Alum Creek Lake

Alum Creek Lake is a man-made reservoir located in Delaware County, Ohio, United States.

On April 24, 1975, during a periodic inspection of the completed dam, the US Army Corps of Engineers expressed concern about the safety of the spillway monoliths.

Twelve, 6 inches (150 mm) diameter core holes were drilled in the raceway directly in front of the ogee weirs.

[citation needed] To prevent the concrete monolith from sliding forward, it was decided to install seven cable anchors deep into the bedrock.

This extreme event was caused by an average of 5–8 inches (130–200 mm) of rain falling over Central Indiana and Ohio during January 4–14, 2005.

Alum Creek Lake is popular with locals and regional tourists alike with its fishing, picnicking, boating, disc golf course, kitesurfing and hiking opportunities.

When the dam was constructed in 1974 it was out in the country. Today, modern homes reach nearly to the base of the dam. View from the top of the dam looking south.
Alum Creek Dam spillway. Water is normally discharged through the hole in the far wall. Three large gates can be opened to provide emergency control under high water conditions. The retrofit cables were installed in the large flat calming section at the base of the dam.
The Alum Creek Dam spillway is perched high on the abutment; this prompted concerns within the Army Corps of Engineers about deep-seated sliding.