Grapevine Lake: 99.6% full as of 2017-07-21

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, while the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

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 2017-07-21 99.6 534.90 164,015 164,014 164,703 6,868
Yesterday 2017-07-20 99.7 534.93 164,222 164,221 164,703 6,876
2 days ago 2017-07-19 99.9 534.97 164,497 164,496 164,703 6,885
1 week ago 2017-07-14 100.0 535.10 165,394 164,703 164,703 6,916
1 month ago 2017-06-21 100.0 535.59 168,808 164,703 164,703 7,018
3 months ago 2017-04-21 100.0 535.40 167,478 164,703 164,703 6,980
6 months ago 2017-01-21 100.0 536.84 177,718 164,703 164,703 7,233
1 year ago 2016-07-21 100.0 538.52 190,104 164,703 164,703 7,512
*

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 2017-07-21 22:45 534.88 535.0 -0.1 below flood pool
1 hour prior 2017-07-21 21:45 534.87 535.0 -0.1 below flood pool
2 hours prior 2017-07-21 20:45 534.86 535.0 -0.1 below flood pool
6 hours prior 2017-07-21 16:45 534.94 535.0 -0.1 below flood pool
12 hours prior 2017-07-21 10:45 534.89 535.0 -0.1 below flood pool
24 hours prior 2017-07-20 22:45 534.92 535.0 -0.1 below flood pool
48 hours prior 2017-07-19 22:45 534.97 535.0 -0.0 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1952-01-01
Vertical datum NGVD29
Gauge USGS:08054500
Dead pool elevation 475.0 ft above NGVD29
Conservation pool elevation 535.0 ft above NGVD29
Emergency spillway crest elevation 560 ft above NGVD29
Flood pool elevation 560 ft above NGVD29
Maximum design elevation 581.9 ft above NGVD29
Top of dam elevation 588 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

Lake Location