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Alpine Chalet
Joel Gray
Ryan Loftus
Joel Gray
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Alpine Chalet
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From: Ryan Loftus <ryan@aspeneng.net>
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Subject: Alpine Chalet
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Ryan Loftus
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ryan@aspeneng.net
Joel Gray
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Alpine Chalet
Joel,
Here’s the Contech Drawings.
-Ryan Loftus, PE
Aspen
Engineering, Inc.
10727 N. Yellowstone Hwy.
Idaho Falls, Idaho 83401
Tel. 208-542-1911
01BE2F2D4D06374F83AD188761219DA1@rexburg.org
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Ryan Loftus
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Ryan Loftus
Ryan Loftus
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joelg@rexburg.org
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DYODS_4524-1.pdfD4
174'-23 4" 14'-0" 1'-83 4" ¡678% 14'-0" ¡678% 5'-712" ¡5,6(5 13'-0" ¡5,6(5 74'-13 4" ¡678% 14'-0" ¡678% 77'-8" ¡5,6(5 13'-0" ¡5,6(5 DYODS CHECKED: DRAWN:
DYODS DESIGNED: APPROVED: C:\DYODS\DATA\CPC\DYODS_4524-1.DWG 7/28/2017 3:42 AM SHEET NO.: 7/28/2017 DATE:PROJECT No.: 4524-1 SEQ. No.: 0 D1 CONTECH DRAWING DYODS 800-338-1122
513-645-7000 513-645-7993 FAX REVISION DESCRIPTIONDATE BY NOTES x 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. x ALL FITTINGS AND REINFORCEMENT COMPLY WITH ASTM A998. x ALL RISERS AND STUBS
ARE 2 23" x 12" CORRUGATION AND 16 GAGE UNLESS OTHERWISE NOTED. x RISERS TO BE FIELD TRIMMED TO GRADE. x 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. x BAND TYPE TO BE DETERMINED UPON FINAL DESIGN. x 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 ONLY ACCOUNTS FOR MATERIAL WITHIN THE ESTIMATED
EXCAVATION FOOTPRINT. The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech").
Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's
own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field
conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs
based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com NOTE: THESE DRAWINGS ARE FOR CONCEPTUAL PURPOSES AND DO NOT REFLECT ANY LOCAL PREFERENCES
OR REGULATIONS. PLEASE CONTACT YOUR LOCAL CONTECH REP FOR MODIFICATIONS. CALCULATION DETAILS xLENGTH PER BARREL = 174 FT xLENGTH PER HEADER = 14 FT xLOADING = H20 & H25 x APPROX. CMP
FOOTAGE = 870 FT PIPE DETAILS xDIAMETER = 24 IN x CORRUGATION = 2-2/3" X 1/2" x GAGE = 18 x COATING = ALUMINIZED STEEL TYPE 2 (ALT2) x WALL TYPE = PERFORATED xBARREL SPACING = 12 IN
BACKFILL DETAILS x WIDTH AT ENDS = 12 IN x ABOVE PIPE = 6 IN x WIDTH AT SIDES = 12 IN x BELOW PIPE = 6 IN STORAGE SUMMARY x STORAGE VOLUME REQUIRED 5,000 CF x PIPE STORAGE = 2,733 CF
x STRUCTURAL BACKFILL STORAGE = 2,285 CF x TOTAL STORAGE PROVIDED = 5,019 CF ASSEMBLY SCALE: 1" = 20' PROJECT SUMMARY DYODS - 4524-1-0 PROJECT NAME: Alpine Chalet Apartments Rexburg,
ID DESCRIPTION: OPTION 1 KEY 1.) RIGID OR FLEXIBLE PAVEMENT 2.) GRANULAR ROAD BASE 3.) 12" MIN. FOR DIAMETERS THROUGH 96" 18" MIN. FOR DIAMETERS FROM 102" AND LARGER MEASURED
TO TOP OF RIGID OR BOTTOM OF FLEXIBLE PAVEMENT. 4.) FREE DRAINING ANGULAR WASHED STONE 3/4" - 2" MIN. PARTICLE SIZE. 5.) GRANULAR BEDDING, ROUGHLY SHAPED TO FIT THE
