Greenbelt Lake: 4.4% full as of 2026-10-18
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 | 2026-10-18 | 4.4 | 2,606.77 | 3,085 | 2,653 | 59,968 | 269 |
| Yesterday | 2026-10-17 | 4.4 | 2,606.79 | 3,090 | 2,658 | 59,968 | 269 |
| 2 days ago | 2026-10-16 | 4.4 | 2,606.83 | 3,100 | 2,668 | 59,968 | 270 |
| 1 week ago | 2026-10-11 | 4.4 | 2,606.81 | 3,095 | 2,663 | 59,968 | 269 |
| 1 month ago | 2026-09-18 | 4.7 | 2,607.31 | 3,240 | 2,808 | 59,968 | 278 |
| 3 months ago | 2026-07-18 | 5.9 | 2,609.57 | 3,957 | 3,525 | 59,968 | 316 |
| 6 months ago | 2026-04-18 | 7.0 | 2,611.52 | 4,632 | 4,200 | 59,968 | 349 |
| 1 year ago | 2025-10-18 | 8.3 | 2,613.71 | 5,435 | 5,003 | 59,968 | 387 |
*
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 | 2026-10-18 16:30 | 2,606.76 | 2,664.00 | -57.24 |
| 1 hour prior | 2026-10-18 15:30 | 2,606.76 | 2,664.00 | -57.24 |
| 2 hours prior | 2026-10-18 14:30 | 2,606.76 | 2,664.00 | -57.24 |
| 6 hours prior | 2026-10-18 10:30 | 2,606.77 | 2,664.00 | -57.23 |
| 12 hours prior | 2026-10-18 04:30 | 2,606.77 | 2,664.00 | -57.23 |
| 24 hours prior | 2026-10-17 16:30 | 2,606.78 | 2,664.00 | -57.22 |
| 48 hours prior | 2026-10-16 16:30 | 2,606.82 | 2,664.00 | -57.18 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1968-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 2,590.00 ft above NGVD29 |
| Service spillway crest elevation | 2,664.00 ft above NGVD29 |
| Emergency spillway crest elevation | 2,674.00 ft above NGVD29 |
| Top of dam elevation | 2,686.00 ft above NGVD29 |
| Conservation pool elevation | 2,664.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1974-10-01 (source: TWDB)
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| Data Source | USGS:07299840 |
| USGS Monitoring Location | USGS:07299840 |
Lake Location
