SECTION 909 – DRAINAGE
909.01 Pipe Bedding
909.01.01 Class A Bedding
Use concrete as specified in 903.03.
909.01.02 Class B Bedding
Use sand or sandy soil with 100 percent passing the 3/8 inch sieve and no more than 10 percent passing the No. 200 sieve.
909.01.03 Class C Bedding
Use a granular soil conforming to the gradation requirements in Table 909.01-1. Table 909.01-1 Gradation for Class C Bedding Sieve Size Percent Passing 1 inch 100 No. 4 80 – 100 No. 200 0 – 12
909.01.04 Class D Bedding
Use coarse aggregate No. 8 as specified in 901.03.
909.02 Pipe
909.02.01 Reinforced Concrete Pipe
Manufacture reinforced concrete pipe at a plant listed on the QPL. In the manufacture of reinforced concrete pipe, use concrete that is composed of cement, coarse aggregate, fine aggregate, and water. Concrete may include admixtures, fly ash, or slag. Provide materials as specified: Aggregates ................................ ................................ ................................ ................................ .................... 901.06 Cement ................................ ................................ ................................ ................................ ......................... 903.01 Admixtures: Air-Entraining ................................ ................................ ................................ ................................ ........ 903.02.01 Chemical................................ ................................ ................................ ................................ ................ 903.02.02 Fly Ash ................................ ................................ ................................ ........................ ASTM C 618, Class C or F Slag ................................ ................................ ................................ ................................ ................... 903.02.03.B Water ................................ ................................ ................................ ................................ ............................ 919.08 If fly ash is used to control alkali-silica reactivity, use Class F fly ash. Manufacture reinforced concrete culvert pipe, storm drain, and sewer pipe to conform t o AASHTO M 170, Class III, Wall B, unless otherwise designated. For jacked pipe, use reinforced concrete culvert pipe conforming to AASHTO M 170, Class V, Wall B. Manufacture reinforced concrete elliptical culve rt, storm drain, and sewer pipe to conform to AASHTO M 207, Class HE-III, unless otherwise designated. If required for watertight flexible joints, use preformed flexible joint sealants conforming to AASHTO M 198. Follow the Department approved Buy America Compliance Plan. Provide documentation of compliance when requested by the ME. For concrete pipe that is less than 60 inches in diameter, submit a certification of compliance as specified in 106.07. The ME will randomly inspect and test small-diameter concrete pipe for quality assurance. For concrete pipe that is 60 inches or more in diameter, notify the ME at least 2 weeks before shipping pipe to the Project. The ME will inspect and approve large-diameter pipe in the supplier’s yard after manufacture. Perform 3 point loading in the supplier’s yard as directed by the ME. If the ME does not inspect the concrete pipe, submit certifications of compliance as specified in 106.07.
909.02.02 HDPE Pipe and Polypropylene (PP) Pipe
Use corrugated HDPE drainage pipe that conforms to AASHTO M 294 and is Type S (smooth interior with annular corrugations) with gasketed silt-tight joints. Use corrugated polypropylene (PP) drainage pipe that conforms to AASHTO M 330 and is Type S (smooth interior with annular corrugations) with gasketed silt-tight joints. Use HDPE and polypropylene (PP) pipe from a manufacturer who is an AASHTO NTPEP (National Transportation Product E valuation Program) certified manufacturer. For a list of NTPEP certified manufacturers, see the following webpage: https://data.ntpep.org/. Submit a certification of compliance, as specified in 106.07, for HDPE and polypropylene (PP) pipe.
909.02.03 Plastic Drainage Pipe
Use corrugated polyethylene drainage pipe according to AASHTO M 252, or use PVC drainage pipe according to AASHTO M 304. Use plastic drainage pipe from a manufacturer who is an AASHTO NTPEP (National Transportation Product Evaluation Program) certified manufacturer. For a list of NTPEP certified manufacturer s, see the following webpage: https://data.ntpep.org. Submit a certification of compliance, as specified in 106.07, for plastic drainage pipe.
909.02.04 Corrugated Aluminum Alloy Culvert Pipe and Pipe Arches
Use corrugated aluminum alloy culvert pipe and pipe arches conforming to ASTM B 745, Types I or II, and the following:
1.Type I. Fabricate corrugated aluminum alloy culvert pipe using 0.060 inch thick sheet metal, unless other thicknesses are designated. Use only helical corrugations, unless annular corrugations are designated. Join the pipe in the field with locking bands conforming to ASTM B 745, except that coupling bands with projections (dimples) are not allowed.
2.Type II. Fabricate corrugated aluminum alloy pipe arches using 0.060 inch thick sheet metal, unless other thicknesses are designated. Submit a certification of compliance, as specified in 106.07, for corrugated aluminum alloy pipe and pipe arches.
909.02.05 Corrugated Aluminum Alloy Underdrain Pipe
Use corrugated aluminum alloy underdrain pipe conforming to ASTM B 745, Type III. Fabricate the pipe using 0.048 inch thick sheet metal. Submit a certification of compliance, as specified in 106.07, for corrugated aluminum alloy underdrain pipe.
