Manapouri Second Tailrace Tunnel

Manapouri Second Tailrace Tunnel

Manapouri, New Zealand

The Manapouri second tailrace tunnel project consists of a six mile, 33 foot diameter tunnel through hard rock.

The contractor had difficulties with penetration rate and utilization of the TBM due to unexpected rock conditions.

Deere & Ault Consultants, Inc. was contracted by the owner to develop a comprehensive rock sampling and laboratory testing program in order to evaluate the actual conditions being encountered.

Deere & Ault’s staff presentation of the rock properties was instrumental in reaching a favorable settlement for the owner.

Client:  Meridian Energy Limited

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