List Of Oregon State Historic Preservation Office References. Oregon state historic preservation office (shpo): The oregon parks and recreation department (oprd), [1] officially known (in state law) as the state parks and recreation department, [2] is the government agency of the u.s.

Oregon state historic preservation office (shpo): The shpo provides guidance on historic preservation regulations, incentives, tax credits, and technical assistance for property owners. The oregon parks and recreation department (oprd), [1] officially known (in state law) as the state parks and recreation department, [2] is the government agency of the u.s.