Grapevine Lake: 94.1% full as of 2026-08-31

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 2026-08-31 94.1 533.50 153,434 153,434 163,064 6,263
1 day prior 2026-08-30 94.3 533.55 153,747 153,747 163,064 6,272
2 days prior 2026-08-29 94.5 533.61 154,124 154,124 163,064 6,283
1 week prior 2026-08-24 95.2 533.78 155,195 155,195 163,064 6,316
1 month prior 2026-07-31 99.4 534.86 162,143 162,143 163,064 6,564
3 months prior 2026-05-31 100.0 535.66 167,471 163,064 163,064 - n.a. -
6 months prior 2026-02-28 100.0 535.41 165,789 163,064 163,064 - n.a. -
1 year prior 2025-08-31 98.1 534.53 159,991 159,991 163,064 6,478
*

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 2026-08-31 22:45 533.51 535.00 -1.49 below flood pool
1 hour prior 2026-08-31 21:45 533.52 535.00 -1.48 below flood pool
2 hours prior 2026-08-31 20:45 533.52 535.00 -1.48 below flood pool
6 hours prior 2026-08-31 16:45 533.48 535.00 -1.52 below flood pool
12 hours prior 2026-08-31 10:45 533.47 535.00 -1.53 below flood pool
24 hours prior 2026-08-30 22:45 533.53 535.00 -1.47 below flood pool
48 hours prior 2026-08-29 22:45 533.58 535.00 -1.42 below flood pool
*

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