Northern Pacific Engineering Drawing: Floor Plan, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028483
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Floor Plan, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028482
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Strain Sheet, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB025694
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962

• US WaBuPNRA D0027-004-009-008-001-BB028722
• Item
• 1962

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962

• US WaBuPNRA D0027-004-009-008-001-BB028723
• Item
• 1962

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962

• US WaBuPNRA D0027-004-009-008-001-BB028724
• Item
• 1962

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 (50), West of Spire Rock, Montana, 1962

• US WaBuPNRA D0027-004-009-008-001-BB028725
• Item
• 1962

Part of Timothy Miller Collection