Johns Creek Dam #2

About Johns Creek Dam #2

The primary purpose of Johns Creek Dam #2 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Mountain Castles Soil And Water Conservation District (local government). It impounds the Little Oregon Creek.

The dam stands 51 feet tall and stretches 633 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 1,334 acre-feet, and collects water from a drainage area of 6 square miles.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/13/2022.

At 51 feet, this dam is taller than 93% of dams nationwide.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Virginia dam safety program can provide more specific information about emergency planning for this structure.

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