The 2019 ACEC/Iowa Engineering Excellence Awards winning projects in the Water & Wastewater Category, in the order listed:

Water and Wastewater Grand Place Award (1st Place in Category)

Firm: Snyder & Associates
Client/Owner: Cass County
Project: Cass County Graywater Transmission
Contact: Mr. Tim Teig
E-mail: tteig @snyder-associates.com ~ Phone:  712-243-6505


In 2018, Elite Octane completed construction of a new ethanol production facility in Cass County, IA, just northwest of the City of Atlantic. Ethanol plants have heavy water usage demands, and Elite Octane, The Cass County Board of Supervisors, and the City of Atlantic saw an opportunity to reuse the City’s treated wastewater to blend with raw water for use in the cooling towers at the new ethanol plant. In late 2016, the County hired Snyder & Associates, Inc. to design a system that would efficiently transport treated effluent from the City’s wastewater treatment plant to the new ethanol plant.

The City currently treats wastewater using a sequencing batch reactor (SBR) and as a product of such treatment the treated effluent is discharged in large batches rather than a steady stream. The City’s existing system utilizes an effluent flow equalization basin to allow for lesser flow capacity through the subsequent UV disinfection process. This existing effluent flow equalization basin was fitted with three 72 Hp submersible pumps capable of transferring all the City’s treated effluent to the ethanol facility under typical flow conditions, which amounted to approximately 900 gpm, each pump. However, in the event that less flow is required, or effluent flow exceeds pumping capacity, the existing discharge through UV disinfection to the receiving stream is still possible.

In addition to the addition of pumps, approximately 4,300 feet of 12” force main was installed cross-country through the acquisition of seven permanent easements. Trenchless construction allowed for crossings of Highway 6, the East Nishnabotna River, and the Iowa Interstate Railroad. Valving and a flow meter where installed at the wastewater treatment plant for operational and maintenance needs.

The project was constructed over the latter half of 2017 through mid-2018 and serves as an example of how multiple entities can bridge together for economic and environmentally friendly alternatives. In addition to reducing the need of groundwater extraction, this project turned relative waste (wastewater effluent) into a resource, and by doing so is also providing a cleaner product for discharge into our environment.

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Water and Wastewater Honor Award (2nd place in category)

Project: City of Coggon Wastewater Treatment Plant Improvements
Firm: Fehr Graham
Client/Owner: City of Coggon

Project: North Liberty Wastewater Treatment Plant Phase II
Firm: FOX Engineering Associates, Inc.
Client/Owner: City of North Liberty

Water and Wastewater Engineering Achievement Award

Project: Spencer Water Treatment Plant
Firm: Bolton & Menk, Inc.
Client/Owner: City of Spencer

Project: Cedar Falls Dry Run Creek Sewer
Firm: Snyder & Associates
Client/Owner: City of Cedar Falls

Project: 2018 SW Third Street Water Main Improvements
Firm: MSA Professional Services, Inc.
Client/Owner: City of Ankeny



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