Granger Lake: 99.0% full as of 2026-10-04
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 | 2026-10-04 | 99.0 | 503.87 | 51,290 | 51,290 | 51,822 | 4,079 |
| Yesterday | 2026-10-03 | 98.4 | 503.80 | 51,005 | 51,005 | 51,822 | 4,062 |
| 2 days ago | 2026-10-02 | 97.9 | 503.73 | 50,722 | 50,722 | 51,822 | 4,045 |
| 1 week ago | 2026-09-27 | 97.7 | 503.71 | 50,641 | 50,641 | 51,822 | 4,041 |
| 1 month ago | 2026-09-04 | 100.0 | 504.13 | 52,358 | 51,822 | 51,822 | - n.a. - |
| 3 months ago | 2026-07-04 | 100.0 | 505.68 | 59,029 | 51,822 | 51,822 | - n.a. - |
| 6 months ago | 2026-04-04 | 100.0 | 504.35 | 53,273 | 51,822 | 51,822 | - n.a. - |
| 1 year ago | 2025-10-04 | 98.1 | 503.76 | 50,843 | 50,843 | 51,822 | 4,052 |
*
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 | 2026-10-04 13:00 | 503.90 | 504.00 | -0.10 |
| 1 hour prior | 2026-10-04 12:00 | 503.89 | 504.00 | -0.11 |
| 2 hours prior | 2026-10-04 11:00 | 503.88 | 504.00 | -0.12 |
| 6 hours prior | 2026-10-04 07:00 | 503.87 | 504.00 | -0.13 |
| 12 hours prior | 2026-10-04 01:00 | 503.86 | 504.00 | -0.14 |
| 24 hours prior | 2026-10-03 13:00 | 503.81 | 504.00 | -0.19 |
| 48 hours prior | 2026-10-02 13:00 | 503.73 | 504.00 | -0.27 |
*
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
