Falcon Reservoir: 20.7% full as of 2021-09-25

Lake Falcon straddles the border of Texas and Mexico. By treaty, Texas has rights 58.6% 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 58.6% of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas share.

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 2021-09-25 20.7 259.42 431,985 321,571 1,551,007 26,776
Yesterday 2021-09-24 20.8 259.48 433,612 322,783 1,551,007 26,844
2 days ago 2021-09-23 20.8 259.47 433,486 322,689 1,551,007 26,839
1 week ago 2021-09-18 21.2 259.82 443,211 329,185 1,551,007 27,237
1 month ago 2021-08-25 24.3 261.45 490,993 376,573 1,551,007 29,089
3 months ago 2021-06-25 25.5 260.41 460,182 394,846 1,551,007 27,904
6 months ago 2021-03-25 23.8 259.58 436,532 368,819 1,551,007 26,963
1 year ago 2020-09-25 28.6 263.82 563,950 443,767 1,551,007 31,737
*

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 2021-09-25 07:15 259.42 301.10 -41.68 below flood pool
1 hour prior 2021-09-25 06:15 259.42 301.10 -41.68 below flood pool
2 hours prior 2021-09-25 05:15 259.42 301.10 -41.68 below flood pool
6 hours prior 2021-09-25 01:15 259.42 301.10 -41.68 below flood pool
12 hours prior 2021-09-24 19:15 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2021-09-24 07:15 259.48 301.10 -41.62 below flood pool
48 hours prior 2021-09-23 07:15 259.47 301.10 -41.63 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Vertical datum NGVD29
Gauge IBWC:08-4612.00
Dead pool elevation 204.34 ft above NGVD29
Service spillway crest elevation 256.70 ft above NGVD29
Volume under conservation pool elevation 2,646,817.00 ac-ft
Dead pool volume 47.00 ac-ft
Top of flood gate elevation 306.70 ft above NGVD29
Emergency spillway crest elevation 306.70 ft above NGVD29
Maximum design elevation 314.20 ft above NGVD29
Top of dam elevation 323.00 ft above NGVD29
Conservation pool elevation 301.10 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Lake Location