This project included environmental planning, permitting, and archaeological survey. The culvert widened approximately 300 feet of a major road and included the replacement of an undersized culvert to address flooding along Burlingame Creek.
Cardno led the design of the culvert along with other design elements, which included:
- realigning the creek flow path
- designing for fish passage
- relocating a 12-inch high pressure water line
- upsizing and relocating a 12-inch sanitary trunk line to an 18-inch line
- designing a new stormwater treatment facility for road improvements
- and downstream creek stabilization and restoration.
The design of the culvert included upstream and downstream headwalls. The headwalls and culvert were tied together and designed to receive vehicle impacts.
Cardno led the permitting process, including Oregon Department of State Lands (ODSL) and U.S. Army Corps of Engineers permits, including an archaeological survey.
During the ODSL’s review period, the Confederated Tribes of Grande Ronde requested a pedestrian and subsurface archaeological survey of the project area as well as the development of an inadvertent discovery plan (IDP) for the project.
Cardno coordinated with the City of Gresham, ODSL, and the Confederated Tribes of Grand Ronde to develop the survey design, execute the field study, and technical reporting.
Cardno also prepared the IDP as an attachment to the report. The report was submitted to all stakeholders, including the Oregon State Historic Preservation Office (SHPO).