Medina Lk Nr San Antonio Reservoir Report

Medina Lake, located near San Antonio, Texas, was created in the early 1900s as a result of the Medina Dam construction on the Medina River. Updated daily.

Last Updated: November 13, 2025

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The lake has a surface area of 5,575 acres and a capacity of 254,000 acre-feet. The primary source of water for the lake is the Medina River, with additional inflows from Parker Creek and Black Creek. The lake serves as a source of drinking water and irrigation for surrounding agricultural areas. The lake also provides recreational activities such as fishing, boating, and swimming. The lake's hydrology is affected by the area's frequent droughts and the amount of snowpack in the surrounding regions. During droughts, the lake's water levels can drop significantly, impacting its recreational and agricultural uses.

Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft 24hr Change 0.0%
Percent of Normal 97%
Minimum 968.7 ft
2025-05-23
Maximum 1,065.89 ft
2016-06-03
Average 1,021 ft
Dam_Height 165
Hydraulic_Height 165
Drainage_Area 634
Years_Modified 2012 - Structural
Year_Completed 1913
Nid_Storage 327250
Structural_Height 165
Foundations Soil
Surface_Area 5575
Outlet_Gates Uncontrolled - 1, Vertical Lift - 5
River_Or_Stream MEDINA RIVER
Dam_Length 1550
Hazard_Potential Not Available
Primary_Dam_Type Gravity
Nid_Height 165

Reservoir Details

       
Seasonal Comparison
Precipitation, Total, In Levels
Reservoir Storage, Acre-Ft Levels
Lake Or Reservoir Water Surface Elevation Above Ngvd 1929, Ft Levels

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