Lake Arrowhead: 100.0% full as of 2018-12-18

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 2018-12-18 100.0 926.41 236,350 230,359 230,359 - n.a. -
Yesterday 2018-12-17 100.0 926.37 235,762 230,359 230,359 - n.a. -
2 days ago 2018-12-16 100.0 926.30 234,734 230,359 230,359 - n.a. -
1 week ago 2018-12-11 99.4 925.91 229,056 229,056 230,359 14,460
1 month ago 2018-11-18 99.6 925.93 229,346 229,346 230,359 14,470
3 months ago 2018-09-18 76.9 922.05 177,085 177,085 230,359 12,469
6 months ago 2018-06-18 87.2 923.88 200,766 200,766 230,359 13,412
1 year ago 2017-12-18 85.6 923.62 197,296 197,296 230,359 13,278
*

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 2018-12-18 15:00 926.41 926.0 0.4 into flood pool
1 hour prior 2018-12-18 14:00 926.41 926.0 0.4 into flood pool
2 hours prior 2018-12-18 13:00 926.42 926.0 0.4 into flood pool
6 hours prior 2018-12-18 09:00 926.43 926.0 0.4 into flood pool
12 hours prior 2018-12-18 03:00 926.41 926.0 0.4 into flood pool
24 hours prior 2018-12-17 15:00 926.39 926.0 0.4 into flood pool
48 hours prior 2018-12-16 15:00 926.31 926.0 0.3 into flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1966-01-01
Vertical datum NGVD29
Gauge USGS:07314800
Dead pool elevation 874.0 ft above NGVD29
Service spillway crest elevation 926.0 ft above NGVD29
Maximum design elevation 939.5 ft above NGVD29
Top of dam elevation 944.0 ft above NGVD29
Conservation pool elevation 926.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2001-06-01 (source: twdb) : GIS Data
2013-09-01 (source: twdb) : GIS Data

Lake Location