Round Butte Dam
Dam in Jefferson County, Oregon · Deschutes River · forms Lake Billy Chinook
Height
440 ft
134 m (NID height)
Length
1,450 ft
442 m
Completed
1964
Lake Billy Chinook today
1,942.57 ft
7 days ▼ 0.13 ft
Normal storage
535,000 acre-ft
Below normal for the date
Reservoir level measured Oct 23, 2026, 1:15 PM PDT. Full level page →
Facts
- Purposes
- Hydroelectric; Recreation
- Dam type
- Rockfill
- Structural height
- 440 ft
- Owner
- Private
- Maximum storage
- 535,000 acre-ft
- Surface area
- 4,000 acres
- Hydraulic height
- 425 ft
- Drainage area
- 7,514 sq mi
- Spillway
- Controlled, 36 ft wide
- Army Corps district
- Portland District
- Also known as
- Billy Chinook Lake
- NID ID
- OR00549
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Aug 26, 2026. Search NID ID OR00549 at nid.sec.usace.army.mil. Project website.