Lake Arrowhead: 87.6% full as of 2025-05-05

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 2025-05-05 87.6 923.96 201,841 201,841 230,359 13,454
1 day prior 2025-05-04 86.9 923.83 200,096 200,096 230,359 13,387
2 days prior 2025-05-03 85.3 923.56 196,501 196,501 230,359 13,247
1 week prior 2025-04-28 74.0 921.51 170,427 170,427 230,359 12,190
1 month prior 2025-04-05 66.4 920.03 152,951 152,951 230,359 11,427
3 months prior 2025-02-05 68.0 920.35 156,634 156,634 230,359 11,592
6 months prior 2024-11-05 63.7 919.48 146,744 146,744 230,359 11,143
1 year prior 2024-05-05 61.8 919.08 142,328 142,328 230,359 10,937
*

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 2025-05-05 21:00 924.01 926.00 -1.99
1 hour prior 2025-05-05 20:00 924.01 926.00 -1.99
2 hours prior 2025-05-05 19:00 924.00 926.00 -2.00
6 hours prior 2025-05-05 15:00 924.01 926.00 -1.99
12 hours prior 2025-05-05 09:00 923.96 926.00 -2.04
24 hours prior 2025-05-04 21:00 923.90 926.00 -2.10
48 hours prior 2025-05-03 21:00 923.66 926.00 -2.34
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1966-01-01
Vertical datum NGVD29
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
Data Source USGS:07314800

Lake Location