Grapevine Lake: 91.7% full as of 2026-10-20
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 | 2026-10-20 | 91.7 | 532.87 | 149,524 | 149,524 | 163,064 | 6,152 |
| Yesterday | 2026-10-19 | 91.7 | 532.88 | 149,585 | 149,585 | 163,064 | 6,154 |
| 2 days ago | 2026-10-18 | 91.9 | 532.93 | 149,893 | 149,893 | 163,064 | 6,162 |
| 1 week ago | 2026-10-13 | 92.3 | 533.03 | 150,510 | 150,510 | 163,064 | 6,179 |
| 1 month ago | 2026-09-20 | 91.0 | 532.68 | 148,358 | 148,358 | 163,064 | 6,121 |
| 3 months ago | 2026-07-20 | 100.0 | 535.33 | 165,254 | 163,064 | 163,064 | - n.a. - |
| 6 months ago | 2026-04-20 | 100.0 | 536.23 | 171,363 | 163,064 | 163,064 | - n.a. - |
| 1 year ago | 2025-10-20 | 93.7 | 533.39 | 152,746 | 152,746 | 163,064 | 6,243 |
*
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 | 2026-10-20 13:45 | 532.85 | 535.00 | -2.15 |
| 1 hour prior | 2026-10-20 12:45 | 532.83 | 535.00 | -2.17 |
| 2 hours prior | 2026-10-20 11:45 | 532.76 | 535.00 | -2.24 |
| 6 hours prior | 2026-10-20 07:45 | 532.88 | 535.00 | -2.12 |
| 12 hours prior | 2026-10-20 01:45 | 532.88 | 535.00 | -2.12 |
| 24 hours prior | 2026-10-19 13:45 | 532.80 | 535.00 | -2.20 |
| 48 hours prior | 2026-10-18 13:45 | 532.93 | 535.00 | -2.07 |
*
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
