Meeting the Challenge of Replacing an Old Penstock

摘要

When the 65-year-old wood stave penstock of the 10.4-MW Pinnacles project in Virginia began leaking, owner Danville Power & Light decided to remove the structure and replace it with steel pipe. The penstock was built on a narrow bench cut into the side of a steep gorge, making access difficult. The owner used a helicopter to retrieve sections of the old penstock and deliver the new epoxy-lined steel pipe.