909.02.06 Corrugated Steel Pipe and Pipe Arches
Use corrugated steel pipe and pipe arches conforming to ASTM A 760, Types I and II. Use special sections, such as elbows and flared end sections, that conform to ASTM A 760 and are of the same thickness as the conduit to which they are joined. Ensure that corrugated steel pipe and pipe arches and special sections also comply with the following:
1.Type I. Fabricate corrugated steel pipe from 0.079 inch thick sheet metal, unless other thicknesses are designated. Use only helical corrugations, unless annular corrugations are designated. Field join the pipe with locking bands conforming to ASTM A 760, except that coupling bands with projections (dimples) are not allowed. Ensure that corrugated steel pipe and coupling bands, elbows, and flared end sections have a polymeric coating conforming to AASHTO M 246, Grade 36/11 (interior 0.010 inches and exterior 0.003 inches).
2.Type II. Fabricate corrugated steel pipe arches from 0.079 inch thick sheet metal, unless other thicknesses are designated. Ensure that corrugated steel pipe, coupling band s, elbows, and flared end sections have a polymeric coating conforming to AASHTO M 246, Grade 36/11 (interior 0.010 inches and exterior 0.003 inches). Submit a certification of compliance, as specified in 106.07, for corrugated steel pipe and pipe arches.
909.02.07 Steel Alloy Pipe for Bridge Storm Drains
Fabricate steel alloy pipe and fittings from alloy steel conforming to the chemical analysis of ASTM A 53, Grade B or ASTM A 500. The Contractor may use ductile iron pipe conforming to ASTM A 377 (ANSI/AWWA C151/A21.51) as an alternate. Ensure that the pipe and fittings are zinc -coated (galvanized) according to ASTM A 123. Weld steel pipe and fittings together before galvanizing. If ductile iron pipe is used, ensure that ductile iron pipe fittings conform to ASTM A 48, Class 30. Bend pipe using the long radius type of bend. Form pipe joints using groove-type couplings, consisting of a housing clamp keyed into a groove cut around the full pipe circumference. Provide a gasket of molded or extruded butyl rubber or ethylene propylene diene monomer to create a sealed joint. Use track-type bolts, conforming to ASTM A 183, with oval necks and heavy hexagonal standard nuts. Galvanize the assembly according to ASTM A 153. Submit a certification of compliance, as specified in 106.07, for steel alloy pipe.
909.02.08 Ductile Iron Water Pipe
Use ductile iron water pipe confo rming to ANSI/AWWA C151/A21.51. Use threaded flanges conforming to ANSI/AWWA C115/A21.15, and fittings conforming to ANSI/AWWA C110/A21.10 or C153/A21.53. Do not field weld ductile iron pipe. Perform required welding of a ductile iron pipe assembly in a fabrication shop. Submit a certification of compliance, as specified in 106.07, for ductile iron water pipe.
909.02.09 Fiberglass Pipe for Bridge Storm Drainage
Fabricate fiberglass pipe conforming to ASTM D 2996, RTRP-12EA1-2122 and fiberglass pipe fittings conforming to ASTM D 3840. Ensure that all fiberglass pipe, fittings and adhesives use pigmented resin throughout the wall and the color is concrete gray or designated color with UV stabilized resin. Painted gel-coat or exterior coating is not acceptable. Ensure that adhesives are in accordance with the pipe manufacturer and adhesive manufacturer’s recommendations.
909.03 Castings and Components for Drainage Structures
Ensure that castings, grates, extension rings, extension frames, and covers for inlets and manholes are capable of withstanding HS-25 loading when tested as a complete, assembled unit and conform to the following:
1.Gray Iron Castings. Use gray iron castings conforming to AASHTO M 306, except that the manufacturer may use gray cast iron conforming to AASHTO M 105, Class 30B or Class 35B. Ensure that castings are true to pattern in form and dimensions and are free from pouring faults, sponginess, cracks, blowh oles, and other defects in composition affecting their strength or integrity. To present a smooth, clean, and uniform surface, sandblast or clean the castings to remove sand and scale.
2.Carbon Steel Extension Frames and Rings. Use carbon steel extension frames and rings for inlets and manholes. When specified, galvanize the extension frames and rings according to AASHTO M 111. Perform welding of fabricated steel shapes and structures according to AWS D1.1. Do not punch, drill, ream, weld, or cut extension frames and rings in the field. Repair any damage to the galvanized coating.
3.Scuppers and Other Bridge Drainage. Use structural steel shapes and carbon steel castings conforming to AASHTO M 103, Grades 65-35 or 70-36, and carbon steel forgings conforming to AASHTO M 102, Class D.
4.Ductile Iron Castings. Use ductile iron castings conforming to ASTM A 536, Grade 65 -45-12 or Grade 80-55-06.
5.Epoxy Bedding Compound. Use an epoxy bedding compound that is listed on the QPL and is a 2 part, non-sag gel, rapid-setting epoxy adhesive conforming to the re quirements of ASTM C 881, Type 4 , Grade 3, Class B or C and is listed on the QPL. Use the epoxy in an ambient temperature range of 40 to 100 °F.
6.Ladder Rungs. For ladder rungs, use steel reinforced copo lymer polypropylene. Use a 1/2 inch diameter reinforcement steel bar conforming to ASTM A 615, Grade 60, and a polypropylene coating conforming to classification PP0344B33534Z02 according to ASTM D 4101.
Referenced in this section
Drainage in other states
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 509–512 of 651. View official source ↗