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Tunnels
US WaBuPNRA D0027-007-009-008-008 · Subseries Level 3 · undated
Part of Timothy Miller Collection

Engineering drawings of structurse designed to allow passage of trains underground.

Tunnels
US WaBuPNRA D0027-004-009-008-008 · Subseries Level 3 · 1890-1914
Part of Timothy Miller Collection

Engineering drawings of structures designed to allow passage of trains underground.

Tunnels
US WaBuPNRA D0027-003-009-008-008 · Subseries Level 3 · 1948-1980
Part of Timothy Miller Collection

Engineering drawings of structures designed to allow passage of trains underground.

Tunnels
US WaBuPNRA D0027-001-009-008-008 · Subseries Level 3 · undated
Part of Timothy Miller Collection

Engineering drawings of structures designed to allow passage of trains underground.

Tunnels
US WaBuPNRA D0027-010-009-008-008 · Subseries Level 3 · undated
Part of Timothy Miller Collection

Engineering drawings of structures designed to allow passage of trains underground.