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Describes this district, giving its history, geology, and describing the more prominent mines and prospects. (8000 w.) (No. 19991 C)
Describes this district, giving its history, geology, and describing the more prominent mines and prospects. (8000 w.) (No. 19991 C)
Portland canal
B C Min Rec
Emmens, Newton W. (author)
1910
Ills.
Article (Journal)
English
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Portland canal mining division
Engineering Index Backfile | 1911
Portable concrete plant builds Louisville and Portland canal wall
Engineering Index Backfile | 1916
Notes on a crosscut adit driven by the Portland Canal Tunnels, Limited
Engineering Index Backfile | 1915
|Portland International Airport, Portland, Oregon
British Library Online Contents | 2002
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