After several attempts to negotiate a solution failed, a neutral third party-the Taiwan Professional Geotechnical Engineers Association-was called upon to arbitrate. The TPGEA's conclusion was that the cause of the landslide was "natural disaster."
雙方爭執不下，修復工程因此延宕，幾經協調，最後委由公正的第三單位、台灣省大地工程技師公會進行災害原因鑑定，結果認定屬於天然災害。