Lake Granbury: 86.2% full as of 2026-10-02

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 2026-10-02 86.2 690.33 115,515 114,606 132,949 7,308
Yesterday 2026-10-01 85.3 690.17 114,350 113,441 132,949 7,249
2 days ago 2026-09-30 83.9 689.91 112,477 111,568 132,949 7,163
1 week ago 2026-09-25 84.9 690.10 113,843 112,934 132,949 7,224
1 month ago 2026-09-02 88.7 690.78 118,840 117,931 132,949 7,472
3 months ago 2026-07-02 98.2 692.41 131,504 130,595 132,949 8,066
6 months ago 2026-04-02 98.5 692.45 131,827 130,918 132,949 8,081
1 year ago 2025-10-02 95.1 691.89 127,358 126,449 132,949 7,877
*

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 2026-10-02 00:00 690.33 692.70 -2.37 below operating pool
1 hour prior 2026-10-01 23:00 690.32 692.70 -2.38 below operating pool
2 hours prior 2026-10-01 22:00 690.31 692.70 -2.39 below operating pool
6 hours prior 2026-10-01 18:00 690.31 692.70 -2.39 below operating pool
12 hours prior 2026-10-01 12:00 690.31 692.70 -2.39 below operating pool
24 hours prior 2026-10-01 00:00 689.87 692.70 -2.83 below operating pool
48 hours prior 2026-09-30 00:00 689.91 692.70 -2.79 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