Granger Lake: 98.4% 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 | 98.4 | 503.80 | 51,005 | 51,005 | 51,822 | 4,062 |
| Yesterday | 2026-10-23 | 98.5 | 503.81 | 51,046 | 51,046 | 51,822 | 4,064 |
| 2 days ago | 2026-10-22 | 98.6 | 503.82 | 51,087 | 51,087 | 51,822 | 4,067 |
| 1 week ago | 2026-10-17 | 98.9 | 503.86 | 51,250 | 51,250 | 51,822 | 4,077 |
| 1 month ago | 2026-09-24 | 98.2 | 503.77 | 50,884 | 50,884 | 51,822 | 4,055 |
| 3 months ago | 2026-07-24 | 100.0 | 506.17 | 61,247 | 51,822 | 51,822 | - n.a. - |
| 6 months ago | 2026-04-24 | 100.0 | 508.02 | 70,097 | 51,822 | 51,822 | - n.a. - |
| 1 year ago | 2025-10-24 | 94.6 | 503.31 | 49,042 | 49,042 | 51,822 | 3,955 |
*
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 18:45 | 503.79 | 504.00 | -0.21 |
| 1 hour prior | 2026-10-24 17:45 | 503.79 | 504.00 | -0.21 |
| 2 hours prior | 2026-10-24 16:45 | 503.79 | 504.00 | -0.21 |
| 6 hours prior | 2026-10-24 12:45 | 503.80 | 504.00 | -0.20 |
| 12 hours prior | 2026-10-24 06:45 | 503.80 | 504.00 | -0.20 |
| 24 hours prior | 2026-10-23 18:45 | 503.80 | 504.00 | -0.20 |
| 48 hours prior | 2026-10-22 18:45 | 503.81 | 504.00 | -0.19 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1979-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 457.00 ft above NGVD29 |
| Emergency spillway crest elevation | 528.00 ft above NGVD29 |
| Flood pool elevation | 528.00 ft above NGVD29 |
| Maximum design elevation | 550.30 ft above NGVD29 |
| Top of dam elevation | 555.00 ft above NGVD29 |
| Conservation pool elevation | 504.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1979-01-01 (source: USGS)
2008-08-01 (source: TWDB)
: GIS Data
2013-03-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08105600 |
| USGS Monitoring Location | USGS:08105600 |
Lake Location
