSTALLATION REQUIRES AT LEAST 1 FOOT OVERLAP AT THE ENDS AND 9.
SOIL COMPACTION TESTS ARE REQUIRED ON ANY BERMS >/= 5FT IN HEIGHT
MAINTENANCE RECORDS WILL BE AVAILABLE UPON REQUEST.
STAKING IN PLACE DURING CONSTRUCTION AT THE TURNED SURFACES.
FROM THE NATURAL GRADE. SOIL COMPACTION MUST BE AT LEAST 95%
PROCTOR AND CERTIFIED BY A LICENSED SOIL ENGINEER.
REFER TO OPERATIONS AND MAINTENANCE AGREEMENT FOR MORE INFORMATION.
SSMH 6 ,
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adWnrrki+,mrtS
environments life
architecture planning interiors
six coliseum centre
2815 coliseum centre drive
suite 500
charlotte, north carolina 28217
t] 704 379 1919
f] 704 379 1920
www.adwarchitects.com
benesch
Alfred Benesch & Company
2359 Perimeter Pointe Parkway, Suite 350
Charlotte, NC 28208
www.benesch.com
704.521.9880
Corp. NC License: F-1320
Project #17.000405
WAXHAW
TOWN
CAMPUS
4220
WAXHAW MARVI N RD.
WAXHAW, NC 28173
CONSTRUCTION
DOCUMENTS
SCM DETAILS
DATE 5.17.2022
PROJECT NO 20051
REVISIONS
NO DATE DESCRIPTION:
Q 06.13.22 ADDENDUM NO. 02
THIS DRAWING IS THE PROPERTY OF ADW ARCHITECTS, PA. AND
SHALL NOT BE REPRODUCED OR COPIED IN WHOLE OR IN PART. IT
SHALL NOT BE USED ON ANY OTHER PROJECT OR GIVEN TO ANY
OTHER COMPANY OR AGENCY WITHOUT THE CONSENT OF ADW
ARCHITECTS, PA.
OF SI '•..
SEAL
W S
15471
/t
SEAL •••'�j�Y l� i `SN �`��,`
SHEET NUMBER