Twin Lake #1

SURFACE CREEK-TR· Delta, Colorado· Built 1889· Earth· 21 ft tall
Low Hazard Irrigation Recreation Private

Key Takeaway

Twin Lake #1 is classified as low hazard in Colorado. It was completed in 1889 and is 137 years old. Its primary use is irrigation.

Physical Details

Dam Height 21 ft (taller than 40.7% in CO)
Dam Length240 ft
Dam TypeEarth
Max Storage110 acre-ft
Normal Storage82 acre-ft
Surface Area14 acres
Drainage Area0 sq mi
Max Discharge45 cfs
Year Completed1889 (137 years old)
NID IDCO00634

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: October 3, 2022
State Regulated: Yes
Regulatory Agency: DWR

Ownership

TWIN LAKE RESEVOIR PARTNERS

Private

Nearby Dams

Twin Lake #2

Delta, CO

Low Hazard 10 ft

Sackett

Delta, CO

Low Hazard 20 ft

Kehmeier

Delta, CO

Low Hazard 27 ft

Weir and Johnson

Delta, CO

High Hazard 21 ft

Bonita

Delta, CO

Low Hazard 28 ft

Cedar Mesa

Delta, CO

High Hazard 47 ft

Trio

Delta, CO

Low Hazard 28 ft

Leon Park

Delta, CO

Low Hazard 27 ft

Frequently Asked Questions

What is the hazard classification of Twin Lake #1?

Twin Lake #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 Twin Lake #1?

Twin Lake #1 is owned by TWIN LAKE RESEVOIR PARTNERS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Twin Lake #1 built?

Twin Lake #1 was completed in 1889, making it 137 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 Twin Lake #1?

Twin Lake #1 serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Twin Lake #1?

Twin Lake #1 has a dam height of 21 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 Twin Lake #1 last inspected?

Twin Lake #1 was last inspected on October 3, 2022. 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.