Mill Creek Storage Dam
Dam in Walla Walla County, Washington · Mill Creek Offstream · forms Bennington Lake
Height
145 ft
44 m (NID height)
Length
3,200 ft
975 m
Completed
1942
Bennington Lake today
1,194.98 ft
7 days ▼ 0.31 ft
Normal storage
3,300 acre-ft
Above normal for the date
Reservoir level measured Oct 23, 2026, 1:00 PM PDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Recreation
- Dam type
- Earth
- Structural height
- 145 ft
- Owner
- USACE - Walla Walla District (Federal)
- Maximum storage
- 8,300 acre-ft
- Surface area
- 25 acres
- Hydraulic height
- 120 ft
- Drainage area
- 80 sq mi
- Spillway
- None, 250 ft wide
- Army Corps district
- Walla Walla District
- Also known as
- Bennington Lake
- NID ID
- WA00348
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Jan 31, 2026. Search NID ID WA00348 at nid.sec.usace.army.mil. Project website.
Other dams at Bennington Lake
- Mill Creek Storage Dam - Diversion Dam