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

• US WaBuPNRA D0027-004-009-008-001-BB028484
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 4, Bridge 51 (50), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028732
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 4, Bridge 51 (50), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028731
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 5, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB025700
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 6, Bridge 51 (50), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028733
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 6, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB025702
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 6, Bridge 52 (54), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB025701
• Item
• undated

Part of Timothy Miller Collection

Northern Pacific Engineering Drawing: Detail of Bent 7, Bridge 51 (50), West of Spire Rock, Montana, undated

• US WaBuPNRA D0027-004-009-008-001-BB028734
• Item
• undated

Part of Timothy Miller Collection