Projects & Studies
(Update: On May 1, Harris County Commissioners Court awarded a $3.7 million construction contract to low bidder Challenger Services Inc. for intermediate excavation of the Phase 1 site. Work is expected to get underway in June 2018 and will take about six months.)
C-34 Lauder Stormwater Detention Basin
The Lauder Stormwater Detention Basin project in the Aldine area of north Harris County will address repetitive flooding in the Greens Bayou watershed. It is one of several flood damage reduction projects planned for the Greens Bayou watershed that fall under the Harris County Flood Control District’s umbrella effort, called Progress Greens.
Formally identified as HCFCD Unit P500-06-00, the Lauder basin will be constructed in three phases:
• Phase 1 involves excavation of stormwater detention on the original Lauder site, a 90-acre property bordered by Greens Bayou on the north, Lauder Road on the south, the neighborhood property line west of Green Teal Lane on the east, and Greens Bayou tributary P138-01-00 on the west. Intermediate excavation is scheduled to begin in 2018 as the Flood Control District awaits necessary environmental permitting. A request for an environmental permit was submitted to the U.S. Army Corps of Engineers in September 2017 and will take at least one year for processing. The Phase 1 site has been partially excavated in previous excavation and removal agreements.
• Phase 2 involves the future excavation of property of the former Castlewood subdivision that is located to the east of Greens Bayou tributary P138-01-00.
• Phase 3 involves the future excavation of the remainder of Castlewood, located to the west of Greens Bayou tributary P138-01-00.
Lauder Stormwater Detention basin will be a wet-bottom basin, with a permanent pool, island and features designed to improve stormwater quality. The basin design preserves an approximately 200-foot-wide wooded area along Greens Bayou, as well as a tree buffer along the east side of the site. A remnant channel, or “oxbow,” between Phases 2 and 3 also will be preserved, along with wetland areas. Additional trees will be planted post-construction.
While the basin’s primary function is to reduce flooding risks, the site will be available for appropriate recreational development by other entities.
Lockwood, Andrews & Newnam Inc. is serving as the Flood Control District’s engineering consultant for the stormwater detention basin project.
When complete, the Lauder Stormwater Detention Basin is expected to hold at least 1,200 acre-feet, or more than 391 million gallons of excess stormwater that otherwise might flood homes and businesses. Stormwater detention basins reduce flooding risks during heavy rain events by safely storing excess stormwater and slowly releasing it back to the bayou when the threat of flooding has passed. This project will reduce risks in more common 10 percent (10-year) floods, but would be overwhelmed in a much larger storm.
Sections of the Castlewood subdivision were built in the early 1960s in an area that is not only within the Greens Bayou floodplain, but also in a former floodway of Greens Bayou before the bayou was rerouted and straightened in the early 20th Century.
Development occurred many years before the advent of Harris County’s first floodplain maps and associated development regulations in the 1980s. Since the late 1970s, there have been more than a dozen recorded flood events in the area.
The original Lauder basin site was purchased by the Flood Control District as undeveloped land in 2000. This purchase was in connection with the Greens Bayou Mid-Reach Flood Damage Reduction Plan, which includes construction of four stormwater detention basins, improvements to 11 miles of channel between John F. Kennedy Boulevard and Beltway 8, and modifications to 19 bridges. The Kuykendahl and Glen Forest basins are currently under construction; the Aldine Westfield basin is in design.
Castlewood (Sections 1 & 2) Community -- Property Acquisition
Plans for the Lauder basin originally included only the original 90-acre site on the east side. However, to address persistent flooding, the Flood Control District conducted several voluntary home buyouts in the Castlewood (Sections 1 & 2) subdivision to the west, and included this area in the basin expansion effort. Eventually, the Flood Control District proceeded with a mandatory property acquisition plan to purchase the remaining properties in Castlewood Sections 1 & 2, which is located north of Greens Bayou tributary P138-00-00. This process is underway.
Questions? Please contact the Harris County Flood Control District through the Project and Study Information Line at 713-684-4040 or contact us online.
....is the name given to a suite of flood damage reduction projects currently active in the Greens Bayou watershed of Harris County. The Harris County Flood Control District is taking the lead in some of those projects, with grant assistance from the Federal Emergency Management Agency (FEMA). In others, the U.S. Army Corps of Engineers will design and construct the project, with partnership assistance from the Flood Control District.
All projects under the Progress Greens umbrella will function together to reduce flooding risks and damages for residents and businesses within the 213 square miles of the Greens Bayou watershed.