Lake Nacogdoches: 86.3% full as of 2026-09-20
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 | 2026-09-20 | 86.3 | 276.37 | 34,090 | 34,088 | 39,522 | 1,957 |
| 1 day prior | 2026-09-19 | 86.4 | 276.40 | 34,149 | 34,147 | 39,522 | 1,960 |
| 2 days prior | 2026-09-18 | 86.5 | 276.43 | 34,208 | 34,206 | 39,522 | 1,962 |
| 1 week prior | 2026-09-13 | 87.3 | 276.58 | 34,503 | 34,501 | 39,522 | 1,973 |
| 1 month prior | 2026-08-20 | 89.7 | 277.06 | 35,459 | 35,457 | 39,522 | 2,010 |
| 3 months prior | 2026-06-20 | 97.8 | 278.60 | 38,657 | 38,655 | 39,522 | 2,146 |
| 6 months prior | 2026-03-20 | 97.9 | 278.61 | 38,678 | 38,676 | 39,522 | 2,147 |
| 1 year prior | 2025-09-20 | 92.6 | 277.62 | 36,598 | 36,596 | 39,522 | 2,058 |
*
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 | 2026-09-20 23:45 | 276.35 | 279.00 | -2.65 |
| 1 hour prior | 2026-09-20 22:45 | 276.36 | 279.00 | -2.64 |
| 2 hours prior | 2026-09-20 21:45 | 276.35 | 279.00 | -2.65 |
| 6 hours prior | 2026-09-20 17:45 | 276.36 | 279.00 | -2.64 |
| 12 hours prior | 2026-09-20 11:45 | 276.37 | 279.00 | -2.63 |
| 24 hours prior | 2026-09-19 23:45 | 276.38 | 279.00 | -2.62 |
| 48 hours prior | 2026-09-18 23:45 | 276.41 | 279.00 | -2.59 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1977-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 235.90 ft above NGVD29 |
| Service spillway crest elevation | 279.00 ft above NGVD29 |
| Emergency spillway crest elevation | 286.10 ft above NGVD29 |
| Maximum design elevation | 298.50 ft above NGVD29 |
| Top of dam elevation | 303.00 ft above NGVD29 |
| Conservation pool elevation | 279.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:08036700 |
| USGS Monitoring Location | USGS:08036700 |
Lake Location
