Ross
Dam in Whatcom County, Washington · Skagit River · forms Ross Reservoir
Height
540 ft
165 m (NID height)
Length
1,300 ft
396 m
Completed
1949
Ross Reservoir today
1,574.37 ft
7 days ▼ 3.95 ft
vs full pool
▼ 17.73 ft
Normal storage
1,435,000 acre-ft
Below normal for the date
Reservoir level measured Oct 23, 2026, 8:00 AM PDT. Full level page →
Facts
- Purposes
- Hydroelectric; Fish and Wildlife Pond; Recreation; Flood Risk Reduction
- Dam type
- Concrete
- Structural height
- 540 ft
- Owner
- City of Seattle (Local Government)
- Maximum storage
- 1,452,750 acre-ft
- Surface area
- 11,680 acres
- Hydraulic height
- 395 ft
- Drainage area
- 978 sq mi
- Spillway
- Controlled
- Army Corps district
- Seattle District
- NID ID
- WA00169
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Aug 26, 2026. Search NID ID WA00169 at nid.sec.usace.army.mil. Project website.