Mackenzie Reservoir: 10.9% full as of 2026-10-04
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 | 2026-10-04 | 10.9 | 3,018.59 | 5,057 | 5,057 | 46,450 | 236 |
| Yesterday | 2026-10-03 | 10.9 | 3,018.62 | 5,061 | 5,061 | 46,450 | 236 |
| 2 days ago | 2026-10-02 | 10.9 | 3,018.62 | 5,061 | 5,061 | 46,450 | 236 |
| 1 week ago | 2026-09-27 | 10.9 | 3,018.66 | 5,067 | 5,067 | 46,450 | 236 |
| 1 month ago | 2026-09-04 | 11.0 | 3,018.91 | 5,118 | 5,118 | 46,450 | 238 |
| 3 months ago | 2026-07-04 | 11.8 | 3,020.53 | 5,504 | 5,504 | 46,450 | 248 |
| 6 months ago | 2026-04-04 | 12.3 | 3,021.37 | 5,691 | 5,691 | 46,450 | 254 |
| 1 year ago | 2025-10-04 | 13.1 | 3,023.09 | 6,103 | 6,103 | 46,450 | 266 |
*
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 | 2026-10-04 21:30 | 3,018.57 | 3,100.00 | -81.43 |
| 1 hour prior | 2026-10-04 20:30 | 3,018.57 | 3,100.00 | -81.43 |
| 2 hours prior | 2026-10-04 19:30 | 3,018.58 | 3,100.00 | -81.42 |
| 6 hours prior | 2026-10-04 15:30 | 3,018.59 | 3,100.00 | -81.41 |
| 12 hours prior | 2026-10-04 09:30 | 3,018.59 | 3,100.00 | -81.41 |
| 24 hours prior | 2026-10-03 21:30 | 3,018.60 | 3,100.00 | -81.40 |
| 48 hours prior | 2026-10-02 21:30 | 3,018.62 | 3,100.00 | -81.38 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1974-01-01 |
| Vertical datum | NGVD29 |
| Service spillway crest elevation | 3,100.00 ft above NGVD29 |
| Emergency spillway crest elevation | 3,110.00 ft above NGVD29 |
| Top of dam elevation | 3,126.00 ft above NGVD29 |
| Conservation pool elevation | 3,100.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1974-10-01 (source: TWDB)
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|
| Data Source | USGS:07298100 |
| USGS Monitoring Location | USGS:07298100 |
Lake Location
