The Trentwood Irrigation District, which serves an area on the north side of Spokane Valley, is planning to install a 2 million-gallon reservoir on the hillside near East Valley High School.
The district is in the process of securing a contractor for the project, estimated at $2.5 million.
Devon Sinsley, assistant manager of the district, said the new tank is needed to create a sufficient water supply for firefighting.
The tank will be excavated into a hillside and will stand 30 feet tall on the down slope side. The up slope side will be dug into the ground about 15 feet.
The tank will be painted in a natural color to blend into the landscape, Sinsley said.
On Tuesday, Spokane County commissioners declared that the project has only local significance and not regional significance.
That allows the district to move ahead without undergoing public facilities siting process required for regional projects under state law. That process can be costly and time consuming.
E&H Engineering Inc., of Spokane, was chosen to design the tank.
The project is part of the district’s 20-year plan. The district applied in 2011 with the state for a low-interest public works trust fund loan, and obtained approval for the loan in 2012.
The district has held public meetings and kept its customers informed about the project through newsletters, Sinsley said.
Trentwood Irrigation District has about 1,784 connections and serves an area along Trent Avenue in the vicinity of Pines and Sullivan roads, including the residential area near Wellesley Avenue.