Canyon Lake: 91.6% full as of 2020-10-21

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)
Most recent 2020-10-21 91.6 905.03 347,064 346,993 378,781 7,774
1 day prior 2020-10-20 91.7 905.06 347,297 347,226 378,781 7,778
2 days prior 2020-10-19 91.7 905.08 347,453 347,382 378,781 7,780
1 week prior 2020-10-14 92.0 905.23 348,621 348,550 378,781 7,798
1 month prior 2020-09-21 93.2 905.81 353,164 353,093 378,781 7,867
3 months prior 2020-07-21 96.0 907.14 363,731 363,660 378,781 8,023
6 months prior 2020-04-21 94.3 906.31 357,112 357,041 378,781 7,926
1 year prior 2019-10-21 94.7 906.51 358,700 358,629 378,781 7,950
*

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 2020-10-21 23:15 905.02 909.00 -3.98 below flood pool
1 hour prior 2020-10-21 22:15 905.02 909.00 -3.98 below flood pool
2 hours prior 2020-10-21 21:15 905.02 909.00 -3.98 below flood pool
6 hours prior 2020-10-21 17:15 905.03 909.00 -3.97 below flood pool
12 hours prior 2020-10-21 11:15 905.03 909.00 -3.97 below flood pool
24 hours prior 2020-10-20 23:15 905.05 909.00 -3.95 below flood pool
48 hours prior 2020-10-19 23:15 905.07 909.00 -3.93 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 775.00 ft above NGVD29
Service spillway crest elevation 943.00 ft above NGVD29
Emergency spillway crest elevation 943.00 ft above NGVD29
Flood pool elevation 943.00 ft above NGVD29
Maximum design elevation 969.10 ft above NGVD29
Top of dam elevation 974.00 ft above NGVD29
Conservation pool elevation 909.00 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