Montague Tube Rehabilitation in the Borough of Manhattan and Brooklyn (2014)

Project Description

NOH2O® was proposed and accepted as an “or equal” product for the contracted leak mitigation program which included traditional leak mitigation and crack repair services. The Montague Tunnel, approximately 12,000 LF, includes reaches of cast-in-place liner and reaches of cast iron segments with an inner cast-in-place concrete protective lining. Reaches of cast-in-place liner were drilled with holes through the tunnel concrete liner to the surrounding rock, which were then injected with NOH2O® grout. Leaks in the cast iron segments were addressed by replacing standard bolts from the cast iron segments with patented injectable bolts. These bolts were injected with NOH2O® grout to seal the bolts and segment joints. The dryness criteria were achieved.