Granger Lake: 98.9% full as of 2026-09-19
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 | 2026-09-19 | 98.9 | 503.86 | 51,250 | 51,250 | 51,822 | 4,077 |
| Yesterday | 2026-09-18 | 99.1 | 503.88 | 51,331 | 51,331 | 51,822 | 4,082 |
| 2 days ago | 2026-09-17 | 99.2 | 503.90 | 51,412 | 51,412 | 51,822 | 4,086 |
| 1 week ago | 2026-09-12 | 100.0 | 504.01 | 51,864 | 51,822 | 51,822 | - n.a. - |
| 1 month ago | 2026-08-19 | 100.0 | 504.62 | 54,410 | 51,822 | 51,822 | - n.a. - |
| 3 months ago | 2026-06-19 | 100.0 | 509.66 | 78,570 | 51,822 | 51,822 | - n.a. - |
| 6 months ago | 2026-03-19 | 100.0 | 504.28 | 52,980 | 51,822 | 51,822 | - n.a. - |
| 1 year ago | 2025-09-19 | 100.0 | 504.04 | 51,987 | 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 | 2026-09-19 03:00 | 503.86 | 504.00 | -0.14 |
| 1 hour prior | 2026-09-19 02:00 | 503.86 | 504.00 | -0.14 |
| 2 hours prior | 2026-09-19 01:00 | 503.86 | 504.00 | -0.14 |
| 6 hours prior | 2026-09-18 21:00 | 503.87 | 504.00 | -0.13 |
| 12 hours prior | 2026-09-18 15:00 | 503.87 | 504.00 | -0.13 |
| 24 hours prior | 2026-09-18 03:00 | 503.89 | 504.00 | -0.11 |
| 48 hours prior | 2026-09-17 03:00 | 503.91 | 504.00 | -0.09 |
*
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
