Greenbelt Lake: 4.7% full as of 2026-09-18
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Most recent | 2026-09-18 | 4.7 | 2,607.31 | 3,240 | 2,808 | 59,968 | 278 |
| 1 day prior | 2026-09-17 | 4.7 | 2,607.34 | 3,251 | 2,819 | 59,968 | 278 |
| 2 days prior | 2026-09-16 | 4.7 | 2,607.37 | 3,263 | 2,831 | 59,968 | 279 |
| 1 week prior | 2026-09-11 | 4.8 | 2,607.52 | 3,319 | 2,887 | 59,968 | 281 |
| 1 month prior | 2026-08-18 | 5.2 | 2,608.23 | 3,545 | 3,113 | 59,968 | 294 |
| 3 months prior | 2026-06-18 | 6.2 | 2,610.30 | 4,178 | 3,746 | 59,968 | 329 |
| 6 months prior | 2026-03-18 | 7.4 | 2,612.16 | 4,864 | 4,432 | 59,968 | 361 |
| 1 year prior | 2025-09-18 | 8.9 | 2,614.46 | 5,742 | 5,310 | 59,968 | 400 |
*
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 03:30 | 2,607.29 | 2,664.00 | -56.71 |
| 1 hour prior | 2026-09-19 02:30 | 2,607.29 | 2,664.00 | -56.71 |
| 2 hours prior | 2026-09-19 01:30 | 2,607.29 | 2,664.00 | -56.71 |
| 6 hours prior | 2026-09-18 21:30 | 2,607.29 | 2,664.00 | -56.71 |
| 12 hours prior | 2026-09-18 15:30 | 2,607.30 | 2,664.00 | -56.70 |
| 24 hours prior | 2026-09-18 03:30 | 2,607.31 | 2,664.00 | -56.69 |
| 48 hours prior | 2026-09-17 03:30 | 2,607.35 | 2,664.00 | -56.65 |
*
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)
|
|
| Data Source | USGS:07299840 |
| USGS Monitoring Location | USGS:07299840 |
Lake Location
