Greenbelt Lake: 4.6% full as of 2026-09-27
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 | 2026-09-27 | 4.6 | 2,607.20 | 3,200 | 2,768 | 59,968 | 276 |
| Yesterday | 2026-09-26 | 4.6 | 2,607.19 | 3,197 | 2,765 | 59,968 | 276 |
| 2 days ago | 2026-09-25 | 4.6 | 2,607.15 | 3,184 | 2,752 | 59,968 | 275 |
| 1 week ago | 2026-09-20 | 4.6 | 2,607.25 | 3,218 | 2,786 | 59,968 | 277 |
| 1 month ago | 2026-08-27 | 5.1 | 2,608.01 | 3,475 | 3,043 | 59,968 | 291 |
| 3 months ago | 2026-06-27 | 6.1 | 2,610.08 | 4,110 | 3,678 | 59,968 | 325 |
| 6 months ago | 2026-03-27 | 7.3 | 2,612.01 | 4,816 | 4,384 | 59,968 | 358 |
| 1 year ago | 2025-09-27 | 8.7 | 2,614.23 | 5,644 | 5,212 | 59,968 | 397 |
*
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 | 2026-09-27 03:30 | 2,607.20 | 2,664.00 | -56.80 |
| 1 hour prior | 2026-09-27 02:30 | 2,607.21 | 2,664.00 | -56.79 |
| 2 hours prior | 2026-09-27 01:30 | 2,607.20 | 2,664.00 | -56.80 |
| 6 hours prior | 2026-09-26 21:30 | 2,607.20 | 2,664.00 | -56.80 |
| 12 hours prior | 2026-09-26 15:30 | 2,607.21 | 2,664.00 | -56.79 |
| 24 hours prior | 2026-09-26 03:30 | 2,607.14 | 2,664.00 | -56.86 |
| 48 hours prior | 2026-09-25 03:30 | 2,607.16 | 2,664.00 | -56.84 |
*
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
