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- Blue_Ridge_Parkway_tunnels abstract "Blue Ridge Parkway tunnels consist of a total of 26 vehicle tunnels constructed along the 469 miles (755 km) of the Blue Ridge Parkway. One, the Bluff Mountain Tunnel, is in Virginia and twenty-five are in North Carolina.The design standards specified a minimum impact on the land. The vehicle tunnels were often constructed to reduce excessive landscape scarring that open cuts would have produced. They are used in areas of steep terrain where ridges run perpendicular to the roadway alignment. North Carolina's more rugged terrain required the majority of the tunnels. Most of the work on the tunnel digging was done by hand and provided by the Civilian Conservation Corps in the 1930s. Little machinery was used with the intention of creating manual labor in depressed economic times. They did have for tunneling truck-mounted water-cooled compressed air drills called "Jumbos." After the initial holes were drilled into the substrata, dynamite was used for blasting away the rock.Concrete lining was done during construction due to tunnel cave-ins. This concrete lining was first used in the Devil's Courthouse Tunnel. It was later discovered that it enhanced the interior lighting within the tunnel itself. Where done the lining covered about a quarter of the interior structure. An additional benefit was the elimination of moisture entering the tunnel. Moisture in the winter caused ice problems.The Pine Mountain Tunnel is the longest on the Parkway at 1,434 feet (437 m). Ferrin Knob Tunnel #1 is the first and longest of the triplet tunnels. The local people once referred to ferns as "ferrins." Ferrin Knob Tunnel #2 is located at milepost 401.3 and Ferrin Knob Tunnel #3 is located at milepost 401.5. The distinctive stone masonry portals now on the parkway tunnels were generally not part of the original construction of the 1930s. They were added later.The tunnels are listed below by milepost, name, and length. The maximum height is in the center of the tunnel and the minimum height is at the edge stripe.".
- Blue_Ridge_Parkway_tunnels thumbnail Bluff_Mountain_Tunnel.jpg?width=300.
- Blue_Ridge_Parkway_tunnels wikiPageExternalLink maps?ll=35.853475,-82.096963&z=9&t=h&hl=en.
- Blue_Ridge_Parkway_tunnels wikiPageID "16177885".
- Blue_Ridge_Parkway_tunnels wikiPageRevisionID "501167305".
- Blue_Ridge_Parkway_tunnels hasPhotoCollection Blue_Ridge_Parkway_tunnels.
- Blue_Ridge_Parkway_tunnels subject Category:Blue_Ridge_Parkway.
- Blue_Ridge_Parkway_tunnels subject Category:Civilian_Conservation_Corps_in_North_Carolina.
- Blue_Ridge_Parkway_tunnels subject Category:Civilian_Conservation_Corps_in_Virginia.
- Blue_Ridge_Parkway_tunnels subject Category:Landmarks_in_North_Carolina.
- Blue_Ridge_Parkway_tunnels subject Category:Landmarks_in_Virginia.
- Blue_Ridge_Parkway_tunnels subject Category:Transportation_in_North_Carolina.
- Blue_Ridge_Parkway_tunnels subject Category:Tunnels_in_North_Carolina.
- Blue_Ridge_Parkway_tunnels subject Category:Tunnels_in_Virginia.
- Blue_Ridge_Parkway_tunnels subject Category:Works_Progress_Administration_in_North_Carolina.
- Blue_Ridge_Parkway_tunnels subject Category:Works_Progress_Administration_in_Virginia.
- Blue_Ridge_Parkway_tunnels point "35.85348 -82.09696".
- Blue_Ridge_Parkway_tunnels type Artifact100021939.
- Blue_Ridge_Parkway_tunnels type Landmark108624891.
- Blue_Ridge_Parkway_tunnels type LandmarksInNorthCarolina.
- Blue_Ridge_Parkway_tunnels type LandmarksInVirginia.
- Blue_Ridge_Parkway_tunnels type Location100027167.
- Blue_Ridge_Parkway_tunnels type Object100002684.
- Blue_Ridge_Parkway_tunnels type Passage103895293.
- Blue_Ridge_Parkway_tunnels type Passageway103895585.
- Blue_Ridge_Parkway_tunnels type PhysicalEntity100001930.
- Blue_Ridge_Parkway_tunnels type Point108620061.
- Blue_Ridge_Parkway_tunnels type Position108621598.
- Blue_Ridge_Parkway_tunnels type Tunnel104497962.
- Blue_Ridge_Parkway_tunnels type TunnelsInNorthCarolina.
- Blue_Ridge_Parkway_tunnels type TunnelsInVirginia.
- Blue_Ridge_Parkway_tunnels type Way104564698.
- Blue_Ridge_Parkway_tunnels type Whole100003553.
- Blue_Ridge_Parkway_tunnels type YagoGeoEntity.
- Blue_Ridge_Parkway_tunnels type YagoLegalActorGeo.
- Blue_Ridge_Parkway_tunnels type YagoPermanentlyLocatedEntity.
- Blue_Ridge_Parkway_tunnels type SpatialThing.
- Blue_Ridge_Parkway_tunnels comment "Blue Ridge Parkway tunnels consist of a total of 26 vehicle tunnels constructed along the 469 miles (755 km) of the Blue Ridge Parkway. One, the Bluff Mountain Tunnel, is in Virginia and twenty-five are in North Carolina.The design standards specified a minimum impact on the land. The vehicle tunnels were often constructed to reduce excessive landscape scarring that open cuts would have produced. They are used in areas of steep terrain where ridges run perpendicular to the roadway alignment.".
- Blue_Ridge_Parkway_tunnels label "Blue Ridge Parkway tunnels".
- Blue_Ridge_Parkway_tunnels sameAs m.03wc0db.
- Blue_Ridge_Parkway_tunnels sameAs Q4929730.
- Blue_Ridge_Parkway_tunnels sameAs Q4929730.
- Blue_Ridge_Parkway_tunnels sameAs Blue_Ridge_Parkway_tunnels.
- Blue_Ridge_Parkway_tunnels lat "35.85348".
- Blue_Ridge_Parkway_tunnels long "-82.09696".
- Blue_Ridge_Parkway_tunnels wasDerivedFrom Blue_Ridge_Parkway_tunnels?oldid=501167305.
- Blue_Ridge_Parkway_tunnels depiction Bluff_Mountain_Tunnel.jpg.
- Blue_Ridge_Parkway_tunnels isPrimaryTopicOf Blue_Ridge_Parkway_tunnels.