Stoneybrook Farm Lake Dam

Stoneybrook Farm Lake Dam is an earth dam located in Warren County, Ohio, built in 1968. It carries a Significant hazard potential classification and has a fair condition assessment.

About Stoneybrook Farm Lake Dam

The primary purpose of Stoneybrook Farm Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Helen R. Lemay (private). It impounds the Tributary To Newman Run near Oregonia.

The dam stands 45 feet tall and stretches 345 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 76 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1968, the structure is well into its service life at over 50 years old.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/07/2024.

At 45 feet, this dam is taller than 91% of dams nationwide.

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Significant HazardFair ConditionEmergency Action Plan: No

Location

StateOhio
CountyWarren
Nearest CityOregonia
River/StreamTributary To Newman Run
Coordinates39.52556, -84.10528

Physical Characteristics

Dam TypeEarth
NID Height45 ft
Dam Height45 ft
Dam Length345 ft
Year Completed1968 (58 years old)

Storage & Hydraulics

NID Storage76 acre-ft
Max Storage76 acre-ft
Normal Storage42 acre-ft
Surface Area4 acres
Drainage Area0 sq mi
Max Discharge698 cfs

Ownership & Safety

PurposeRecreation
OwnerHelen R. LeMay
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentFair
Last Inspection05/07/2024
Emergency Action PlanNo

Identifiers

NID IDOH00559
Federal IDOH00559
More InfoState Dam Safety Program

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