Canyon Lake: 92.2% full as of 2018-05-21

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 2018-05-21 92.2 905.30 349,167 349,096 378,781 7,807
Yesterday 2018-05-20 92.1 905.28 349,011 348,940 378,781 7,804
2 days ago 2018-05-19 92.1 905.28 349,011 348,940 378,781 7,804
1 week ago 2018-05-14 92.3 905.39 349,871 349,800 378,781 7,817
1 month ago 2018-04-21 92.3 905.39 349,871 349,800 378,781 7,817
3 months ago 2018-02-21 91.8 905.14 347,920 347,849 378,781 7,787
6 months ago 2017-11-21 93.2 905.78 352,928 352,857 378,781 7,863
1 year ago 2017-05-21 99.6 908.82 377,371 377,300 378,781 8,216
*

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 2018-05-21 12:15 905.30 909.0 -3.7 below flood pool
1 hour prior 2018-05-21 11:15 905.30 909.0 -3.7 below flood pool
2 hours prior 2018-05-21 10:15 905.30 909.0 -3.7 below flood pool
6 hours prior 2018-05-21 06:15 905.30 909.0 -3.7 below flood pool
12 hours prior 2018-05-21 00:15 905.30 909.0 -3.7 below flood pool
24 hours prior 2018-05-20 12:15 905.27 909.0 -3.7 below flood pool
48 hours prior 2018-05-19 12:15 905.29 909.0 -3.7 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1964-01-01
Vertical datum NGVD29
Gauge USGS:08167700
Dead pool elevation 775.0 ft above NGVD29
Service spillway crest elevation 943.0 ft above NGVD29
Emergency spillway crest elevation 943.0 ft above NGVD29
Flood pool elevation 943.0 ft above NGVD29
Maximum design elevation 969.1 ft above NGVD29
Top of dam elevation 974.0 ft above NGVD29
Conservation pool elevation 909.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2000-11-01 (source: twdb) : GIS Data

Lake Location