Tender For sw-i:aden/sklr sub division : rehabilitation of unlined portion of tunnel no.31 at km.77/100-600 between ydk-svgl station and tunnel no.51 at km.88/100-400 between svgl-sbhr station by method of scaling, rock bolting, shotcrete, wire mesh, rrs, grouting & drainage.sw-ii:aden/sklr sub division : rehabilitation of unlined portion of tunnel no.51 at km.88/100-400 between svgl-sbhr station by method of scaling, rock bolting, shotcrete, wire mesh, rrs, grouting & drainage.