Lake Arrowhead: 100.0% full as of 2020-09-20

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 2020-09-20 100.0 926.06 231,231 230,359 230,359 - n.a. -
Yesterday 2020-09-19 100.0 926.08 231,522 230,359 230,359 - n.a. -
2 days ago 2020-09-18 100.0 926.10 231,812 230,359 230,359 - n.a. -
1 week ago 2020-09-13 100.0 926.21 233,417 230,359 230,359 - n.a. -
1 month ago 2020-08-20 94.9 925.17 218,498 218,498 230,359 14,078
3 months ago 2020-06-20 97.5 925.60 224,598 224,598 230,359 14,300
6 months ago 2020-03-20 94.1 925.05 216,812 216,812 230,359 14,016
1 year ago 2019-09-20 91.5 924.61 210,695 210,695 230,359 13,789
*

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 2020-09-20 15:00 926.05 926.00 0.05 into flood pool
1 hour prior 2020-09-20 14:00 926.06 926.00 0.06 into flood pool
2 hours prior 2020-09-20 13:00 926.06 926.00 0.06 into flood pool
6 hours prior 2020-09-20 09:00 926.06 926.00 0.06 into flood pool
12 hours prior 2020-09-20 03:00 926.05 926.00 0.05 into flood pool
24 hours prior 2020-09-19 15:00 926.08 926.00 0.08 into flood pool
48 hours prior 2020-09-18 15:00 926.10 926.00 0.10 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 874.00 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