The Glen Forest Stormwater Detention Basin reduces the risk of flooding in the mid-reach stretch of Greens Bayou by taking in excess stormwater during heavy rain events and then releasing it slowly back to the channel when the threat of flooding has passed. The stormwater detention basin, completed in March 2021, holds 894 acre-feet, or 291.3 million gallons, of excess stormwater that might otherwise flood homes and businesses.
As part of this project, the Flood Control District constructed almost four acres of native tree and shrub plantings and stormwater quality treatment wetlands. Additionally, natural channel design features, including riffles, pools and a natural meander pattern, were used in the low-flow channel within the stormwater detention basin to provide environmental and water quality enhancement.
The Glen Forest Stormwater Detention Basin is part of the comprehensive flood risk reduction plan for the mid-reach stretch of Greens Bayou, which includes construction of 11 miles of channel conveyance improvements and four stormwater detention basins: Aldine Westfield (Phase 1 complete), Glen Forest (complete), Kuykendahl (complete), and Lauder (Phase 1 under construction).