Granger Lake: 99.9% full as of 2026-09-13
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 | 2026-09-13 | 99.9 | 503.99 | 51,781 | 51,781 | 51,822 | 4,152 |
| Yesterday | 2026-09-12 | 100.0 | 504.01 | 51,864 | 51,822 | 51,822 | - n.a. - |
| 2 days ago | 2026-09-11 | 100.0 | 504.02 | 51,905 | 51,822 | 51,822 | - n.a. - |
| 1 week ago | 2026-09-06 | 100.0 | 504.10 | 52,234 | 51,822 | 51,822 | - n.a. - |
| 1 month ago | 2026-08-13 | 100.0 | 504.88 | 55,520 | 51,822 | 51,822 | - n.a. - |
| 3 months ago | 2026-06-13 | 100.0 | 508.98 | 74,985 | 51,822 | 51,822 | - n.a. - |
| 6 months ago | 2026-03-13 | 100.0 | 504.39 | 53,440 | 51,822 | 51,822 | - n.a. - |
| 1 year ago | 2025-09-13 | 100.0 | 504.14 | 52,399 | 51,822 | 51,822 | - n.a. - |
*
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 | 2026-09-13 20:00 | 503.98 | 504.00 | -0.02 |
| 1 hour prior | 2026-09-13 19:00 | 503.98 | 504.00 | -0.02 |
| 2 hours prior | 2026-09-13 18:00 | 503.99 | 504.00 | -0.01 |
| 6 hours prior | 2026-09-13 14:00 | 503.99 | 504.00 | -0.01 |
| 12 hours prior | 2026-09-13 08:00 | 503.99 | 504.00 | -0.01 |
| 24 hours prior | 2026-09-12 20:00 | 504.00 | 504.00 | 0.00 |
| 48 hours prior | 2026-09-11 20:00 | 504.00 | 504.00 | 0.00 |
*
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
