In addition to a new primary effluent pump station, modifications to two existing aeration basins and construction of a third, an innovative biological phosphorus removal system was incorporated to meet stringent nutrient removal requirements. Enhancements at the WWTP were also designed to accommodate increased capacity in response to population growth. The City collaborated with a multidisciplinary team consisting of Brown and Caldwell (program manager), Jacobs Engineering Group (design engineer), and The Ewing Company, Inc. (general contractor) to deliver the award-winning improvements by September 2018.
PGA not only addressed the City’s near-term regulatory requirements, but it also set the stage for future wastewater program direction. The design was developed to allow flexibility in achieving both future phosphorus and nitrogen reductions, preserving the City’s opportunity to pursue a regulatory-compliant recycled water program.
“The vision and direction from initial concept through project funding and construction ensured a best-in-class solution to the City’s nutrient challenges,” said City of Nampa’s Deputy Public Works Director Nate Runyan. “Additionally, Project Group A has resulted in substantial removals of a key nutrient from Indian Creek and the Lower Boise River, creating visible improvements to water quality. This exceptional project will serve the citizens of Nampa well into the future.”
For more information, visit www.brownandcaldwell.com.
