A. All water main pipe shall be ductile iron or polyvinyl chloride (PVC) - AWWA C900, C905, or C909.
B. All water main fittings, i.e., tees, crosses, bends, etc., shall be ductile iron.
C. All water main materials and installation shall be in accordance with the city standard specifications for the construction of water lines and the applicable standard drawings depicting various water main installation details. A minimum shall be the following:
1. Pipe Bury Depth: Sixty inches (60") minimum.
2. Pipe Bedding Material:
a. Material: Three-quarter inch (3/4") sixty percent (60%) crushed or fractured gravel and sand meeting the following graduation:
Sieve Size
|
Percent Passing
|
3/4 inch | 100 to 80 |
3/8 inch | 70 to 20 |
No. 4 | 20 to 5 |
No. 200 | 3 to 0 |
Bedding material may be created from excavated material by screening, sifting, or blending.
b. Bedding System: Four inches (4") below and six inches (6") above pipe.
c. Bedding Compaction: Ninety two percent (92%) relative density (AASHTO T99) minimum.
3. Full Trench Compactive Effort:
a. Ninety five percent (95%) density (AASHTO T99) minimum within three feet (3') of an asphalted service or within a currently traveled or proposed or future traveled graveled or asphalted roadway.
b. Ninety two percent (92%) relative density (AASHTO T99) minimum outside of the three foot (3') roadway prism and within existing or future right of way.
4. Surface Restoration:
a. Asphalted Surface:
(1) Subbase: A minimum of eight inches (8") of city approved three-quarters inch (3/4") minus road base compacted to ninety five percent (95%) relative density (AASHTO T99) or match existing, whichever is greater.
(2) Asphalt Mat: A minimum of two inches (2") of city approved hot plant mix or match existing, whichever is greater.
b. Nonasphalted Surfaces:
(1) Subbase And Surface: A minimum of six inches (6") of city approved three-quarters inch (3/4") minus road base compacted to ninety five percent (95%) relative density (AASHTO T99) or match existing, whichever is greater.
c. Agriculture Or Pasture Surfaces: Match existing. (Ord. 510, 6-22-2004, eff. 6-22-2004)
D. All water service line materials and installations shall be in accordance with the city standard specifications for the construction of water lines and the applicable standard drawings depicting the various water service line installation details. (1980 Code § 4.6.44)
E. All water system materials shall be of the class, strength and thickness necessary to safely accommodate or provide for a water system pressure of a minimum of two hundred (200) psi. (Ord. 510, 6-22-2004, eff. 6-22-2004)
F. All water system materials shall be of the class, strength, thickness, etc., necessary to accommodate or provide for the depth of cover over the pipe, the type of material and bedding around the pipe, and the type, magnitude, and extent of the external loads being applied to the pipe. (1980 Code § 4.6.44)
G. All materials must be approved by both the public works director and appointed city engineer. (Ord. 510, 6-22-2004, eff. 6-22-2004)