Tasks Performed: Consultant responsible for evaluating the geological conditions and rock support requirements for this project. He made recommendations for excavating and supporting the diversion tunnel using the NATM (New Austrian Tunneling Method).
Duration: 1992 (11 months)
Description: This project consists of a concrete-lined diversion and spillway tunnel which is approximately 762-meters-long and has a 12 meter I.D. circular cross section. Due to the poor quality of the rock which for the most part consisted of fractured limestone and phyllite alternating with limestone, he recommended to pretreat the ground of all four rock classes with spiling reinforcement.