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Home My WebLink AboutR-428309C'7 CD N W c•••r� Iy Z J L, PROJECT SUMMARY CALCULATION DETAILS • LOADING = HS20/HS25 • APPROX. LINEAR FOOTAGE = 111 LF STORAGE SUMMARY • STORAGE VOLUME REQUIRED = 4,095 CF • PIPE STORAGE VOLUME = 3,138 CF • BACKFILL STORAGE VOLUME = 1,029 CF • TOTAL STORAGE PROVIDED = 4,168 CF PIPE DETAILS • DIAMETER = 72" • CORRUGATION = 5xl GAGE = 16 • COATING =ALT2 • WALL TYPE = PERFORATED • BARREL SPACING = 36" BACKFILL DETAILS • WIDTH AT ENDS = 12" • ABOVE PIPE = 0" • WIDTH AT SIDES = 12" • BELOW PIPE = 0"-0" 4 NOTES LA I • 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 )/2" 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 5 APPROVAL. FOR EXAMPLE, TOTAL EXCAVATION DOES NOT CONSIDER ALL VARIABLES SUCH AS SHORING AND ONLY ACCOUNTS FOR MATERIAL WITHIN THE a ESTIMATED EXCAVATION FOOTPRINT. • THESE DRAWINGS ARE FOR CONCEPTUAL PURPOSES o AND DO NOT REFLECT ANY LOCAL PREFERENCES OR ASSEMBLY REGULATIONS. PLEASE CONTACT YOUR LOCAL CONTECH REP FOR MODIFICATIONS. SCALE: 1" _ 10' PROJ31062 : SE45IN DATE: ® \I//�uTCwu® ..- .-� DY045199 Sierra Homes Short Plat "DB2 45,99 are2024 DESIGNED: DYO DRAWN: Dvo w inM N, h�mdua'm:awSealm°%tin•^• v CONTECH"' ENGINEERED SOLUTIONS LLC CMP DETENTION SYSTEMS Detention System G n� •"nq��.a i„I°,mne^upn Mi'A www.ContechES.com CONTECH Issaquah, WA CHECKED: DVG A➢PROVED: DYO o ' 9025 Centre Pointe Dr., Suite 400, West Chester, OH 4506' DYODS DRAWING DETENTION SYSTEM DATE REVISION DESCRIPTION BY 38-1122 513-645-7000 513-645-7 eooa as3FAX SHEET NO: 1 TEMPORARY COVER FOR CONSTRUCTION LOADS HEIGHT OF COVER FINISHED GRADE CONSTRUCTION LOADS FOR TEMPORARY CONSTRUCT ON 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 18-50 50-75 1 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. A ACCESS CASTING TO BE PROVIDED AND INSTALLED BY CONTRACTOR. q 1O d a d GASKET MATERIAL °CMP RISER J SUFFICIENT TO PREVENT a SLAB FROM BEARING ON o RISER TO BE PROVIDED BY a - CONTRACTOR. GB 11"TYP. rn SECTION VIEW O eA #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), SEE NOTE 7. l O G c OPENING IN PROTECTION SLAB FOR CASTING SCOPE PIPE THIS SPECIFICATION COVERS THE MANUFACTURE AND INSTALLATION OF THE PIPE SHALL BE MANUFACTURED IN ACCORDANCE TO THEAPPLICABLE 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 POLYMER COATED: AASHTO M-245 OR ASTM A-762 REQUIREMENTS OF AASHTO M-274 OR ASTM A-92. ALUMINUM: AASHTO M-196 ORASTM 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 PIPE ASSOCIATION) 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 OF AASHTO M-197 OR ASTM B-744. INSTALLATION SHALL BE IN ACCORDANCE WITH AASHTO STANDARD SPECIFICATIONS FOR CONSTRUCTION LOADS HIGHWAY BRIDGES, SECTION 26, DIVISION II DIVISION II OR ASTM 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 (FORALUMINUM 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. Encomr)ass ENGINEERING & SURVEYING Western Washington Division 165 NE Juniper Street, Suite 201 • Issaquah, WA 98027 It Phone: (425) 392-0250 Eastern Washington Division 407 Swiftwater Blvd. • Cle Elum, WA 98922 It Phone: (509) 674-7433 INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. #4 DIAGONAL TRIP BAR (TYR 4 PLACES SEE NOTE-, 2" COVER (TYP) �I t OPENING I PROTECTIO SLAB FOI CASTINI REINFORCING TABLE —BEARING 0 CMP RISER A 0 B REINFORCING PRESSURE (PSF) 24" 0 4' 26" #5 @ 12" OCEW 2,410 4'X4' #5 @ 12" OCEW 1,780 o 4'1" 32 #5 @ 12" OCEW 2,120 4'-6" X 4'-6" #5 @ 12" OCEW 1,530 36 .5' 5' 38 #5 @ 10" OCEW 1,890 X 5' ifs @ 10" OCEW 1,350 42" 0 V-6" 5'-6" 44" #5 @ 10" OCEW 1,720 X 5'-6" #5 @ 9" OCEW 1,210 48" e 6' 6' S06' #5 @ 9" OCEW 1,600 X #5@8"OCEW 1,100 "" ASSUMED SOIL BEARING CAPACITY \\ STANDARD STANDARD \t v— REINFORCING, REINFORCING, y eB 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, 171h EDITION. 7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND BARS MINIMUM OF 12" BEYOND OPENING, BEND 2. DESIGN LOAD HS25. BARS AS REQUIRED TO MAINTAIN BAR COVER. 3. EARTH COVER = 1' 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 THE SAME PLANE. SCALE: N.T.S. IL CMP DETENTION SYSTEMS CONTECH DYODS DRAWING r I PER CITY COMMENTS 2 SITE PLAN & DRAINAGE PER CITY COMMENTS REVISION CJA 03108124 SURVEYED: DBM NEM 08121118 DESIGNED: SS DRAWN: PS CHECKED: CA BY DATE AP P R APPROVED: CA TABLE 1: DIAMETER, D MIN. COVER CORR. PROFILE W-10" 12" 1 1/2" x 114" 12"-48" 12" 2 2/3"x 1/2" >48"-96" 12" 3" x 1", 5" x 1" >96" D/8 3" 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. TRENCH 1�FILL ENVELOPE EMBANKMENT MINIMUM WIDTH DEPENDS ON SITE CONDITIONS AND ENGINEERING JUDGEMENT INSTALLATION NOTES 1. WHEN PLACING THE FIRST LIFTS OF BACKFILL IT IS IMPORTANT TO MAKE SURE THAT THE BACKFILL IS PROPERLY COMPACTED UNDER AND AROUND THE PIPE HAUNCHES. 2. OTHERALTERNATE BACKFILL MATERIAL MAY BE ALLOWED DEPENDING ON SITE SPECIFIC CONDITIONS, AS APPROVED BY SITE ENGINEER. 3. AN HDPE MEMBRANE LINER WILL BE PLACED ON THE CROWN OF EACH PIPE TO PROVIDE AN IMPERMEABLE BARRIER AGAINST ENVIRONMENTAL CHANGES THAT MAYADVERSELY AFFECT THE SYSTEM OVER TIME. PLEASE REFER TO THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL TECHNICAL DETAILS. CMP RETENTION 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: .OD PIPE 24"- 144": PIPE15 12": D + 16" PIPE > 144" D + 10'0" PIPE > 12": 1.5D + 12" FOUNDATION AASHTO 26.5.2 - PER ENGINEER OF RECORD PRIOR TO PLACING THE BEDDING, THE FOUNDATION MUST BE CONSTRUCTED TO A UNIFORM AND STABLE GRADE. IN THE EVENT THAT UNSUITABLE 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. ENGINEER OF RECORD TO DETERMINE IF BEDDING IS REQUIRED. PIPE MAY BE PLACED ON THE TRENCH BOTTOM OF