Our 2021 Erickson Engineering calendars have been sent out. If you are not on our mailing list and would like one, or if you want additional copies, let us know. Bridges in the 2021 calendar include: Marshall County Bridge 45577 on CR 144 Rock County Bridge 67574 on CR 52 Trail Bridge R0773 at Crystal Lake Golf Course Olmsted County Bridge 55595 on CSAH 32 […]