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| Lake Marble Falls | |
|---|---|
| Name | Lake Marble Falls |
| Location | Burnet County, Texas |
| Type | reservoir |
| Inflow | Colorado River |
| Outflow | Colorado River |
| Basin countries | United States |
| Area | 611acre |
| Volume | 7836acre.ft |
| Elevation | 738ft |
Lake Marble Falls is a reservoir on the Colorado River in Burnet County, Texas, formed by impoundment at Marble Falls Dam by the Lower Colorado River Authority. The lake lies adjacent to the city of Marble Falls and within the Texas Hill Country, serving roles in flood control, hydroelectric generation, and regional recreation. It connects hydrologically to a chain of reservoirs including Mansfield Dam (creating Lake Travis), Starcke Dam (creating Lake LBJ), and Wirtz Dam (creating Inks Lake).
Lake Marble Falls occupies a 611-acre surface area on the Colorado River upstream of Lake Lyndon B. Johnson and downstream of Inks Lake State Park and Inks Lake. The reservoir sits at an elevation near 738 feet above sea level in the Texas Hill Country, bordered by the city of Marble Falls, the community of Cottonwood Shores, and portions of Highland Lakes shoreline. Topographically the basin is underlain by Edwards Plateau limestone and karst features common to Burnet County, with nearby access provided by U.S. Route 281 and State Highway 71 corridors.
The impoundment that created Lake Marble Falls was constructed as part of the Lower Colorado River Authority system developed during the Great Depression era and expanded in mid-20th century regional water planning influenced by agencies such as the Tennessee Valley Authority model and New Deal infrastructure initiatives. The creation of dams on the Colorado River reshaped settlement patterns around Marble Falls and spurred growth tied to Travis County and Llano County economic shifts. Historic events affecting the reservoir include flood responses coordinated with Texas Water Development Board directives and regional droughts noted by National Weather Service records.
Hydrologic regime of the lake is governed by releases from upstream reservoirs such as Lake Travis and regulated by the Lower Colorado River Authority for purposes including hydroelectric generation at Marble Falls Dam, municipal water supply to systems serving Austin and San Antonio via interconnected projects, and flood mitigation for downstream communities like La Grange. The lake is part of the Highland Lakes chain, with inflow/outflow controlled through a series of dams: Mansfield Dam, Wirtz Dam, and Starcke Dam. Water allocations follow compacts and state statutes administered by the Texas Commission on Environmental Quality and records maintained by the U.S. Geological Survey stream gauging network. Sedimentation and reservoir capacity changes have been monitored in studies by University of Texas at Austin researchers and regional water planners.
The reservoir and surrounding riparian zones host assemblages typical of Central Texas reservoirs, including freshwater fish species such as Largemouth bass, striped bass, and Catfish supported by habitat in submerged woody debris and riprap. Birdlife includes migratory and resident species recorded by Audubon Society chapters and Texas Parks and Wildlife Department surveys, with sightings of Great blue heron, Bald eagle during winter concentrations, and passerines using shoreline vegetation. Aquatic plant communities and algal dynamics are influenced by nutrient loading from urban runoff in Marble Falls and upstream agricultural areas in Burnet County. Native riparian trees such as Bald cypress and Live oak line portions of the shore where karst springs and seeps occur.
Lake Marble Falls is a focal point for regional recreation promoted by Marble Falls tourism bureaus and Burnet County Tourism initiatives, offering boating, angling, and waterfront events like festivals associated with the Highland Lakes. Marinas and public access points are managed in coordination with the Lower Colorado River Authority and local park agencies; nearby attractions include Longhorn Cavern State Park, Inks Lake State Park, and the Balcones Canyonlands National Wildlife Refuge, linking terrestrial recreation such as hiking and birding to lake-based activities. Hospitality services in Marble Falls, including lodges and restaurants, market the lake alongside regional wine trails and Texas Hill Country Wine Trail destinations.
Environmental concerns include episodic algal blooms monitored by the Texas Commission on Environmental Quality, turbidity increases from stormwater runoff regulated under Clean Water Act programs administered by the U.S. Environmental Protection Agency, and invasive species management coordinated with the Texas Parks and Wildlife Department. Conservation efforts engage local stakeholders, nonprofit organizations such as Texas Parks and Wildlife Foundation partners, and academic researchers from Texas State University and University of Texas at Austin who study water quality, habitat restoration, and shoreline erosion control. Regional climate variability evident in National Climate Assessment findings informs drought contingency planning and reservoir operations.
Infrastructure around the lake includes Marble Falls Dam hydropower facilities operated by the Lower Colorado River Authority, municipal water connections serving Marble Falls and adjacent communities, and transportation links via U.S. 281 and State Highway 71. Development pressures from residential waterfront construction and commercial growth in the Texas Hill Country have prompted land-use planning by Burnet County officials and zoning coordination with the City of Marble Falls. Engineering projects addressing shoreline stabilization, marina improvements, and wastewater systems involve contractors and consultants familiar with Federal Emergency Management Agency floodplain standards and Texas Department of Transportation project permitting.
Category:Lakes of Texas Category:Reservoirs in Texas Category:Burnet County, Texas