Deer Flat Upper Dam
Dam in Canyon County, Idaho · Boise River Os · forms Lake Lowell
Height
74 ft
23 m (NID height)
Length
4,165 ft
1,269 m
Completed
1908
Lake Lowell today
2,525.62 ft
7 days ▼ 0.05 ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Irrigation
- Dam type
- Earth
- Structural height
- 73 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 159,365 acre-ft
- Surface area
- 10,100 acres
- Hydraulic height
- 65 ft
- Drainage area
- 92 sq mi
- Spillway
- Uncontrolled, 950 ft wide
- Army Corps district
- Walla Walla District
- Also known as
- Lake Lowell
- NID ID
- ID00276
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID ID00276 at nid.sec.usace.army.mil. Project website.
Other dams at Lake Lowell
- Deer Flat Lower Dam
- Deer Flat Middle Dike
- Deer Flat East Dike
- Deer Flat Middle