How deep is my lake?

by The Brazos River Authority

Periodically, officials conduct a survey of lakes within the Brazos basin to determine each lake’s volume. As part of that work, survey crews determine each lake’s depth (in feet). Do not confuse this measurement with lake level, however.

 

A lake’s depth is the distance from the lake’s bottom to the top of the conservation pool, the point where the lake is considered full. The lake level is the number of feet the surface is above mean sea level. 

 

Crews use a combination of GPS technology and sonar to find the lake’s depth at various points to get an average to determine volume. The sonar sends sound waves to the lake bottom at different frequencies, and the results are compared to help also determine how much sediment has collected. The surveys also find each lake’s deepest point, which is typically near the dam.

 

The following lakes are in the Authority system:

Reservoir

Avg. depth (feet)

Deepest point (feet)

Belton

35

112

Stillhouse Hollow        

35

110

Possum Kingdom      

32

106

Whitney

24

100

Georgetown

29

80

Granbury

16

67

Limestone

17

44

Aquilla

15

40

Somerville

13

35

Granger

12

35

Proctor

12

33

 

 

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| Lake Levels | Reservoirs
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About us

The Brazos River Authority was created by the Texas Legislature in 1929 as the first state agency in the country with the purpose of developing and managing the water resources of an entire river basin. Today, the Authority develops and distributes water supplies, provides water and wastewater treatment, monitors water quality, and pursues water conservation through public education programs. Although the Authority is an agency of the state, it does not levy or collect taxes and is entirely self-supporting.

 

The information provided on this site is intended as background on water within the Brazos River basin. There should be no expectation that this information is all encompassing, complete or in any way examines every aspect of this very complex natural resource. 

 

We invite you to post comments and expect they will be made in good taste. The Authority reserves the right to reject or remove any comment that is not constructive in the education of the general public on issues regarding water in the Brazos basin.