Lake Granbury: 87.4% full as of 2026-09-11

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 2026-09-11 87.4 690.54 117,057 116,148 132,949 7,384
Yesterday 2026-09-10 87.5 690.56 117,205 116,296 132,949 7,392
2 days ago 2026-09-09 87.6 690.59 117,427 116,518 132,949 7,403
1 week ago 2026-09-04 88.4 690.73 118,467 117,558 132,949 7,454
1 month ago 2026-08-11 91.2 691.22 122,163 121,254 132,949 7,632
3 months ago 2026-06-11 99.0 692.54 132,556 131,647 132,949 8,114
6 months ago 2026-03-11 99.4 692.61 133,124 132,215 132,949 8,139
1 year ago 2025-09-11 97.0 692.21 129,898 128,989 132,949 7,993
*

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 2026-09-11 22:15 690.56 692.70 -2.14 below operating pool
1 hour prior 2026-09-11 21:15 690.56 692.70 -2.14 below operating pool
2 hours prior 2026-09-11 20:15 690.50 692.70 -2.20 below operating pool
6 hours prior 2026-09-11 16:15 690.50 692.70 -2.20 below operating pool
12 hours prior 2026-09-11 10:15 690.55 692.70 -2.15 below operating pool
24 hours prior 2026-09-10 22:15 690.55 692.70 -2.15 below operating pool
48 hours prior 2026-09-09 22:15 690.58 692.70 -2.12 below operating pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
Vertical datum NGVD29 -1.11
Dead pool elevation 640.00 ft above NGVD29 -1.11
Service spillway crest elevation 658.00 ft above NGVD29 -1.11
Emergency spillway crest elevation 693.00 ft above NGVD29 -1.11
Top of dam elevation 706.50 ft above NGVD29 -1.11
Conservation pool elevation 692.70 ft above NGVD29 -1.11
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1969-01-01 (source: TWDB)
1993-10-01 (source: TWDB) : GIS Data
2003-07-01 (source: TWDB) : GIS Data
2015-06-01 (source: TWDB) : GIS Data
Data Source USGS:08090900
USGS Monitoring Location USGS:08090900

Lake Location