Westerdoll Lake

BIG THOMPSON RIVER-OS· Larimer, Colorado· Built 1900· Earth· 11 ft tall
Low Hazard Irrigation Flood Risk Reduction Private

Key Takeaway

Westerdoll Lake is classified as low hazard in Colorado. It was completed in 1900 and is 126 years old. Its primary use is irrigation.

Physical Details

Dam Height 11 ft (taller than 8.7% in CO)
Dam Length250 ft
Dam TypeEarth
Max Storage311 acre-ft
Normal Storage229 acre-ft
Surface Area38 acres
Drainage Area0 sq mi
Max Discharge875 cfs
Year Completed1900 (126 years old)
NID IDCO02792

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: No
Last Inspection: August 13, 2009
State Regulated: Yes
Regulatory Agency: DWR

Ownership

SEVEN LAKES RESERVOIR CO. (DAN KAMMERZELL)

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Westerdoll Lake?

Westerdoll Lake is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Westerdoll Lake?

Westerdoll Lake is owned by SEVEN LAKES RESERVOIR CO. (DAN KAMMERZELL) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Westerdoll Lake built?

Westerdoll Lake was completed in 1900, making it 126 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Westerdoll Lake?

Westerdoll Lake serves the following purposes: Irrigation, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Westerdoll Lake?

Westerdoll Lake has a dam height of 11 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Westerdoll Lake last inspected?

Westerdoll Lake was last inspected on August 13, 2009. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.