§ 42-195. Water facilities.

(a)

General. In the absence of specific standards contained in this article, all water supply, distribution, pumping, and storage improvements shall be designed in accordance with the most current standards of the American Water Works Association and the most current edition of Rules and Regulations for Public Water Systems of the Texas Natural Resources Conservation Commission.

(b)

Basic requirements. Basic requirements are as follows:

(1)

All water mains in residential areas shall be a minimum of six inches in size and looped where possible. Water mains in industrial and commercial areas shall be a minimum eight inches in size. All water mains shall be PVC C-900, DR-18 or ductile iron as shown on typical standard details. Asbestos cement pipe (AC) will not be allowed for construction.

(2)

Water mains should be large enough to supply the fire flows required, but no less than eight-inch in mercantile areas and no less than six-inch in scattered residential areas.

(3)

No six-inch dead-end main should be more than 1,800 feet long.

(4)

No six-inch looped main should be more than 3,500 feet long. (Note: A loop is that between one two-way feed and another independent two-way feed.) An eight-inch or larger pipe is considered to be a two-way feed for this one purpose. A feed for this purpose cannot be less than six-inch size. A test to determine if there is a loop is whether flow is obtained if a line is valved off.

(5)

The city may participate in the cost of any oversize lines required to serve land areas and improvements beyond the subdivision. The city's participation will be difference in the actual construction cost of the oversized line and the estimated construction cost, as determined by the city engineer, of the line properly sized to serve only the land area of the development.

(6)

The cost of mains larger than six inches must be borne by the developer if such larger main is required to adequately serve the subdivision.

(7)

Standard three-way fire hydrants shall be installed as a part of the water distribution system in accordance with specifications of the state board of insurance and the city. Fire hydrants in multifamily, commercial and industrial areas shall be on street intersections and so located that there will be a fire hydrant every 300 feet as measured along the street. Fire hydrants in a residential area shall be located on all street intersections and not over 600 feet apart as measured along the street. The spacing and location of fire hydrants is subject to approval of the city fire marshal. Fire flows required:

Area	Flow
Principal mercantile and industrial areas	3,000 gpm
Light mercantile areas	1,500 gpm
Congested residential areas	750 gpm
Scattered residential areas	500 gpm

 

All fire flows to be calculated with 20-pound residual pressures.

(8)

Valves of approved design shall be installed at the intersections of all water mains so as to provide for proper maintenance and operation of the system and to provide a means of shutting off the supply to portions of the system for repairs. Sufficient valves shall be installed to cause a minimum interruption of service.

(9)

The depth of cover shall be a minimum of 36 inches below finished grade.

(10)

Pipeline markers will be used to locate road crossings and cross country lines in rural areas.

(11)

Valve markers shall be provided in rural areas.

(12)

Corporation stops and meter boxes shall be provided at all services.

(13)

Adequate air relief, draining, and flushing valves must be provided for flushing, disinfection, daily operation requirements, and repairs.

(Code 1994, ch. 9, art. 53; Ord. No. 248, exh. A(art. 53), 3-24-1997)