The Ministry of Transportation petitioned for drainage works to alleviate flooding on Highway No. 93.
The engineer apportioned the estimated costs among lands in the watershed, assessing the appellants for outlet liability.
The appellants appealed the assessments, arguing they were too high, questioning the need for the works, and claiming exemptions as riparian owners.
The Tribunal held it lacked jurisdiction to consider the need for the works and found no exemption for riparian owners under the Drainage Act.
However, applying the Todgham assessment method, the Tribunal found the assessments unfair because the engineer used a runoff factor of 1.0 for the appellants' hilly bush lands.
The Tribunal reduced the runoff factor to 0.7, lowering the appellants' assessments and correspondingly increasing the assessment for Highway No. 93, which received the most significant benefit.