Northern Pacific Engineering Drawing: Proposed Ventilating Nozzle Change, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB017512
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Proposed Connection Nozzle, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB025494
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Proposed Concrete Work South, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB017510
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Proposed Concrete Work North, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB017509
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Proposed Change Pipe, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB025520
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Proposed Blower and Ventilating, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB017511
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Plan of Layout, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB025473
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Piping Plans, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB025519
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Nozzle Foundation, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB025482
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Mooring Details Fan, Mullan Tunnel, Blossburg, Montana, undated

• US WaBuPNRA D0027-004-009-008-008-BB017514
• Item
• undated

Part of Timothy Miller Collection