Peosta Wastewater Collection System Improvements

Peosta, Iowa

Peosta Wastewater Collection System Improvements

IIW recently completed a Facility Plan for a new wastewater treatment facility (WWTF) in the City of Peosta. The City of Peosta has been experiencing rapid growth since 2005 and their existing lagoons are currently loaded to more than 70 percent of their rated capacity. Previous planning studies indicate that capacity may be reached within the next 5 to 10 years. City leaders recognized this issue and started the official planning process for the improvements in 2015.

IIW worked with the City early in the process to identify potential sites and treatment technologies, which allowed the City to work with landowners and tour similar WWTFs in the region. After the input from stakeholders, the City selected a new mechanical treatment facility at a site immediately adjacent to the existing lagoons. The proposed treatment facility features: mechanical screening and grit removal; an extended aeration activated sludge treatment process; a ultraviolet radiation disinfection system; an aerobic sludge digester; and solids dewatering. The treatment process includes provisions to meet nutrient removal goals outlined in the Iowa Nutrient Reduction Strategy.

Due to the readiness of the Facility Plan, in the fall of 2018 the City pursued grant funding from the federal EDA. The City was ultimately successful in receiving up to $3 million dollars in grant assistance for construction of the project, thus lowering the cost of the project for residents, businesses, and industries. The remainder of the project will be funded through Iowa SRF loans.

IIW is now working on design of the new WWTF and expects construction to take place starting in 2020 with completion in 2021.