Lake Sulphur Springs: 76.7% full as of 2018-09-21

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 2018-09-21 76.7 456.49 13,612 13,612 17,747 - n.a. -
1 day prior 2018-09-20 76.8 456.50 13,627 13,627 17,747 - n.a. -
2 days prior 2018-09-19 77.0 456.52 13,657 13,657 17,747 - n.a. -
1 week prior 2018-09-14 77.2 456.55 13,701 13,701 17,747 - n.a. -
1 month prior 2018-08-21 79.0 456.76 14,013 14,013 17,747 - n.a. -
3 months prior 2018-06-21 87.4 457.69 15,505 15,505 17,747 - n.a. -
6 months prior 2018-03-21 91.6 458.13 16,252 16,252 17,747 - n.a. -
1 year prior 2017-09-21 97.9 458.75 17,382 17,382 17,747 - 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 2018-09-21 23:30 456.49 458.9 -2.5 below flood pool
1 hour prior 2018-09-21 22:30 456.48 458.9 -2.5 below flood pool
2 hours prior 2018-09-21 21:30 456.48 458.9 -2.5 below flood pool
6 hours prior 2018-09-21 17:30 456.47 458.9 -2.5 below flood pool
12 hours prior 2018-09-21 11:30 456.48 458.9 -2.5 below flood pool
24 hours prior 2018-09-20 23:30 456.49 458.9 -2.5 below flood pool
48 hours prior 2018-09-19 23:30 456.51 458.9 -2.4 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1973-01-01
Vertical datum NGVD29
Gauge USGS:07343460
Service spillway crest elevation 441.0 ft above NGVD29
Service spillway crest elevation 457.0 ft above NGVD29
Top of flood gate elevation 441.0 ft above NGVD29
Emergency spillway crest elevation 462.0 ft above NGVD29
Top of dam elevation 474.0 ft above NGVD29
Conservation pool elevation 458.9 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1973-01-01 (source: usgs)

Lake Location