BOTTOM OF PIPE, 4"- 6" IN DEPTH. 6.) CONTECH C-40 OR C-45 NON-WOVEN GEOTEXTILE REQUIRED, WRAPPING TRENCH ONLY. 3 1 2 FOUNDATION/BEDDING PREPARATION 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 BROUGHT BACK TO THE GRADE WITH A FILL MATERIAL AS APPROVED BY THE ENGINEER. ONCE THE FOUNDATION PREPARATION IS COMPLETE, THE 4 INCHES OF A WELL-GRADED GRANULAR MATERIAL SHALL BE
PLACED AS THE BEDDING. BACKFILL THE BACKFILL MATERIAL SHALL BE FREE-DRAINING ANGULAR WASHED STONE 3/4" - 2" PARTICLE SIZE. MATERIAL SHALL BE PLACED IN 8"-10" MAXIMUM LIFTS. MATERIAL
SHALL BE WORKED INTO THE PIPE HAUNCHES BY MEANS OF SHOVELSLICING, RODDING, AIR-TAMPER, VIBRATORY ROD, OR OTHER EFFECTIVE METHODS COMPACTION IS CONSIDERED ADEQUATE WHEN NO FURTHER YIELDING
OF THE MATERIAL IS OBSERVED UNDER THE COMPACTOR, OR UNDER FOOT, AND THE PROJECT ENGINEER OR HIS REPRESENTATIVE IS SATISFIED WITH THE LEVEL OF COMPACTION. INADEQUATE COMPACTION CAN LEAD
TO EXCESSIVE DEFLECTIONS WITHIN THE SYSTEM AND SETTLEMENT OF THE SOILS OVER THE SYSTEM. BACKFILL SHALL BE PLACED SUCH THAT THERE IS NO MORE THAN A TWO-LIFT DIFFERENTIAL BETWEEN THE
SIDES OF ANY PIPE IN THE SYSTEM AT ALL TIMES DURING THE BACKFILL PROCESS. BACKFILL SHALL BE ADVANCED ALONG THE LENGTH OF THE SYSTEM AT THE SAME RATE TO AVOID DIFFERENTIAL LOADING ON
ANY PIPES IN THE SYSTEM. EQUIPMENT USED TO PLACE AND COMPACT THE BACKFILL SHALL BE OF A SIZE AND TYPE SO AS NOT TO DISTORT, DAMAGE, OR DISPLACE THE PIPE. ATTENTION MUST BE GIVEN TO
PROVIDING ADEQUATE MINIMUM COVER FOR SUCH EQUIPMENT, AND MAINTAINING BALANCED LOADING ON ALL PIPES IN THE SYSTEM, DURING ALL SUCH OPERATIONS. OTHER ALTERNATE BACKFILL MATERIAL MAY BE
ALLOWED DEPENDING ON SITE SPECIFIC CONDITIONS. REFER TO TYPICAL BACKFILL DETAIL FOR MATERIAL REQUIRED. 4 5 6 6 TYPICAL SECTION VIEW LINER OVER ROWS SCALE: N.T.S. LIMITS OF REQUIRED
BACKFILL 20 MIL PE IMPERMEABLE LINER OVER TOP OF PIPE (IF REQUIRED) NOTE: IF SALTING AGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE PROJECT, A GEOMEMBRANE BARRIER IS RECOMMENDED
WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE EFFECTS THAT MAY RESULT FROM A CHANGE IN THE SURROUNDING ENVIRONMENT OVER A
PERIOD OF TIME. PLEASE REFER TO THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL INFORMATION. 7%' TBD" TYP. TBD" TYP. TYPICAL PERFORATION DETAIL SCALE: N.T.S. 1.50"
2.8" COIL WIDTH 2 2/3" x 1/2" CORRUGATION - STEEL AND ALUMINUM CMP EDGE SPACING EQUAL ON BOTH SIDES OPEN AREA = 3.76 SQ IN/SQ FT 2.05" NOTES: 1. PERFORATIONS MEET AASHTO AND ASTM SPECIFICATIONS.
2. PERFORATION OPEN AREA PER SQUARE FOOT OF PIPE IS BASED ON THE NOMINAL DIAMETER AND LENGTH OF PIPE. 3. ALL DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES. 4. $//+2/(6
2.00" 3.54" COIL WIDTH 3" x 1" CORRUGATION - STEEL AND ALUMINUM CMP (COIL PROVIDED FROM CONTECH LANTANA, FL PLANT) OPEN AREA = 4.16 SQ IN/SQ FT 2.04" 1.75" CC TYP 2.711" 9@2.711" =
24.399" COIL WIDTH 5" x 1" CORRUGATION - STEEL ONLY EDGE SPACING EQUAL ON BOTH SIDES OPEN AREA = 3.33 SQ IN/SQ FT DYODS CHECKED: DRAWN: DYODS DESIGNED: APPROVED: C:\DYODS\DATA\CPC\DYODS_4524-1.DWG
7/28/2017 3:42 AM SHEET NO.: 7/28/2017 DATE:PROJECT No.: 4524-1 SEQ. No.: 0 D2 CONTECH DRAWING DYODS 800-338-1122 513-645-7000 513-645-7993 FAX REVISION DESCRIPTIONDATE
BY The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech").
Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's
own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field
conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs
based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com TYPICAL RISER DETAIL SCALE: N.T.S. ELEVATION END RISER (TYP.) SEE DETAIL 3,3( 2'-6" 3,3(
2'-6" 3,3( PLAN FRONT TYPICAL MANWAY DETAIL SCALE: N.T.S. NOTE: MANWAY DETAIL APPLICABLE FOR CMP SYSTEMS WITH DIAMETERS 48" AND LARGER. MANWAYS MAY BE REQUIRED ON SMALLER SYSTEMS
DEPENDING ON ACTUAL SITE SPECIFIC CONDITIONS. NOTE: LADDERS ARE OPTIONAL AND ARE NOT REQUIRED FOR ALL SYSTEMS. NOTE: THESE DRAWINGS ARE FOR CONCEPTUAL PURPOSES AND DO NOT REFLECT ANY
LOCAL PREFERENCES OR REGULATIONS. PLEASE CONTACT YOUR LOCAL CONTECH REP FOR MODIFICATIONS. DYODS - 4524-1-0 PROJECT NAME: Alpine Chalet Apartments Rexburg, ID DESCRIPTION: OPTION 1
BACKFILL DETAIL SCALE: N.T.S. DYODS CHECKED: DRAWN: DYODS DESIGNED: APPROVED: C:\DYODS\DATA\CPC\DYODS_4524-1.DWG 7/28/2017 3:42 AM SHEET NO.: 7/28/2017 DATE:PROJECT No.: 4524-1 SEQ.
No.: 0 D3 CONTECH DRAWING DYODS 800-338-1122 513-645-7000 513-645-7993 FAX REVISION DESCRIPTIONDATE BY CONSTRUCTION LOADS FOR TEMPORARY CONSTRUCTION
VEHICLE LOADS, AN EXTRA AMOUNT 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, INCHES 18-50 MINIMUM COVER (FT)
AXLE LOADS (kips) 50-75 75-110 110-150 12-42 2.0 2.5 3.0 3.0 4.03.53.048-72 3.0 3.078-120 3.5 4.0 4.0 4.54.54.0126-144 3.5 *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. FINISHED GRADE TEMPORARY COVER FOR CONSTRUCTION LOADS HEIGHT OF COVER SCOPE THIS SPECIFICATION COVERS THE MANUFACTURE AND INSTALLATION OF THE DESIGNED DETENTION SYSTEM DETAILED
IN THE PROJECT PLANS. MATERIAL THE MATERIAL SHALL CONFORM TO THE APPLICABLE REQUIREMENTS LISTED BELOW: ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE APPLICABLE REQUIREMENTS OF
AASHTO M-274 OR ASTM A-92. THE GALVANIZED STEEL COILS SHALL CONFORM TO THE APPLICABLE REQUIREMENTS OF AASHTO M-218 OR ASTM A-929. THE POLYMER COATED STEEL COILS SHALL CONFORM TO THE
APPLICABLE REQUIREMENTS OF AASHTO M-246 OR ASTM A-742. THE ALUMINUM COILS SHALL CONFORM TO THE APPLICABLE REQUIREMENTS OF AASHTO M-197 OR ASTM B-744. CONSTRUCTION LOADS CONSTRUCTION
LOADS MAY BE HIGHER THAN FINAL LOADS. FOLLOW THE MANUFACTURER'S OR NCSPA GUIDELINES. PIPE THE PIPE SHALL BE MANUFACTURED IN ACCORDANCE TO THE APPLICABLE REQUIREMENTS LISTED BELOW: ALUMINIZED
TYPE 2: AASHTO M-36 OR ASTM A-760 GALVANIZED: AASHTO M-36 OR ASTM A-760 POLYMER COATED: AASHTO M-245 OR ASTM A-762 ALUMINUM: AASHTO M-196 OR ASTM B-745 HANDLING AND ASSEMBLY SHALL
BE IN ACCORDANCE WITH NCSP'S (NATIONAL CORRUGATED STEEL PIPE ASSOCIATION) FOR ALUMINIZED TYPE 2, GALVANIZED OR POLYMER COATED STEEL. SHALL BE IN ACCORDANCE WITH THE MANUFACTURER'S
RECOMMENDATIONS FOR ALUMINUM PIPE. INSTALLATION SHALL BE IN ACCORDANCE WITH AASHTO STANDARD SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II DIVISION II OR ASTM A-798 (FOR
ALUMINIZED TYPE 2, GALVANIZED OR POLYMER COATED STEEL) OR ASTM 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. IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. SPECIFICATION
FOR DESIGNED DETENTION SYSTEM: 8" 11" TYP. 2" 1" GAP (TYP. ALL SIDES) NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION. 2. DESIGN LOAD HS25. 3. EARTH COVER = 1' MAX. 4.
