The majority of the material in this series was originally in two boxes labeled "Industrial Relations - Historical". The material was left in its original order, and the original folder headings were retained. It consists mainly of labor relations material and notes on bargaining sessions with the unions. The drafts of the contract with the International Union of Mine, Mill and Smelter Workers and its local #18 are arranged by article number. Also in those folders are notes on the progress of the bargaining sessions. One group of material containing negotiation and strike material, memos, broadsides, newspaper clippings, and news releases was not in a folder and was therefore labeled "Miscellaneous". Another group of material concerns the National Labor Relations Board election which decided which unions would represent Bunker Hill workers. The two folders titled Recap of carpenters and machinists, blacksmiths, welders, and painters, contains bound volumes of detailed job descriptions for each employee in those classifications.

Other material in this series includes lists of hires, quits, retirements, and pension plan arrangements.