Tunnel that should be part and parcel of Campbell Creek Trail. See, osm.org/note/367913

The actual route was initially intended to use a tunnel that goes under Lake Otis which must be approached by bicycles from the South on the East side of the road. Once on the west side of Lake Otis, one must then ride North a block to 47th. Most people today ride North over the creek to a point opposite East 47th Court and then cross Lake Otis, which is unsafe. There is an on-road bike trail designation on East 47th Court, and the trail head is to be found at the end of the Court.

There IS NO CROSSING HERE!
See Note #367913