recent changes

2013-02-12: The rating curve for this reservoir has been updated and replaced with data from the Texas Water Development Board's Report 126.

Toledo Bend Reservoir is 100.0% full as of 2016-05-26

Toledo Bend Reservoir straddles the border of Texas and Louisiana, Texas has rights to 50% of Toledo Bend Reservoir's total conservation capacity. Percent full, conservation storage and conservation capacity are based on the Texas share. 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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Today 2016-05-26 100.0 172.19 4,524,506 2,236,450 2,236,450 183,410
Yesterday 2016-05-25 100.0 172.23 4,531,672 2,236,450 2,236,450 183,603
2 days ago 2016-05-24 100.0 172.29 4,542,485 2,236,450 2,236,450 183,893
1 week ago 2016-05-19 100.0 172.68 4,611,532 2,236,450 2,236,450 185,628
1 month ago 2016-04-26 100.0 172.45 4,571,449 2,236,450 2,236,450 184,651
3 months ago 2016-02-26 99.3 171.73 4,446,816 2,221,358 2,236,450 181,203
6 months ago 2015-11-26 96.5 171.00 4,321,577 2,158,738 2,236,450 177,724
1 year ago 2015-05-26 100.0 172.35 4,553,376 2,236,450 2,236,450 184,180
*

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 2016-05-26 20:30 172.20 172.0 0.2 into flood pool
1 hour prior 2016-05-26 19:30 172.20 172.0 0.2 into flood pool
2 hours prior 2016-05-26 18:30 172.20 172.0 0.2 into flood pool
6 hours prior 2016-05-26 14:30 172.20 172.0 0.2 into flood pool
12 hours prior 2016-05-26 08:30 172.20 172.0 0.2 into flood pool
24 hours prior 2016-05-25 20:30 172.20 172.0 0.2 into flood pool
48 hours prior 2016-05-24 20:30 172.20 172.0 0.2 into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
Vertical datum NGVD29
Gauge USGS:08025350
Dead pool elevation 100.0 ft above NGVD29
Service spillway crest elevation 145 ft above NGVD29
Conservation pool elevation 172.0 ft above NGVD29
Top of flood gate elevation 173 ft above NGVD29
Emergency spillway crest elevation 173 ft above NGVD29
Maximum design elevation 175.3 ft above NGVD29
Top of dam elevation 185 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: twdb)