Iron Horse Trail Lower Walnut Creek Channel, Imhoff Drive Connection

The East Bay Regional Park District is forecasting a project to extend the Iron Horse Regional Trail in Concord, California. The scope of work involves extending the trail approximately 1,500 feet north from its current terminus at Marsh Drive to Imhoff Drive by paving an existing compact dirt and gravel access road used by the Flood Control District. The resulting multiuse trail will be 10 to 12 feet wide and include three under-crossings at Marsh Drive, State Route 4 (Walnut Creek Bridge), and Imhoff Drive. Additionally, the project requires at-grade street connections at Imhoff Drive featuring gates, with the southern connection integrating into the existing bike lane. Site preparation will include clearing, grubbing, and the removal of riprap at the Marsh Drive undercrossing. The project is classified under NAICS code 237310 and has been granted a CEQA exemption based on minor alterations to land and existing facilities. Strict environmental and regulatory compliance is required, including adherence to authorizations from the USACE, CDFW, and the San Francisco Regional Water Quality Control Board. Key performance requirements include the use of a qualified biologist for environmental monitoring and preconstruction nesting bird surveys between February 1 and August 31. Furthermore, the project mandates the protection of cultural resources, requiring work to stop within a 100-foot buffer if any resources are identified until an archaeologist can evaluate the find. Rourke Healey serves as the primary point of contact for the agency.