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PROJECT SUMMARY
CALCULATION DETAILS
• LOADING = HS20/HS25
• APPROX. LINEAR FOOTAGE = 852 LF
STORAGE SUMMARY
• STORAGE VOLUME REQUIRED = 24,000 CF
• PIPE STORAGE VOLUME = 24,090 CF
• BACKFILL STORAGE VOLUME = 0 CF
• TOTAL STORAGE PROVIDED = 24,090 CF
PIPE DETAILS
• DIAMETER = 72"
• CORRUGATION = 5x1
GAGE = 16
• COATING =ALT2
• WALL TYPE = SOLID
• BARREL SPACING = 36"
BACKFILL DETAILS
• WIDTH AT ENDS = 12'
• ABOVE PIPE = 0"
• WIDTH AT SIDES = 12"
• BELOW PIPE = 0"
NOTES
•ALL RISER AND STUB DIMENSIONS ARE TO
CENTERLINE. ALL ELEVATIONS, DIMENSIONS, AND
LOCATIONS OF RISERS AND INLETS, SHALL BE
VERIFIED BY THE ENGINEER OF RECORD PRIOR TO
RELEASING FOR FABRICATION.
-ALL FITTINGS AND REINFORCEMENT COMPLY WITH
ASTM A998.
• ALL RISERS AND STUBS ARE 2%" x Y" CORRUGATION
AND 16 GAGE UNLESS OTHERWISE NOTED.
• RISERS TO BE FIELD TRIMMED TO GRADE.
• QUANTITY OF PIPE SHOWN DOES NOT PROVIDE
EXTRA PIPE FOR CONNECTING THE SYSTEM TO
EXISTING PIPE OR DRAINAGE STRUCTURES. OUR
SYSTEM AS DETAILED PROVIDES NOMINAL INLET
AND/OR OUTLET PIPE STUB FOR CONNECTION TO
EXISTING DRAINAGE FACILITIES. IF ADDITIONAL PIPE
IS NEEDED IT IS THE RESPONSIBILITY OF THE
CONTRACTOR.
• BAND TYPE TO BE DETERMINED UPON FINAL DESIGN.
• THE PROJECT SUMMARY IS REFLECTIVE OF THE
DYODS DESIGN, QUANTITIES ARE APPROX. AND
SHOULD BE VERIFIED UPON FINAL DESIGN AND
APPROVAL. FOR EXAMPLE, TOTAL EXCAVATION DOES
NOT CONSIDER ALL VARIABLES SUCH AS SHORING
AND ONLYACCOUNTS FOR MATERIAL WITHIN THE
ESTIMATED EXCAVATION FOOTPRINT.
• THESE DRAWINGS ARE FOR CONCEPTUAL PURPOSES
AND DO NOT REFLECTANY LOCAL PREFERENCES OR
REGULATIONS. PLEASE CONTACT YOUR LOCAL
CONTECH REP FOR MODIFICATIONS.
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TEMPORARY COVER FOR
CONSTRUCTION LOADS
HEIGHT
OF
COVER
13T-0"
A
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100' MIN
5' MIN
0 4 NTECH°
ENGINEERED SOLUTIONS LLC
www.ContechES.com
9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069
REVISION DESCRIPTION BY 800-338-1122 513-645-7000 513-645-7993 FAX
FINISHED
GRADE
CONSTRUCTION LOADS
FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRAAMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER
THE TOP OF THE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW.
THE USE OF HEAVY CONSTRUCTION EQUIPMENT NECESSITATES GREATER PROTECTION FOR THE PIPE THAN FINISHED
GRADE COVER MINIMUMS FOR NORMAL HIGHWAY TRAFFIC.
PIPE SPAN,
AXLE LOADS (kips)
INCHES
1850 50-75 75-110 110-150
MINIMUM
COVER
(FT)
2.0
2.5
3.0
3.0
12-42
48-72
3.0
3.0
3.5
4.0
78-120
3.0
3.5
4.0
4.0
126-144
3.5
4.0
4.5
4.5
'MINIMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL
COVER REQUIRED TO AVOID DAMAGE TO THE PIPE. MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO
THE TOP OF THE MAINTAINED CONSTRUCTION ROADWAY SURFACE.
CONSTRUCTION LOADING DIAGRAM
SCALE: N.T.S.
SPECIFICATION FOR DESIGNED DETENTION SYSTEM:
SCOPE
PIPE
THIS SPECIFICATION COVERS THE MANUFACTURE AND INSTALLATION OF
THE PIPE SHALL BE MANUFACTURED IN ACCORDANCE TO THE APPLICABLE
THE DESIGNED DETENTION SYSTEM DETAILED IN THE PROJECT PLANS.
