Lake Sulphur Springs: 87.4% full as of 2022-12-09

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 2022-12-09 87.4 457.69 15,505 15,505 17,747 - n.a. -
1 day prior 2022-12-08 88.2 457.78 15,653 15,653 17,747 - n.a. -
2 days prior 2022-12-07 89.5 457.92 15,883 15,883 17,747 - n.a. -
1 week prior 2022-12-02 97.2 458.68 17,255 17,255 17,747 - n.a. -
1 month prior 2022-11-09 70.6 455.74 12,532 12,532 17,747 - n.a. -
3 months prior 2022-09-09 70.5 455.72 12,505 12,505 17,747 - n.a. -
6 months prior 2022-06-09 75.0 456.29 13,315 13,315 17,747 - n.a. -
1 year prior 2021-12-09 56.5 453.77 10,023 10,023 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 2022-12-10 02:30 457.62 458.95 -1.33
1 hour prior 2022-12-10 01:30 457.62 458.95 -1.33
2 hours prior 2022-12-10 00:30 457.62 458.95 -1.33
6 hours prior 2022-12-09 20:30 457.65 458.95 -1.30
12 hours prior 2022-12-09 14:30 457.67 458.95 -1.28
24 hours prior 2022-12-09 02:30 457.74 458.95 -1.21
48 hours prior 2022-12-08 02:30 457.83 458.95 -1.12
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1973-01-01
Gauge USGS:07343460
Vertical datum NGVD29
Service spillway crest elevation 441.00 ft above NGVD29
Service spillway crest elevation 457.00 ft above NGVD29
Top of flood gate elevation 441.00 ft above NGVD29
Emergency spillway crest elevation 462.00 ft above NGVD29
Top of dam elevation 474.00 ft above NGVD29
Conservation pool elevation 458.95 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