Granger Lake: 100.0% full as of 2024-03-28

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 2024-03-28 100.0 504.81 55,219 51,822 51,822 - n.a. -
Yesterday 2024-03-27 100.0 504.83 55,305 51,822 51,822 - n.a. -
2 days ago 2024-03-26 100.0 504.85 55,391 51,822 51,822 - n.a. -
1 week ago 2024-03-21 100.0 504.87 55,477 51,822 51,822 - n.a. -
1 month ago 2024-02-28 100.0 504.36 53,315 51,822 51,822 - n.a. -
3 months ago 2023-12-28 91.5 502.89 47,398 47,398 51,822 3,873
6 months ago 2023-09-28 76.2 500.74 39,473 39,473 51,822 3,497
1 year ago 2023-03-28 100.0 504.12 52,316 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 2024-03-28 16:00 504.81 504.00 0.81 into flood pool
1 hour prior 2024-03-28 15:00 504.81 504.00 0.81 into flood pool
2 hours prior 2024-03-28 14:00 504.81 504.00 0.81 into flood pool
6 hours prior 2024-03-28 10:00 504.81 504.00 0.81 into flood pool
12 hours prior 2024-03-28 04:00 504.82 504.00 0.82 into flood pool
24 hours prior 2024-03-27 16:00 504.82 504.00 0.82 into flood pool
48 hours prior 2024-03-26 16:00 504.84 504.00 0.84 into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1979-01-01
Vertical datum NGVD29
Dead pool elevation 457.00 ft above NGVD29
Emergency spillway crest elevation 528.00 ft above NGVD29
Flood pool elevation 528.00 ft above NGVD29
Maximum design elevation 550.30 ft above NGVD29
Top of dam elevation 555.00 ft above NGVD29
Conservation pool elevation 504.00 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
Data Source USGS:08105600

Lake Location