Gilman Mill

Blackman Stream· Penobscot, Maine· Built 1963· Concrete· 15 ft tall
Low Hazard Hydroelectric Private

Key Takeaway

Gilman Mill is classified as low hazard in Maine. It was completed in 1963 and is 63 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 15 ft (taller than 51.7% in ME)
Dam Length250 ft
Dam TypeConcrete
Max Storage86 acre-ft
Normal Storage52 acre-ft
Surface Area20 acres
Drainage Area0 sq mi
Year Completed1963 (63 years old)
NID IDME00577

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: April 8, 2011
State Regulated: Yes
Regulatory Agency: MEMA

Ownership

Kenneth Robertson

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Gilman Mill?

Gilman Mill 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 Gilman Mill?

Gilman Mill is owned by Kenneth Robertson (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Gilman Mill built?

Gilman Mill was completed in 1963, making it 63 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 Gilman Mill?

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

How tall is Gilman Mill?

Gilman Mill has a dam height of 15 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 Gilman Mill last inspected?

Gilman Mill was last inspected on April 8, 2011. 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.