Eagle Mountain Reservoir: 71.8% full as of 2026-09-21

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 2026-09-21 71.8 642.84 132,858 132,858 185,087 7,588
Yesterday 2026-09-20 71.9 642.86 133,010 133,010 185,087 7,593
2 days ago 2026-09-19 72.0 642.90 133,314 133,314 185,087 7,602
1 week ago 2026-09-14 73.1 643.16 135,298 135,298 185,087 7,664
1 month ago 2026-08-21 77.6 644.22 143,545 143,545 185,087 7,885
3 months ago 2026-06-21 95.6 648.20 176,900 176,900 185,087 8,947
6 months ago 2026-03-21 84.1 645.73 155,716 155,716 185,087 8,247
1 year ago 2025-09-21 90.3 647.08 167,083 167,083 185,087 8,596
*

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 2026-09-21 13:00 642.82 649.10 -6.28 below flood pool
1 hour prior 2026-09-21 12:00 642.83 649.10 -6.27 below flood pool
2 hours prior 2026-09-21 11:00 642.82 649.10 -6.28 below flood pool
6 hours prior 2026-09-21 07:00 642.83 649.10 -6.27 below flood pool
12 hours prior 2026-09-21 01:00 642.83 649.10 -6.27 below flood pool
24 hours prior 2026-09-20 13:00 642.84 649.10 -6.26 below flood pool
48 hours prior 2026-09-19 13:00 642.91 649.10 -6.19 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1932-01-01
Vertical datum
Start date: 2016-10-01 		NAVD88
Vertical datum
End date: 2016-10-01 		NGVD29
Dead pool elevation 599.90 ft above NGVD29
Service spillway crest elevation 637.00 ft above NGVD29
Service spillway crest elevation 649.10 ft above NGVD29
Top of flood gate elevation 659.00 ft above NGVD29
Emergency spillway crest elevation 676.00 ft above NGVD29
Flood pool elevation 668.00 ft above NGVD29
Maximum design elevation 680.23 ft above NGVD29
Top of dam elevation 682.00 ft above NGVD29
Conservation pool elevation 649.10 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1932-01-01 (source: USGS)
2003-09-30 (source: USGS)
2008-02-01 (source: TWDB) : GIS Data
2018-10-01 (source: TWDB) : GIS Data
Data Source USGS:08045000
USGS Monitoring Location USGS:08045000

Lake Location