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' • • <br />CHAPTER 3 <br />WATER SYSTEM DESIGN CRITERIA <br />3.01 CHAPTER INCLUDES <br />A. Criteria for the design of water lines whereas water system design requirements are <br />established based on land uses as established in the City of La Porte zoning ordinance. <br />B. Construction and sizing of all water mains and appurtenances shall meet or exceed the <br />requirements of the Texas Commission ~ of Environmental Quality and Texas Board of <br />Insurance. <br />C. The public water system shall not extend beyond the water meter. All construction to the <br />meter shall conform to these standards. All private construction beyond the meter shall <br />conform to the requirements of the State Plumbing Code. <br />D. Design shall conform to the City of La Porte construction details. <br />3.02 DESIGN REQUIREMENTS <br />A. Obtain approval from the Planning Department for exceptions or deviations from these <br />requirements. Exceptions or deviations may be given on a project by project basis. <br />B. Lines: <br />1. Locate water lines within street rights-of--way, permanent access easements with <br />overlapping public utility easements, easements adjacent to street rights-of--way, <br />or recorded water line easements: <br />a. ~ Pipe with 2-inch diameter is allowed only within cul-de-sacs supplying <br />a maximum of 2 residential lots. 2-inch water lines shall not exceed <br />. 200 feet in length and shall be installed with a blow off at the end of the <br />line. <br />b. Pipe with a minimum of 8-inch diameter should be used for lines up to <br />1000 feet long and when 2 or more fire hydrants or flushing valves are <br />required. <br />c. Pipe with a 10-inch diameter should be used for lines between 1000 <br />feet long and 1500 feet long. <br />d. Pipe with 12-inch diameter and larger should be used for water lines <br />exceeding 1500 feet in length. <br />e. Avoid at all costs laying any water line under existing or proposed <br />paving: All water lines installed under paving by use of bore & jack, <br />auguring, microtunneling, or any other subsurface boring technique <br />shall be incased in steel casing for the total width of the above surface <br />plus 10 feet at a minimum. <br />f. Dead-end lines: <br />(1) Dead-end lines shall be avoided at all costs and may only be <br />considered when a looped or interconnected water main <br />system is not feasible from an Engineering and economic <br />standpoint. <br />(2) Serious consideration should be given to fiihire looping or <br />interconnect of any approved dead-end line. <br />(3) Dead-end lines within public right-of-way: <br />(a) On permanent dead-end lines, the line shall be 8 <br />inches in diameter and shall not exceed more than <br />700 feet in length from the closest interconnection <br />Water System Design Criteria Page 1 of 12 <br />