REQUIREMENTS LISTED BELOW:
MATERIAL
ALUMINIZED TYPE 2: AASHTO M-36 OR ASTM A-760
THE MATERIAL SHALL CONFORM TO THE APPLICABLE REQUIREMENTS
LISTED BELOW:
GALVANIZED: AASHTO M-36 OR ASTM A-760
ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE
ARM111A691ECOATED: AASHTO M-245 OR ASTM A-762
REQUIREMENTS OF AASHTO M-274 OR ASTM A-92.
ALUMINUM: AASHTO M-196 OR ASTM B-745
THE GALVANIZED STEEL COILS SHALL CONFORM TO THE
APPLICABLE
REQUIREMENTS OF AASHTO M-218 OR ASTM A-929.
HANDLING AND ASSEMBLY
SHALL BE IN ACCORDANCE WITH NCSP'S (NATIONAL CORRUGATED STEEL
THE POLYMER COATED STEEL COILS SHALL CONFORM TO THE
ARROCASSDCIATION) FOR ALUMINIZED TYPE 2, GALVANIZED OR POLYMER
REQUIREMENTS OF AASHTO M-246 OR ASTM A-742.
COATED STEEL. SHALL BE IN ACCORDANCE WITH THE MANUFACTURER'S
RECOMMENDATIONS FOR ALUMINUM PIPE.
THE ALUMINUM COILS SHALL CONFORM TO THE APPLICABLE
REQUIREMENTS
OFAASHTO M-197 ORASTM B-744.
INSTALLATION
SHALL BE IN ACCORDANCE WITH AASHTO STANDARD SPECIFICATIONS FOR
CONSTRUCTION LOADS
HIGHWAY BRIDGES, SECTION 26, DIVISION II DIVISION II ORASTM A-798 (FOR
CONSTRUCTION LOADS MAY BE HIGHER THAN FINAL LOADS. FOLLOW THE
ALUMINIZED TYPE 2, GALVANIZED OR POLYMER COATED STEEL) OR ASTM
MANUFACTURER'S OR NCSPA GUIDELINES.
B-788 (FOR ALUMINUM PIPE) AND IN CONFORMANCE WITH THE PROJECT
PLANS AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR
CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE WITH THE
SITE ENGINEER.
NOTE:
THESE DRAWINGS ARE FOR CONCEPTUAL
IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO FOLLOW OSHA
PURPOSES AND DO NOT REFLECT ANY LOCAL
GUIDELINES FOR SAFE PRACTICES.
PREFERENCES OR REGULATIONS. PLEASE
CONTACT YOUR LOCAL CONTECH REP FOR
MODIFICATIONS.
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REVISION DESCRIPTION
ASSEMBLY
SCALE: 1" = 20'
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CMP DETENTION SYSTEMS
CONTECH
DYODS
DRAWING
DY058320 TESLA RENTON
Plan A
Seattle, WA
DETENTION SYSTEM
A
ACCESS CASTING TO BE
PROVIDED AND INSTALLED
BY CONTRACTOR.
7� N
4
0
cD °
4
d
GASKET MATERIAL 0 CMP RISER
SUFFICIENT TO PREVENT a -,
SLAB FROM BEARING ON to
RISER TO BE PROVIDED BY OB 11"TYP N
CONTRACTOR.
SECTION VIEW
#4 DIAGONAL TRIM
BAR (TYR 4 PLACES),
SEE NOTE 7.
OPENING IN
PROTECTION_
SLAB FOR
CASTING
INTERRUPTED BAR
REPLACEMENT, SEE
NOTE 6.
#4 DIAGONAL TRIA
BAR (TYP. 4 PLACES;
SEE NOTE 7
2" COVER
(TYP)
OPENING II
PROTECTIOI
SLAB FOI
CASTINI
IECT No.:
SEO. No.:
DATE:
41120
58320
82812024
MED:
DRAWN:
DYO
Dvo
:KED:
APPROVED:
Dvo
DYO
T NO.:
1
REINFORCING TABLE
"BEARING
CMP
A 0 B REINFORCING PRESSURE
RISER
(PSF)
24"
0 4'
26"
#5 @ 12" OCEW
2,410
4,X4,
#5 @ 12" OCEW
1,780
30"
0 4'-6"
32
#5 @ 12" OCEW
2,120
4'-6" X 4'-6"
#5 @ 12" OCEW
1,530
36"
05, 5'
#5 @ 10' OCEW
1,890
X 5'
#5 @ 10' OCEW
1,350
42
0 5'-6" 5'-W
44'
#5 @ 10' OCEW
1,720
X 51-6"
#5 @ 9" OCEW
1,210
48"
0 6' 6'
#5 @ 9^ OCEW
1,600
XB'
#5@8"OCEW
1,100
"ASSUMED SOIL BEARING CAPACITY
A
STANDARD STANDARD7�7
REINFORCING, REINFORCING,
OB INTERRUPTED BAR
SEE TABLE SEE TABLE
REPLACEMENT,
SEE NOTE 6.
