Sam Rayburn Reservoir: 89.1% full as of 2017-12-18

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 2017-12-18 89.1 161.54 2,563,756 2,544,800 2,857,077 105,172
Yesterday 2017-12-17 89.0 161.51 2,560,601 2,541,645 2,857,077 105,113
2 days ago 2017-12-16 89.0 161.51 2,560,601 2,541,645 2,857,077 105,113
1 week ago 2017-12-11 89.8 161.74 2,584,825 2,565,869 2,857,077 105,566
1 month ago 2017-11-18 93.4 162.71 2,688,241 2,669,285 2,857,077 109,609
3 months ago 2017-09-18 100.0 165.67 3,020,385 2,857,077 2,857,077 - n.a. -
6 months ago 2017-06-18 100.0 164.59 2,897,465 2,857,077 2,857,077 - n.a. -
1 year ago 2016-12-18 88.8 161.47 2,556,396 2,537,440 2,857,077 105,033
*

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 2017-12-18 12:00 161.53 164.4 -2.9 below flood pool
1 hour prior 2017-12-18 11:00 161.54 164.4 -2.9 below flood pool
2 hours prior 2017-12-18 10:00 161.55 164.4 -2.8 below flood pool
6 hours prior 2017-12-18 06:00 161.56 164.4 -2.8 below flood pool
12 hours prior 2017-12-18 00:00 161.54 164.4 -2.9 below flood pool
24 hours prior 2017-12-17 12:00 161.51 164.4 -2.9 below flood pool
48 hours prior 2017-12-16 12:00 161.51 164.4 -2.9 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1965-01-01
Vertical datum NGVD29
Gauge USGS:08039300
Dead pool elevation 105.0 ft above NGVD29
Emergency spillway crest elevation 176.0 ft above NGVD29
Flood pool elevation 173.0 ft above NGVD29
Maximum design elevation 183.0 ft above NGVD29
Top of dam elevation 193.6 ft above NGVD29
Conservation pool elevation 164.4 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1965-01-01 (source: usgs)
2004-04-01 (source: twdb) : GIS Data

Lake Location