Koznitsa (tunnel)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Line SofiaKarlovo
Constructed 1949–1951
Opened June 6, 1951 (1951-06-06)
Owner National Railway Infrastructure Company
Length 5,808.5 m
No. of tracks single track
Track gauge 1,435 mm (4 ft 8 12 in) (standard gauge)
Electrified 25 kV
Highest elevation 818 m
Lowest elevation 798 m
Grade 2.0‰ / 6.4‰
Route map
Koznitsa (tunnel) is located in Bulgaria
Koznitsa (tunnel)
Koznitsa (tunnel) (Bulgaria)

Koznitsa is a railway tunnel under the Koznitsa ridge in the Stara planina (Balkan Mountains), the longest tunnel in Bulgaria. The tunnel is located between the Bulgarian towns of Koprivshtitsa and Klisura and is 5,808 m long.[1][2] It is the seventh tunnel on the SofiaKarlovo line, starting at the exit of Koprivshtitsa station and ending just before Stryama station. Along its entire length the tunnel is straight and at Koprivshtitsa the lights of the locomotive are visible a long distance into the tunnel.[citation needed]


  1. ^ Рулев, Димитър; Марков, Минчо (2007). Електрифицираните железници на България, т. 1 (1903-1995) (in Bulgarian). София. p. 276. 
  2. ^ Деянов, Димитър (2005). Железопътната мрежа в България 1866-1975 (in Bulgarian). София: изд. „Булхаус“ Стара Загора. p. 224. ISBN 954-9364-05-4. 

Coordinates: 42°41′54″N 24°22′55″E / 42.69833°N 24.38194°E / 42.69833; 24.38194