ROUND OPTION PLAN VIEW
SQUARE OPTION PLAN VIEW
NOTES:
1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION.
7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND
BARS A MINIMUM OF 12" BEYOND OPENING, BEND
2. DESIGN LOAD HS25.
BARS AS REQUIRED TO MAINTAIN BAR COVER.
3. EARTH COVER = V MAX.
8. PROTECTION SLAB AND ALL MATERIALS TO BE
PROVIDED AND INSTALLED BY CONTRACTOR.
4. CONCRETE STRENGTH = 3,500 psi
9. DETAIL DESIGN BY DELTA ENGINEERING, BINGHAMTON, NY.
5. REINFORCING STEEL = ASTM A615, GRADE 60.
6. PROVIDE ADDITIONAL REINFORCING AROUND
MANHOLE CAP DETAIL
OPENINGS EQUAL TO THE BARS INTERRUPTED,
HALF EACH SIDE. ADDITIONAL BARS TO BE IN
SCALE: N.T.S.
THE SAME PLANE.
Cemu/ ° A��I%�ITCAIJ°
21I NTECH -- o. v:I&_�
ENGINEERED SOLUTIONS LLC CMP DETENTION SYSTEMS
DY058320 TESLA RENTON
Plan A
PROJECT No.:
"'�°
DESIGNED:
DYG
CHECKED:
DYO
www.ContechES.com
CONTECH
9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069 DYODS
8DO338-1122 513-645-7000 513-645-7993 FAX DRAWING
Seattle, WA
DETENTION SYSTEM
SHEET NO.:
0
58320 8/282024
DRAWN:
Dvo
APPRoveO:
DVO
1
lal
NO. REVISION
J
TABLE 1:
DIAMETER, D
MIN.
COVER
CORR.
PROFILE
6"-10"
12"
1 1 /2" x 1 /4"
12"-48"
12"
2 2/3" x 1 /2"
>48"-96"
12"
3" x 1", 5" x 1"
>96"
D/8
W x 1", 5" x 1"
• STRUCTURAL BACKFILL MUST EXTEND TO
LIMITS OF THE TABLE
• TOTAL HEIGHT OF COMPACTED COVER FOR
CONVENTIONAL HIGHWAY LOADS IS MEASURED
FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE
PAVEMENT OR TOP OF RIGID PAVEMENT
• ULTRAFLO ALSO AVAILABLE FOR SIZES 18" - 120'
WITH 3/4"x 3/4"x 7 1/2" CORRUGATION
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TABLE 2, SOLID STANDARD
7
VA VA�VA/AA/AA/AA/A
V��\/�A/�A//VA
2
` IN GEOGRAPHIES WITH //j//j//j�
INSTALLATION NOTES
\\\\\\
SALTING. SEE /AA%AA%AAA
INSTALLATION NOTE 4 j\\j\\j\\j\
1. WHEN PLACING THE FIRST LIFTS OF BACKFILL IT IS
6 VA VA
VA//VA//V/XV//
IMPORTANT TO MAKE SURE THAT THE BACKFILL IS PROPERLY
COMPACTED UNDER AND AROUND THE PIPE HAUNCHES.
2. OTHER ALTERNATE BACKFILL MATERIAL MAY BE ALLOWED
DEPENDING ON SITE SPECIFIC CONDITIONS, AS APPROVED BY
= w
58 \\ij\\ij\
/ N SITU %
SITE ENGINEER.
5- 0 LU
C)
\\\\\
CMp O \\�/\\�/\\�/j//
3. BACKFILL USING CONTROLLED LOW -STRENGTH MATERIAL
"FLASH FILL" OR "PLOWABLE FILL") MAY BE USED WHEN
o n
z
/�/,�/,�//
j\
(CLSM,
THE SPACING BETWEEN THE PIPES WILL NOT ALLOW FOR
w
> LU
O m
B
\\j\y\y
'\\'/\\'/\\'
HAUNCH /\\j\\j\\
'/\\'/\\'/\\'/
PLACEMENT AND ADEQUATE COMPACTION OF THE BACKFILL.
O O rWn
ZONE \/\/\/
CONTACT CONTECH FOR FURTHER EVALUATION.
LL
4. IF SALTING AGENTS FOR SNOW AND ICE REMOVALARE USED
ON OR NEAR THE PROJECT, A GEOMEMBRANE BARRIER
ABOVE DETAIL A
RE T
OMM NDED OVER THE UPPER HALF OF THEPIPE. THE
RECOMMENDATION.
GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE
FROMTIAL ADVERSECTS THAT MAY
HHAN TE
A`/ %%// GEOTECHNICAL EOR OR PROJECT
2
RESULT M A NN THE
SPECIFIC BACKFILL R
VAjAAjAAjAAAjAAjAAjAAj/AAjAAj,AAjAA/AAj/AAj/AAjAAj/AAAj/AAj/AAjAAjAAjAAjAAjAAjAAjAAAJAAjA�jAAjAA EQUIREMENTS.
ENVIRONMENT OVERAPERIODOFTIME.PLEASEREFERTO
THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE
TRENCH
FILL ENVELOPE - - EMBANKMENT
FOR ADDITIONAL INFORMATION.
MINIMUM WIDTH DEPENDS ON SITE CONDITIONS AND ENGINEERING JUDGEMENT
CMP DETENTION AND CMP DRAINAGE STANDARD BACKFILL SPECIFICATIONS
MATERIAL LOCATION MATERIAL SPECIFICATION DESCRIPTION
MINIMUM TRENCH WIDTH MUSTALLOW ROOM FOR PROPER COMPACTION OF MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE:
HAUNCH MATERIALS UNDER THE PIPE. PIPE < 24": 3.OD
FILL ENVELOPE WIDTH PER ENGINEER OF RECORD THE SUGGESTED MINIMUM TRENCH WIDTH, OR FOR RECOMMENDATION: PIPE 24" - 144": D +4'0"
PIPE<12":D+16"
PIPE > 144": D + 10'0"
PIPE > 12": 1.5D + 12^
PRIOR TO PLACING THE BEDDING, THE FOUNDATION MUST BE CONSTRUCTED TO A UNIFORM AND STABLE GRADE. IN THE EVENT THAT UNSUITABLE
FOUNDATION
AASHTO 26.5.2 OR PER ENGINEER OF RECORD
FOUNDATION MATERIALS ARE ENCOUNTERED DURING EXCAVATION, THEY SHALL BE REMOVED AND FOUNDATION BROUGHT BACK TO GRADE WITH A FILL
MATERIAL APPROVED BY THE ENGINEER OF RECORD.
AASHTO M 43: 3, 357, 4, 467, 5, 56, 57
ENGINEER OF RECORD TO DETERMINE IF BEDDING IS REQUIRED. PIPE MAY BE PLACED ON THE TRENCH BOTTOM OF A RELATIVELY LOOSE, NATIVE SUITABLE
BEDDING
(APPROVED REGIONAL EQUIVALENTS INCLUDE CA-7)
WELL GRADED GRANULAR MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, 2" MIN DEPTH. THE BEDDING MATERIAL MAY BE SUITABLE
FOUNDATION SOILS CONFORMING TO AASHTO SOIL CLASSIFICATIONS Al, A2, OR A3 WITH MAXIMUM PARTICLE SIZE OF 3" PERAASHTO 26.3.8.1
CORRUGATED METAL PIPE
HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION WITHOUT SOFT SPOTS.
BACKFILL SHALL BE PLACED IN 8" +/- LOOSE LIFTS AND COMPACTED TO 90 % STANDARD PROCTOR PER AASHTO T 99. BACKFILL SHALL BE PLACED SUCH THAT
CRITICAL BACKFILL
AASHTO M 145: A-1, A-2, A-3 *
THERE IS NO MORE THAN ATHREE LIFT (24") DIFFERENTIAL BETWEEN ANY OF THE PIPES ATANY TIME DURING THE BACKFILL PROCESS. THE BACKFILL
SHOULD BE ADVANCED ALONG THE LENGTH OF THE SYSTEM TO AVOID DIFFERENTIAL LOADING. WELL
GRADED GRANULAR MATERIAL WHICH MAY CONTAIN SMALL AMOUNTS OF SILT OR CLAYAND MAXIMUM PARTICLE SIZE OF 3" (PER AASHTO 26.3.8.1 AND
12.4-1.3).
BACKFILL
AASHTO M 145: A-1, A-2, A-3
COVER MATERIAL
UP TO MIN. COVER - SEE 5AAND 5B ABOVE
COVER MATERIAL MAY INCLUDE NON -BITUMINOUS, GRANULAR ROAD BASE MATERIAL WITHIN MIN COVER LIMITS
ABOVE MIN. COVER - PER ENGINEER OF RECORD
RIGID OR FLEXIBLE PAVEMENT (IF
PER ENGINEER OF RECORD
FLEXIBLE PAVEMENT SHOULD NOT BE COUNTED AS PART OF THE FILL HEIGHT OVER THE CMP. FINAL BACKFILL MATERIAL SELECTION AND COMPACTION
APPLICABLE)
REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER THE ENGINEER OF RECORD.
