Greenbelt Lake: 5.2% full as of 2026-08-17
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 | 2026-08-17 | 5.2 | 2,608.28 | 3,561 | 3,129 | 59,968 | 295 |
| Yesterday | 2026-08-16 | 5.2 | 2,608.31 | 3,570 | 3,138 | 59,968 | 295 |
| 2 days ago | 2026-08-15 | 5.2 | 2,608.34 | 3,580 | 3,148 | 59,968 | 295 |
| 1 week ago | 2026-08-10 | 5.4 | 2,608.66 | 3,696 | 3,264 | 59,968 | 300 |
| 1 month ago | 2026-07-17 | 5.9 | 2,609.60 | 3,967 | 3,535 | 59,968 | 317 |
| 3 months ago | 2026-05-17 | 6.6 | 2,610.82 | 4,374 | 3,942 | 59,968 | 339 |
| 6 months ago | 2026-02-17 | 7.6 | 2,612.59 | 5,011 | 4,579 | 59,968 | 368 |
| 1 year ago | 2025-08-17 | 9.4 | 2,615.24 | 6,058 | 5,626 | 59,968 | 414 |
*
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 | 2026-08-17 21:30 | 2,608.26 | 2,664.00 | -55.74 |
| 1 hour prior | 2026-08-17 20:30 | 2,608.26 | 2,664.00 | -55.74 |
| 2 hours prior | 2026-08-17 19:30 | 2,608.26 | 2,664.00 | -55.74 |
| 6 hours prior | 2026-08-17 15:30 | 2,608.28 | 2,664.00 | -55.72 |
| 12 hours prior | 2026-08-17 09:30 | 2,608.27 | 2,664.00 | -55.73 |
| 24 hours prior | 2026-08-16 21:30 | 2,608.29 | 2,664.00 | -55.71 |
| 48 hours prior | 2026-08-15 21:30 | 2,608.32 | 2,664.00 | -55.68 |
*
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
