Navarro Mills Lake: 89.4% full as of 2026-08-11
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 | 2026-08-11 | 89.4 | 423.35 | 44,546 | 44,545 | 49,827 | 4,489 |
| Yesterday | 2026-08-10 | 89.7 | 423.38 | 44,680 | 44,679 | 49,827 | 4,494 |
| 2 days ago | 2026-08-09 | 89.9 | 423.41 | 44,815 | 44,814 | 49,827 | 4,499 |
| 1 week ago | 2026-08-04 | 91.3 | 423.56 | 45,492 | 45,491 | 49,827 | 4,524 |
| 1 month ago | 2026-07-11 | 95.9 | 424.06 | 47,777 | 47,776 | 49,827 | 4,615 |
| 3 months ago | 2026-05-11 | 100.0 | 424.60 | 50,298 | 49,827 | 49,827 | - n.a. - |
| 6 months ago | 2026-02-11 | 97.7 | 424.26 | 48,704 | 48,703 | 49,827 | 4,656 |
| 1 year ago | 2025-08-11 | 99.5 | 424.45 | 49,592 | 49,591 | 49,827 | 4,711 |
*
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 | 2026-08-11 17:00 | 423.34 | 424.50 | -1.16 |
| 1 hour prior | 2026-08-11 16:00 | 423.35 | 424.50 | -1.15 |
| 2 hours prior | 2026-08-11 15:00 | 423.34 | 424.50 | -1.16 |
| 6 hours prior | 2026-08-11 11:00 | 423.36 | 424.50 | -1.14 |
| 12 hours prior | 2026-08-11 05:00 | 423.36 | 424.50 | -1.14 |
| 24 hours prior | 2026-08-10 17:00 | 423.37 | 424.50 | -1.13 |
| 48 hours prior | 2026-08-09 17:00 | 423.39 | 424.50 | -1.11 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1963-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 400.00 ft above NGVD29 |
| Service spillway crest elevation | 414.00 ft above NGVD29 |
| Top of flood gate elevation | 443.00 ft above NGVD29 |
| Emergency spillway crest elevation | 443.00 ft above NGVD29 |
| Flood pool elevation | 443.00 ft above NGVD29 |
| Maximum design elevation | 451.90 ft above NGVD29 |
| Top of dam elevation | 457.00 ft above NGVD29 |
| Conservation pool elevation | 424.50 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
2008-04-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08063050 |
| USGS Monitoring Location | USGS:08063050 |
Lake Location
