Mackenzie Reservoir: 10.8% full as of 2026-10-24
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 | 2026-10-24 | 10.8 | 3,018.30 | 5,010 | 5,010 | 46,450 | 234 |
| 1 day prior | 2026-10-23 | 10.8 | 3,018.31 | 5,012 | 5,012 | 46,450 | 234 |
| 2 days prior | 2026-10-22 | 10.8 | 3,018.32 | 5,013 | 5,013 | 46,450 | 234 |
| 1 week prior | 2026-10-17 | 10.8 | 3,018.37 | 5,022 | 5,022 | 46,450 | 234 |
| 1 month prior | 2026-09-24 | 10.9 | 3,018.50 | 5,043 | 5,043 | 46,450 | 235 |
| 3 months prior | 2026-07-24 | 11.6 | 3,020.07 | 5,407 | 5,407 | 46,450 | 246 |
| 6 months prior | 2026-04-24 | 12.1 | 3,020.99 | 5,602 | 5,602 | 46,450 | 251 |
| 1 year prior | 2025-10-24 | 13.0 | 3,022.80 | 6,036 | 6,036 | 46,450 | 264 |
*
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 | 2026-10-24 23:30 | 3,018.30 | 3,100.00 | -81.70 |
| 1 hour prior | 2026-10-24 22:30 | 3,018.29 | 3,100.00 | -81.71 |
| 2 hours prior | 2026-10-24 21:30 | 3,018.29 | 3,100.00 | -81.71 |
| 6 hours prior | 2026-10-24 17:30 | 3,018.30 | 3,100.00 | -81.70 |
| 12 hours prior | 2026-10-24 11:30 | 3,018.30 | 3,100.00 | -81.70 |
| 24 hours prior | 2026-10-23 23:30 | 3,018.31 | 3,100.00 | -81.69 |
| 48 hours prior | 2026-10-22 23:30 | 3,018.31 | 3,100.00 | -81.69 |
*
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
