Methods

File — Tube: 25

Staff Only

Scope and Contents

"Longwall Panel Development and Extraction Plan for Multiple Seam Mining": Qty-1, Form-B
"A Concept for a Super Longwall System" (photo removed and transferred to Multimedia): Qty-1, Form-F
"A Concept for a Super Longwall System": Qty-4, Form-B
"A Concept for a Super Longwall System": Qty-1, Form-V
"Advanced-Retreat Longwall": Qty-1, Form-V
"Illustration of Short Length LW Faces": Qty-1, Form-F
"Illustration of Room and Pillar Method": Qty-1, Form-F
"Conventional Punch Mine": Qty-1, Form-F
"Longwall Punch Mine": Qty-1, Form-F
"Mine Projections": Qty-1, Form-V
"Longwall Panel Development and Extraction Plan for Multiple Seam Mining": Qty-1, Form-V
"Conceptual Mining Plan, Area North of Sufco #1, Mine Plan 2": Qty-1, Form-V
"Longwall Plan for Two Seam Situation": Qty-1, Form-F
"An Illustration of a Long Term Test Mine": Qty-1, Form-B
Longwall Panel Extraction: Qty-1, Form-F
"A Hydraulic Mine Concept for Steep Pitching Seams": Qty-1, Form-B

Dates

1913-1990

Conditions Governing Access

Twenty-four hour advanced notice encouraged. Materials must be used on-site. Access to parts of this collection may be restricted under provisions of state or federal law.