DIVISION 4300 STORM DRAINAGE SECTION 4305 STORM SEWER PART 1 - GENERAL 1.01 SCOPE This section covers the construction of storm sewers for the collection and transport of stormwater runoff. 1.02 REFERENCES A. KC-APWA: 1. Section 2600 Storm Sewers B. KDOT Standard Specifications: 1. Division 1900 Culvert, Sewer, and Underdrain Pipe C. AASHTO: 1. M 294 Standard Specification for Corrugated PE pipe D. ASTM: 1. A 185 Standard Specification for Steel Welded Wire Fabric, Plain, for Concrete 2. C 33 Standard Specification for Concrete Aggregates 3. C 76 Standard Specification for Reinforced Concrete Culvert, Storm Drain and Sewer Pipe 4. C 506 Standard Specification for Reinforced Concrete Arch Culvert, Storm Drain and Sewer Pipe 5. C 507 Standard Specification for Reinforced Concrete Elliptical Culvert, Storm Drain and Sewer Pipe 6. C 1433 Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains and Sewers 7. C 1619 Standard Specification for Elastomeric Seals for Joining Concrete Structures 8. C 1628 Standard Specification for Joints for Concrete Gravity Flow Sewer Pipe, Using Rubber Gaskets 9. D 2321 Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity Flow Applications 10. D 3212 Standard Specification for Joints and Sewer Plastic Pipes Using Flexible Elastomeric Seals 11. D 3350 Standard Specification for Polyethylene Plastic Pipes and Fitting Materials 12. F 477 - Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe Division 4300 Storm Drainage 4305-1
13. F 2306 Standard Specification for 12 to 60 inch Annular Corrugated Profile-Wall Polyethylene (PE) Pipe and Fittings for Gravity-Flow Storm Sewer and Subsurface Drainage Applications 14. F 2736 Standard Specification for 6 to 30 in. Polypropylene Corrugated Single Wall Pipe and Double Wall Pipe 15. F 2764 Standard Specification for 30 to 60 in. Polypropylene Triple Wall Pipe and Fittings for Non-Pressure Sanitary Sewer Applications 16. F 2881 Standard Specifications for 12 to 60 in. Polypropylene Dual Wall Pipe and Fittings for Non-Pressure Storm Sewer Applications 1.03 ADMINISTRATIVE REQUIREMENTS A. Public Storm System: The City of Shawnee requires RCP (reinforced concrete pipe) or Polypropylene (PP) to be used for all public storm systems. RCP shall be used for all public storm systems within rights-of-way. This includes storm pipe installed under pavement or generally parallel to pavement. PP may be used to connect a public storm system located outside of the rights-of-way to a storm system within the rights-of-way. High Density Polyethylene (HDPE) shall not be used on public storm systems. B. Private Storm System: RCP, HDPE, and PP may be used on private storm systems at the discretion of the Owner; however, only RCP or PP shall be used for the connection between the private storm system and the public drainage structure, if the connection is within the rights-of-way. 1.04 QUALITY ASSURANCE A. RCP shall not be delivered to the work site until concrete control cylinders representing such pipe have attained a compressive strength of at least eighty percent (80%) of the specified 28-day strength. Upon request by the Engineer, Contractor shall supply certification of strength test. B. HDPE and PP products shall have the manufacturer s certification submitted to the Engineer. PART 2 - PRODUCTS 2.01 REINFORCED CONCRETE PIPE (RCP) A. RCP: RCP shall be Class III with a wall thickness not less than Wall B, unless otherwise specified within the Construction Documents. All pipes shall conform to the following ASTM standards: 1. Round: ASTM C 76 2. Elliptical: ASTM C 507 3. Arch: ASTM C 506 B. Lift Holes: Concrete pipe shall not have lift holes for installation. C. Markings: Pipes and fittings shall be permanently marked as follows: 1. Pipe class and nominal size Division 4300 Storm Drainage 4305-2
2. Date of manufacture 3. Manufacturer s name and/or trademark 4. Amount of miter and point of maximum miter (if applicable) D. Reinforcement: Reinforcement shall be full-circle type. Elliptical or part-circle reinforcement shall not be used. E. Joints: Rubber gasket joints conforming to ASTM C 1628 shall be used for all round pipe. Mastic joints shall be used for all other pipe shapes. F. Sections: Each section of pipe shall not be less than eight (8) feet long for pipe diameters forty-eight (48) inches or less and shall not be less than six (6) feet long for pipe diameters larger than forty-eight (48) inches. 2.02 POLYPROPYLENE (PP) A. Pipe: Polypropylene compound shall be impact modified copolymer meeting the following ASTM requirements: 1. 12- to 30-inch polypropylene pipe shall meet the requirements of ASTM F2736. Pipe shall be smooth interior and annular exterior corrugations. 2. 