Lake Brownwood: 81.3% full as of 2026-05-18

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Today 2026-05-18 81.3 1,421.07 106,339 106,339 130,868 6,006
Yesterday 2026-05-17 81.3 1,421.08 106,399 106,399 130,868 6,008
2 days ago 2026-05-16 81.4 1,421.10 106,519 106,519 130,868 6,012
1 week ago 2026-05-11 81.9 1,421.20 107,121 107,121 130,868 6,032
1 month ago 2026-04-18 82.6 1,421.37 108,150 108,150 130,868 6,067
3 months ago 2026-02-18 83.2 1,421.48 108,819 108,819 130,868 6,090
6 months ago 2025-11-18 85.0 1,421.88 111,271 111,271 130,868 6,172
1 year ago 2025-05-18 100.0 1,425.05 131,871 130,868 130,868 6,824
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft) 		Conservation Pool Elevation
(ft) 		Height Above Conservation Pool
(ft)
Most recent 2026-05-18 22:30 1,421.06 1,424.90 -3.84
1 hour prior 2026-05-18 21:30 1,421.06 1,424.90 -3.84
2 hours prior 2026-05-18 20:30 1,421.07 1,424.90 -3.83
6 hours prior 2026-05-18 16:30 1,421.06 1,424.90 -3.84
12 hours prior 2026-05-18 10:30 1,421.07 1,424.90 -3.83
24 hours prior 2026-05-17 22:30 1,421.07 1,424.90 -3.83
48 hours prior 2026-05-16 22:30 1,421.09 1,424.90 -3.81
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1933-01-01
Vertical datum
Start date: 2022-05-21 		NAVD88
Vertical datum
Start date to end date: 1999-02-24 to 2022-05-20 		NGVD29
Dead pool elevation
Start date: 1959-01-01 		1,329.50 ft above NGVD29
Dead pool elevation
End date: 1959-01-01 		1,405.50 ft above NGVD29
Emergency spillway crest elevation 1,425.00 ft above NAVD88
Top of dam elevation 1,470.00 ft above NAVD88
Conservation pool elevation 1,424.60 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1997-04-01 (source: TWDB) : GIS Data
2013-06-01 (source: TWDB) : GIS Data
Data Source USGS:08143000

Lake Location