Grapevine Lake: 91.6% full as of 2026-09-17
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 | 2026-09-17 | 91.6 | 532.84 | 149,339 | 149,339 | 163,064 | 6,147 |
| Yesterday | 2026-09-16 | 91.6 | 532.84 | 149,339 | 149,339 | 163,064 | 6,147 |
| 2 days ago | 2026-09-15 | 91.7 | 532.88 | 149,585 | 149,585 | 163,064 | 6,154 |
| 1 week ago | 2026-09-10 | 92.7 | 533.13 | 151,129 | 151,129 | 163,064 | 6,197 |
| 1 month ago | 2026-08-17 | 96.8 | 534.20 | 157,866 | 157,866 | 163,064 | 6,403 |
| 3 months ago | 2026-06-17 | 100.0 | 536.22 | 171,294 | 163,064 | 163,064 | - n.a. - |
| 6 months ago | 2026-03-17 | 100.0 | 535.45 | 166,057 | 163,064 | 163,064 | - n.a. - |
| 1 year ago | 2025-09-17 | 97.6 | 534.40 | 159,151 | 159,151 | 163,064 | 6,447 |
*
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 | 2026-09-17 13:45 | 532.84 | 535.00 | -2.16 |
| 1 hour prior | 2026-09-17 12:45 | 532.83 | 535.00 | -2.17 |
| 2 hours prior | 2026-09-17 11:45 | 532.84 | 535.00 | -2.16 |
| 6 hours prior | 2026-09-17 07:45 | 532.88 | 535.00 | -2.12 |
| 12 hours prior | 2026-09-17 01:45 | 532.82 | 535.00 | -2.18 |
| 24 hours prior | 2026-09-16 13:45 | 532.86 | 535.00 | -2.14 |
| 48 hours prior | 2026-09-15 13:45 | 532.90 | 535.00 | -2.10 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1952-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 475.00 ft above NGVD29 |
| Emergency spillway crest elevation | 560.00 ft above NGVD29 |
| Flood pool elevation | 560.00 ft above NGVD29 |
| Maximum design elevation | 581.90 ft above NGVD29 |
| Top of dam elevation | 588.00 ft above NGVD29 |
| Conservation pool elevation | 535.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
2002-05-01 (source: TWDB)
: GIS Data
2011-09-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08054500 |
| USGS Monitoring Location | USGS:08054500 |
Lake Location
