Lake Sulphur Springs: 90.0% full as of 2026-09-05
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 | 2026-09-05 | 90.0 | 457.97 | 15,966 | 15,966 | 17,747 | - n.a. - |
| 1 day prior | 2026-09-04 | 90.1 | 457.98 | 15,982 | 15,982 | 17,747 | - n.a. - |
| 2 days prior | 2026-09-03 | 90.2 | 457.99 | 15,999 | 15,999 | 17,747 | - n.a. - |
| 1 week prior | 2026-08-29 | 91.5 | 458.12 | 16,234 | 16,234 | 17,747 | - n.a. - |
| 1 month prior | 2026-08-05 | 97.4 | 458.70 | 17,291 | 17,291 | 17,747 | - n.a. - |
| 3 months prior | 2026-06-05 | 99.8 | 458.93 | 17,710 | 17,710 | 17,747 | - n.a. - |
| 6 months prior | 2026-03-05 | 80.0 | 456.88 | 14,192 | 14,192 | 17,747 | - n.a. - |
| 1 year prior | 2025-09-05 | 85.1 | 457.45 | 15,110 | 15,110 | 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 | 2026-09-05 23:30 | 457.96 | 458.95 | -0.99 |
| 1 hour prior | 2026-09-05 22:30 | 457.96 | 458.95 | -0.99 |
| 2 hours prior | 2026-09-05 21:30 | 457.96 | 458.95 | -0.99 |
| 6 hours prior | 2026-09-05 17:30 | 457.94 | 458.95 | -1.01 |
| 12 hours prior | 2026-09-05 11:30 | 457.97 | 458.95 | -0.98 |
| 24 hours prior | 2026-09-04 23:30 | 457.97 | 458.95 | -0.98 |
| 48 hours prior | 2026-09-03 23:30 | 457.99 | 458.95 | -0.96 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1973-01-01 |
| Vertical datum | NGVD29 |
| Service spillway crest elevation | 441.00 ft above NGVD29 |
| Service spillway crest elevation | 457.00 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)
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|
| Data Source | USGS:07343460 |
| USGS Monitoring Location | USGS:07343460 |
Lake Location
