Council Bluffs, Iowa
The city of Council Bluffs, Iowa, planned for capacity upgrades of the 28th Street Stormwater Pumping Station and upstream storm sewers in response to ongoing storm flooding. GBA completed the study, design, bidding and construction-phase services for the installation of a new stormwater pump station, which has the capacity to pump 161.5 MGD.
The station was designed to be phased from the initial installation of two non-clog pumps to four mixed-flow pumps. These pumps are equipped with 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 that 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 controls 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. To monitor the site, four security cameras were included: two fixed and two PTZ. A managed ethernet switch was provided to facilitate connection to the city’s SCADA system. GBA performed commissioning services for the pump station during construction and at startup.