Greens Bayou Federal Flood Risk Management Project

Greens Bayou Federal Flood Risk Management Project
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Project Description

The U.S. Army Corps of Engineers Galveston District (Corps) and Harris County Flood Control District broke ground in 2015 Greens Bayou Federal Flood Risk Management Project in the upper stretch of Greens Bayou. Under a Project Partnership Agreement signed in May 2015, the Corps is responsible for design and construction and the Flood Control District and is responsible for acquiring other property and easements, relocating utilities, and then maintaining the completed stormwater detention basin and channel.

The project includes approximately 3.7 miles of channel conveyance improvements, intended to reduce the area’s water surface elevations, from Cutten Road to Veterans Memorial Drive, and the construction of the Antoine Stormwater Detention Basin, formally known as HCFCD Unit P500-05-00. The Antoine Stormwater Detention Basin is divided into two parts, split by West Greens Drive. It is connected by box culverts and is intended function as a single stormwater detention basin, in order to reduce the risk of flooding 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 was constructed to hold 1,650 acre-feet, or 538 million gallons, of excess stormwater that might otherwise flood homes and businesses.

Upon completion of construction, the Corps will plant native trees and grasses in and around the basin, with wetland plants placed in low areas as part of the landscaping. They will also plant grasses on disturbed areas of the bottom and sides of the bayou, and native trees where appropriate along the bayou banks. These features will improve stormwater quality, support wildlife and provide opportunities for recreational benefits.

Location

The channel conveyance improvements are located from Cutten Road to Veterans Memorial Drive and the Antoine Stormwater Detention Basin is located near the intersection of Antoine Drive and the Sam Houston Tollway.

Stage

Phase I was completed in 2016 and included excavation of the north cell of the stormwater detention basin, located north of West Greens Road, and construction of an outfall structure to Greens Bayou.

Phase II CONSTRUCTION began in late 2016 and was completed in 2020. This final phase included completion of the north cell of the stormwater detention basin, excavation of the south cell of the stormwater detention basin, located south of West Greens Road; and construction of the channel conveyance improvements from Cutten Road to Veterans Memorial Drive.

Funding

Total project cost was $45 million. The cost share is approximately 75 percent federal (Corps) and 25 percent local (Flood Control District). 

Project Photos

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Greens Bayou Federal Flood Risk Management Project: Phase I is complete, Phase II is in progress