Effluent Outfall Tunnel

Effluent Outfall Tunnel


The effluent outfall tunnel project involved 9.5 miles of TBM mining beneath the Atlantic Ocean and through Cambridge Argillite. Precast tunnel segments were used for initial and final support.

Deere & Ault Consultants, Inc. staff helped the construction management team and had an active role in all aspects of< the work including mining, contact grouting, cut off grouting, drill & blasting, precasting of the segments, shaft lining, and surface works.

Deere & Ault’s staff was also involved in assessing the impact of ground water inflows on mining in general and specifically the effects on the contact grouting program.

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