Chesterton Tribune



Bids are in for initial phases of plan to reduce sewage bypasses into Little Calumet

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The bids for the first phase of the Chesterton Utility’s long term control plan (LTCP)--a federal mandate to reduce combined sewer overflows into the Little Calumet River--are in.

Although the major thrust of the LTCP is the construction of a 1.2-million gallon storage tank to hold stormwater-diluted wastewater during heavy rain events until the treatment plant can catch up, the LTCP is comprised of several other components as well.

The total estimated cost of the plan: $14.9 million. The Utility Service Board expects to close on a low-interest loan from the State Revolving Fund early this summer.

The bids for three separate LTCP projects were opened at the Service Board’s meeting Monday night. Members voted 4-0 to take them all under advisement. Member Scot McCord was not in attendance.

Bids for Phase 1A, in which a number of improvements will be made at the wastewater treatment plant, including the installation of a sludge thickener, the replacement of a blower and an aeration diffuser, and the purchase of a new generator:

*$4,712,000 (alternative $4,707,000) from Thieneman Construction Inc. of Westfield, Ind.

*$5,218,910 (alternative $5,288,910) from Woodruff & Sons of Michigan City.

There was only one bid for Phase 1B, in which five manholes serving two sanitary sewer lines will be rehabilitated and relined: $584,952 (alternative No. 1 $69,475, alternative No. 2 $101,425) from Kenney Construction of Northbrook, Ill.

And there was only one bid for Phase 3B, in which a permanent emergency generator will be installed at the Westwood Manor lift station and the Dogwood and Golfview Estates lift stations will be switched from single-phase power to three-phase: $223,000 (alternative $7,000) from Thieneman Construction.

The LTCP is a mandate of the U.S. Environmental Protection Agency, administered by the Indiana Department of Environmental Management, the whole point of which is to significantly reduce the amount of sewage which the Utility is forced to release into the Little Cal River during heavy rains.

Those sewage releases are more technically known as combined sewage overflows and they’re caused by unseparated sanitary and stormwater systems, or else by the infiltration of a sanitary system. During very wet weather, the amount of stormwater which finds its way into the town’s sanitary system can sometimes threaten to swamp the wastewater treatment plant, forcing bypasses.

The LTCP is designed to reduce, if not altogether to eliminate, the need for bypasses, with the construction of the 1.2-million gallon storage tank, into which the plant’s main lift station will pump the stomwater-diluted wastewater until the severity of the storm decreases and the plant’s capacity has had a chance to catch up. The tank will then bleed the excess back into the system for full treatment.



Posted 4/18/2013