Lake Sulphur Springs: 95.8% full as of 2026-08-12
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 | 2026-08-12 | 95.8 | 458.54 | 16,999 | 16,999 | 17,747 | - n.a. - |
| Yesterday | 2026-08-11 | 96.0 | 458.56 | 17,036 | 17,036 | 17,747 | - n.a. - |
| 2 days ago | 2026-08-10 | 96.2 | 458.58 | 17,072 | 17,072 | 17,747 | - n.a. - |
| 1 week ago | 2026-08-05 | 97.4 | 458.70 | 17,291 | 17,291 | 17,747 | - n.a. - |
| 1 month ago | 2026-07-12 | 97.2 | 458.68 | 17,255 | 17,255 | 17,747 | - n.a. - |
| 3 months ago | 2026-05-12 | 96.2 | 458.58 | 17,072 | 17,072 | 17,747 | - n.a. - |
| 6 months ago | 2026-02-12 | 75.8 | 456.38 | 13,449 | 13,449 | 17,747 | - n.a. - |
| 1 year ago | 2025-08-12 | 87.6 | 457.72 | 15,554 | 15,554 | 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 | 2026-08-12 03:30 | 458.54 | 458.95 | -0.41 |
| 1 hour prior | 2026-08-12 02:30 | 458.54 | 458.95 | -0.41 |
| 2 hours prior | 2026-08-12 01:30 | 458.53 | 458.95 | -0.42 |
| 6 hours prior | 2026-08-11 21:30 | 458.55 | 458.95 | -0.40 |
| 12 hours prior | 2026-08-11 15:30 | 458.55 | 458.95 | -0.40 |
| 24 hours prior | 2026-08-11 03:30 | 458.57 | 458.95 | -0.38 |
| 48 hours prior | 2026-08-10 03:30 | 458.59 | 458.95 | -0.36 |
*
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
