Seven Reverse Y #1

WILLOW CREEK· Weld, Colorado· Built 1965· Earth· 20 ft tall

Key Takeaway

Seven Reverse Y #1 is classified as low hazard in Colorado. It was completed in 1965 and is 61 years old. Its primary use is irrigation.

Physical Details

Dam Height 20 ft (taller than 36.1% in CO)
Dam Length630 ft
Dam TypeEarth
Max Storage273 acre-ft
Normal Storage10 acre-ft
Surface Area5 acres
Drainage Area59 sq mi
Max Discharge10,690 cfs
Year Completed1965 (61 years old)
NID IDCO00063

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: May 7, 2009
State Regulated: Yes
Regulatory Agency: DWR

Ownership

JAMES KONIG (SAME)

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Seven Reverse Y #1?

Seven Reverse Y #1 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 Seven Reverse Y #1?

Seven Reverse Y #1 is owned by JAMES KONIG (SAME) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Seven Reverse Y #1 built?

Seven Reverse Y #1 was completed in 1965, making it 61 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 Seven Reverse Y #1?

Seven Reverse Y #1 serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Seven Reverse Y #1?

Seven Reverse Y #1 has a dam height of 20 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 Seven Reverse Y #1 last inspected?

Seven Reverse Y #1 was last inspected on May 7, 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.