CONCRETE STRENGTH = 3,500 psi 5. REINFORCING STEEL = ASTM A615, GRADE 60. 6. PROVIDE ADDITIONAL REINFORCING AROUND OPENINGS EQUAL TO THE BARS INTERRUPTED, HALF EACH SIDE. ADDITIONAL
BARS TO BE IN THE SAME PLANE. A A 2" COVER (TYP) SECTION VIEW ROUND OPTION PLAN VIEW SQUARE OPTION PLAN VIEW &035,6(5 INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. STANDARD REINFORCING,
SEE TABLE OPENING IN PROTECTION SLAB FOR CASTING #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), SEE NOTE 7. $ INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. % OPENING IN PROTECTION SLAB FOR CASTING
#4 DIAGONAL TRIM BAR (TYP. 4 PLACES), SEE NOTE 7. STANDARD REINFORCING, SEE TABLE GASKET MATERIAL SUFFICIENT TO PREVENT SLAB FROM BEARING ON RISER TO BE PROVIDED BY CONTRACTOR. 2" COVER
(TYP.) % ACCESS CASTING TO BE PROVIDED AND INSTALLED BY CONTRACTOR. REINFORCING TABLE &03 RISER A % REINFORCING **BEARING PRESSURE (PSF) 24"
4'X4' 26" #5 @ 12" OCEW #5 @ 12" OCEW 2,410 1,780 30"
4'-6" X 4'-6" 32" #5 @ 12" OCEW #5 @ 12" OCEW 2,120 1,530 36"
5' X 5' 38" #5 @ 10" OCEW #5 @ 10" OCEW 1,890 1,350 42"
5'-6" X 5'-6" 44" #5 @ 10" OCEW #5 @ 9" OCEW 1,720 1,210 48"
6' X 6' 50" #5 @ 9" OCEW #5 @ 8" OCEW 1,600 1,100 ** ASSUMED SOIL BEARING CAPACITY 1'-0" A 2" COVER (TYP.) 2" COVER (TYP) 7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND BARS A MINIMUM
OF 12" BEYOND OPENING, BEND BARS AS REQUIRED TO MAINTAIN BAR COVER. 8. PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED BY CONTRACTOR. 9. DETAIL DESIGN BY DELTA
ENGINEERING, BINGHAMTON, NY. % The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions
LLC ("Contech"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done
at the user's own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based
and actual field conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no
liability for designs based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com NOTE: THESE DRAWINGS ARE FOR CONCEPTUAL PURPOSES AND DO NOT REFLECT
ANY LOCAL PREFERENCES OR REGULATIONS. PLEASE CONTACT YOUR LOCAL CONTECH REP FOR MODIFICATIONS. DYODS - 4524-1-0 PROJECT NAME: Alpine Chalet Apartments Rexburg, ID DESCRIPTION: OPTION
1 MANHOLE CAP DETAIL SCALE: N.T.S. CONSTRUCTION LOADING DIAGRAM SCALE: N.T.S. DYODS CHECKED: DRAWN: DYODS DESIGNED: APPROVED: C:\DYODS\DATA\CPC\DYODS_4524-1.DWG 7/28/2017 3:42 AM SHEET
NO.: 7/28/2017 DATE:PROJECT No.: 4524-1 SEQ. No.: 0 D4 CONTECH DRAWING DYODS 800-338-1122 513-645-7000 513-645-7993 FAX REVISION DESCRIPTIONDATE BY
The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech"). Neither this
drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's own risk and
Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions
are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs based
on missing, incomplete or inaccurate information supplied by others. www.ContechES.com CMP DETENTION INSTALLATION GUIDE PROPER INSTALLATION OF A FLEXIBLE UNDERGROUND DETENTION SYSTEM
WILL ENSURE LONG-TERM PERFORMANCE. THE CONFIGURATION OF THESE SYSTEMS OFTEN REQUIRES SPECIAL CONSTRUCTION PRACTICES THAT DIFFER FROM CONVENTIONAL FLEXIBLE PIPE CONSTRUCTION. CONTECH
ENGINEERED SOLUTIONS STRONGLY SUGGESTS SCHEDULING A PRE-CONSTRUCTION MEETING WITH YOUR LOCAL SALES ENGINEER TO DETERMINE IF ADDITIONAL MEASURES, NOT COVERED IN THIS GUIDE, ARE APPROPRIATE
FOR YOUR SITE. FOUNDATION CONSTRUCT A FOUNDATION THAT CAN SUPPORT THE DESIGN LOADING APPLIED BY THE PIPE AND ADJACENT BACKFILL WEIGHT AS WELL AS MAINTAIN ITS INTEGRITY DURING CONSTRUCTION.
