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The roof work is a little confusing in this picture. To the left is the new roof which has two peaks. To the right is the old roof with one peak which has been uncovered for dismantling.
The build date on the gondolas appears to be September, 1911. The Ralston Co. received almost all of its supplies by railroad cars such as these. The B&O RR/PRR main line is in the foreground. The camera is pointing northeast.