(Above) View of the Hill Annex Mine surface facilities from a waste rock dump.

(Right)  MHAers and their tour guide examine historic pictures of the Hill Annex Mine site.

Iron ore was conveyed from the pit to the Hill Annex beneficiation plant which used heavy-media separation to upgrade lower grade ores.  High-grade direct shipping ores required only crushing and screening.

The State Park Office served a variety of purposes over the years, first as an employee clubhouse and then as the Mine Superintendent’s office and Laboratory.

The Mine Superintendent could sit as his roll-top desk and see the open pit from his window.

The Mine Engineer, assisted by surveyors and draftsmen, designed the pit and scheduled production so that the ore shipped would meet customer specifications.

The Hill Annex has an extensive chemical laboratory that could assay pit samples from blast hole drills as well as quality control samples from the beneficiation plant and ore shipments.