February Dinner Meeting 2024

202415feb6:00 pmFebruary Dinner Meeting 2024

Event Details

ASCE / GI Joint Dinner Meeting – Feb 2024

Thursday, Feb 15, 2023, 6-8:30pm, Art Marble, Seattle, WA

Topic: Battling the Elements at Elevation 11,160 feet
Speaker: Ty Jahn, Condon Johnson & Associates

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This presentation discusses the challenges we encountered in design and construction of micro-piles and tiebacks at 11,160 feet on the summit of Lone Peak Mountain in Big Sky, MT. Condon-Johnson and Associates, Inc. (CJA) was hired to design and build the foundation system of the new ski tram structure soon to become the flagship of the most technologically advanced lift system in North America.

At this elevation, the ground is permanently frozen and is covered in snow during 10 months of the year. Storms roll in with little to no warning, and the oxygen levels are less than 14% (versus 21% at sea-level). There are no roads to top of the mountain, and all access is provided via helicopters.

CJA had to come up with innovative solutions to excavate over 2000 yards of rock, remove massive amount of snow, and tackle logistical issues of transporting drill rigs, equipment and material to top of the mountain. CJA was able to install over 40 heavy duty micro-piles and tiebacks – embedded into the frozen ground – that will support the future structures against over-turning, rotation and sliding off the mountain.

Meeting Schedule

6:00 Check-in & Networking
6:15 Introduction & Announcements
6:30 Dinner and Networking
7:15 Presentation


Art Marble 21, 731 Westlake Ave N, Seattle, WA 98109



February 15, 2024 6:00 pm(GMT-07:00)


Art Marble 21

731 Westlake Ave N, Seattle, WA 98109

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