Just outside of Glen Arbor, a well-traveled section of County Road 675 is imperiled as it crosses three sets of undersized culverts slowly crumbling into the Crystal River. That’s a multi-million-dollar problem for the Leelanau County Road Commission. The engineering plans call for the construction of a concrete and steel structure to replace the culverts under CR 675 closest to M-22. That will keep the two road surfaces closely matched in elevation. The two sets of culverts further east, including the “shoot-the-tube” culverts, are to be replaced with classic wood bridges providing a lot of headroom for paddlers, ending the need for portages across the road. Plans call for the replacement of the Tucker Lake overflow culvert with a wide and substantial concrete box culvert.