A RELATIVELY LOOSE, NATIVE SUITABLE WELL GRADED GRANULAR BEDDING AASHTO M 43: 3, 357, 4, 467, 5, 56, 57 MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, 2" MIN DEPTH. THE BEDDING MATERIAL MAY BE SUITABLE OPEN GRADED GRANULAR BEDDING CONFORMING TO AASHTO SOIL CLASSIFICATIONS Al, A2, ORA3 WITH MAXIMUM PARTICLE SIZE OF 3" PER AASHTO 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" -1- NI AN LA A SE LIFTS AND COMPACTED TO 90% STANDARD PROCTOR PER AASHTO T 99. BACKFILL SHALL BE PLACED SUCH THAT THERE IS NO MORE THAN A TWO LIFT (16") DIFFERENTIAL BETWEEN BACKFILL M 3, , 4, 5, 57 OR APPROVED NY OF THE PIPES AT ANYTIME DURING THE BACKFILL PROCESS. THE BACKFILL SHOULD BE ADVANCED ALONG THE LENGTH OF THE SYSTEM TO AVOID DIFFERENTIAL LOADING. WHERE EQUAL" CONVENTIONAL COMPACTION TESTING IS NOT PRACTICAL, THE MATERIAL SHALL BE MECHANICALLY COMPACTED UNTIL NO FURTHER YIELDING OF MATERIAL IS OBSERVED UNDER THE COMPACTOR. "IN AREAS WITH HIGH WATER TABLE FLUCTUATIONS THAT INTERACT WITH THE PIPE ZONE, CONSIDER INSTALLING A GEOTEXTILE SEPARATION LAYER TO PREVENT SOIL MIGRATION. COVER MATERIAL UP FO MIN. COVER -AASHTO M 145: A-1, A-2, A3 ABOVE COVER MATERIAL MAY INCLUDE NON -BITUMINOUS, GRANULAR ROADBASE MATERIAL WITHIN MIN COVER LIMITS 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 REQUIREMENTS SHALL FOLLOW THE APPLICABLE) 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. GEOTEXTILE BETWEEN LAYERS NONE IF SOIL TYPES DIFFER ATANY POINTABOVE PIPE INVERT, A GEOTEXTILE LAYER IS RECOMMENDED TO BE PLACED BETWEEN THE LAYERS TO PREVENT SOIL 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 5 INCLUDE CA-7, MIDOT 6AA, 6A, OR 5G, PROVIDED THEY MEET THE PARTICLE SIZES INDICATED. MANUFACTURER RECOMMENDED BACKFILL NOT TO SCALE �I7� • w I/�VTCwV® PROs1G.: SE45IN DAE: _ V DY045199 Sierra Homes Short Plat NEE: 45199 382024 C� NTECH DESIGNED DRAWN ENGINEERED SOLUTIONS LLC CMP DETENTION SYSTEMS Detention System DYO Dvo www.ContechES.com Issaquah, WA CHECKED: A➢PROVED: po„"nm CONTECH DVG DYO 9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069 DYODS 800-338-1122 513-645-7000 513-645-7993 FAX DRAWING DETENTION SYSTEM SHEET NO: DATE REVISION DESCRIPTION BY 1 CMP DETENTION SYSTEM INSPECTION AND CMP DETENTION INSTALLATION GUIDE IN -SITU TRENCH WALL MAINTENANCE WHEN FLOWABLE 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 LIFTS ARE PLACED BETWEEN THE PIPES AND THEN UNDERGROUND STORMWATER DETENTION AND INFILTRATION SYSTEMS MUST WILL ENSURE LONG-TERM PERFORMANCE. THE CONFIGURATION OF THESE SUPPORTING THE LOAD THAT THE PIPE SHEDS AS THE SYSTEM IS LOADED. IF ALLOWED TO SET-UP PRIOR TO THE PLACEMENT OF THE NEXT LIFT. THE BE INSPECTED AND MAINTAINED AT REGULAR INTERVALS FOR PURPOSES OF 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 A 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 