E. V. Spence Reservoir is 9.7% full as of 2016-08-25

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 2016-08-25 9.7 1,842.68 50,103 50,103 517,272 3,304
1 day prior 2016-08-24 9.7 1,842.72 50,235 50,235 517,272 3,310
2 days prior 2016-08-23 9.7 1,842.75 50,335 50,335 517,272 3,313
1 week prior 2016-08-18 9.6 1,842.56 49,707 49,707 517,272 3,288
1 month prior 2016-07-25 10.1 1,843.35 52,347 52,347 517,272 3,396
3 months prior 2016-05-25 10.0 1,843.12 51,569 51,569 517,272 3,363
6 months prior 2016-02-25 9.4 1,842.30 48,857 48,857 517,272 3,251
1 year prior 2015-08-25 7.5 1,838.99 38,804 38,804 517,272 2,810
*

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 2016-08-26 04:00 1,842.65 1,898.0 -55.3 below flood pool
1 hour prior 2016-08-26 03:00 1,842.65 1,898.0 -55.3 below flood pool
2 hours prior 2016-08-26 02:00 1,842.65 1,898.0 -55.3 below flood pool
6 hours prior 2016-08-25 22:00 1,842.66 1,898.0 -55.3 below flood pool
12 hours prior 2016-08-25 16:00 1,842.68 1,898.0 -55.3 below flood pool
24 hours prior 2016-08-25 04:00 1,842.69 1,898.0 -55.3 below flood pool
48 hours prior 2016-08-24 04:00 1,842.73 1,898.0 -55.3 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
Vertical datum NGVD29
Gauge USGS:08123950
Dead pool elevation 1790.0 ft above NGVD29
Service spillway crest elevation 1878 ft above NGVD29
Conservation pool elevation 1898.0 ft above NGVD29
Top of flood gate elevation 1900 ft above NGVD29
Emergency spillway crest elevation 1908 ft above NGVD29
Top of dam elevation 1928 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1969-01-01 (source: usgs)
1999-07-01 (source: twdb) : GIS Data