The tunnel is located on the stretch Dzhekta-Krol direction Abakan — Sayan Krasnoyarsk Railway.
Old Krolsky tunnel has been traced as far back as 1965. With the commissioning of the new Krolsky old tunnel will be closed for reconstruction.
In addition, after entering the new Krolsky tunnel into operation stage Dzhetka — Krol was double-track, which will increase the capacity of the line.
In the construction of a new tunnel of "Russian Railways" has invested 7.5 billion rubles.
Start of construction — 2004, completion of construction — 2011
The tunnel — 2253.6 m
New Krolsky became Russia’s first railway tunnel excavation which is a mechanized tunnel boring complex.