A 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 SYSTEMS AND IS EASILY PERFORMED. CONTECH RECOMMENDS ONGOING, IN MOST CASES THE REQUIREMENTS FOR ASAFE WORK ENVIRONMENT AND DETERMINE THE PROPER LIFT THICKNESS. ANNUAL INSPECTIONS. SITES WITH HIGH TRASH LOAD OR SMALL OUTLET APPROPRIATE FOR YOUR SITE. PROPER BACKFILL PLACEMENTAND COMPACTION TAKE CARE OF THIS CONCERN. CONTROL ORIFICES MAY NEED MORE FREQUENT INSPECTIONS. THE RATE AT BACKFILL- WELLGRADED WHICH THE SYSTEM COLLECTS POLLUTANTS WILL DEPEND MORE ON SITE FOUNDATION LIVE LOAD t..UTARANDSMALLER STAGE POURSAS REQUIREDTO SPECIFIC ACTIVITIES RATHER THAN THE SIZE OR CONFIGURATION OF THE CONSTRUCTA FOUNDATION THAT CAN SUPPORT THE DESIGN LOADING CO NTROLFLOATATIONAND PIPE SYSTEM. \ APPLIED BY THE PIPE AND ADJACENT BACKFILL WEIGHT AS WELL AS MAINTAIN EMBANKMENT DISTORTIONMISPLACEMENT \ cLSM ITS INTEGRITY DURING CONSTRUCTION. INSPECTIONS SHOULD BE PERFORMED MORE OFTEN IN EQUIPMENT GEOTEXTILE SERA ON EMBANIOAENT WASHDOWN AREAS, IN CLIMATES WHERE SANDING AND/OR SALTING IF SOFT OR UNSUITABLE SOILS ARE ENCOUNTERED, REMOVE THE POOR SOILS \.�/ \ \ \ \,\ �, \ \' �; \r \ (ABOVE ABOADBELOWWITH UNIFORMLY / OPERATIONS TAKE PLACE, AND IN OTHER VARIOUS INSTANCES IN WHICH ONE DOWN TO A SUITABLE DEPTH AND THEN BU ILD UP TO THE APPROPRIATE�i��i ��i��i/T�/i///% BEDDING)\� �\ GRADED BEDDING LAYER. ./ /j '' WOULD EXPECT HIGHER ACCUMULATIONS OF SEDIMENT OR ABRASIVE/ ELEVATION WITH A COMPETENT BACKFILL MATERIAL. THE STRUCTURAL FILL BEDDING-WELLGRADED� / \i/ - \ CORROSIVE CONDITIONS. A RECORD OF EACH INSPECTION IS TO BE MATERIAL GRADATION SHOULD NOTALLOW THE MIGRATION OF FINES, WHICH GRANULARAND SMALLER \ //\T \ MAINTAINED FOR THE LIFE OF THE SYSTEM CAN CAUSE SETTLEMENT OF THE DETENTION SYSTEM OR PAVEMENT ABOVE. 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 BACKFILL PLACEMENT (OR OTHER REMOVABLE WEIGHTS) MAINTENANCE SEPARATOR. IN SOME CASES, USING ASTIFF REINFORCING GEOGRID 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 GEOGRID USEDTO REDUCE BACKFILL COVER SHOVEL -SLICING, RODDING, AIR TAMPER, VIBRATORY ROD, OR OTHER EFFECTIVE THEAMOUNTOF UNDERCUT GEOGRIDWASNTUSED METHODS. CONSTRUCTION LOADING ORIFICE. / �\\E.EANKMENT MAXIMUM UNBNANCE LIMITED ACCUMULATED SEDIMENTAND TRASH CAN TYPICALLY BE EVACUATED T021-1—(APPROX.1s) TYPICALLY, THE MINIMUM COVER SPECIFIED FORA PROJECTASSUMES H-20 THROUGH THE MANHOLE OVER THE OUTLET ORIFICE. IF MAINTENANCE IS NOT EMBANKMENT LIVE LOAD. BECAUSE CONSTRUCTION LOADS OFTEN EXCEED DESIGN LIVE PERFORMED AS RECOMMENDED, SEDIMENTAND TRASH MAY ACCUMULATE IN \ IPEPIPPIPED PIPE D \ 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 \ \ GEOGRI IT IS BEST TO ADDRESS EQUIPMENT SPECIFIC MINIMUM COVER \ \ \ \ OR NEAR THE INLET AND THE OUTLET ORIFICE. SHOULD IT BE NECESSARY TO BEDDING UNSUTABLESOILSPLACE \ \/\ \//\ \ REQUIREMENTS WITH YOUR LOCAL CONTECH SALES ENGINEER DURING GET INSIDE THE SYSTEM TO PERFORM MAINTENANCE ACTIVITIES, ALL GRADE THE FOUNDATION SUBGRADE TO A UNIFORM OR SLIGHTLY SLOPING R. 