IF SOFT OR UNSUITABLE SOILS ARE ENCOUNTERED, REMOVE THE POOR SOILS DOWN TO A SUITABLE DEPTH AND THEN BUILD UP TO THE APPROPRIATE ELEVATION WITH A COMPETENT BACKFILL MATERIAL. THE STRUCTURAL
FILL MATERIAL GRADATION SHOULD NOT ALLOW THE MIGRATION OF FINES, WHICH CAN CAUSE SETTLEMENT OF THE DETENTION SYSTEM OR PAVEMENT ABOVE. IF THE STRUCTURAL FILL MATERIAL IS NOT COMPATIBLE
WITH THE UNDERLYING SOILS AN ENGINEERING FABRIC SHOULD BE USED AS A SEPARATOR. IN SOME CASES, USING A STIFF REINFORCING GEOGRID REDUCES OVER EXCAVATION AND REPLACEMENT FILL QUANTITIES.
GRADE THE FOUNDATION SUBGRADE TO A UNIFORM OR SLIGHTLY SLOPING GRADE. IF THE SUBGRADE IS CLAY OR RELATIVELY NON-POROUS AND THE CONSTRUCTION SEQUENCE WILL LAST FOR AN EXTENDED PERIOD
OF TIME, IT IS BEST TO SLOPE THE GRADE TO ONE END OF THE SYSTEM. THIS WILL ALLOW EXCESS WATER TO DRAIN QUICKLY, PREVENTING SATURATION OF THE SUBGRADE. BEDDING A 4 TO 6-INCH THICK, WELL-GRADED,
GRANULAR MATERIAL IS THE PREFERRED PIPE BEDDING. IF CONSTRUCTION EQUIPMENT WILL OPERATE FOR AN EXTENDED PERIOD OF TIME ON THE BEDDING, USE EITHER AN ENGINEERING FABRIC OR A STIFF GEOGRID
TO ENSURE THE BASE MATERIAL MAINTAINS ITS INTEGRITY. USING AN OPEN-GRADED BEDDING MATERIAL IS ACCEPTABLE; HOWEVER, AN ENGINEERING FABRIC SEPARATOR IS REQUIRED BETWEEN THE BASE AND THE
SUBGRADE. GRADE THE BASE TO A SMOOTH, UNIFORM GRADE TO ALLOW FOR THE PROPER PLACEMENT OF THE PIPE. IN-SITU TRENCH WALL IF EXCAVATION IS REQUIRED, THE TRENCH WALL NEEDS TO BE CAPABLE
OF SUPPORTING THE LOAD THAT THE PIPE SHEDS AS THE SYSTEM IS LOADED. IF SOILS ARE NOT CAPABLE OF SUPPORTING THESE LOADS, THE PIPE CAN DEFLECT. PERFORM A SIMPLE SOIL PRESSURE CHECK
USING THE APPLIED LOADS TO DETERMINE THE LIMITS OF EXCAVATION BEYOND THE SPRING LINE OF THE OUTER MOST PIPES. IN MOST CASES THE REQUIREMENTS FOR A SAFE WORK ENVIRONMENT AND PROPER BACKFILL
PLACEMENT AND COMPACTION TAKE CARE OF THIS CONCERN. BACKFILL MATERIAL TYPICALLY, THE BEST BACKFILL MATERIAL IS AN ANGULAR, WELL-GRADED, GRANULAR FILL MEETING THE REQUIREMENTS OF AASHTO
A-1, A-2 OR A-3. IN SOME CASES, IT MAY BE DESIRABLE TO USE A UNIFORMLY GRADED MATERIAL FOR THE FIRST 18- TO 24-INCHES. THIS TYPE OF MATERIAL IS EASIER TO PLACE UNDER THE HAUNCHES OF
