Arwpf Lagoon No. 4

Arapahoe, Colorado· Built 2009· Earth· 25 ft tall
Low Hazard Water Supply Other Local Government

Key Takeaway

Arwpf Lagoon No. 4 is classified as low hazard in Colorado. It was completed in 2009 and is 17 years old. Its primary use is water supply.

Physical Details

Dam Height 25 ft (taller than 53.1% in CO)
Dam Length1,104 ft
Dam TypeEarth
Max Storage46 acre-ft
Normal Storage31 acre-ft
Surface Area5 acres
Year Completed2009 (17 years old)
NID IDCO02936

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
State Regulated: Yes
Regulatory Agency: DWR

Ownership

CITY OF AURORA

Local Government

Frequently Asked Questions

What is the hazard classification of Arwpf Lagoon No. 4?

Arwpf Lagoon No. 4 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 Arwpf Lagoon No. 4?

Arwpf Lagoon No. 4 is owned by CITY OF AURORA (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Arwpf Lagoon No. 4 built?

Arwpf Lagoon No. 4 was completed in 2009, making it 17 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 Arwpf Lagoon No. 4?

Arwpf Lagoon No. 4 serves the following purposes: Water Supply, Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Arwpf Lagoon No. 4?

Arwpf Lagoon No. 4 has a dam height of 25 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.

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.