30- to 60-inch polypropylene pipe shall meet the requirements of ASTM F2764. Pipe shall be smooth interior and exterior with annular inner corrugations. B. Joints: Joints shall be a gasketed integral bell and spigot connection, meeting the requirements of ASTM F2736 or ASTM F2764. Joints shall be watertight according to the requirements of ASTM D3212. Spigot shall have two gaskets meeting the requirements of ASTM F477. Gaskets shall be installed by the pipe manufacturer and covered with a removable, protective wrap to ensure the gaskets are free from debris. A joint lubricant shall be used on the gasket and bell during assembly. C. Fittings: Fittings shall conform to ASTM F2736 or ASTM F2764. Bell and spigot connections shall utilize a spun-on, welded or integral bell and spigot with gaskets meetings ASTM F477. Fitting joints shall meet the watertight joint performance requirements of ASTM D3212. Only fittings supplied or recommended by the manufacturer of the pipe shall be used. D. Certification: Pipe manufacturer shall be certified through the Plastic Pipe Institute (PPI) third party certification program. E. Markings: Pipes and fittings shall be permanently marked as follows: 1. Nominal size 2. Date of manufacture 3. Manufacturer s name and/or trademark 4. Specification designation 2.03 HIGH DENSITY POLYETHYLENE PIPE (HDPE) A. Pipe: HDPE pipe and fittings shall conform to ASTM F2306 and AASHTO M294. Pipe shall be virgin PE compounds, which conform to the requirements of cell class 435400C in the latest edition of ASTM D3350. B. Joints: Joints shall consist of integral bell and spigot with rubber gaskets that meet ASTM F477. The bell shall span over three (3) spigot corrugations. Division 4300 Storm Drainage 4305-3
C. Water-Tight Joints: Water tight joints shall meet a 10.8 psi laboratory test in accordance with ASTM D3212. D. Fittings: Fittings shall meet the requirements of AASHTO M294 and ASTM F2306. Fittings may be either molded or fabricated. Only fittings supplied or recommended by the manufacturer of the pipe shall be used. E. Certification: Pipe manufacturer shall be certified through the Plastic Pipe Institute (PPI) third party certification program. F. Markings: Pipes and fittings shall be permanently marked as follows: 1. Nominal size 2. Date of manufacture 3. Manufacturer s name and/or trademark 4. Specification designation 2.04 UNDERDRAIN Corrugated polyethylene tubing and drainable aggregates for underdrains shall conform to the Standard Details and KDOT Division 1900. 2.05 PIPE REPAIR AND LINING Pipe that requires repair shall be replaced with the same material as existing. The exception being that CMP pipe shall be replaced with RCP or PP. Pipe lining materials may be allowed as an alternative when recommended by the Engineer and approved by the City Engineer. Installation of pipe lining materials shall be in strict conformance with the manufacturer s recommendations. PART 3 - EXECUTION 3.01 RCP A. Cleaning: The interior of all pipe and fittings shall be thoroughly cleaned of foreign matter before being installed. All joint surfaces shall be kept clean until the jointing is completed. 1. Debris: All debris, tools, or foreign materials shall be removed from the pipe. 2. Stop Work: When construction has temporarily stopped for the day, the open end of the pipe section shall be sufficiently closed with an end board to prevent water, earth or other substance from entering the pipe. B. Handling: All pipe, fittings, end sections, and accessories shall be unloaded, stockpiled, hauled, distributed, and otherwise handled in a manner which will prevent damage. Damaged pipe shall be marked as such and shall not be used by the Contractor. C. Trenching: Refer to Section 4125 Excavation, Trenching, and Backfilling for City standard requirements. Division 4300 Storm Drainage 4305-4
D. Joints: 1. Rubber Gasket: Rubber gasket joints shall be installed in strict accordance with the manufacturer s recommendations. The position and conditions of the rubber gasket shall be checked with a feeler gauge after the piping unit is installed 2. Mastic: Mastic joints shall be constructed to attain a watertight joint. Sufficient mastic shall be applied so as to completely fill any space between the spigot end of one pipe and the bell end of the adjoining pipe. In laying pipe, the maximum mastic joint opening shall not exceed the manufacturers recommendations, or the following table, whichever is less. Pipe Size (Round Equivalent) Maximum Joint Opening 15 to 24 1/4 27 to 84 1/2 90 and larger 3/4 The above maximum openings are for the purpose of compensating for minor irregularities in the manufacture of the pipe joints. The pipe is to be laid to line and grade so that the sections are pushed completely home at least at one point around the circumference of the joint, without spalling the concrete. Permissible joint openings may exist at other points around the circumference of the pipe. Mastic shall only be applied to pipe that is to be installed the same day. If the pipe is not installed the same day the mastic is applied, the mastic shall be removed and replaced with a fresh mastic coating prior to installation. E. Installation: 1. Protection: Pipe shall be protected during installation against shock and free fall, and shall be installed without cracking, chipping, breaking, bending, or damage to coating materials. Damaged materials shall be replaced with new materials. 2. Pipe Laying: Pipe laying shall proceed from the downstream end of the project with bell ends facing upstream. All pipe shall be laid with ends abutting and true to line and grade as shown within the Construction Documents. 3. Grade Control: Alignment and grade shall be uniform between structures, and an accurate/reliable system of grade control shall be used for maintaining alignment. F. Bedding: Pipe installation and bedding shall be in strict conformance with City Standard Details. Pipe shall be placed so that the barrel and length of pipe have full support of the bedding material. G. Backfill: Backfilling of trench shall be in strict conformance with Section 4125 Excavation Trenching, and Backfilling. 3.02 POLYPROPYLENE A. Handling: All pipe, pipe fittings, and accessories shall be unloaded, stockpiled, hauled, distributed, and otherwise handled in a manner which will prevent damage. B. Cleaning: The interior surfaces of all pipes shall be thoroughly cleaned of all foreign matter before being lowered in the trenches and shall be kept clean during the laying operations. 1. Debris: All debris, tools, or foreign materials shall be removed from the pipe. Division 4300 Storm Drainage 4305-5