OPTIONAL SIDE GEOTEXTILE
NONE
GEOTEXTILE LAYER IS RECOMMENDED ON SIDES OF EXCAVATION TO PREVENT SOIL MIGRATION.
OPTIONAL GEOTEXTILE BETWEEN
NONE
IF SOIL TYPES DIFFER AT ANY POINTABOVE PIPE INVERT, A GEOTEXTILE LAYER IS RECOMMENDED TO BE PLACED BETWEEN THE LAYERS TO PREVENT SOIL
LAYERS
MIGRATION.
NOTES:
• FOR MULTIPLE BARREL INSTALLATIONS, THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE THE PIPE DIAMETER /2 BUT NO LESS THAN 12" FOR DIAMETERS <72". FOR 72" AND LARGER DIAMETERS, THE MINIMUM
SPACING IS 36". CONTACT YOUR CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING.
' APPROVED REGIONAL EQUIVALENTS FOR SECTION 5A INCLUDE CA-7, CODOT #67, MIDOT 2G, 34G, OR 21AA STONE OR GRAVEL; #8; #57; MIDOT 6A, 2G, 3G, 34G.
MANUFACTURER RECOMMENDED BACKFILL
NOT TO SCALE
C=.►, NTECH° %0g%_: M=n
DY058320 TESLA RENTON
ENGINEERED SOLUTIONS LLC
CMP DETENTION SYSTEMS
Plan A
www.ContechES.Com
ONTECH
Seattle, WA
9025 Centre Pointe Dr. Suite 400 West Chester,
hester OH 45069
LDYODS
DETENTION SYSTEM
DATE
REVISION DESCRIPTION
BY
800.338-1122 513-645-7000 513-645-7993 FAX
RAWING
PROJECTNo.:
SEO. No.:
DATE:
41120
58320
8282024
DESIGNED:
DRAWN:
DYO
DYO
CHECKED:
APPROVED:
DVO
DVO
SHEET NO.:
CMP DETENTION SYSTEM INSPECTION AND
CMP DETENTION INSTALLATION GUIDE IN -SITU TRENCH WALL MAINTENANCE
WHEN PLOWABLE FILL IS USED, YOU MUST PREVENT PIPE FLOATATION.
PROPER INSTALLATION OF A FLEXIBLE UNDERGROUND DETENTION SYSTEM IF EXCAVATION IS REQUIRED, THE TRENCH WALL NEEDS TO BE CAPABLE OF TYPICALLY, SMALL LIFTSARE PLACED BETWEEN THE PIPESAND THEN UNDERGROUND STORMWATER DETENTION AND INFILTRATION SYSTEMS MUST
ALLOWED TO ET -UP PRIOR T THE PLACEMENT OF THE NEXT LIFT. THE BE INSPECTED AND MAINTAINED AT REGULAR INTERVALS FOR PURPOSES OF
WILL ENSURE LONG-TERM PERFORMANCE. THE CONFIGURATION OF THESE SUPPORTING THE LOAD THAT THE PIPE SHEDS AS THE SYSTEM IS LOADED. IF O S O O C
SYSTEMS OFTEN REQUIRES SPECIAL CONSTRUCTION PRACTICES THAT SOILS ARE NOT CAPABLE OF SUPPORTING THESE LOADS, THE PIPE CAN DEFLECT. ALLOWABLE THICKNESS OF THE CLSM LIFT IS A FUNCTION OF PROPER PERFORMANCE AND LONGEVITY.
DIFFER FROM CONVENTIONAL FLEXIBLE PIPE CONSTRUCTION. CONTECH PERFORM A SIMPLE SOIL PRESSURE CHECK USING THE APPLIED LOADS TO BALANCE BETWEEN THE UPLIFT FORCE OF THE CLSM, THE OPPOSING
WEIGHT OF THE PIPE, AND THE EFFECT OF OTHER RESTRAINING INSPECTION
ENGINEERED SOLUTIONS STRONGLY SUGGESTS SCHEDULING DETERMINE THE LIMITS OF EXCAVATION BEYOND THE SPRING LINE OF THE MEASURES. THE PIPE CAN CARRY LIMITED FLUID PRESSURE WITHOUT
PRE -CONSTRUCTION MEETING WITH YOUR LOCAL SALES ENGINEER TO OUTER MOST PIPES. PIPE DISTORTION OR DISPLACEMENT, WHICH ALSO AFFECTS THE CLSM INSPECTION IS THE KEY TO EFFECTIVE MAINTENANCE OF CMP DETENTION
DETERMINE IF ADDITIONAL MEASURES, NOT COVERED IN THIS GUIDE, ARE LIFT THICKNESS. YOUR LOCAL CONTECH SALES ENGINEER CAN HELP
APPROPRIATE FOR YOUR SITE. PROPER BACKFILL PLACEMENT AND COMPACTION TAKE CARE OSYSTEMS AND IS EASILY PERFORMED. CONTECH RECOMMENDS ONGOING,
IN MOST CASES THE REQUIREMENTS FORA SAFE WORK ARE OF THIS THIS ND DETERMINE THE PROPER LIFT THICKNESS. ANNUAL INSPECTIONS. SITES WITH HIGH TRASH LOAD OR SMALL OUTLET
CONCERN.
