Dates: May 2018 – October 2018
Location: 79th Avenue and Union Hills Dr. under Loop 101 to West Beardsley Road in Glendale, AZ
Owner: The City of Glendale
Contractor: Achen Gardner Construction LLC.
Description: Completed a 396-foot long hand tunnel under Arizona State Route 101
Challenges: ADOT road and bridge construction specifications required the bore length extend outside the freeway right-of-way. Poor soil full of cobbles, boulders, and debris was challenging to excavate. Monsoon rains caused a 1-day delay.
Method: Hand Tunneling
Results: Waterline was installed successfully all work was completed on schedule.