Zorinsky Water Quality Basin #2

Project Information

Zorinsky Basin #2 (ZB-2) is a water quality basin designed to trap sediment and excess nutrients from the developing watershed that leads to Zorinsky Lake. ZB-2 along with three other basins help prevent sediment from building up in Zorinsky Lake. Development in the ZB-2 watershed made this structure a priority and it was completed by 2020. The City of Omaha manages the site, but no recreation features are included at the water quality basin sites.

Project Location

Project Details

Status: Completed

Location: Douglas County, NE

Drainage Area: 920 acres

Lake Area: 20 acres

Project Site Area: 78 acres

Project Highlights

ZB-2 was the last of the water quality basins that protect Zorinsky Lake to be installed.
Similar to ZB-1, a unique labyrinth weir outlet structure with high hydraulic capacity was used, which reduces the height of the embankment and ultimately the area required for the basin.
Challenges overcome during the construction of ZB-2 included working around a 54" transmission waterline, combating unusually wet weather, and high groundwater conditions.