Grapevine Lake: 97.7% full as of 2026-08-11
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 | 2026-08-11 | 97.7 | 534.42 | 159,280 | 159,280 | 163,064 | 6,452 |
| Yesterday | 2026-08-10 | 97.8 | 534.45 | 159,473 | 159,473 | 163,064 | 6,459 |
| 2 days ago | 2026-08-09 | 98.0 | 534.49 | 159,732 | 159,732 | 163,064 | 6,469 |
| 1 week ago | 2026-08-04 | 98.9 | 534.72 | 161,226 | 161,226 | 163,064 | 6,526 |
| 1 month ago | 2026-07-11 | 100.0 | 535.05 | 163,394 | 163,064 | 163,064 | - n.a. - |
| 3 months ago | 2026-05-11 | 100.0 | 535.35 | 165,387 | 163,064 | 163,064 | - n.a. - |
| 6 months ago | 2026-02-11 | 98.8 | 534.69 | 161,030 | 161,030 | 163,064 | 6,518 |
| 1 year ago | 2025-08-11 | 98.5 | 534.62 | 160,575 | 160,575 | 163,064 | 6,500 |
*
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 | 2026-08-11 05:45 | 534.40 | 535.00 | -0.60 |
| 1 hour prior | 2026-08-11 04:45 | 534.41 | 535.00 | -0.59 |
| 2 hours prior | 2026-08-11 03:45 | 534.40 | 535.00 | -0.60 |
| 6 hours prior | 2026-08-10 23:45 | 534.42 | 535.00 | -0.58 |
| 12 hours prior | 2026-08-10 17:45 | 534.40 | 535.00 | -0.60 |
| 24 hours prior | 2026-08-10 05:45 | 534.45 | 535.00 | -0.55 |
| 48 hours prior | 2026-08-09 05:45 | 534.49 | 535.00 | -0.51 |
*
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