CONTROL ORIFICES MAY NEED MORE FREQUENT INSPECTIONS. THE RATE AT
BACKFILL- WELL GRADED WHICH THE SYSTEM COLLECTS POLLUTANTS WILL DEPEND MORE ON SITE
FOUNDATION LIVELOAD QGRANUARAND SMALLER SPECIFIC ACTIVITIES RATHER THAN THE SIZE OR CONFIGURATION OF THE
CONSTRUCTA FOUNDATION THAT CAN SUPPORT THE DESIGN LOADING CO NTROLFLOATATIONANDPIPE SYSTEM.
EMBANKMENT DISTORTIOWDISPLACEMENT
/\�
APPLIED BY THE PIPE AND ADJACENT BACKFILL WEIGHT AS WELLAS MAINTAIN �/\\/ \ \\'ice CLSM
ITS INTEGRITY DURING CONSTRUCTION. �\\/ <\\�� \�i/�i\/ f INSPECTIONS SHOULD BE PERFORMED MORE OFTEN IN EQUIPMENT
GEOTEXTILE SEPARATIONJ\\j\\j\\�EMBANKMENTVygSHDOWN AREAS, IN CLIMATES WHERE SANDING AND/OR SALTING
IF SOFT OR UNSUITABLE SOILS ARE ENCOUNTERED, REMOVE THE POOR SOILS i�i % (ABOVE AND BELOW '/\\/�\\�\ (j •�OPERATIONS TAKE PLACE AND IN OTHER VARIOUS INSTANCES IN WHICH ONE
DOWN TOA SUITABLE DEPTH AND THEN BUILDUP TO THE APPROPRIATE�//i//i//i/i/,i//i//i//i//i//i//i/i//i/i/i//i//i//i//i//i//i' GRADED EDDING BEDDING) WITH ILAVERLV �/T\�j` �\\/j WOULD EXPECT HIGHER ACCUMULATIONS OF SEDIMENT OR ABRASIVE/
ELEVATION WITH A COMPETENT BACKFILL MATERIAL. THE STRUCTURAL FILL BEDDING-WELLGRADED �j'\\ijOi� /'\�%j\lj� CORROSIVE CONDITIONS. A RECORD OF EACH INSPECTION IS TO BE
MATERIAL GRADATION SHOULD NOT ALLOW THE MIGRATION OF FINES, WHICH GRANULARAND SMALLERiT\/��ij�!/�\/i�i� MAINTAINED FOR THE LIFE OF THE SYSTEM
CAN CAUSE SETTLEMENT OF THE DETENTION SYSTEM OR PAVEMENT ABOVE. `C
WEIGHTED PIPE WITH MOBILE
IF THE STRUCTURAL FILL MATERIAL IS NOT COMPATIBLE WITH THE CONCRETE BARRIERS
UNDERLYING SOILS AN ENGINEERING FABRIC SHOULD BE USED AS A (OR OTHER REMOVABLE WEIGHTS) MAINTENANCE
SEPARATOR. IN SOME CASES, USING A STIFF REINFORCING GEOGRID BACKFILL PLACEMENT
REDUCES OVER EXCAVATION AND REPLACEMENT FILL QUANTITIES. CMP DETENTION SYSTEMS SHOULD BE CLEANED WHEN AN INSPECTION
MATERIAL SHALL BE WORKED INTO THE PIPE HAUNCHES BY MEANS OF REVEALS ACCUMULATED SEDIMENT OR TRASH IS CLOGGING THE DISCHARGE
THE AM U D USED REDUCE BACKFILL co SHOVEL -SLICING, RODDING, AIR TAMPER, VIBRATORY ROD, OR OTHER EFFECTIVE
THE AMOUNT OF UNDERCUT GEOGRII RID WASNT USED ORIFICE.
