Lake Graham: 66.3% full as of 2026-10-24

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 2026-10-24 66.3 1,068.11 30,019 30,005 45,288 1,932
Yesterday 2026-10-23 66.4 1,068.14 30,078 30,064 45,288 1,935
2 days ago 2026-10-22 66.4 1,068.15 30,097 30,083 45,288 1,935
1 week ago 2026-10-17 66.8 1,068.23 30,252 30,238 45,288 1,942
1 month ago 2026-09-24 65.0 1,067.82 29,463 29,449 45,288 1,908
3 months ago 2026-07-24 74.3 1,069.93 33,669 33,655 45,288 2,082
6 months ago 2026-04-24 79.7 1,071.07 36,106 36,092 45,288 2,175
1 year ago 2025-10-24 83.3 1,071.81 37,757 37,743 45,288 2,225
*

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 2026-10-24 18:00 1,068.11 1,075.00 -6.89
1 hour prior 2026-10-24 17:00 1,068.09 1,075.00 -6.91
2 hours prior 2026-10-24 16:00 1,068.09 1,075.00 -6.91
6 hours prior 2026-10-24 12:00 1,068.11 1,075.00 -6.89
12 hours prior 2026-10-24 06:00 1,068.11 1,075.00 -6.89
24 hours prior 2026-10-23 18:00 1,068.13 1,075.00 -6.87
48 hours prior 2026-10-22 18:00 1,068.15 1,075.00 -6.85
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1958-01-01
Vertical datum NGVD29 +1.3
Dead pool elevation 1,030.00 ft above NGVD29 +1.3
Service spillway crest elevation 1,076.30 ft above NGVD29
Top of dam elevation 1,093.30 ft above NGVD29
Conservation pool elevation 1,075.00 ft above NGVD29 +1.3
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1958-01-01 (source: USGS)
1998-04-01 (source: TWDB) : GIS Data
Data Source USGS:08088400
USGS Monitoring Location USGS:08088400

Lake Location