Sysladobsis Lake

West Branch St. Croix River· Washington, Maine· Built 1861· Earth· 9 ft tall
Low Hazard Hydroelectric Private

Key Takeaway

Sysladobsis Lake is classified as low hazard in Maine. It was completed in 1861 and is 165 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 9 ft (taller than 13% in ME)
Dam Length250 ft
Dam TypeEarth
Max Storage123.6K acre-ft
Normal Storage123.6K acre-ft
Surface Area5,400 acres
Drainage Area162 sq mi
Max Discharge1,100 cfs
Year Completed1861 (165 years old)
NID IDME00602

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: September 27, 2018
State Regulated: No

Ownership

Woodland Pulp, LLC

Private

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Sysladobsis Lake?

Sysladobsis Lake 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 Sysladobsis Lake?

Sysladobsis Lake is owned by Woodland Pulp, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Sysladobsis Lake built?

Sysladobsis Lake was completed in 1861, making it 165 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 Sysladobsis Lake?

Sysladobsis Lake 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 Sysladobsis Lake?

Sysladobsis Lake has a dam height of 9 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 Sysladobsis Lake last inspected?

Sysladobsis Lake was last inspected on September 27, 2018. 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.