METHODS. CONSTRUCTION LOADING
\ EMBANKMENT MAXIMUM UNBALANCE LIMITED
ACCUMULATED SEDIMENT AND TRASH CAN TYPICALLY BE EVACUATED
Toe LIFrs 1S TYPICALLY, THE MINIMUM COVER SPECIFIED FORA PROJECT ASSUMES H-20
(APPROX. )THROUGH THE MANHOLE OVER THE OUTLET ORIFICE. IF MAINTENANCE IS NOT
j\\/\j%/\\j\EMBANKMENT LIVE LOAD. BECAUSE CONSTRUCTION LOADS OFTEN EXCEED DESIGN LIVE PERFORMED AS RECOMMENDED, SEDIMENT AND TRASH MAY ACCUMULATE IN
PIPE PIPEC PIPED j/\\\ LOADS, INCREASED TEMPORARY MINIMUM COVER REQUIREMENTS ARE FRONT OF THE OUTLET ORIFICE. MANHOLE COVERS SHOULD BE SECURELY
NECESSARY. SINCE CONSTRUCTION EQUIPMENT VARIES FROM JOB TO JOB, SEATED FOLLOWING CLEANING ACTIVITIES. CONTECH SUGGESTS THAT ALL
SYSTEMS BE DESIGNED WITH AN ACCESS/INSPECTION MANHOLE SITUATED AT
IT IS BEST TO ADDRESS EQUIPMENT SPECIFIC MINIMUM COVER
L OR NEAR THE INLET AND THE OUTLET ORIFICE. SHOULD IT BE NECESSARY TO
UNDERABLE SO REPLACE %\\/\\�\\j \/\/\\/ /\\f\\/\ \ \/\\/\\ /\/\ \\/�\
BEDDING UNSUITABLE SOILS 1/O'er'/\\\�'\\'/O'/\\//\\/\`'/\�O//\\'/\\'/\\/\\'/\'\ \ \ � REQUIREMENTS WITH YOUR LOCAL CONTECH SALES ENGINEER DURING GET INSIDE THE SYSTEM TO PERFORM MAINTENANCE ACTIVITIES, ALL
GRADE THE FOUNDATION SUBGRADE TOA UNIFORM OR SLIGHTLY SLOPING W LOOSE LIFTS BEDDING YOUR PRE -CONSTRUCTION MEETING. APPROPRIATE PRECAUTIONS REGARDING CONFINED SPACE ENTRYAND OSHA
GRADE. IF THE SUBGRADE IS CLAY OR RELATIVELY NON -POROUS AND THE REGULATIONS SHOULD BE FOLLOWED.
CONSTRUCTION SEQUENCE WILL LAST FOR AN EXTENDED PERIOD OF TIME, ANNUAL INSPECTIONS ARE BEST PRACTICE FOR ALL UNDERGROUND SYSTEMS.
IT IS BEST TO SLOPE THE GRADE TO ONE END OF THE SYSTEM. THIS WILL IF AASHTO T99 PROCEDURES ARE DETERMINED INFEASIBLE BY THE DURING THIS INSPECTION, IF EVIDENCE OF SALTING/DE-ICING AGENTS IS
ALLOW EXCESS WATER TO DRAIN QUICKLY, PREVENTING SATURATION OF THE GEOTECHNICAL ENGINEER OF RECORD, COMPACTION IS CONSIDERED ADDITIONAL CONSIDERATIONS OBSERVED WITHIN THE SYSTEM, IT IS BEST PRACTICE FOR THE SYSTEM TO BE
SUBGRADE. ADEQUATE WHEN NO FURTHER YIELDING OF THE MATERIAL IS OBSERVED RINSED, INCLUDING ABOVE THE SPRING LINE SOON AFTER THE SPRING THAW
UNDER THE COMPACTOR, OR UNDER FOOT, AND THE GEOTECHNICAL BECAUSE MOST SYSTEMS ARE CONSTRUCTED BELOW -GRADE, RAINFALL AS PART OF THE MAINTENANCE PROGRAM FOR THE SYSTEM.
ENGINEER OF RECORD (OR REPRESENTATIVE THEREOF) IS SATISFIED WITH THE LEVEL OF COMPACTION. CAN RAPIDLY FILL THE EXCAVATION; POTENTIALLY CAUSING FLOATATION GEOMEMBRANE BARRIER AND MOVEMENT OF THE PREVIOUSLY PLACED PIPES. TO HELP MITIGATE MAINTAINING AN UNDERGROUND DETENTION OR INFILTRATION SYSTEM ISEASIEST WHEN THERE IS NO FLOW ENTERING THE SYSTEM. FOR THIS
A SITE'S RESISTIVITY MAY CHANGE OVER TIME WHEN VARIOUS TYPES OF FOR LARGE SYSTEMS, CONVEYOR SYSTEMS, BACKHOES WITH LONG POTENTIAL PROBLEMS, IT IS BEST TO START THE INSTALLATION AT THE REASON, IT ISAGOOD IDEA TO SCHEDULE THE CLEANOUT DURING DRY
SALTING AGENTS ARE USED, SUCH AS ROAD SALTS FOR DEICING AGENTS. IF REACHES OR DRAGLINES WITH STONE BUCKETS MAY BE USED TO PLACE DOWNSTREAM END WITH THE OUTLET ALREADY CONSTRUCTED TO ALLOW WEATHER.