THE PIPE AND REQUIRES LITTLE COMPACTIVE EFFORT. DEPENDING ON THE BEDDING MATERIAL, A SEPARATION GEOTEXTILE MIGHT BE REQUIRED ABOVE AND BELOW THESE INITIAL LIFTS. OPEN-GRADED FILL IS
TYPICALLY NOT USED BEYOND THE INITIAL 18- TO 24-INCHES BECAUSE THIS TYPE OF FILL OFTEN DOES NOT PROVIDE ADEQUATE CONFINING RESTRAINT TO THE PIPES. IF A UNIFORMLY GRADED MATERIAL (PARTICLES
ALL ONE SIZE) IS USED, INSTALL A GEOTEXTILE SEPARATION FABRIC TO PREVENT THE MIGRATION OF FINES INTO THE BACKFILL. %$&.),//86,1*&21752//('/2:675(1*7+0$7(5,$/
&/6025³)/2:$%/( ),//´
:+(17+(63$&,1*%(7:((17+(3,3(6:,//127$//2:)25 PLACEMENT AND ADEQUATE COMPACTION OF THE BACKFILL. WORK CLOSELY WITH THE LOCAL CONTECH SALES ENGINEER REGARDING THE SPECIAL INSTALLATION
TECHNIQUES REQUIRED WHEN USING CLSM. BACKFILL PLACEMENT PLACE BACKFILL IN 8-INCH LOOSE LIFTS AND COMPACT TO 90% AASHTO T99 STANDARD PROCTOR DENSITY. MATERIAL SHALL BE WORKED INTO THE
PIPE HAUNCHES BY MEANS OF SHOVEL-SLICING, RODDING, AIR TAMPER, VIBRATORY ROD, OR OTHER EFFECTIVE METHODS. IF AASHTO T99 PROCEDURES ARE DETERMINED INFEASIBLE BY THE GEOTECHNICAL ENGINEER
OF RECORD, COMPACTION IS CONSIDERED ADEQUATE WHEN NO FURTHER YIELDING OF THE MATERIAL IS OBSERVED UNDER THE COMPACTOR, OR UNDER FOOT, AND THE GEOTECHNICAL ENGINEER OF RECORD (OR REPRESENTATIVE
THEREOF) IS SATISFIED WITH THE LEVEL OF COMPACTION. FOR LARGE SYSTEMS, CONVEYOR SYSTEMS, BACKHOES WITH LONG REACHES OR DRAGLINES WITH STONE BUCKETS MAY BE USED TO PLACE BACKFILL. ONCE
MINIMUM COVER FOR CONSTRUCTION LOADING ACROSS THE ENTIRE WIDTH OF THE SYSTEM IS REACHED, ADVANCE THE EQUIPMENT TO THE END OF THE RECENTLY PLACED FILL, AND BEGIN THE SEQUENCE AGAIN UNTIL
THE SYSTEM IS COMPLETELY BACKFILLED. THIS TYPE OF CONSTRUCTION SEQUENCE PROVIDES ROOM FOR STOCKPILED BACKFILL DIRECTLY BEHIND THE BACKHOE, AS WELL AS THE MOVEMENT OF CONSTRUCTION TRAFFIC.
MATERIAL STOCKPILES ON TOP OF THE BACKFILLED DETENTION SYSTEM SHOULD BE LIMITED TO 8- TO 10-FEET HIGH AND MUST PROVIDE BALANCED LOADING ACROSS ALL BARRELS. TO DETERMINE THE PROPER COVER
OVER THE PIPES TO ALLOW THE MOVEMENT OF CONSTRUCTION EQUIPMENT SEE TABLE 1, OR CONTACT YOUR LOCAL CONTECH SALES ENGINEER. WHEN FLOWABLE FILL IS USED, YOU MUST PREVENT PIPE FLOATATION.
