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 is 15.2% full as of 2016-07-25

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, while 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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Today 2016-07-25 15.2 3,026.84 7,064 7,064 46,450 291
Yesterday 2016-07-24 15.2 3,026.86 7,069 7,069 46,450 291
2 days ago 2016-07-23 15.2 3,026.89 7,076 7,076 46,450 291
1 week ago 2016-07-18 15.3 3,027.06 7,124 7,124 46,450 293
1 month ago 2016-06-25 15.6 3,027.40 7,227 7,227 46,450 295
3 months ago 2016-04-25 16.0 3,028.09 7,429 7,429 46,450 300
6 months ago 2016-01-25 16.4 3,028.71 7,600 7,600 46,450 303
1 year ago 2015-07-25 16.9 3,029.55 7,848 7,848 46,450 310
*

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 2016-07-25 16:30 3,026.89 3,100.0 -73.1 below flood pool
1 hour prior 2016-07-25 15:30 3,026.88 3,100.0 -73.1 below flood pool
2 hours prior 2016-07-25 14:30 3,026.85 3,100.0 -73.2 below flood pool
6 hours prior 2016-07-25 10:30 3,026.85 3,100.0 -73.2 below flood pool
12 hours prior 2016-07-25 04:30 3,026.84 3,100.0 -73.2 below flood pool
24 hours prior 2016-07-24 16:30 3,026.87 3,100.0 -73.1 below flood pool
48 hours prior 2016-07-23 16:30 3,026.90 3,100.0 -73.1 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 3100 ft above NGVD29
Conservation pool elevation 3100 ft above NGVD29
Emergency spillway crest elevation 3110 ft above NGVD29
Top of dam elevation 3126 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: twdb)