Lake Houston: 88.9% full as of 2025-03-20

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 2025-03-20 88.9 41.06 121,400 117,599 132,318 10,859
Yesterday 2025-03-19 88.4 41.00 120,749 116,948 132,318 10,833
2 days ago 2025-03-18 87.5 40.89 119,560 115,759 132,318 10,787
1 week ago 2025-03-13 87.4 40.88 119,452 115,651 132,318 10,782
1 month ago 2025-02-20 88.5 41.02 120,966 117,165 132,318 10,842
3 months ago 2024-12-20 100.0 42.40 136,349 132,318 132,318 - n.a. -
6 months ago 2024-09-20 99.8 42.36 135,891 132,090 132,318 11,434
1 year ago 2024-03-20 100.0 42.47 137,151 132,318 132,318 - n.a. -
*

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 2025-03-20 10:30 41.08 42.38 -1.30
1 hour prior 2025-03-20 09:30 41.02 42.38 -1.36
2 hours prior 2025-03-20 08:30 41.01 42.38 -1.37
6 hours prior 2025-03-20 04:30 41.05 42.38 -1.33
12 hours prior 2025-03-19 22:30 41.08 42.38 -1.30
24 hours prior 2025-03-19 10:30 40.93 42.38 -1.45
48 hours prior 2025-03-18 10:30 40.83 42.38 -1.55
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Vertical datum NAVD88
Dead pool elevation 19.23 ft above NAVD88
Service spillway crest elevation 42.38 ft above NAVD88
Top of gate elevation 45.73 ft above NAVD88
Emergency spillway crest elevation 42.38 ft above NAVD88
Maximum design elevation 54.23 ft above NAVD88
Top of dam elevation 60.23 ft above NAVD88
Conservation pool elevation
Start date: 2011-12-01 		42.38 ft above NAVD88
Conservation pool elevation
End date: 2011-12-01 		41.73 ft above NAVD88
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1994-02-01 (source: TWDB) : GIS Data
2011-12-01 (source: TWDB) : GIS Data
2018-06-01 (source: TWDB) : GIS Data
Data Source USGS:08072000

Lake Location