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: 7.6% full as of 2022-01-19

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 2022-01-19 7.6 3,010.57 3,537 3,537 46,450 185
Yesterday 2022-01-18 7.6 3,010.57 3,537 3,537 46,450 185
2 days ago 2022-01-17 7.6 3,010.58 3,539 3,539 46,450 185
1 week ago 2022-01-12 7.6 3,010.62 3,545 3,545 46,450 185
1 month ago 2021-12-19 7.7 3,010.82 3,581 3,581 46,450 186
3 months ago 2021-10-19 8.0 3,011.64 3,724 3,724 46,450 191
6 months ago 2021-07-19 8.7 3,013.36 4,025 4,025 46,450 202
1 year ago 2021-01-19 8.9 3,013.99 4,142 4,142 46,450 206
*

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 2022-01-19 16:30 3,010.56 3,100.00 -89.44 below flood pool
1 hour prior 2022-01-19 15:30 3,010.58 3,100.00 -89.42 below flood pool
2 hours prior 2022-01-19 14:30 3,010.59 3,100.00 -89.41 below flood pool
6 hours prior 2022-01-19 10:30 3,010.59 3,100.00 -89.41 below flood pool
12 hours prior 2022-01-19 04:30 3,010.56 3,100.00 -89.44 below flood pool
24 hours prior 2022-01-18 16:30 3,010.58 3,100.00 -89.42 below flood pool
48 hours prior 2022-01-17 16:30 3,010.58 3,100.00 -89.42 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