Granger Lake is 100.0% full as of 2016-06-24

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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Most recent 2016-06-24 100.0 509.20 75,608 50,779 50,779 - n.a. -
1 day prior 2016-06-23 100.0 509.59 77,752 50,779 50,779 - n.a. -
2 days prior 2016-06-22 100.0 509.97 79,879 50,779 50,779 - n.a. -
1 week prior 2016-06-17 100.0 511.81 90,702 50,779 50,779 - n.a. -
1 month prior 2016-05-24 100.0 510.86 85,005 50,779 50,779 - n.a. -
3 months prior 2016-03-24 100.0 506.93 63,911 50,779 50,779 - n.a. -
6 months prior 2015-12-24 100.0 506.05 59,734 50,779 50,779 - n.a. -
1 year prior 2015-06-24 100.0 509.25 75,881 50,779 50,779 - 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 2016-06-25 01:00 508.98 504.0 5.0 into flood pool
1 hour prior 2016-06-25 00:00 509.00 504.0 5.0 into flood pool
2 hours prior 2016-06-24 23:00 509.01 504.0 5.0 into flood pool
6 hours prior 2016-06-24 19:00 509.07 504.0 5.1 into flood pool
12 hours prior 2016-06-24 13:00 509.16 504.0 5.2 into flood pool
24 hours prior 2016-06-24 01:00 509.39 504.0 5.4 into flood pool
48 hours prior 2016-06-23 01:00 509.76 504.0 5.8 into 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
Conservation pool elevation 504.0 ft above NGVD29
Emergency spillway crest elevation 528 ft above NGVD29
Flood pool elevation 528 ft above NGVD29
Maximum design elevation 550.3 ft above NGVD29
Top of dam elevation 555 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