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- Black_Rock_Tunnel length "0.5888736".
- Black_Rock_Tunnel abstract "The Black Rock Tunnel is an active rail road tunnel of the old Reading Railroad. The 1835 tunnel was the Third rail tunnel constructed in the United States, and is the Third oldest still in use. The tunnel is also notable as being the first for which shafts were sunk during construction. The tunnel is cut through a hill in Phoenixville, Pennsylvania, USA. The tunnel and line are now owned by Norfolk Southern as part of its Harrisburg Line.The Black Rock Tunnel was constructed between 1835 and 1837 and opened in 1838. W. Hasell Wilson was the resident engineer in charge. The tunnel was originally 1,932 feet (589 m) long, 19 feet (5.8 m) wide, and 17 feet (5.2 m) high. The tunnel passes 122 feet (37 m) below the top of the hill. A then-unique feature of the tunnel's construction was the sinking of six, 7-foot (2.1 m) diameter shafts, tangent to the tunnel cross section. These shafts were spaced at 100-foot (30 m) intervals to correct errors in the tunnel alignment. Construction of the tunnel cost an estimated $178,992.Noted local miner, geologist and palaentologist Charles M. Wheatley examined the rock excavated from the tunnel and identified many previously unknown fossilized species, some of which now bear his name.In 1858 and 1859 the Black Rock and Flat Rock Tunnels were widened to accommodate the wider rolling stock from the Lebanon Valley Branch. The spacing between the tracks was increased from 4 feet (1.2 m) to 6 feet (1.8 m). The widening of the tunnel was the first project to employ electric detonation of multiple explosive charges.The northern end of the tunnel is high on a steep bank of the Schuylkill River so the rail line makes a dramatic transition from tunnel to bridge. The ends of the Black Rock Tunnel are located at 40°08′51″N 75°31′06″W and 40°08′39″N 75°30′46.5″W.".
- Black_Rock_Tunnel buildingEndYear "1837".
- Black_Rock_Tunnel buildingStartYear "1835".
- Black_Rock_Tunnel height "5.1816".
- Black_Rock_Tunnel length "588.8736".
- Black_Rock_Tunnel location Phoenixville,_Pennsylvania.
- Black_Rock_Tunnel openingYear "1838".
- Black_Rock_Tunnel status "Active".
- Black_Rock_Tunnel thumbnail Black_Rock_Tunnel_HAER_PA-520-1.jpg?width=300.
- Black_Rock_Tunnel wikiPageExternalLink dgkeysearchdetail.cfm?trg=1&strucID=662032&imageID=G91F310_012F.
- Black_Rock_Tunnel wikiPageExternalLink showphotos.php?location=Black%20Rock%20Tunnel%20-%20NS%20Harrisburg%20Line.
- Black_Rock_Tunnel wikiPageID "24998646".
- Black_Rock_Tunnel wikiPageRevisionID "600760369".
- Black_Rock_Tunnel yearOfConstruction "1835".
- Black_Rock_Tunnel caption "East end of tunnel, looking NW".
- Black_Rock_Tunnel character "Freight".
- Black_Rock_Tunnel construction "1835".
- Black_Rock_Tunnel hasPhotoCollection Black_Rock_Tunnel.
- Black_Rock_Tunnel id "pa3726".
- Black_Rock_Tunnel location Phoenixville,_Pennsylvania.
- Black_Rock_Tunnel name "Black Rock Tunnel".
- Black_Rock_Tunnel notrack "Now Single".
- Black_Rock_Tunnel notrack "Originally Double".
- Black_Rock_Tunnel open "1838".
- Black_Rock_Tunnel status "Active".
- Black_Rock_Tunnel survey "PA-520".
- Black_Rock_Tunnel system "Now Norfolk Southern".
- Black_Rock_Tunnel system "Originally Reading Railroad".
- Black_Rock_Tunnel title "Philadelphia & Reading Railroad, Black Rock Tunnel".
- Black_Rock_Tunnel subject Category:Buildings_and_structures_in_Chester_County,_Pennsylvania.
- Black_Rock_Tunnel subject Category:Historic_American_Engineering_Record_in_Pennsylvania.
- Black_Rock_Tunnel subject Category:Norfolk_Southern_Railway_tunnels.
- Black_Rock_Tunnel subject Category:Railroad_tunnels_in_Pennsylvania.
- Black_Rock_Tunnel subject Category:Reading_Railroad_tunnels.
- Black_Rock_Tunnel subject Category:Transportation_in_Chester_County,_Pennsylvania.
- Black_Rock_Tunnel point "40.145833333333336 -75.51555555555555".
- Black_Rock_Tunnel type Artifact100021939.
- Black_Rock_Tunnel type Bridge102898711.
- Black_Rock_Tunnel type NorfolkSouthernRailwayBridgesAndTunnels.
- Black_Rock_Tunnel type Object100002684.
- Black_Rock_Tunnel type Passage103895293.
- Black_Rock_Tunnel type Passageway103895585.
- Black_Rock_Tunnel type PhysicalEntity100001930.
- Black_Rock_Tunnel type RailroadTunnel104048441.
- Black_Rock_Tunnel type RailroadTunnelsInPennsylvania.
- Black_Rock_Tunnel type ReadingRailroadBridgesAndTunnels.
- Black_Rock_Tunnel type Structure104341686.
- Black_Rock_Tunnel type Tunnel104497962.
- Black_Rock_Tunnel type Way104564698.
- Black_Rock_Tunnel type Whole100003553.
- Black_Rock_Tunnel type YagoGeoEntity.
- Black_Rock_Tunnel type YagoPermanentlyLocatedEntity.
- Black_Rock_Tunnel type ArchitecturalStructure.
- Black_Rock_Tunnel type Infrastructure.
- Black_Rock_Tunnel type Place.
- Black_Rock_Tunnel type RailwayTunnel.
- Black_Rock_Tunnel type RouteOfTransportation.
- Black_Rock_Tunnel type Wikidata:Q532.
- Black_Rock_Tunnel type Place.
- Black_Rock_Tunnel type Location.
- Black_Rock_Tunnel type _Feature.
- Black_Rock_Tunnel type SpatialThing.
- Black_Rock_Tunnel comment "The Black Rock Tunnel is an active rail road tunnel of the old Reading Railroad. The 1835 tunnel was the Third rail tunnel constructed in the United States, and is the Third oldest still in use. The tunnel is also notable as being the first for which shafts were sunk during construction. The tunnel is cut through a hill in Phoenixville, Pennsylvania, USA.".
- Black_Rock_Tunnel label "Black Rock Tunnel".
- Black_Rock_Tunnel sameAs m.09gc2g6.
- Black_Rock_Tunnel sameAs 7146923.
- Black_Rock_Tunnel sameAs Q4921739.
- Black_Rock_Tunnel sameAs Q4921739.
- Black_Rock_Tunnel sameAs Black_Rock_Tunnel.
- Black_Rock_Tunnel lat "40.145833333333336".
- Black_Rock_Tunnel long "-75.51555555555555".
- Black_Rock_Tunnel wasDerivedFrom Black_Rock_Tunnel?oldid=600760369.
- Black_Rock_Tunnel depiction Black_Rock_Tunnel_HAER_PA-520-1.jpg.
- Black_Rock_Tunnel isPrimaryTopicOf Black_Rock_Tunnel.
- Black_Rock_Tunnel name "Black Rock Tunnel".