MSDGC QD-58 - U.S. Benchmarks on Waymarking.com

Metropolitan Sanitary District of Greater Chicago (as of 1989, named Metropolitan Water Reclamation District of Greater Chicago) survey mark disk, found in Cook County Forest Preserve land in/near Rosemont, Illinois. The disk is on a large poured concrete block, near what I guess might be access to underground works of some sort. There are also some things that I think might be electric pump housings. The disk is stamped with the label QD-58.

The marker is located in the Dam Number 4 Forest Preserve, east of the Des Plaines River, west of East River Road, north of Higgins Road and south of Devon Avenue. The easiest approach is probably along a rough gravel road (blocked to vehicles) running north from Higgins Road just east of the Des Plaines River. An alternate approach would be from the southeast corner, where there is a bike trail which would take one part of the way toward the mark.

I found this mark while bushwacking toward a geocache, namely NIAGARA FALLS, NOT (GCNJ5N), which is not far away.

1. A closeup photo of the mark taken by you is required.
2. A 'distant' photo including the mark in the view is highly recommended. Include the compass direction you faced when you took the picture.