Environmental Clearances

State Historic Preservation Office/Threatened & Endangered Species

Prior to road construction, the RCOC Environmental Concerns division is behind the scenes doing extensive research into the natural history of the area. a construction project that receives federal funding must obtain clearance from the State Historic Preservation Office (SHPO). Additionally, RCOC reviews information about the threatened and endangered species that may have habitat in the area and will determine if there is potential for any endangered species to be impacted by our road projects and maintenance work. The RCOC strives to preserve historic structures and protect species habitat.

For more information regarding the SHPO programs and threatened & endangered species in Michigan, please follow the links below:

Poweshiek Skipperling on a Flower
Snuffbox Mussel


RCOC works to preserve and/or mitigate impacts to the wetlands from construction and maintenance projects. RCOC also maintains a wetland bank at the Lyon Oaks park to offset any unavoidable impacts. For more information, go to the Lyon Oaks restoration project.
Interns in Foiliage
Wildflowers in a Meadow


Part of the environmental review for federally -funded projects includes outreach to relevant tribal communities to ensure no significant properties are adversely affected. In Oakland County, the tribes consulted are: Bay Mills, Keweenaw Bay, Lac Vieux Desert Band and Pokagon Band.