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HomeMy WebLinkAbout42-96.22w y .4 i i SECTION 02720 - STORM SEWERS U 1. Scope of Work 16. Bac kfiiling: For a depth of at least 12 Inches above the The work under this section includes all storm sewers, storm top of the pipe. backfill with earth or granular material sewer inlets, and related items including excavating and free from large stones, rock fragments. roots or sod. Tamp �i bockfilling, necessary to complete the work shown on the this backfill thoroughly, taking care not to disturb the Plans, pipe. For the remaining trench depth, backfill with earth C6 or granular material which may contain stones or rocks not 2. Standard Speciflcations of Town /City /County of 14A_MILTON Co. larger than four (4) inches. Backfill under walks, parking INDIANA and Indiana Department of Highways Stan- Wm areas, driveways and streets shall be granular material only dard Specificotions ( IDHSS), latest edition, shall apply for and shall be thoroughly compacted by approved methods to the all work and materials. Pipe shall be installed In accord- density specified. Trenches parallel to and within five (5) _J once with Section 715 of (DHSS. All trench excavations feet of paved roadways shall be constructed the some. All � deeper than five (5) feet are covered by OSHA Standard 29OR granular backfill shall be compacted to 957E Standard Proctor CL 1926 Subpart P. p maximum dry density. 3. A. All storm sewer pipe shall be reinforced concrete pipe 17. Manhole Inverts: Construct manhole flow channels of con - conforming to ASTM Designation C -76 Class III, unless crete, sewer pipe or brick, smoothly finished and of semi - otherwise noted, in accordance with Section 906 of circular section conforming to the inside diameter of the 1DHSS. Joints shall conform to ASTM C -433, latest connecting sewers. Make changes in size or grade gradually revision. • and changes in direction by true curves. Provide such ' channels for all connecting sewers at each manholes B. Alternate pipe material may be (aluminum coated) steel. Type II material conforming to the current AASHTO M35 for pipe 18 inches and smaller with a helical corrugo- tlon of 2 -2/3" x 1/2" and AASHTO M196 for pipe 21 _ inches and larger with a helical HyFlo corrugation of 3/4" x 3/4" x 7-1/2% All CMP pipe shat) meet the following minimum gages TYPICAL SANITARY SEWER SPECIFICATIONS TO BE USED FOR PRIVATE SEWER DEVELOPMENT unless specified otherwise: WITHIN 12 Inch through 36 inch shall be 16 gage CLAY TOWNSHIP REGIONAL WASTE DISTRICT 42 Inch through 48 Inch shall be 14 gage 54 Inch through 84 inch shall be 12 gage REVI3$D OCTODER 1992 All sewers shall be Installed so as not to exceed the maximum allowable pipe strength per ASTM and monufac- turer's requirements. If additional pipe strength Is 1. Standard specifications of the Clay waste District and Indiana ` required for the probable earth live load condition, Department of Highways shall apply for all work and materials. pipe shall be installed the Contractor shall use a higher strength or bedding in accordance with Section 715. method to satisfy the conditions. 2. Sanitary sewer pipe shall be PVC in accordance with ASTM D- C. Where shown on plan, use high density Polyethylene (HOPE) Corrugated 3034 (S.D.R. 35) and ASTX 2331. PVC pipe shall have grooved pipe with smooth interior (N - 0.012). Pipe and fittings which meet or exceed the bell and gasket. The pipe shall be made of PVC plastic having a Cell classification requirements of Type III, Category 4 or 5, Grade P33 or Of 12454B. P340 Class C bedding per ASTM 01248. Joints shall be split corrugated couplings at least 7 corrugations wide 3. PVC sewer fittings shall conform to the requirements of ASTM and exceeding the soil tightness requirements of AASHTO D- 3034 -89 specification. Fittings in sizes through 8" shall standard specifications for Highway Bridges, Section 23 be molded in one piece with elastomerie Joints and minimum (2.23.3). Backfill and Installation shall comply with socket depths as specified in sections 6.2 and 7.3.2. manufacturer's recommendations. Fittings 10" and larger shall be molded. or fabricated in 4. Subdrainage system shall be installed as shown on Plana and accordance with section 7.11 with manufacturers standard pipe bells be of pipes designated in Section 906 of (DHSS as follows: and gaskets. Wall thick of fittin s shall be SDR thickness 9 26 as defined in section 7.4.1 of the specifications. Gaskets Pipes to be installed for subsurface drainage only may be for elastomerie joints shall be molded with a minimum cross - one of the following: sectional area of 0.20 square inches and conform to ASTM F- A. Perforated corrugated drainage pipe in accordance with 477 specification. Fittings shall be manufactured by Harco or equal. AASHTO M252 or AASHTO M294. PVC shall have minimum cell classification conforming to requirement of 12454 -C ASTM D -1784. 