The bridge is the typical prestressed concrete girder structure. It has wide shoulders and modern guardrails, a nice luxury for a bridge that is so lightly used. The river crossing is divided into three equal length spans of 49 feet each. The mid-span joints are supported by two sets of piers. The piers are constructed by driving steel pipes into the riverbed, and topping off the pipes with a reinforced concrete pier cap. The steel pipes on the outside end of each pier is set at an angle to give the pier side to side strength. This allows a rather light structure to support the required highway load weights.
Highway CSAH-108 was rebuilt and realigned on a new path when this bridge was built in 1989. The old roadway made a sweeping S-curve to wind between several oxbow loops in the Saint Louis River. One of these loops was cut off, and the road was rebuilt along a nearly straight north and south path. The approaches to the old bridge still exist, as well as the foundation for a bridge pier.
The photo above is looking north down the center of the Lost Lake Road Bridge. The photo below is looking northeast across the bridge deck from near the southwest corner of the structure. The sky in these two photos is totally clear and dark blue, something that is relatively uncommon in summer near Lake Superior, especially in the afternoon.