Lake Graham: 67.2% full as of 2026-09-07

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 2026-09-07 67.2 1,068.32 30,427 30,413 45,288 1,949
Yesterday 2026-09-06 67.3 1,068.35 30,486 30,472 45,288 1,951
2 days ago 2026-09-05 67.5 1,068.39 30,564 30,550 45,288 1,954
1 week ago 2026-08-31 68.1 1,068.54 30,858 30,844 45,288 1,966
1 month ago 2026-08-07 72.2 1,069.46 32,701 32,687 45,288 2,041
3 months ago 2026-06-07 76.9 1,070.49 34,851 34,837 45,288 2,134
6 months ago 2026-03-07 77.0 1,070.50 34,872 34,858 45,288 2,135
1 year ago 2025-09-07 89.1 1,072.94 40,350 40,336 45,288 2,303
*

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 2026-09-07 13:00 1,068.32 1,075.00 -6.68
1 hour prior 2026-09-07 12:00 1,068.33 1,075.00 -6.67
2 hours prior 2026-09-07 11:00 1,068.32 1,075.00 -6.68
6 hours prior 2026-09-07 07:00 1,068.32 1,075.00 -6.68
12 hours prior 2026-09-07 01:00 1,068.33 1,075.00 -6.67
24 hours prior 2026-09-06 13:00 1,068.36 1,075.00 -6.64
48 hours prior 2026-09-05 13:00 1,068.38 1,075.00 -6.62
*

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