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Crabtree Creek Recreational Area (now William B. Umstead State Park) earth dam topography map, location plan, sections, gate tower details, and culvert details. Plan nos. RDP-NC-CC-4001-1-7; RDP-NC-CC-4001-2-7; RDP-NC-CC-4001-3-7; RDP-NC-CC-4001-4-7; RDP-NC-CC-4001-5-7; RDP-NC-CC-4001-6-7; RDP-NC-CC-4001-7-7. F-9.