Black Rock Tunnel
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, United States.
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 long, wide, and high.
The tunnel passes below the top of the hill.
A then- unique feature of the tunnel's construction was the sinking of six, diameter shafts, tangent to the tunnel cross section.
These shafts were spaced at 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 to.
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 and.
Robert F. Hill
Robert F. Hill( April 14, 1886 – March 18, 1966) was a Canadian film director, screenwriter, and actor during the silent film era.
W. Augustus Barratt
W. Augustus Barratt( 1873- 1947) was a Scottish- born, later American, songwriter and musician.
Light at the End of the Tunnel (disambiguation)
Light at the End of the Tunnel may refer to:
At the End of the Tunnel
At the End of the Tunnel is a 2016 Argentine crime thriller film directed by Rodrigo Grande.
The film won best movie at the Seattle International Film Festival in 2017.
The Tunnel
The Tunnel may refer to:
Dark Stairways
Dark Stairways is a 1924 American silent mystery film directed by Robert F. Hill and starring Herbert Rawlinson, Ruth Dwyer and Hayden Stevenson.
Rodrigo Grande
Rodrigo Grande( born February 10, 1974 in Rosario, Santa Fe Province) is an Argentine film director and screenplay writer.
He works in the cinema of Argentina and in the cinema of Spain.
Tunnel du Bois Clair
The Tunnel du Bois Clair is a tunnel near Cluny, France.
The tunnel is closed during the winter months( mid-October through the end of March) to protect a colony of bats that live in the tunnel.
The tunnel takes about 7 minutes to travel through by bike and around 20 minutes by foot.
Claude Weisz
Claude Weisz is a French film director born in Paris.

Question: Which film has the director born later, Dark Stairways or At The End Of The Tunnel?
Answer: At The End Of The Tunnel