American Fork, Utah

Civil and Structural engineering services for the Rehabilitation of the Last Chance historic restroom to provide additional sanitary treatment capacity and protect natural and cultural resources. Civil design included grading, erosion control, 600 LF of 6-inch sanitary main, a macerator for shredding foreign objects deposited into the vault and redundant incinerators for the sanitary waste. State of Utah DEQ permitting included decommissioning the existing lower vault as well as new treatment and incinerator exhaust. Unique features include the geological significance of the site, avalanche areas and very limited access to the site. The site is only accessible by foot or mule on an established, steep, and narrow trail (or by helicopter) such that heavy equipment is not able to be driven to the project site. Special consideration was given to winterization of system but allowance for four-season operation, steep slopes, rock excavation, access to the site, preservation of historic elements, automation between the upper vault and incinerator, operation of the system during non-visitor hours, and logistics of construction materials and equipment.