Mill Picayune Watershed Site S-10-7

TR-PICAYUNE CREEK· Harrison, Iowa· Built 1962· Earth· 45 ft tall
Low Hazard Fire Protection Stock Or Small Fish Pond Flood Risk Reduction Local Government

Key Takeaway

Mill Picayune Watershed Site S-10-7 is classified as low hazard in Iowa. It was completed in 1962 and is 64 years old. Its primary use is fire protection.

Physical Details

Dam Height 45 ft (taller than 91.4% in IA)
Dam Length515 ft
Dam TypeEarth
Max Storage108 acre-ft
Normal Storage68 acre-ft
Surface Area5 acres
Drainage Area0 sq mi
Max Discharge0 cfs
Year Completed1962 (64 years old)
NID IDIA00469

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: IOWA DNR

Ownership

Harrison County SWCD

Local Government

Nearby Dams

Mill Picayune Watershed Site S-10-1

Harrison, IA

Low Hazard 51 ft

Mill Picayune Watershed Site S-10-2

Harrison, IA

Low Hazard 49 ft

Heistand/Erlewine Dam

Harrison, IA

Low Hazard 31 ft

Mill Picayune Watershed Site S-8-2

Harrison, IA

Low Hazard 48 ft

Heistand/Swain Dam

Harrison, IA

Low Hazard 26 ft

Mill Picayune Watershed Site S-32-1

Harrison, IA

Low Hazard 34 ft

Mill Picayune Watershed Site S-4

Harrison, IA

Low Hazard 29 ft

Mill Picayune Watershed Site S-8-1

Harrison, IA

Low Hazard 30 ft

Frequently Asked Questions

What is the hazard classification of Mill Picayune Watershed Site S-10-7?

Mill Picayune Watershed Site S-10-7 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 Mill Picayune Watershed Site S-10-7?

Mill Picayune Watershed Site S-10-7 is owned by Harrison County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Mill Picayune Watershed Site S-10-7 built?

Mill Picayune Watershed Site S-10-7 was completed in 1962, making it 64 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 Mill Picayune Watershed Site S-10-7?

Mill Picayune Watershed Site S-10-7 serves the following purposes: 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 Mill Picayune Watershed Site S-10-7?

Mill Picayune Watershed Site S-10-7 has a dam height of 45 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.