Greenbelt Lake: 4.2% full as of 2026-11-11
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 | 2026-11-11 | 4.2 | 2,606.31 | 2,965 | 2,533 | 59,968 | 261 |
| Yesterday | 2026-11-10 | 4.2 | 2,606.33 | 2,970 | 2,538 | 59,968 | 262 |
| 2 days ago | 2026-11-09 | 4.2 | 2,606.35 | 2,975 | 2,543 | 59,968 | 262 |
| 1 week ago | 2026-11-04 | 4.3 | 2,606.48 | 3,011 | 2,579 | 59,968 | 264 |
| 1 month ago | 2026-10-11 | 4.4 | 2,606.81 | 3,095 | 2,663 | 59,968 | 269 |
| 3 months ago | 2026-08-11 | 5.4 | 2,608.62 | 3,681 | 3,249 | 59,968 | 299 |
| 6 months ago | 2026-05-11 | 6.7 | - n.a. - | 4,444 | 4,012 | 59,968 | - n.a. - |
| 1 year ago | 2025-11-11 | 8.0 | 2,613.19 | 5,212 | 4,780 | 59,968 | 378 |
*
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 | 2026-11-11 07:30 | 2,606.31 | 2,664.00 | -57.69 |
| 1 hour prior | 2026-11-11 06:30 | 2,606.31 | 2,664.00 | -57.69 |
| 2 hours prior | 2026-11-11 05:30 | 2,606.31 | 2,664.00 | -57.69 |
| 6 hours prior | 2026-11-11 01:30 | 2,606.31 | 2,664.00 | -57.69 |
| 12 hours prior | 2026-11-10 19:30 | 2,606.32 | 2,664.00 | -57.68 |
| 24 hours prior | 2026-11-10 07:30 | 2,606.33 | 2,664.00 | -57.67 |
| 48 hours prior | 2026-11-09 07:30 | 2,606.35 | 2,664.00 | -57.65 |
*
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)
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| Data Source | USGS:07299840 |
| USGS Monitoring Location | USGS:07299840 |
Lake Location
