Ship Propellers and Workers

1536 × 1205

Miners at work underground

1300 × 854

Workers on the Brooklyn Bridge

1280 × 1140

Miners in a Tunnel

1217 × 1110

Bridge Construction Site — Black

3712 × 2656

Historic mountain town view

2400 × 1881

Miners in a coal mine

976 × 764

Blackhall Colliery 1935

1233 × 870

Blackhall Colliery from North

1456 × 960

Steam Locomotive with Workers

2768 × 2176

Miners in Tunnel — Gray

1920 × 1278

Workers on Steel Beam — Black, Dramatic, Afternoon

3000 × 2400