"These prehistoric mounds consist of three geometric earthworks and five burial mounds and are considered to belong to the Middle Woodland period dating to 200 B.C. - A.D. 400. Since first mapped in the 1880's, numerous archaeological investigations have occurred. Professional excavations were conducted in 1922 and 1961... Due to disturbance by farming activities, several of the mounds are difficult to see with the untrained eye. However, because of their excellent condition below plow depth and significance as one of the few remaining prehistoric community centers in the state [Ohio], this site has great interpretive and archaeological opportunities"
The City of Dublin compiled a 2011 master plan for the Holder-Wright Farm and Earthworks which can be viewed here.
http://dublinohiousa.gov/dev/dev/wp-content/uploads/2012/09/Holder-Wright-Presentation.pdf
In summary, the plan will is to "preserve and showcase the ancient earthworks, farm house, and natural features that are a significant part of Dublin's history... The Holder-Wright home will be renovated to its historic stature, and will serve as an interpretive center for the entire park. In addition, an interactive demonstration earthwork, children's natural play area and observation deck overlooking the rugged terrain of Wright Run will be constructed to
enhance the educational and recreational focus of the park."
https://newarkearthworkscenter.blogspot.com/2014/04/holder-wright-earthworks-dublin-ohio.html
http://dublinohiousa.gov/dev/dev/wp-content/uploads/2012/09/Holder-Wright-Presentation.pdf
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