The Sawmill tank is located near the community of Arnold on a mountaintop at an approximate elevation
of 4,500 feet above mean sea level. Access to the site is via Tank Road, a one-lane unpaved road that is
steep with many tight turns. The road is not plowed and is inaccessible except by snow machine in the
winter. The District desires to have the two replacement tanks constructed during the spring through fall
seasons. The existing welded steel tank has a capacity of 3 million gallons but will be replaced by two 0.5-
million-gallon bolted glass-lined steel tanks. The existing tank suffers from water quality issues due to
being oversized and has reached the end of its useful life. Once the new tanks are constructed and
commissioned, the existing tank and existing tank gravel pad will be decommissioned and are to be removed
from the site. The project includes significant site grading and piping. Figure 1 identifies the project
location.
The Wallace tank is located near the community of Wallace, south of Camanche Reservoir. The site is
generally flat within the proximity of the tank and is easily accessed via an unpaved access drive from
Wallace Lake Drive. The existing welded steel tank is 0.22 million gallons and will be replaced by a single
0.23-million gallon glass-lined bolted steel tank. This project will require installation of three (3) 8,000-
gallon temporary tanks and temporary above-ground piping. The existing tank and concrete foundation are
to be removed from the site once the temporary tanks have been installed and commissioned. The new
replacement tank and concrete foundation will be constructed in the same location as the existing tank.
Once the permanent tank is commissioned, the temporary tanks and piping will be decommissioned and
removed from the site. The project requires only minor grading, and permanent site piping is minimal.
Figure 1 identifies the project location.
These two tank replacement projects have individual CIP project numbers, but will have a combined bid
schedule and must be bid, invoiced, and tracked together. Both sites are each less than one (1) acre and are
greater than ¼ mile apart. Therefore, a formal SWPPP is not required for these projects, but a construction
BMP plan is provided in the plan set. Both projects are CEQA-Exempt.
The Engineer’s construction cost estimates are as follows:
– Wallace and Sawmill Water Storage Tank Project: $4,048,240