Lake Arrowhead: 90.9% full as of 2019-09-20

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 2019-09-20 90.9 924.52 209,456 209,456 230,359 13,743
Yesterday 2019-09-19 91.0 924.53 209,593 209,593 230,359 13,748
2 days ago 2019-09-18 91.1 924.55 209,869 209,869 230,359 13,758
1 week ago 2019-09-13 91.1 924.55 209,869 209,869 230,359 13,758
1 month ago 2019-08-20 92.8 924.84 213,880 213,880 230,359 13,908
3 months ago 2019-06-20 99.4 925.90 228,911 228,911 230,359 14,454
6 months ago 2019-03-20 100.0 926.12 232,104 230,359 230,359 - n.a. -
1 year ago 2018-09-20 76.6 922.00 176,462 176,462 230,359 12,443
*

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 2019-09-20 15:00 924.56 926.00 -1.44 below flood pool
1 hour prior 2019-09-20 14:00 924.57 926.00 -1.43 below flood pool
2 hours prior 2019-09-20 13:00 924.52 926.00 -1.48 below flood pool
6 hours prior 2019-09-20 09:00 924.52 926.00 -1.48 below flood pool
12 hours prior 2019-09-20 03:00 924.51 926.00 -1.49 below flood pool
24 hours prior 2019-09-19 15:00 924.55 926.00 -1.45 below flood pool
48 hours prior 2019-09-18 15:00 924.55 926.00 -1.45 below 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 874.00 ft above NGVD29
Service spillway crest elevation 926.00 ft above NGVD29
Maximum design elevation 939.55 ft above NGVD29
Top of dam elevation 944.00 ft above NGVD29
Conservation pool elevation 926.00 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