July 28, 2008

T.F. Council to Vote on Digester Remodeling

By The Times-News, Twin Falls, Idaho

Jul. 28--The Twin Falls City Council will decide tonight whether to spend more than $123,000 to replace the lining of the digester at the city's wastewater treatment plant.

Digesters are the last stop in the treatment process, where incoming solid waste, already heavily siphoned, is biologically processed into a useful product as compost that is distributed among the agricultural community. Methane gas is the excess product of the treatment.

Cracks in the tank's roof were discovered during a routine inspection last year, facility officials have said. About 9,032 square-feet in the digester should be replaced, according to a city staff report.

The damage is the result of years of the concrete building contracting and expanding -- normal wear and tear to tanks built in 1981. Maintaining the digesters gives them a longer shelf life, possibly as much as 20 years, and these upgrades are intended to keep from permanent damage.

Bids were opened July 17 and the lowest bid was Matheson Painting, Inc. from Pasco, Wash. for $123,648.08

The project was not anticipated and not included in the budget, the report shows. Funding would come from reserves or unspent capital budget funds.

Other agenda items:

--Consideration of a proposal by Conservation, Seeding and Restoration for landscaping at the southwest corner at Falls Avenue West and Fillmore Street.

--Consideration of a cooperative agreement with the Idaho Transportation Department for Washington Street North from Falls Avenue to Poleline Road. The agreement will set terms and conditions for relocating the city's water lines, updating traffic signals and relocating a timber light pole.

--Discussion over the proposed $51 million budget for the 2008?"2009 fiscal year.

Council meetings are at 5 p.m. at 305 Third Ave. E. and are open to the public.


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