Lake Arrowhead: 90.1% full as of 2017-07-25

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.

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 2017-07-25 90.1 924.38 207,537 207,537 230,359 13,670
Yesterday 2017-07-24 90.2 924.40 207,810 207,810 230,359 13,681
2 days ago 2017-07-23 90.3 924.41 207,947 207,947 230,359 13,686
1 week ago 2017-07-18 91.1 924.55 209,869 209,869 230,359 13,758
1 month ago 2017-06-25 93.6 924.96 215,553 215,553 230,359 13,970
3 months ago 2017-04-25 95.8 925.32 220,615 220,615 230,359 14,155
6 months ago 2017-01-25 96.1 925.37 221,323 221,323 230,359 14,181
1 year ago 2016-07-25 93.4 924.93 215,134 215,134 230,359 13,954
*

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 2017-07-25 21:00 924.40 926.0 -1.6 below flood pool
1 hour prior 2017-07-25 20:00 924.41 926.0 -1.6 below flood pool
2 hours prior 2017-07-25 19:00 924.42 926.0 -1.6 below flood pool
6 hours prior 2017-07-25 15:00 924.38 926.0 -1.6 below flood pool
12 hours prior 2017-07-25 09:00 924.39 926.0 -1.6 below flood pool
24 hours prior 2017-07-24 21:00 924.39 926.0 -1.6 below flood pool
48 hours prior 2017-07-23 21:00 - n.a. - - n.a. - - n.a. - 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 ft above NGVD29
Conservation pool elevation 926.0 ft above NGVD29
Maximum design elevation 939.55 ft above NGVD29
Top of dam elevation 944 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