Recent changes

2013-06-21: Per discussions with the USGS, the vertical datums of the TWDB 1994 rating curve and conservation and dead pool elevations have been adjusted to NGVD29-0.7ft. The Oct. 1st, 2009 USGS datum change to NAVD88 is correctly accounted for. Data prior to Oct. 1st 2009 are currently unavailable, pending correction.

Lake Houston: 100.0% full as of 2017-08-20

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, while 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 2017-08-20 100.0 42.39 131,509 120,686 120,686 - n.a. -
Yesterday 2017-08-19 100.0 42.41 131,721 120,686 120,686 - n.a. -
2 days ago 2017-08-18 100.0 42.43 131,935 120,686 120,686 - n.a. -
1 week ago 2017-08-13 100.0 42.44 132,042 120,686 120,686 - n.a. -
1 month ago 2017-07-20 100.0 42.52 132,899 120,686 120,686 - n.a. -
3 months ago 2017-05-20 100.0 41.92 126,602 120,686 120,686 10,272
6 months ago 2017-02-20 100.0 42.60 133,763 120,686 120,686 - n.a. -
1 year ago 2016-08-20 100.0 42.81 136,057 120,686 120,686 - 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 2017-08-20 21:30 42.36 41.7 0.6 into flood pool
1 hour prior 2017-08-20 20:30 42.36 41.7 0.6 into flood pool
2 hours prior 2017-08-20 19:30 42.36 41.7 0.6 into flood pool
6 hours prior 2017-08-20 15:30 42.36 41.7 0.6 into flood pool
12 hours prior 2017-08-20 09:30 42.38 41.7 0.7 into flood pool
24 hours prior 2017-08-19 21:30 42.41 41.7 0.7 into flood pool
48 hours prior 2017-08-18 21:30 42.40 41.7 0.7 into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Vertical datum NAVD88
Gauge USGS:08072000
Dead pool elevation 19.23 ft above NAVD88
Service spillway crest elevation 41.73 ft above NAVD88
Conservation pool elevation 41.73 ft above NAVD88
Top of flood gate elevation 45.73 ft above NAVD88
Emergency spillway crest elevation 41.73 ft above NAVD88
Maximum design elevation 54.23 ft above NAVD88
Top of dam elevation 60.23 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

Lake Location