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The following diagrams from the Historic American Engineering Record (HAER) show diagrams of bridges on Rock Creek & the Potomac Parkway. Search the Resource Bank for HAER to find more historical drawings from this organization.
The following diagrams from the Historic American Engineering Record (HAER) show diagrams of bridges of Rock Creek & Potomac Parkway. Search the Resource Bank for HAER to find more historical drawings from this organization.
External Links:
More Information:
www.cr.nps.gov/habshaer
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Plan/section details: