Born-Digital or AnalogAnalogTranscripttunnels Cowenhoven tunnel. Arkell, ASPEN, PITKIN COUNTY C622.9788 A721as p.9 Plan for a 15 mile tunnel through the Continental Divide, 1911. Mi-Co Clear Creek am mining collection Description of mining tunnels in Colorado. Wonderland Quarterly v.14 #1 Ja 1904 Entire issue Leadville drainage tunnel to be finished today. RMN F 26, 1952 p.14 Description. Colorado Miner Ag 4, 1877 p.3CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