TYPICALLY, SMALL LIFTS ARE PLACED BETWEEN THE PIPES AND THEN ALLOWED TO SET-UP PRIOR TO THE PLACEMENT OF THE NEXT LIFT. THE ALLOWABLE THICKNESS OF THE CLSM LIFT IS A FUNCTION OF A
PROPER BALANCE BETWEEN THE UPLIFT FORCE OF THE CLSM, THE OPPOSING WEIGHT OF THE PIPE, AND THE EFFECT OF OTHER RESTRAINING MEASURES. THE PIPE CAN CARRY LIMITED FLUID PRESSURE WITHOUT
PIPE DISTORTION OR DISPLACEMENT, WHICH ALSO AFFECTS THE CLSM LIFT THICKNESS. YOUR LOCAL CONTECH SALES ENGINEER CAN HELP DETERMINE THE PROPER LIFT THICKNESS. CONSTRUCTION LOADING TYPICALLY,
THE MINIMUM COVER SPECIFIED FOR A PROJECT ASSUMES H-20 LIVE LOAD. BECAUSE CONSTRUCTION LOADS OFTEN EXCEED DESIGN LIVE LOADS, INCREASED TEMPORARY MINIMUM COVER REQUIREMENTS ARE NECESSARY.
SINCE CONSTRUCTION EQUIPMENT VARIES FROM JOB TO JOB, IT IS BEST TO ADDRESS EQUIPMENT SPECIFIC MINIMUM COVER REQUIREMENTS WITH YOUR LOCAL CONTECH SALES ENGINEER DURING YOUR PRE-CONSTRUCTION
MEETING. ADDITIONAL CONSIDERATIONS BECAUSE MOST SYSTEMS ARE CONSTRUCTED BELOW-GRADE, RAINFALL CAN RAPIDLY FILL THE EXCAVATION; POTENTIALLY CAUSING FLOATATION AND MOVEMENT OF THE PREVIOUSLY
PLACED PIPES. TO HELP MITIGATE POTENTIAL PROBLEMS, IT IS BEST TO START THE INSTALLATION AT THE DOWNSTREAM END WITH THE OUTLET ALREADY CONSTRUCTED TO ALLOW A ROUTE FOR THE WATER TO ESCAPE.
TEMPORARY DIVERSION MEASURES MAY BE REQUIRED FOR HIGH FLOWS DUE TO THE RESTRICTED NATURE OF THE OUTLET PIPE. 1 2 3 4 5 678910 1514131211 GEOGRID WASN'T USED GEOGRID UNDERCUT AND REPLACE
UNSUITABLE SOILS EMBANKMENT GEOGRID USED TO REDUCE THE AMOUNT OF UNDERCUT BEDDING COVER EMBANKMENTBEDDING - WELL GRADED GRANULAR AND SMALLER IN-SITU TRENCHWALL 1 2" PER FOOT OF COVER
OR 4" MIN. EMBANKMENT LIVE LOAD BEDDING - WELL GRADED GRANULAR AND SMALLER BACKFILL - WELL GRADED 3 4" GRANULAR AND SMALLER GEOTEXTILE SEPARATION (ABOVE AND BELOW BEDDING) WITH UNIFORMLY
GRADED BEDDING LAYER. PIPE A PIPE B PIPE C PIPE D BEDDING8" LOOSE LIFTS EMBANKMENT MAXIMUM UNBALANCE LIMITED TO 2 LIFTS (APPROX. 16") EMBANKMENT TYPICAL BACKFILL SEQUENCE EMBANKMENT
PAVED PARKING LOT STAGE POURS AS REQUIRED TO CONTROL FLOATATION AND PIPE DISTORTION/DISPLACEMENT CLSM WEIGHTED PIPE WITH MOBILE CONCRETE BARRIERS (OR OTHER REMOVABLE WEIGHTS) BACKFILL
CATCH BASIN INLET WATER WATER WATER ELEVATION IN DETENTION SYSTEM FINISHED FUNCTIONING SYSTEM OUTLET CONTROL CMP DETENTION SYSTEM INSPECTION AND MAINTENANCE UNDERGROUND STORMWATER DETENTION
AND INFILTRATION SYSTEMS MUST BE INSPECTED AND MAINTAINED AT REGULAR INTERVALS FOR PURPOSES OF PERFORMANCE AND LONGEVITY. INSPECTION INSPECTION IS THE KEY TO EFFECTIVE MAINTENANCE OF
CMP DETENTION SYSTEMS AND IS EASILY PERFORMED. CONTECH RECOMMENDS ONGOING, QUARTERLY INSPECTIONS. THE RATE AT WHICH THE SYSTEM COLLECTS POLLUTANTS WILL DEPEND MORE ON SITE SPECIFIC
