Bluff Lake Diversion

NEETS CREEK· Ketchikan Gateway Borough, Alaska· Built 1984· Rockfill· 10 ft tall
Low Hazard Hydroelectric Water Supply Private

Key Takeaway

Bluff Lake Diversion is classified as low hazard in Alaska. It was completed in 1984 and is 42 years old. Its primary use is hydroelectric.

Physical Details

Dam Height 10 ft (taller than 11.8% in AK)
Dam Length59 ft
Dam TypeRockfill
Max Storage1.5K acre-ft
Normal Storage1.0K acre-ft
Surface Area154 acres
Drainage Area7 sq mi
Max Discharge1,900 cfs
Year Completed1984 (42 years old)
NID IDAK00184

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 13, 2018
State Regulated: Yes
Regulatory Agency: AKDNR

Ownership

SOUTH SE REGION AQUACULTURE ASSOC

Private

Frequently Asked Questions

What is the hazard classification of Bluff Lake Diversion?

Bluff Lake Diversion 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 Bluff Lake Diversion?

Bluff Lake Diversion is owned by SOUTH SE REGION AQUACULTURE ASSOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Bluff Lake Diversion built?

Bluff Lake Diversion was completed in 1984, making it 42 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 Bluff Lake Diversion?

Bluff Lake Diversion serves the following purposes: Hydroelectric, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Bluff Lake Diversion?

Bluff Lake Diversion has a dam height of 10 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 Bluff Lake Diversion last inspected?

Bluff Lake Diversion was last inspected on September 13, 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.