4. All sanity manholes shall be " ,, "precast in B. Concrete drain tile In accordance with AASHTO Mi78. accordance with ASTH C 478 and O Rinrcholes - O- Rings shall C. Vitrified clay the in accordance with AASHTO M179. conform to C -443. Kent Seal or equivalent shall also be applied to all joints and between riser rings and castings. More pipe is to be used for a collector of other subsurface Manhole step spacing shall be no more than 16- inches. laterals and /or sump pumps and installed with provisions for cleaning, it may be one of the following: 5. Butyl rubber coating shall be applied around each manhole A. ABS or PVC composite in accordance with ASTM D -2680. joint from 6- inches above to 6- inches below each joint. . The B. PVC In accordance with ASTM D -3034 SDR -35. appropriate primer shall be applied prior to applying the C. PVC corrugated with smooth interior in accordance with rubber coating. Inside joints to be filled with precoat plug ASTM F949. material. 5. Backfill around all structures and cuts under paved areas dnd within five (5) feet of pavement edges with granular 6. The casting elevations are not by plan. However, the castings material in accordance with Section 211 of (DHSS. are to be adjusted in the tield by the Engineer' s representative, should a discrepancy occur between plan grade 6. See standard detail sheet for construction dimensions of '- and existing grade. New manhole ring and cover shall be storm structures. Manholes, inlets and catch basins shall installed to establish grade. Maximum height of adjusting be in accordance with Section 720 of iDHSS. Precast con- rings shall be 12- inches. crete and steel for manholes and inlets shall be in accord- once with AS C -478, latest revision. Steps shall be - ductile iron or aluminum integrally coat into each catch - -- basin sidewalis. 7. Backfill around all structures and all Cuts under paved areas with granular material. Trenches opening within 5 -teat of 7. The Contractor shall provide a minimum of one (1) foot of paved roadways. shall be backfilled with granular material � n earth cover over all storm sewers. If pipe to to have construction traffic over it, Contractor shall provide a accordance with Section 211. Backfill under sidewalks minimum temporary earth cover of four (4) feet. until con- shall be granular, unless the walks are constructed a minimum struction period is complete. After completion of opera- of 6 months after backfill has been in- plaCe. tions requiring construction traffic over pipe, Contractor shall remove the temporary earth cover and grade the earth 8. The Contractor shall be responsible for verifying that all to elevations shown on the Plans. state highways, city and county permits have been obtained by 8. Rip -rap particles shall be a minimum of 6" and a maximum of the •developer prior to start of construction. 17" in size and shall be placed a minimum of 18" in depth. Dimensions for rip -rap on this plan are for estimating 9. The Contractor shall be required to furnish the developer's purposes only. Actual beat placement of rip -rap shall be Engineer with a set of prints, marked in red pencil, showing determined by field conditions and shall be in accordance actual sewer location and invert, to include lateral location, with Section 615 of (DHSS. depth and length. Such "as- built" prints roust be received by the Engineer before the final contract' payment can be 9. All drainage pipe and ditch outfaile to receiving streams authorized. The sanitary sewer laterals and. stubs termination shall be constructed try, accordance with drawings. subject shall be indicated on the surface with a metal fence post set however, to any modification required by Engineer at the time of installation is completed and to any adjustments immediately above said termination point. needed for field conditions not adequately anticipated by the design drawings. 10. All sanitary sewer lines upon completion will be required to pass an infiltration weir test and a low pressure air Castings shall be as shown on detail sheet for manufacturer, 10. unless otherwise directed by the Engineer. s test shall type and number. All castings shall be Neenah or East be conducted according to NCPI Standard Method, and shall be Jordan approved equal. Coatings shall be gray iron meeting ASTM A -48. latest revision. witnessed by an Engineer and a representative of the Clay waste District. 