Granger Lake: 92.5% full as of 2018-08-16

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)
Today 2018-08-16 92.5 503.03 47,942 47,942 51,822 3,900
Yesterday 2018-08-15 92.7 503.05 48,020 48,020 51,822 3,904
2 days ago 2018-08-14 92.8 503.07 48,099 48,099 51,822 3,908
1 week ago 2018-08-09 93.0 503.10 48,216 48,216 51,822 3,913
1 month ago 2018-07-16 98.5 503.81 51,046 51,046 51,822 4,064
3 months ago 2018-05-16 100.0 504.56 54,156 51,822 51,822 - n.a. -
6 months ago 2018-02-16 100.0 504.46 53,734 51,822 51,822 - n.a. -
1 year ago 2017-08-16 100.0 504.22 52,731 51,822 51,822 - n.a. -
*

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 2018-08-16 16:00 503.01 504.0 -1.0 below flood pool
1 hour prior 2018-08-16 15:00 503.01 504.0 -1.0 below flood pool
2 hours prior 2018-08-16 14:00 503.01 504.0 -1.0 below flood pool
6 hours prior 2018-08-16 10:00 503.03 504.0 -1.0 below flood pool
12 hours prior 2018-08-16 04:00 503.03 504.0 -1.0 below flood pool
24 hours prior 2018-08-15 16:00 503.04 504.0 -1.0 below flood pool
48 hours prior 2018-08-14 16:00 503.06 504.0 -0.9 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1979-01-01
Vertical datum NGVD29
Gauge USGS:08105600
Dead pool elevation 457.0 ft above NGVD29
Emergency spillway crest elevation 528.0 ft above NGVD29
Flood pool elevation 528.0 ft above NGVD29
Maximum design elevation 550.3 ft above NGVD29
Top of dam elevation 555.0 ft above NGVD29
Conservation pool elevation 504.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1979-01-01 (source: usgs)
2008-08-01 (source: twdb) : GIS Data
2013-03-01 (source: twdb) : GIS Data

Lake Location