Question: What type of water transportation system did both the Rapidan Dam Canal of the Rappahannock Navigation and the Main Line of Public Works work to establish?
Sentence (from "Rapidan Dam Canal of the Rappahannock Navigation"): The Confluence, the name used on maps of the day and sometimes maps of today to denote where the two rivers meet, is located where the borders of the Virginia Counties of Spotsylvania, Stafford and Culpeper meet but is owned by the City of Fredericksburg, Virginia.
Relevant evidence: No