ProjectKaimai Tunnel rail slab re-level innovationJonathan WhittakerFebruary 13, 2019August 17, 2022 by Jonathan WhittakerFebruary 13, 2019August 17, 2022 Ground engineering and asset preservation specialist Mainmark filled voids and lifted the slab and re-levelled the railway line in the Kaimai Tunnel. The Kaimai Tunnel...