this appears to have been part of an effort to map an abandoned road and bridge. The bridge appears to be completely gone except for a support structure in the river. This support structure is a bit to the east of the mapped bridge and it's orientation is such that the bridge on the east side would connect directly to the mapped service road. The "trail" on the south side of the river has no heat map activity but the trail on the north side of the river does have heat map activity that terminates at the river to the east of where it is currently mapped. 