Rockville Lake Dam

BLACK CREEK· Allegany, New York· Built 1977· 12 ft tall
Low Hazard Recreation Not Listed

Key Takeaway

Rockville Lake Dam is classified as low hazard in New York. It was completed in 1977 and is 49 years old. Its primary use is recreation.

Physical Details

Dam Height 12 ft (taller than 23.2% in NY)
Dam Length1,000 ft
Max Storage219 acre-ft
Normal Storage96 acre-ft
Surface Area27 acres
Drainage Area24 sq mi
Max Discharge200 cfs
Year Completed1977 (49 years old)
NID IDNY00923

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: May 22, 2002
State Regulated: Yes
Regulatory Agency: NYS DEC

Ownership

Not Listed

Nearby Dams

Caneadea Dam

Allegany, NY

High Hazard 140 ft

Bomac Lake Dam

Allegany, NY

Low Hazard 22 ft

Cuba Lake Dam

Allegany, NY

High Hazard 55 ft

State Dam At Belmont

Allegany, NY

Low Hazard 11 ft

Cuba Lake Outlet Spillway Dam

Allegany, NY

Significant Hazard 9 ft

Arling Saunders Pond Dam

Allegany, NY

Significant Hazard 13 ft

Amity Lake Dam

Allegany, NY

Significant Hazard 22 ft

Frequently Asked Questions

What is the hazard classification of Rockville Lake Dam?

Rockville Lake Dam 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 Rockville Lake Dam?

Rockville Lake Dam is owned by information not available (Not Listed). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Rockville Lake Dam built?

Rockville Lake Dam was completed in 1977, making it 49 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 Rockville Lake Dam?

Rockville Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Rockville Lake Dam?

Rockville Lake Dam has a dam height of 12 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 Rockville Lake Dam last inspected?

Rockville Lake Dam was last inspected on May 22, 2002. 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.