Rattlesnake Ranch No.2 (Lower)

COYOTE WASH· San Juan, Utah· Built 1972· Earth·
Significant Hazard Irrigation Private

Key Takeaway

Rattlesnake Ranch No.2 (Lower) is classified as significant hazard in Utah. It was completed in 1972 and is 54 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Length780 ft
Dam TypeEarth
Max Storage420 acre-ft
Normal Storage377 acre-ft
Drainage Area4 sq mi
Year Completed1972 (54 years old)
NID IDUT00253

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: June 16, 2022
State Regulated: Yes
Regulatory Agency: Utah Division of Water Rights

Ownership

JIM BLANKENAGEL

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Rattlesnake Ranch No.2 (Lower)?

Rattlesnake Ranch No.2 (Lower) 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 Rattlesnake Ranch No.2 (Lower)?

Rattlesnake Ranch No.2 (Lower) is owned by JIM BLANKENAGEL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Rattlesnake Ranch No.2 (Lower) built?

Rattlesnake Ranch No.2 (Lower) was completed in 1972, making it 54 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 Rattlesnake Ranch No.2 (Lower)?

Rattlesnake Ranch No.2 (Lower) serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Rattlesnake Ranch No.2 (Lower) last inspected?

Rattlesnake Ranch No.2 (Lower) was last inspected on June 16, 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.