Falcon Reservoir: 9.1% full as of 2023-09-30

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)
Most recent 2023-09-30 9.1 256.92 368,679 140,808 1,551,007 23,876
1 day prior 2023-09-29 9.1 256.94 369,255 141,028 1,551,007 23,904
2 days prior 2023-09-28 9.1 256.95 369,431 141,095 1,551,007 23,911
1 week prior 2023-09-23 9.4 257.32 378,683 145,691 1,551,007 24,343
1 month prior 2023-08-30 10.4 258.40 405,952 161,020 1,551,007 25,609
3 months prior 2023-06-30 16.9 262.98 537,133 261,657 1,551,007 30,800
6 months prior 2023-03-30 10.4 254.13 306,706 161,627 1,551,007 20,608
1 year prior 2022-09-30 16.1 261.76 500,176 249,247 1,551,007 29,440
*

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

Date/time Water Level
(ft)
Conservation Pool Elevation
(ft)
Height Above Conservation Pool
(ft)
Most recent 2023-10-01 02:15 256.87 301.10 -44.23
1 hour prior 2023-10-01 01:15 256.87 301.10 -44.23
2 hours prior 2023-10-01 00:15 256.87 301.10 -44.23
6 hours prior 2023-09-30 20:15 256.89 301.10 -44.21
12 hours prior 2023-09-30 14:15 256.92 301.10 -44.18
24 hours prior 2023-09-30 02:15 256.92 301.10 -44.18
48 hours prior 2023-09-29 02:15 256.94 301.10 -44.16
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Gauge IBWC:08-4612.00
Vertical datum NGVD29
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