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O'Shaughnessy Dam and Bridge
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View below the dam
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| Location: | Concord Township / Liberty Township, Delaware County, Ohio, USA |
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| Nearest city: | Shawnee Hills, Ohio |
| Built: | 1922 |
| Architect: | Packard,Franklin l.; Thompson-Starrett Co. |
| Architectural style: | Late 19th And 20th Century Revivals, Classical Revival, Second Renaissance Revival |
| Governing body: | Local |
| NRHP Reference#: | 90000482[1] |
| Added to NRHP: | July 5, 1990 |
The O'Shaughnessy Dam is located on the Scioto River near Dublin, Ohio, United States. The dam forms O'Shaughnessy Reservoir, which is a major source of drinking water for the city of Columbus. It was completed in 1925 following recommendations of then superintendent Jerry O'Shaughnessy (for whom the dam was named).[2] At the time, the reservoir was described as "the finest inland waterway in the United States." Located 10 miles (16 km) upstream of the smaller Griggs Dam, it provides a large area for various forms of recreation in addition to its water supply duties. The reservoir holds 6.3 billion US gallons (24,000,000 m3) over a surface area of 845 acres (3.42 km2).[3] The Columbus Zoo and Aquarium is located on the east bank of the reservoir, near the dam.
In 1990, the dam was listed on the National Register of Historic Places.[1]
The city of Columbus installed a hydroelectric operation on the west side of the dam, which was completed in 1987.[4] The turbines can only be operated when there is sufficient flow, which means the dam cannot continuously produce electricity. With a head of 18 feet (5.5 m)[5], the two turbines together produce 5 megawatts.[4][6]
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