Recent changes

2013-02-12: The rating curve for this reservoir has been updated and replaced with data from the Texas Water Development Board's Report 126.

Mackenzie Reservoir: 8.8% full as of 2021-03-07

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

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 2021-03-07 8.8 3,013.70 4,082 4,082 46,450 204
Yesterday 2021-03-06 8.8 3,013.70 4,082 4,082 46,450 204
2 days ago 2021-03-05 8.8 3,013.72 4,086 4,086 46,450 204
1 week ago 2021-02-28 8.8 3,013.77 4,096 4,096 46,450 205
1 month ago 2021-02-07 8.9 3,013.93 4,129 4,129 46,450 205
3 months ago 2020-12-07 9.1 3,014.33 4,211 4,211 46,450 208
6 months ago 2020-09-07 9.6 3,015.69 4,472 4,472 46,450 217
1 year ago 2020-03-07 11.3 3,019.45 5,263 5,263 46,450 241
*

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 2021-03-07 16:30 3,013.69 3,100.00 -86.31 below flood pool
1 hour prior 2021-03-07 15:30 3,013.70 3,100.00 -86.30 below flood pool
2 hours prior 2021-03-07 14:30 3,013.71 3,100.00 -86.29 below flood pool
6 hours prior 2021-03-07 10:30 3,013.71 3,100.00 -86.29 below flood pool
12 hours prior 2021-03-07 04:30 3,013.70 3,100.00 -86.30 below flood pool
24 hours prior 2021-03-06 16:30 3,013.71 3,100.00 -86.29 below flood pool
48 hours prior 2021-03-05 16:30 3,013.70 3,100.00 -86.30 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1974-01-01
Vertical datum NGVD29
Gauge USGS:07298100
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)

Lake Location