Navarro Mills Lake: 86.5% full as of 2026-08-21
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 | 2026-08-21 | 86.5 | 423.03 | 43,118 | 43,117 | 49,827 | 4,437 |
| Yesterday | 2026-08-20 | 86.6 | 423.04 | 43,162 | 43,161 | 49,827 | 4,438 |
| 2 days ago | 2026-08-19 | 87.0 | 423.08 | 43,340 | 43,339 | 49,827 | 4,445 |
| 1 week ago | 2026-08-14 | 88.4 | 423.24 | 44,053 | 44,052 | 49,827 | 4,471 |
| 1 month ago | 2026-07-21 | 95.4 | 424.01 | 47,546 | 47,545 | 49,827 | 4,606 |
| 3 months ago | 2026-05-21 | 100.0 | 424.53 | 49,969 | 49,827 | 49,827 | - n.a. - |
| 6 months ago | 2026-02-21 | 98.0 | 424.29 | 48,843 | 48,842 | 49,827 | 4,662 |
| 1 year ago | 2025-08-21 | 99.9 | 424.49 | 49,780 | 49,779 | 49,827 | 4,731 |
*
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 | 2026-08-21 17:00 | 423.00 | 424.50 | -1.50 |
| 1 hour prior | 2026-08-21 16:00 | 423.00 | 424.50 | -1.50 |
| 2 hours prior | 2026-08-21 15:00 | 423.00 | 424.50 | -1.50 |
| 6 hours prior | 2026-08-21 11:00 | 423.01 | 424.50 | -1.49 |
| 12 hours prior | 2026-08-21 05:00 | 423.02 | 424.50 | -1.48 |
| 24 hours prior | 2026-08-20 17:00 | 423.03 | 424.50 | -1.47 |
| 48 hours prior | 2026-08-19 17:00 | 423.07 | 424.50 | -1.43 |
*
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
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|
| Data Source | USGS:08063050 |
| USGS Monitoring Location | USGS:08063050 |
Lake Location