11. Install gaskets in accordance with manufacturer's recommen- dations for use of lubricants, cements and other special 11. Deflection testS shall be performed on all flexible* pipe installation requirements. after the final backfill has been in,place at least 30 12. le Place plugs in ends of incomplete piping at end of work day days. No pipe shall exceed a vertical deflection of 5 percent deflection test results. ( The following are considered or whenever work stops. and stubs for future development. , non - flexible pipes: concrete pipe, ductile iron pi pe and cast 13. Carry depth of trenches for piping to establish indicated iron pipe.) The deflection test shall be performed with a flow lines and Invert elevations. Notch under pipe bells nine -point mandrel. Proving rings shall be available. where applicable to provide solid bearing for entire body of pipe' 12. All mandrel testing shall be observed by a Professional 14. Trenching: Lay all pipe in open trenches, except when the Engineer for certification and a representative of the Clay local authority gives written Y 9 permission for tunneling. Waste District. Open the trench sufficiently ahead of pipe - laying to reveal any obstructions. The width of the trench shall bet the 13. The ends Of laterals are t0 be plugged tight with a braced outside pipe diameter plus nine (9) inches each side for 12 plastic disc or cap capable of withstanding .a low pressure air inches above the pipe or 0.3 x O.D.. whichever is greater. test without leakage. Sheet and brace trench as necessary to protect workmen and adjacent structures. All trenching Is to comply with Occu- pational Safety and Health Administration standards. Con- 14. Bedding for flexible pips shall be No. 8 crushed stone from the Bedding tractor shall employ a Registered Professional Engineer to design trench for 6".in� below the pipe to 12- inches above pipe. - for rigid pipe shall be NO. 8 crushed stone from 6 inches safety systems all trenches over twenty (20) feet in depth. Keep trenches free from water while below the pipe to the spring line of the pipe and from this construction is in progress. Under no circumstances toy point to 12- inches above shall be fill sand or equivalent. pipe or appurtenances in standing water. Conduct the dis- Manholes shall be placed On no 1696 than 6- inches of No. 8 charge from trench dewatering to drains or natural drainage crushed stone bedding. channels. 15. All pipes on steep slopes (over 207) shall have concrete anchor at maximum 40 feet intervals as shown on detail. 15. water and sewer line crossings and separations shall be in accordance with Ten States' Standards. 16. Trench shall be opened sufficiently ahead of pipe laying to reveal obstructions, and shall be property protected and/or barricaded when left unattended. - 17. No_wat_e_r shall be permitted to flow into the sanitary sewer system during construction. Contractor shall utilize a pump to keep the water level below the pipe. Pump discharge shall be directed to a storm outlet. Any pipe entering existing sewers shall be pluggedl'until such time as all tests on the sewers have been completed and the lines have passed all punch liStB s RB 18. All sewer laterals installed by the mainline Contractor shall be bedded the same as the main line sewer. .19. Forty -sight (48) hours notice shall be given to the Clay Regional waste District prior to the start of sewer construction. Also, 48 -hours notice shall be given prior to any testing done on the sewer. 20. Manhole castings shall be stamped "SANITARY SEWER" (Neenah Casting R 1642 or equal) and be self- sealing type. Waterproof castings shall be Neenah R- 1916 -F1 and stamped "Sanitary Sewer ". 21. The minimum slope for sewer acceptance by the Clay Township Regional Waste District are: Size of pies Min' imUn ConStrug ad lions 8 -inch 0.40% 10 -inch 0.28% 12 -inch. 0.22% 15 -inch 0. 154r 18 -inch 0.12% 22. The Contractor shall provide measurements of the slope of the sewer for each manhole section as construction progresses.- Such measurements shall be certified by a Registered Land Surveyor or Engineer and be available on -site for observation by the District's Inspector. No more than -three manhole sections can be constructed in advance of such measurements. 23. In the event the Contractor does not meet the minimum slopes, the sewer section and any other affected sewer sections shall be reconstructed to most such minimum slopes. ° XI Ln O U) 5 X 0 m 0 N M u7 N 0% CD r` U1 M i t` U � O �d U_ 0 N O N Q E..: Z N 0 N Z 00 V) ~O N w< Z M Z O U w Q w �i d C6 i-- Wm UJ O _J � CL p SHEET ; C902