Mechanical opening - 1931 to 1946

Year proposed



  Implemented for a defined period

Location description


Description of option

  The opening of the lake at Taumutu using power scoops operated by winches on crawler tractors.

Opening, closing, and lake level control description

  Between 1913 and 1947 there were an average of 1.6 openings/year to lower lake levels.

Maximum discharge

  above 300 cumecs

Maintenance/Management description


Cost description

  Between 1913 and 1947 the average opening cost was 333+ pounds (Dalmer, 1970).

Fish passage benefit rating


Potential running impacts or benefits

  Aim was to lower lake level to alleviate potential flooding of farmland.