Sunny Slope

DRY CREEK· Larimer, Colorado· Earth· 16 ft tall
Significant Hazard Irrigation Private

Key Takeaway

Sunny Slope is classified as significant hazard in Colorado. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 16 ft (taller than 23.3% in CO)
Dam Length585 ft
Dam TypeEarth
Max Storage664 acre-ft
Normal Storage480 acre-ft
Surface Area30 acres
Drainage Area1 sq mi
Max Discharge2,894 cfs
Year Modified1966
NID IDCO01196

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

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

Emergency Action Plan: Yes
Last Inspection: July 19, 2019
State Regulated: Yes
Regulatory Agency: DWR

Ownership

SUNNY SLOPE RESERVOIR, INC. (IVAR LARSON)

Private

Nearby Dams

Berthoud

Larimer, CO

Significant Hazard 18 ft

Loveland Lake

Larimer, CO

Significant Hazard 26 ft

Hummel

Weld, CO

Low Hazard 15 ft

Baxter

Weld, CO

Low Hazard 8 ft

De France

Weld, CO

Low Hazard 15 ft

Handy

Larimer, CO

High Hazard 34 ft

Ide and Starbird #2

Weld, CO

Low Hazard 10 ft

Lone Tree

Larimer, CO

Significant Hazard 29 ft

Frequently Asked Questions

What is the hazard classification of Sunny Slope?

Sunny Slope is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Sunny Slope?

Sunny Slope is owned by SUNNY SLOPE RESERVOIR, INC. (IVAR LARSON) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

What is the primary purpose of Sunny Slope?

Sunny Slope serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Sunny Slope?

Sunny Slope has a dam height of 16 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 Sunny Slope last inspected?

Sunny Slope was last inspected on July 19, 2019. 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.