Koznitsa (tunnel)
Koznitsa (Bulgarian: Козница [ˈkɔznit͡sɐ]) 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 Sofia–Karlovo 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.
| Overview | |
|---|---|
| Line | Sofia–Karlovo |
| Operation | |
| Constructed | 1949–1951 |
| Opened | June 6, 1951 |
| Owner | National Railway Infrastructure Company |
| Technical | |
| Length | 5,808.5 m |
| No. of tracks | single track |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) (standard gauge) |
| Electrified | 25 kV |
| Highest elevation | 818 m |
| Lowest elevation | 798 m |
| Grade | 2.0‰ / 6.4‰ |
| Route map | |
  Koznitsa (tunnel) (Bulgaria) | |
References
- Рулев, Димитър; Марков, Минчо (2007). Електрифицираните железници на България, т. 1 (1903-1995) (in Bulgarian). София. p. 276.
- Деянов, Димитър (2005). Железопътната мрежа в България 1866-1975 (in Bulgarian). София: изд. "Булхаус" Стара Загора. p. 224. ISBN 954-9364-05-4.
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