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 FORAN 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 CAN RAPIDLY FILL THE EXCAVATION; POTENTIALLY CAUSING FLOATATION THE LEVEL OF COMPACTION. MAINTAINING AN UNDERGROUND DETENTION OR INFILTRATION SYSTEM IS GEOMEMBRANE BARRIER AND MOVEMENT OF THE PREVIOUSLY PLACED PIPES. TO HELP MITIGATE EASIEST 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 STARTTHE INSTALLATION AT THE REASON, IT IS A GOOD 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 OUTLETALREADY 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 MAY BE REQUIRED FOR HIGH FLOWS DUE TO THE RESTRICTED NATURE OF 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 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. THE PROJECTS ENGINEER OF RECORD IS TO EVALUATE WHETHER SALTING BACKFILLED DETENTION SYSTEM SHOULD BE LIMITED TO 8- TO 10-FEET HIGH WATER —WATER vAvsD PARKING LOT AGENTS WILL BE USED ON OR NEAR THE PROJECT SITE, AND USE HIS/HER AND MUST PROVIDE BALANCED LOADING ACROSS ALL BARRELS. TO \\ BEST JUDGEMENT TO DETERMINE IF ANYADDITIONAL PROTECTIVE DETERMINE THE PROPER COVER OVER THE PIPES TO ALLOW THE MEASURES ARE REQUIRED. BELOW IS ATYPICAL DETAIL SHOWING THE MOVEMENT OF CONSTRUCTION EQUIPMENT SEE TABLE I, OR CONTACT YOUR PLACEMENT OF A GEOMEMBRANE BARRIER FOR PROJECTS WHERE SALTING LOCAL CONTECH SALES ENGINEER. WATER ELEVATION IN DETENTION SYSTEM AGENTS ARE USED ON OR NEAR THE PROJECT SITE. FINISHED FUNCTIONING SYSTEM ry TYPICALSACKFILLSEQUENCE TROL i iur OUTLET CON -1r ar Tr Tr' \ BAN KME Nr IMM -1 / \ remaeoo;°°� PROJECT- So. DY045199 Sierra Homes Short Plat No.: DATE: A��I/�„TCwu® 31062 45IN 318/2024 wmmWv meeue wnows` µam �1►,i\ r=r� DESIGNED: DRAWN: C�1INTECH® (N"I,aNm,""yINNIm°«.n�n.•dII�N, ENGINEERED SOLUTIONS LLC CMP DETENTION SYSTEMS Detention System DYO Dvo www.ContechES.com Issaquah, WA CHECKED: A➢PROVED: CONTECH DVG DYO 9025CentrePointeDr.,Suite400, West Chester, OH45069 DYODS BooJ38-„22 5,3E48-7o00 513-645-7993 FAX DRAWING DETENTION SYSTEM SHEET NO: DATE REVISION DESCRIPTION BY 1 SCALE: 1 "=20' ONE INCH AT FULL SCALE IF NOT ONE INCH SCALE ACCORDINGLY VERTICAL: NAVD 1988 HORIZONTAL: NAD 1983/1991 DATU M Know what's beIow. Call before you dig. • CITY OF PRI RENTON • Planning/Building/Public Works Dept. A N 'CN 0— CM N �N''� O / O/�\ co N , On N N Q J I— R-428309ii J IN COMPLIANCE WITH CITY OF RENTON STANDARDS I— DEVELOPMENT ENGINEERING -. O HHuynh 09/27/2024 = cry cn LIJ 2E DATE: O SIERRA HOMES SHORT PLAT 06/19/2024 = L LI A 2 2- 0 0 0 315 FIELDBOOK: PAGE: DRAWING NO: CONSTRUCTION DETAILS III 21706 L.Lj SHEET: 9 OF: 10 V)