Enhancing Flood Management and Infrastructure
Project Overview
The Stormwater Pumping Station at 28th Street is in Council Bluffs, Iowa. The City planned for capacity upgrades of the pumping station and upstream storm sewers in response to ongoing storm flooding. GBA completed the study, design, bidding and construction-phase services for installing a new stormwater pumping station, which can pump 161.5 MGD.
Initially, the station was designed to be phased from installing two non-clog pumps to four mixed-flow pumps. These pumps had 250 HP motors and variable frequency drives (VFDs). The finished design features include:
- Automatic self-cleaning bar screen
- Flow diversion structure with sluice gates for controlling flow
- Electrical equipment and pump removal equipment installed in a building over the wet wall
- 600 kW generator
- Switchboard with automated power transfer functionality
- Four 36-inch-diameter welded steel discharge pipes convey flow to a discharge structure on the Missouri River
The design also included collaboration with city staff for the pump control and SCADA system connection.
During the construction phase, GBA conducted two control meetings to discuss communications between the PLC-based control system and the switchboard, generator, VFDs, sluice gate actuators, bar screen controls and pump control modules. Four security cameras—two fixed and two PTZ—were included to monitor the site. A managed ethernet switch was provided to facilitate connection to the city’s SCADA system. GBA also performed commissioning services for the stormwater pumping station during construction and at startup.
Awards
ACEC Nebraska 2015 Merit Award
Iowa APWA Project of the Year ($5M-$25M)