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<br />B. Undivided pavement section five feet (5') inside the right-of-way. For storm sewer <br />located in a public street right-of-way, a minimum of two-foot (2') shall be maintained <br />inside the right-of-way line to the outside edge of the storm sewer unless otherwise <br />accompanied by an adjacent easement. <br />C. Alternate locations for a storm sewer will be permitted by the City Engineer. <br /> <br />5.7.3 Recommend alignment within an exclusive storm sewer easement. <br /> <br />A. Storm sewers placed in easements shall conform to the requirements of Section 2.4.5 <br />B. Storm sewers within easements shall be placed no closer than five feet (5') measured <br />from the outside edge of the pipe to the edge of an easement, except when adjoining <br />another easement or public right-of-way where the distance may be reduced to two feet <br />(2'). The storm sewer shall be placed in the center of the easement. When the storm <br />sewer easement adjoins a public right-of-way, the easement may be reduced to a <br />minimum often feet (10') and the storm sewer may be aligned close to the right-of-way <br />line, as long as required clearances are met, with specific approval of the City Engineer. <br /> <br />5.8 STORM SEWER MA TERlALS <br /> <br />5.8.1 Storm sewer and culvert pipe shall be precast reinforced concrete pipe, unless specifically <br />approved by the City Engineer. Concrete pipe shall be manufactured in conformance with the <br />requirements of ASTM C 76, " Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe," <br />current revision. Reinforced concrete pipe shall be Class III or stronger. The design engineer <br />shall provide for increased pipe strength when conditions of the proposed installation exceed the <br />allowable load for Class III pipe. All concrete pipe constructed in water-bearing soil or forty-two <br />inched (42") in diameter or larger, shall have rubber gasket joints meeting the requirements of <br />ANSI/ASTM C 443, "Joints for Circular Concrete Sewer and Culvert pipe, Using Rubber <br />Gaskets", current revision. Concrete pipe with diameter of less than forty-two inches (42") may <br />be installed using pipe with tongue and groove type joint and Ram-nele, or approved equal, as a <br />joint filler. When specifically approved by the City Engineer, reinforced concrete arch and <br />elliptical pipe conforming to ASTM C506 and ASTM C507, respectively, current revision, may be <br />installed in lieu of circular pipe. Reinforced concrete box culverts shall meet the minimum <br />requirements of ASTM C789, "Precast Reinforced Concrete Box Sections for Culverts, Storm <br />Drains, and Sewers", current revision. pipe joints for arch and elliptical pipe and box culverts <br />shall be sealed using Ram-nek or approved equal. <br /> <br />5.8.2 Storm sewer outfalls into open channels shall be constructed using corrugated steel pipe. <br />Corrugated steel pipe shall be manufactured in conformance with the requirements of <br />AASHTO Designation M-36-82, current revision. Pipe material shall be Aluminized Steel Type <br />2, meeting the requirements of AASHTO Designation M-27-79I, current revision, or Pre-coated <br />Galvanized Steel, AASHTO M-246, 10 mil coating on both sides. All pipe shall have a full <br />double coating, Type A, in accordance with AASHTO Designation M-190, current revision. Pipe <br />joints and fittings shall meet the minimum requirements of these specifications and shall have an <br />O-ring gasket seal meeting the requirements of AASHTO C-361, current revision. (See City of La <br />Porte Construction Details). <br /> <br />5.8.3 Storm sewer outfalls shall have a slope protection to prevent erosion. Slope protection may be <br />constructed of slope paving or rip rap. Slope paving shall be four-inch (4") five (5) sack concrete <br />with six-inch by six-inch (6" x 6") welded wire mesh (W14 x W14) or three eighths inch (3/8") <br />steel rebar on twenty-four-inch (24") centers, each way. Rip rap shall be a minimum of six-inch <br />(6") broken concrete rubble with no exposed steel or well-rounded stone and shall be a minimum <br />of eighteen inched (18") thick. Slope protection texturing shall be required where public access <br />likely. Refer to the Construction Details for minimum dimensions. <br /> <br />Stonnwater Criteria Page 8 of 10 <br />