BACKFILL. ONCE MINIMUM COVER FOR CONSTRUCTION LOADING ACROSS A ROUTE FOR THE WATER TO ESCAPE. TEMPORARY DIVERSION MEASURES
SALTING AGENTS ARE USED ON OR NEAR THE PROJECT SITE, A GEOMEMBRANE THE ENTIRE WIDTH OF THE SYSTEM IS REACHED, ADVANCE THE EQUIPMENT THE FOREGOING INSPECTION AND MAINTENANCE EFFORTS HELP ENSURE
BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS TO THE END OF THE RECENTLY PLACED FILL, AND BEGIN THE SEQUENCE MAY BE REQUIRED FOR HIGH FLOWS DUE TO THE RESTRICTED NATURE OF UNDERGROUND PIPE SYSTEMS USED FOR STORMWATER STORAGE CONTINUE
INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE AGAIN UNTIL THE SYSTEM IS COMPLETELY BACKFILLED. THIS TYPE OF THE OUTLET PIPE. TO FUNCTION AS INTENDED BY IDENTIFYING RECOMMENDED REGULAR
EFFECTS THAT MAY RESULT FROM THE USE OF SUCH AGENTS INCLUDING CONSTRUCTION SEQUENCE PROVIDES ROOM FOR STOCKPILED BACKFILL INSPECTION AND MAINTENANCE PRACTICES. INSPECTION AND MAINTENANCE
DIRECTLY BEHIND THE BACKHOE, AS WELLAS THE MOVEMENT OF CATCH BASIN RELATED TO THE STRUCTURAL INTEGRITY OF THE PIPE OR THE SOUNDNESS
PREMATURE CORROSION AND REDUCED ACTUAL SERVICE LIFE. CONSTRUCTION TRAFFIC. MATERIAL STOCKPILES ON TOP OF THE INLET OF PIPE JOINT CONNECTIONS IS BEYOND THE SCOPE OF THIS GUIDE.
BACKFILLED DETENTION SYSTEM SHOULD BE LIMITED TO 8- TO 10-FEET HIGH WATER PAVED PARKING LOT
THE PROJECT'S ENGINEER OF RECORD IS TO EVALUATE WHETHER SALTING AND MUST PROVIDE BALANCED LOADING ACROSS ALL BARRELS. TO -WATER
AGENTS WILL BE USED ON OR NEAR THE PROJECT SITE, AND USE HIS/HER ii ---
BEST JUDGEMENT TO DETERMINE IFANYADDITIONAL PROTECTIVE DETERMINE THE PROPER COVER OVER THE PIPES ALLOW THE
MEASURES ARE REQUIRED. BELOW IS ATYPICAL DETAIL SHOWING THE MOVEMENT OF CONSTRUCTION EQUIPMENT SEE TABB LE 1, OR CONTACT YOUR - --
PLACEMENT OF A GEOMEMBRANE BARRIER FOR PROJECTS WHERE SALTING LOCAL CONTECH SALES ENGINEER. WATER ELEVATION IN
AGENTS ARE USED ON OR NEAR THE PROJECT SITE. DereNTloN sysrEM
FINISHED FUNCTIONING 3VSTEM
e sox"I� ore' TYPICAL BACKFILL SEQUENCE
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9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069
CONTECH
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DRAWING
Seattle, WA
DETENTION SYSTEM
CHECKED: APPROVED:
DYO DYO
SHEET NO.:
1 R-432716
800338-1122 513b15-7000 513-645-7993 FAX
DATE
REVISION DESCRIPTION
BY
SURVEYED:
04/01 /21
DESIGNED:
BB/AT/HD
DRAWN:
BB/AT/HD
CHECKED: cm
BY DATE APPR APPROVED:
SCALE:
AS SHOWN
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
SCALE ACCORDINGLY
VERTICAL: NAVD 1988
HORIZONTAL: NAD 1983/1991
DATU M
CITY OF
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STORM DRAIN & STORMWATER
MANAGEMENT DETAILS
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DATE:
04/07/2025
FIELDBOOK:
PAGE:
DRAWING NO:
C-507
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