2. Stop Work: When construction has temporarily stopped for the day, the open end of the pipe section shall be sufficiently closed with an end board to prevent water, earth or other substance from entering the pipe. C. Trenching: Refer to Section 4125 Excavation, Trenching, and Backfilling for City standard requirements. D. Installation: PP pipe shall be installed per ASTM D2321, the manufacturer s specification, and in accordance with the Standard Details. In case of a discrepancy between the requirements, the more restrictive shall govern. 1. Grade Control: Alignment and grade shall be uniform between structures, and a reliable system of grade control shall be used for maintaining alignment. 2. PP pipe shall be laid with the separate sections jointed firmly together, with outside laps of the circumferential joints pointing upstream, and the center line of the invert coinciding with the specified alignment of the pipe. 3. The minimum cover over PP pipes larger than twenty-four (24) inches in diameter shall be two (2) feet. 4. Joints shall be seated per manufacturer s recommendation to attain a watertight joint. E. Deflection: If required by the City Engineer, the Contractor is responsible for verifying the deflection of the pipe. The maximum pipe deflection allowed is five (5) percent. Time of measurement shall be not less than thirty (30) days or more than sixty (60) days following installation. Deflections in excess of five percent (5%) may require the pipe to be removed and new pipe installed. F. Backfill: Backfilling a trench shall be in strict conformance with Section 4125 Excavation, Trenching, and Backfilling. 3.03 HDPE A. Handling: All pipe, pipe fittings, and accessories shall be unloaded, stockpiled, hauled, distributed, and otherwise handled in a manner which will prevent damage. B. Cleaning: The interior surfaces of all pipes shall be thoroughly cleaned of all foreign matter before being lowered in the trenches and shall be kept clean during the laying operations. C. Trenching: Refer to Section 4125 Excavation, Trenching, and Backfilling for City standard requirements. D. Installation: HDPE pipe shall be installed per ASTM D2321 and the manufacturer s specification. In case of a discrepancy between the two requirements, the more restrictive shall govern. 1. Grade Control: Alignment and grade shall be uniform between structures, and a reliable system of grade control shall be used for maintaining alignment. 2. HDPE pipe shall be laid with the separate sections jointed firmly together, with outside laps of the circumferential joints pointing upstream, and the center line of the invert coinciding with the specified alignment of the pipe. 3. The minimum cover over HDPE pipes larger than twenty-four (24) inches in diameter shall be two (2) feet. 4. Joints shall be seated per manufacturer s recommendation to attain a watertight joint. E. Deflection: If required by the City Engineer, the Contractor is responsible for verifying the deflection of the pipe. The maximum pipe deflection allowed is five percent (5%). Time of Division 4300 Storm Drainage 4305-6
measurement shall be not less than thirty (30) days or more than sixty (60) days following installation. Deflections in excess of five percent (5%) may require the pipe to be removed and new pipe installed. F. Backfill: Backfilling a trench shall be in strict conformance with Section 4125 Excavation, Trenching, and Backfilling. 3.04 CONCRETE ENCASEMENT Concrete encasements shall be in strict conformance with the Standard Details. 3.05 ALIGNMENT TESTING To verify alignment and workmanship, installed pipe shall be televised by the City at any time during the maintenance period. Televised pipe shall be inspected for a smooth, structurally sound, straight main. Unacceptable defects include, but are not limited to, displacement at joints, intrusion of foreign material, cracked and distressed pipe, and exposed reinforcing steel. Pipe not passing alignment tests shall be repaired and/or replaced and retested at the Contractor s expense. PART 4 - MEASUREMENT AND PAYMENT 4.01 PIPE A. Method of Measurement: Field Measured. B. Unit: Linear foot. The pipe shall be measured to the inside face of the structure and to pipe pay length at end sections per Standard Details. C. Payment: Payment shall be made at the Contract unit price. All fittings, joints, gaskets, trenching, excavating, and other appurtenant work shall be considered subsidiary to the unit price of pipe. 4.02 END SECTIONS A. Method of Measurement: Field Measured. B. Unit: Per each. C. Payment: Payment shall be made at the Contract unit price. 4.03 CONCRETE PIPE ENCASEMENT A. Method of Measurement: Field Measured. B. Unit: Linear foot of pipe encased. C. Payment: Payment shall be made at the Contract unit price. END OF SECTION Division 4300 Storm Drainage 4305-7