Current through September 16, 2024
1. Except as
otherwise provided in this section, a water main must be installed:
(a) For public water systems in Carson City,
Fallon, Reno, Sparks, Yerington, Douglas County, Lander County, Lyon County,
Nye County or Washoe County, in compliance with Standard Specifications
for Public Works Construction, also known as the "Orange Book," and
the American Water Works Association Standards, as adopted by
reference in NAC
445A.6663.
(b) For public water systems in Boulder City,
Henderson, North Las Vegas, the Big Bend Water District or the Las Vegas Valley
Water District, in compliance with Uniform Design and Construction
Standards for Potable Water Systems and the American Water Works Association
Standards, as adopted by reference in NAC
445A.6663.
(c) For public water systems in other areas
of the State, in compliance with the American Water Works Association
Standards, as adopted by reference in NAC
445A.6663.
(d) Except as otherwise provided in
paragraphs (a), (b) and (c), in compliance with the procedures for installation
recommended by the manufacturer of the water main.
2. Except as otherwise provided in this
subsection, water mains must be installed in areas that are dedicated for
public use as streets or highways or are otherwise sufficiently open to the
public to facilitate access for maintenance and emergency repairs. Water mains
may be constructed on private property, under structures or in or under bodies
of water only if approved by the Division or the appropriate district board of
health.
3. Piping for a
distribution system must be designed and constructed in such a manner that
appropriate measures, as determined by frost depth, type of backfill and
surface loads, are taken for trenching, bedding and refilling. Water mains must
be:
(a) Properly bedded and covered with a
sufficient amount of earth or other insulation to prevent freezing.
(b) Installed with at least 36 inches of
cover over the piping or at least 12 inches below frost depth, whichever is
deeper.
4. The design
and construction of a distribution system must provide for the avoidance of
pressure surges and water hammer through the use of reaction blocking and
similar methods. Where appropriate, water mains, tees, bends, plugs and
hydrants must have thrust blocks, thrust anchors or joints designed to prevent
movement. Water mains located on a slope must be restrained in such a manner as
determined appropriate by an engineer.
5. Locator tape, magnetic tape or conductive
wire and tape must be installed in the trench above a water main.
6. A water main must not be placed into
service after its initial construction until:
(a) The water main has been disinfected in
accordance with American Water Works Association Standard
C651, as adopted by reference in NAC
445A.6663. The disposal of any
spent chlorine solutions must be coordinated with the Division.
(b) An analysis of the water main which
indicates that it meets primary standards for coliform bacteria has been
obtained and reported to the Division or the appropriate district board of
health.
7. The piping
installed in a distribution system must, if the piping consists of:
(a) Ductile iron, be pressure tested in
accordance with American Water Works Association Standard
C600, as adopted by reference in NAC
445A.6663;
(b) PVC, be pressure tested in accordance
with American Water Works Association Standard C605, as
adopted by reference in NAC
445A.6663; or
(c) Another material, be pressure tested in
accordance with:
(1) For public water systems
in Carson City, Fallon, Reno, Sparks, Yerington, Douglas County, Lander County,
Lyon County, Nye County or Washoe County, Standard Specifications for
Public Works Construction, also known as the "Orange Book," as adopted
by reference in NAC
445A.6663;
(2) For public water systems in Boulder City,
Henderson, North Las Vegas, the Big Bend Water District or the Las Vegas Valley
Water District, Uniform Design and Construction Standards for Potable
Water Systems, as adopted by reference in NAC
445A.6663; or
(3) For public water systems in other areas
of the State, the requirements of the Division or the appropriate district
board of health, before the piping is flushed, disinfected or sampled for an
analysis of water quality.
8. During the construction of a distribution
system, any openings in unfinished piping or appurtenances must be sealed at
the end of each working day in such a manner as to prevent the entry of birds
and other animals, dirt, trench water and other sources of pollution or
contamination.
Added to
NAC by Bd. of Health, eff. 2-20-97; A by Environmental Comm'n by R194-08,
10-27-2009; A by
R118-14,
eff. 12/22/2014; A by
R104-22A,
eff. 12/9/2022
NRS 445A.860
