IIW completed a facility planning study for the City of Calmus’s WWTF. The study identified an expansion of the existing two-cell controlled discharge lagoon system to a three-cell controlled discharge lagoon system. This would bring the WWTF well under the limits of the DNR.
The improvement project includes construction of a primary cell lagoon at the WWTF. The lagoon includes process piping for both the primary and existing secondary lagoons. The project also includes two lift stations. One lift station is an influent lift station to the WWTF, capable of delivering a flowrate of 450 gpm. The second lift station consists of relocating and reconstructing a remote lift station on the north end of town, capable of delivering a flowrate of 270 gpm.
The project includes the addition of new force main and 1gravity sanitary sewer, including various manholes. Storm sewer and various storm sewer catch basins were installed including areas of pavement replacement.
The project was partially funded by a Community Development Block Grant issued by the United States Department of Housing and Urban Development as administered by the Iowa Economic Development Authority.
IIW provided engineering, land surveying, and construction administration services for the project.