Section NR 811.77 - Common casing crossingsIn some cases, such as highway crossings, it becomes desirable due to extremely high construction costs to install water mains, sanitary sewers, force mains or storm sewers within a common casing. The following requirements apply:
(1) Any sewers shall be constructed of water main class pipe and joints and pressure and leakage tested in accordance with the requirements in s. NR 811.12(5) (d) 2.(2) The water main shall be located above the sewer main and be adequately supported.(3) A vertical separation distance of 6 inches shall be maintained between the bottom of the water main and the top of the sewer main.(4) Normal separation distances shall be provided as close as possible to the ends of the casing.(5) Force mains shall be installed within an intermediate casing within the larger casing. The intermediate casing shall extend a minimum of 5 feet beyond each end of the larger casing.(6) The remaining space in the casing may be filled if desired.Wis. Admin. Code Department of Natural Resources NR 811.77
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.