Mackenzie Reservoir: 10.8% full as of 2026-11-06
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 | 2026-11-06 | 10.8 | 3,018.31 | 5,012 | 5,012 | 46,450 | 234 |
| Yesterday | 2026-11-05 | 10.8 | 3,018.33 | 5,015 | 5,015 | 46,450 | 234 |
| 2 days ago | 2026-11-04 | 10.8 | 3,018.34 | 5,017 | 5,017 | 46,450 | 234 |
| 1 week ago | 2026-10-30 | 10.8 | 3,018.37 | 5,022 | 5,022 | 46,450 | 234 |
| 1 month ago | 2026-10-06 | 10.9 | 3,018.55 | 5,051 | 5,051 | 46,450 | 236 |
| 3 months ago | 2026-08-06 | 11.4 | 3,019.65 | 5,317 | 5,317 | 46,450 | 242 |
| 6 months ago | 2026-05-06 | 11.9 | 3,020.72 | 5,544 | 5,544 | 46,450 | 250 |
| 1 year ago | 2025-11-06 | 12.9 | 3,022.62 | 5,996 | 5,996 | 46,450 | 262 |
*
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 | 2026-11-06 08:30 | 3,018.30 | 3,100.00 | -81.70 |
| 1 hour prior | 2026-11-06 07:30 | 3,018.30 | 3,100.00 | -81.70 |
| 2 hours prior | 2026-11-06 06:30 | 3,018.30 | 3,100.00 | -81.70 |
| 6 hours prior | 2026-11-06 02:30 | 3,018.30 | 3,100.00 | -81.70 |
| 12 hours prior | 2026-11-05 20:30 | 3,018.31 | 3,100.00 | -81.69 |
| 24 hours prior | 2026-11-05 08:30 | 3,018.34 | 3,100.00 | -81.66 |
| 48 hours prior | 2026-11-04 08:30 | 3,018.34 | 3,100.00 | -81.66 |
*
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
