Recent changes

2015-06-17: The elevation for the top of the conservation pool for Lake Granbury has been set to the reservoir's normal maximum operating elevation of 692.7 feet. The calculation for percent full is now based on this elevation.

Lake Granbury: 99.4% full as of 2019-03-19

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, and (2) 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)
Most recent 2019-03-19 99.4 692.60 133,043 132,134 132,949 8,136
1 day prior 2019-03-18 99.2 692.57 132,799 131,890 132,949 8,125
2 days prior 2019-03-17 99.4 692.60 133,043 132,134 132,949 8,136
1 week prior 2019-03-12 99.2 692.57 132,799 131,890 132,949 8,125
1 month prior 2019-02-19 100.0 692.73 134,104 132,949 132,949 8,183
3 months prior 2018-12-19 99.5 692.62 133,206 132,297 132,949 8,143
6 months prior 2018-09-19 95.5 691.96 127,911 127,002 132,949 7,902
1 year prior 2018-03-19 100.0 692.83 134,924 132,949 132,949 8,220
*

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

Sorry, no recent instantaneous water level available at this time.

Additional Information

Impoundment date 1969-01-01
Vertical datum NGVD29 -1.11
Gauge USGS:08090900
Dead pool elevation 640.0 ft above NGVD29 -1.11
Service spillway crest elevation 658.0 ft above NGVD29 -1.11
Top of flood gate elevation 693.0 ft above NGVD29 -1.11
Emergency spillway crest elevation 693.0 ft above NGVD29 -1.11
Top of dam elevation 706.5 ft above NGVD29 -1.11
Conservation pool elevation 692.7 ft above NGVD29 -1.11
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1969-01-01 (source: usgs)
2003-07-01 (source: twdb) : GIS Data
2015-06-01 (source: twdb) : GIS Data

Lake Location