Permanent opening - 500m mole (Mr Langbein's plan)

Year proposed

  1932

Status

  Not implemented

Location description

  Taumutu

Description of option

  A permanent opening consisting of a mole bypassing gravel around the opening was proposed. This design used the Timaru experience as a guide and was designed with the mole extending seaward for 25 chains (500m). Provisions were included for an extension to the mole to be under taken in future if necessary.

Opening, closing, and lake level control description

  Permanent opening.

Maximum discharge

 

Maintenance/Management description

 

Cost description

  1932 cost: 110,000 pounds (using rock from Birdlings Flat run along the spit on a tramway)

Fish passage benefit rating

  Low

Potential running impacts or benefits