Whittier Narrows Dam
Dam in Los Angeles County, California · San Gabriel River · forms Whittier Narrows Reservoir
Height
56 ft
17 m (NID height)
Length
16,960 ft
5,169 m
Completed
1957
Whittier Narrows Reservoir today
186.00 ft
7 days ▲ 0.39 ft
vs full pool
▼ 15.60 ft
Reservoir level measured Oct 23, 2026, 12:00 PM PDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Recreation; Water Supply
- Dam type
- Earth
- Owner
- USACE - Los Angeles District (Federal)
- Maximum storage
- 66,702 acre-ft
- Surface area
- 1 acres
- Hydraulic height
- 56 ft
- Drainage area
- 554 sq mi
- Spillway
- Controlled, 450 ft wide
- Army Corps district
- Los Angeles District
- Also known as
- Whittier Narrows Reservoir
- NID ID
- CA10027
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 8, 2026. Search NID ID CA10027 at nid.sec.usace.army.mil. Project website.