The largest infrastructure project in the history of Holmes County is getting underway this week.  The $9.5 million project will see the Wally Road Bridge, which was built back in 1993, replaced with a covered wooden bridge.  The bridge is located about six miles south of Loudonville and crosses the Mohican River between the Arrow Point and Lost Horizon Campgrounds.  County officials say there were multiples reasons behind the decision to build the new bridge with wood rather than steel and concrete, including aesthetics and supply chain issues.  Another major factor was the durability of treated lumber, which has a life expectancy of 100 years, compared to only 50 years for concrete and steel.  According to the county, the goal is to have the project completed by this time next year.