Lake Sulphur Springs: 88.5% full as of 2026-09-13
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 | 2026-09-13 | 88.5 | 457.81 | 15,702 | 15,702 | 17,747 | - n.a. - |
| Yesterday | 2026-09-12 | 88.7 | 457.83 | 15,735 | 15,735 | 17,747 | - n.a. - |
| 2 days ago | 2026-09-11 | 88.8 | 457.84 | 15,752 | 15,752 | 17,747 | - n.a. - |
| 1 week ago | 2026-09-06 | 89.8 | 457.95 | 15,933 | 15,933 | 17,747 | - n.a. - |
| 1 month ago | 2026-08-13 | 95.4 | 458.50 | 16,926 | 16,926 | 17,747 | - n.a. - |
| 3 months ago | 2026-06-13 | 100.0 | 459.04 | 17,918 | 17,747 | 17,747 | - n.a. - |
| 6 months ago | 2026-03-13 | 80.9 | 456.99 | 14,355 | 14,355 | 17,747 | - n.a. - |
| 1 year ago | 2025-09-13 | 84.3 | 457.36 | 14,962 | 14,962 | 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 | 2026-09-13 22:30 | 457.80 | 458.95 | -1.15 |
| 1 hour prior | 2026-09-13 21:30 | 457.80 | 458.95 | -1.15 |
| 2 hours prior | 2026-09-13 20:30 | 457.80 | 458.95 | -1.15 |
| 6 hours prior | 2026-09-13 16:30 | 457.81 | 458.95 | -1.14 |
| 12 hours prior | 2026-09-13 10:30 | 457.80 | 458.95 | -1.15 |
| 24 hours prior | 2026-09-12 22:30 | 457.82 | 458.95 | -1.13 |
| 48 hours prior | 2026-09-11 22:30 | 457.84 | 458.95 | -1.11 |
*
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
