Historical information
Port of Portland Authority Archives
Physical description
Black and white photo of two men on a platform at foot of cliff face at Blacknose Quarry. Several large drums on platform, drilling equipment
Inscriptions & markings
Front: 'DRILLING BLAST HOLES AT BLACKNOSE QUARRY MINERAL DRILLERS' E100 MACHINE 5.11.52 ' - printed on bottom frame
Back: Purple PHT stamp