Flatiron Dam
Dam in Larimer County, Colorado · Dry Creek-Tr, Chimney Hollow Creek · forms Flatiron Reservoir
Height
86 ft
26 m (NID height)
Length
1,725 ft
526 m
Completed
1953
Flatiron Reservoir today
5,465.48 ft
7 days ▼ 2.40 ft
Normal storage
760 acre-ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Hydroelectric; Irrigation
- Dam type
- Earth
- Structural height
- 86 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 1,136 acre-ft
- Surface area
- 381,500 acres
- Hydraulic height
- 55 ft
- Drainage area
- 7 sq mi
- Spillway
- Uncontrolled, 75 ft wide
- Army Corps district
- Omaha District
- Also known as
- Flatiron Reservoir
- NID ID
- CO01654
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID CO01654 at nid.sec.usace.army.mil. Project website.