NAC445A.6718. Separation of lines: Lines across surface water.

     1. A supplier of water shall consult with the Division or the appropriate district board of health before preparing any plans for the construction of a pipeline of the public water system across any surface water, regardless of whether the crossing will be over or under the surface of the water.

     2. If the pipeline will cross over the surface of the water, the pipe must be adequately supported and anchored, protected from damage and freezing, and accessible for repair and replacement.

     3. Except as otherwise provided in subsection 4, if the pipeline will cross under the surface of the water, the pipe must be:

     (a) Covered with at least 5 feet of backfill; and

     (b) Enclosed in a pipe sleeve or encased with at least 4 inches of cement slurry.

     4. If the pipeline will cross under the surface of a channel of water that is 15 or more feet wide:

     (a) The pipe must be constructed with watertight mechanical joints that are capable of deflection.

     (b) Isolation valves must be located at both ends of the crossing in such a manner that the length of the crossing can be isolated for testing, repair and sampling. The isolation valves must be easily accessible and must not be subject to flooding. The isolation valve closest to the source of the supply of water must be located in a manhole or valve chamber which is large enough for human access. The manhole or valve chamber must contain a permanent sampling tap and means for pressure testing the pipe.

     (c) The pipe must be enclosed in a pipe sleeve or encased with at least 4 inches of cement slurry.

     (Added to NAC by Bd. of Health, eff. 2-20-97; A by Environmental Comm’n by R194-08, 10-27-2009)