Lake Sulphur Springs: 85.6% full as of 2026-09-24
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 | 2026-09-24 | 85.6 | 457.50 | 15,192 | 15,192 | 17,747 | - n.a. - |
| Yesterday | 2026-09-23 | 85.8 | 457.52 | 15,225 | 15,225 | 17,747 | - n.a. - |
| 2 days ago | 2026-09-22 | 86.1 | 457.55 | 15,275 | 15,275 | 17,747 | - n.a. - |
| 1 week ago | 2026-09-17 | 86.9 | 457.64 | 15,423 | 15,423 | 17,747 | - n.a. - |
| 1 month ago | 2026-08-24 | 92.7 | 458.24 | 16,453 | 16,453 | 17,747 | - n.a. - |
| 3 months ago | 2026-06-24 | 100.0 | 458.99 | 17,820 | 17,747 | 17,747 | - n.a. - |
| 6 months ago | 2026-03-24 | 80.3 | 456.92 | 14,251 | 14,251 | 17,747 | - n.a. - |
| 1 year ago | 2025-09-24 | 83.2 | 457.24 | 14,765 | 14,765 | 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 | 2026-09-24 06:30 | 457.50 | 458.95 | -1.45 |
| 1 hour prior | 2026-09-24 05:30 | 457.50 | 458.95 | -1.45 |
| 2 hours prior | 2026-09-24 04:30 | 457.50 | 458.95 | -1.45 |
| 6 hours prior | 2026-09-24 00:30 | 457.51 | 458.95 | -1.44 |
| 12 hours prior | 2026-09-23 18:30 | 457.52 | 458.95 | -1.43 |
| 24 hours prior | 2026-09-23 06:30 | 457.53 | 458.95 | -1.42 |
| 48 hours prior | 2026-09-22 06:30 | 457.56 | 458.95 | -1.39 |
*
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)
|
|
| Data Source | USGS:07343460 |
| USGS Monitoring Location | USGS:07343460 |
Lake Location
