MetroLink (St. Louis, MO)

MetroLink (St. Louis, MO)

Metrolink, the highly used light rail system in St. Louis, experienced a major expansion that included a mile long underground tunnel. To assure that the tunnels maintained a dry environment, CETCO Swelltite was used on the precast tunnel roof panels while VOTLEX DS was selected for property line and below slab applications. The Voltex DS utilizes a HDPE liner, attached to the geotextile bentonite, which offers additional protection against methane and radon gases. This was deemed necessary since the tunnels are commonly occupied by Metrolink users and personnel.