Northern Pacific Engineering Drawing: Details Retaining Wall, Tunnel Number 6, Near Quartz, Montana, Line Segment 042, Milepost 170.7. Sheet 1259 - 11, undated.
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Scope note(s)
A Pacific Northwest Railroad Archive subject. An engineering drawing of a structure designed to allow passage of trains underground.
Source note(s)
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Hierarchical terms
Railroad tunnel drawings
Railroad tunnel drawings
Equivalent terms
Railroad tunnel drawings
UF Railroad tunnels
UF Tunnels