Hells Canyon
Dam in Adams County, Oregon · Snake River · forms Hells Canyon Lake
Height
330 ft
101 m (NID height)
Length
910 ft
277 m
Completed
1967
Hells Canyon Lake today
1,683.35 ft
7 days ▲ 1.31 ft
Normal storage
170,000 acre-ft
Much below normal for the date
Reservoir level measured Oct 22, 2026, 12:00 AM PDT. Full level page →
Facts
- Purposes
- Hydroelectric; Navigation; Recreation
- Dam type
- Gravity
- Structural height
- 330 ft
- Owner
- Private
- Maximum storage
- 188,000 acre-ft
- Surface area
- 2,430 acres
- Hydraulic height
- 323 ft
- Drainage area
- 73,300 sq mi
- Spillway
- Controlled
- Army Corps district
- Walla Walla District
- Also known as
- Hells Canyon
- NID ID
- ID00055
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID ID00055 at nid.sec.usace.army.mil. Project website.