ACTIVITIES RATHER THAN THE SIZE OR CONFIGURATION OF THE SYSTEM. INSPECTIONS SHOULD BE PERFORMED MORE OFTEN IN EQUIPMENT WASHDOWN AREAS, IN CLIMATES WHERE SANDING AND/OR SALTING OPERATIONS
TAKE PLACE, AND IN OTHER VARIOUS INSTANCES IN WHICH ONE WOULD EXPECT HIGHER ACCUMULATIONS OF SEDIMENT OR ABRASIVE/ CORROSIVE CONDITIONS. A RECORD OF EACH INSPECTION IS TO BE MAINTAINED
FOR THE LIFE OF THE SYSTEM MAINTENANCE CMP DETENTION SYSTEMS SHOULD BE CLEANED WHEN AN INSPECTION REVEALS ACCUMULATED SEDIMENT OR TRASH IS CLOGGING THE DISCHARGE ORIFICE. ACCUMULATED
SEDIMENT AND TRASH CAN TYPICALLY BE EVACUATED THROUGH THE MANHOLE OVER THE OUTLET ORIFICE. IF MAINTENANCE IS NOT PERFORMED AS RECOMMENDED, SEDIMENT AND TRASH MAY ACCUMULATE IN FRONT
OF THE OUTLET ORIFICE. MANHOLE COVERS SHOULD BE SECURELY SEATED FOLLOWING CLEANING ACTIVITIES. CONTECH SUGGESTS THAT ALL SYSTEMS BE DESIGNED WITH AN ACCESS/INSPECTION MANHOLE SITUATED
AT OR NEAR THE INLET AND THE OUTLET ORIFICE. SHOULD IT BE NECESSARY TO GET INSIDE THE SYSTEM TO PERFORM MAINTENANCE ACTIVITIES, ALL APPROPRIATE PRECAUTIONS REGARDING CONFINED SPACE
ENTRY AND OSHA REGULATIONS SHOULD BE FOLLOWED. SYSTEMS ARE TO BE RINSED, INCLUDING ABOVE THE SPRING LINE, ANNUALLY SOON AFTER THE SPRING THAW, AND AFTER ANY ADDITIONAL USE OF SALTING
AGENTS, AS PART OF THE MAINTENANCE PROGRAM FOR ALL SYSTEMS WHERE SALTING AGENTS MAY ACCUMULATE INSIDE THE PIPE. MAINTAINING AN UNDERGROUND DETENTION OR INFILTRATION SYSTEM IS EASIEST
WHEN THERE IS NO FLOW ENTERING THE SYSTEM. FOR THIS REASON, IT IS A GOOD IDEA TO SCHEDULE THE CLEANOUT DURING DRY WEATHER. THE FOREGOING INSPECTION AND MAINTENANCE EFFORTS HELP ENSURE
UNDERGROUND PIPE SYSTEMS USED FOR STORMWATER STORAGE CONTINUE TO FUNCTION AS INTENDED BY IDENTIFYING RECOMMENDED REGULAR INSPECTION AND MAINTENANCE PRACTICES. INSPECTION AND MAINTENANCE
RELATED TO THE STRUCTURAL INTEGRITY OF THE PIPE OR THE SOUNDNESS OF PIPE JOINT CONNECTIONS IS BEYOND THE SCOPE OF THIS GUIDE. DYODS - 4524-1-0 PROJECT NAME: Alpine Chalet Apartments
Rexburg, ID DESCRIPTION: OPTION 1 GEOMEMBRANE BARRIER A SITE'S RESISTIVITY MAY CHANGE OVER TIME WHEN VARIOUS TYPES OF SALTING AGENTS ARE USED, SUCH AS ROAD SALTS FOR DEICING AGENTS.
IF SALTING AGENTS ARE USED ON OR NEAR THE PROJECT SITE, A GEOMEMBRANE BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL
ADVERSE EFFECTS THAT MAY RESULT FROM THE USE OF SUCH AGENTS INCLUDING PREMATURE CORROSION AND REDUCED ACTUAL SERVICE LIFE. THE PROJECT'S ENGINEER OF RECORD IS TO EVALUATE WHETHER SALTING
AGENTS WILL BE USED ON OR NEAR THE PROJECT SITE, AND USE HIS/HER BEST JUDGEMENT TO DETERMINE IF ANY ADDITIONAL PROTECTIVE MEASURES ARE REQUIRED. BELOW IS A TYPICAL DETAIL SHOWING THE
PLACEMENT OF A GEOMEMBRANE BARRIER FOR PROJECTS WHERE SALTING AGENTS ARE USED ON OR NEAR THE PROJECT SITE. 7%' TBD" TYP. TBD" TYP. LIMITS OF REQUIRED BACKFILL 20 MIL PE IMPERMEABLE
LINER OVER TOP OF PIPE
)25
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