Ralph A. Petersen Tunnel

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1958  Wikimedia, Wikidata
Knowles Creek Tunnel; Mapleton Tunnel
road tunnel, United States, 

• Oregon Historic Sites Database page^@
​ ​ ​

Location: 44.0117, -123.7671, KML, Cluster Map, Maps,
1 places

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• 

  Ralph A. Petersen Tunnel ⓘ
  

1958-01-01T00:00:00Z

1958-01-01T00:00:00Z

1958 Ralph A. Petersen Tunnel

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Type	Subtype	Date	Description	Notes	Source
link	page		Oregon Historic Sites Database page@		Wikidata
site	tunnel	1958	Ralph A. Petersen Tunnel	road tunnel	Wikidata