Amistad Reservoir: 79.5% full as of 2017-03-26
Lake Amistad straddles the border of Texas and Mexico. By treaty, Texas has rights 56.2% of the total conservation capacity. The fraction of the actual storage that belongs to Texas is formally determined biweekly by the International Boundary Water Commission (IBWC). The IBWC is the legal repository of data related to this lake for treaty purposes and official versions of the datasets should be obtained directly from them. Conservation capacity is based on 56.2% of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas fraction. 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.
Mean Water Level
|2 days ago||2017-03-24||79.6||1,095.75||2,096,478||1,465,758||1,840,849||- n.a. -|
|1 week ago||2017-03-19||79.9||1,095.92||2,104,167||1,471,134||1,840,849||48,077|
|1 month ago||2017-02-26||81.6||1,096.49||2,130,924||1,501,941||1,840,849||48,525|
|3 months ago||2016-12-26||84.2||1,100.56||2,331,295||1,549,597||1,840,849||51,781|
|6 months ago||2016-09-26||82.3||1,098.61||2,233,354||1,515,666||1,840,849||50,209|
|1 year ago||2016-03-26||74.8||1,092.55||1,950,140||1,376,188||1,840,849||45,440|
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
| Conservation Pool Elevation
Height Above Conservation Pool
|Most recent||2017-03-26 05:15||1,095.68||1,117.0||-21.3|
|1 hour prior||2017-03-26 04:15||1,095.68||1,117.0||-21.3|
|2 hours prior||2017-03-26 03:15||1,095.69||1,117.0||-21.3|
|6 hours prior||2017-03-25 23:15||- n.a. -||- n.a. -||- n.a. -|
|12 hours prior||2017-03-25 17:15||- n.a. -||- n.a. -||- n.a. -|
|24 hours prior||2017-03-25 05:15||1,095.74||1,117.0||-21.3|
|48 hours prior||2017-03-24 05:15||1,095.77||1,117.0||-21.2|
Data is provisional and subject to revision.
|Dead pool elevation||930.0 ft above NGVD29|
|Service spillway crest elevation||1086.4 ft above NGVD29|
|Conservation pool elevation||1117.0 ft above NGVD29|
|Volume under conservation pool elevation||3275532 ac-ft|
|Top of flood gate elevation||1140.4 ft above NGVD29|
|Emergency spillway crest elevation||1140.4 ft above NGVD29|
|Flood pool elevation||1140.4 ft above NGVD29|
|Maximum design elevation||1145.12 ft above NGVD29|
|Top of dam elevation||1152.3 ft above NGVD29|
|Data download (CSV)||period of record, last one year, last 30 days|