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| Marlow Dam | |
|---|---|
| Name | Marlow Dam |
| Location | Tarrant County, Texas |
| Country | United States |
| Status | Operational |
| Opening | 1927 |
| Owner | City of Dallas |
| Dam type | Concrete gravity |
| Height | 50 ft |
| Length | 800 ft |
| Reservoir | Lake Casa Blanca |
| Plant capacity | 22 MW |
Marlow Dam Marlow Dam is a concrete gravity dam on the Brazos River in Tarrant County, near Mansfield and Grand Prairie. Built in the 1920s, the dam created a reservoir that has influenced development in the Dallas–Fort Worth Metroplex, affecting water supply, navigation, and regional infrastructure projects. It has been associated with municipal utilities, federal agencies, and private contractors throughout its operational history.
Early 20th-century interest in flood control and water supply in the Texas Republic era led to surveys by engineers linked to United States Army Corps of Engineers and private firms such as Brown and Root. Financing involved municipal bonds issued by the City of Dallas and agreements with regional entities including Tarrant County commissioners. The project intersected with policies from the Federal Power Act era and later programs of the Public Works Administration during the Great Depression. Ownership and operational shifts involved transactions with utilities like Texas Electric Service Company and later integration with regional authorities including the North Central Texas Council of Governments.
The dam weathered major events such as the Great Flood of 1940s and regional droughts in the 1950s and 2010s that engaged agencies like the Bureau of Reclamation and state regulators in Texas Commission on Environmental Quality. Legal disputes invoked precedent from cases adjudicated in courts such as the Fifth Circuit Court of Appeals and occasionally referenced interpretations of the Clean Water Act in litigation over reservoir management.
Design work drew on practices established by the United States Army Corps of Engineers and private engineering firms like Sperry Corporation and Mott MacDonald consultants. Structural plans resembled features seen in Hoover Dam scale design studies, employing reinforced concrete and spillway geometry similar to works by John S. Eastwood-influenced designers. Contractors included firms with histories tied to Kellogg, Brown & Root and local builders from the Dallas Contractors Association.
Instrumentation and monitoring systems later incorporated technologies from General Electric and Siemens for turbine governors and from Honeywell for control systems. The original intake and outlet works reflected standards promoted by the American Society of Civil Engineers and newspapers of the era such as the Dallas Morning News reported on construction milestones and ribbon-cutting ceremonies attended by officials from the City of Dallas and Tarrant County.
The reservoir created by the dam altered flow regimes of the Brazos River and interacts with tributaries including the Clear Fork Trinity River and local creeks monitored by the National Oceanic and Atmospheric Administration in cooperation with the United States Geological Survey. Water-level fluctuations respond to seasonal precipitation patterns influenced by systems tracked by the National Weather Service, including impacts from Hurricane Harvey-related precipitation events and regional droughts assessed by the U.S. Drought Monitor.
Sedimentation studies were conducted by academic partners such as University of Texas at Austin and Texas A&M University and involved sediment transport models from USGS and hydraulic modeling tools developed by Hydrologic Engineering Center. Reservoir operations coordinate with flood forecasting by the National Weather Service River Forecast Center and water quality monitoring under programs administered by the Environmental Protection Agency and Texas Commission on Environmental Quality.
The hydroelectric facilities were outfitted with turbines and generators supplied by manufacturers including Allis-Chalmers and later retrofit components from Voith Hydro and General Electric. The plant interconnects with the Electric Reliability Council of Texas grid and has been subject to standards from the North American Electric Reliability Corporation. Operational planning involves regional utility entities such as Oncor Electric Delivery and market participation with entities like American Electric Power in ancillary services.
Maintenance and upgrades have been influenced by federal regulations under the Federal Energy Regulatory Commission and safety programs modeled after Federal Emergency Management Agency recommendations. Workforce training and certification have involved partnerships with institutions including Dallas College and industry groups such as the American Society of Mechanical Engineers and Institute of Electrical and Electronics Engineers.
Environmental assessments engaged agencies and organizations such as the U.S. Fish and Wildlife Service, Texas Parks and Wildlife Department, and conservation groups including the Nature Conservancy and Sierra Club. Impacts on native species referenced work by researchers at Texas A&M University and University of North Texas, with attention to species documented in lists maintained by the Texas Parks and Wildlife Department and affected by invasive species monitored by United States Geological Survey programs.
Mitigation measures have included habitat restoration projects coordinated with Trinity River Authority initiatives and water-quality improvement plans aligned with Environmental Protection Agency guidance. Studies published in journals affiliated with Society for Ecological Restoration and Ecological Society of America addressed changes in riparian vegetation, fish passage, and wetland function resulting from altered flow regimes.
The reservoir and adjacent lands provide recreational opportunities managed by local parks departments such as those of Mansfield, Texas and regional authorities including the Trinity River Authority. Nearby attractions include cultural venues in the Dallas–Fort Worth Metroplex such as AT&T Stadium, Six Flags Over Texas, and institutions like Dallas Museum of Art, drawing visitors who also use boat ramps and trails maintained in cooperation with Texas Parks and Wildlife Department.
Economic development around the site involves stakeholders like Tarrant County development agencies and chambers including the Dallas Regional Chamber. Recreational programming partners have included nonprofits such as the Boys & Girls Clubs of America and events coordinated with regional festivals like the State Fair of Texas. The area’s transportation access links to highways such as Interstate 20 and Loop 820.
Category:Dams in Texas