Timber outlet structure (1955) - design to prevent sea from filling the outlet channel with shingle.

Year proposed

  1955

Status

  Not implemented

Location description

  Taumutu

Description of option

  An outlet structure to prevent the sea from filling in the outlet channel with shingle.

Opening, closing, and lake level control description

  An outlet structure designed to assist with mechanical opening reliability and reduce effort required to excavate opening.

Maximum discharge

  above 300 cumecs

Maintenance/Management description

 

Cost description

  Construction cost est:

  1955: Timber = 90,000 pounds, or Steel sheet piling return walls = 94,000 pounds

  1969: Timber = 157,500 pounds or $315,000 (Dalmer, 1970).

Fish passage benefit rating

  Low

Potential running impacts or benefits

  Intended to improve mechanical opening reliability and reduce effort required to excavate opening.