Money received for Prosser water plant upgrade

By Loretto J. Hulse, Tri-City HeraldSeptember 30, 2013 

PROSSER -- The Prosser Public Works Department has received money from the state to upgrade its drinking water treatment plant at 1401 Highway 22.

The upgrades are totally unrelated to the water main break last March, said L.J. DaCorsi, the city's public works director. This work was approved by the state Department of Health in 2008 but was waiting on funding. That came through recently from the Drinking Water State Revolving Fund.

The city contracted with Rotchy Inc. of Vancouver, Wash., to do the work. The engineering consultant is HLA Inc. of Yakima.

The contract is for $1,766,932, which DaCorsi said will pay for:

-- Construction of a 48-foot-by-32-foot concrete block building to house a new sodium hypochlorite disinfection facility.

-- The demolition and removal of the existing, aging, outdated disinfection building.

-- Adding two new 12-foot diameter vertical pressure filter units to the existing filter building.

-- Other related filtering improvements including new piping, expanded access platforms, a stairway, an additional booster pump and motor and electrical control systems.

The city also will install new diesel engine generators at two of the city's wells, DaCorsi said.

Upgrading the filtration plant will significantly increase the city's capacity to provide clean drinking water to residents.

"The current filtering capacity is 5.3 million gallons per day (MGD) with six pressure filter units. With the improvements, and adding the two new pressure filters, the filtering capacity will be 7.10 MGD," DaCorsi said.

-- Loretto J. Hulse: 582-1513;

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