Falcon Reservoir: 14.7% full as of 2025-05-25

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 2025-05-25 14.7 254.30 293,066 229,480 1,562,367 20,118
Yesterday 2025-05-24 14.7 254.35 294,193 230,363 1,562,367 20,175
2 days ago 2025-05-23 14.9 254.48 296,745 232,362 1,562,367 20,301
1 week ago 2025-05-18 15.2 254.83 304,138 238,151 1,562,367 20,666
1 month ago 2025-04-25 14.9 256.12 331,482 232,732 1,562,367 22,017
3 months ago 2025-02-25 15.8 255.76 323,636 247,188 1,562,367 21,633
6 months ago 2024-11-25 13.0 255.75 323,453 203,408 1,562,367 21,624
1 year ago 2024-05-25 9.5 251.46 239,662 149,014 1,562,367 17,607
*

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 2025-05-25 20:00 254.25 301.20 -46.95
1 hour prior 2025-05-25 19:00 254.26 301.20 -46.94
2 hours prior 2025-05-25 18:00 254.27 301.20 -46.93
6 hours prior 2025-05-25 14:00 254.28 301.20 -46.92
12 hours prior 2025-05-25 08:00 254.31 301.20 -46.89
24 hours prior 2025-05-24 20:00 254.31 301.20 -46.89
48 hours prior 2025-05-23 20:00 254.43 301.20 -46.77
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Vertical datum NGVD29
Dead pool elevation 204.34 ft above NGVD29
Volume under conservation pool elevation
Start date: 2023-10-01 		2,666,203.00 ac-ft
Volume under conservation pool elevation
End date: 2023-09-30 		2,646,817.00 ac-ft
Dead pool volume 47.00 ac-ft
Top of gate 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
Start date: 2023-10-01 		301.20 ft above NGVD29
Conservation pool elevation
End date: 2023-09-30 		301.10 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2014-01-01 (source: IBWC)
Data Source IBWC:08-4612.00

Lake Location