Événement

ASCE / GI Joint Dinner Meeting - February 15, 2024

Co-organized by Geo-Institute and ASCE Seattle

Join us for the February meeting on Thursday, February 15th. Ty Jahn with CJ&A will be presenting the topic "Battling the Elements at Elevation 11,160 feet" from a recent project.

$50 - ASCE Member (Early bird special before 2/6)
$60 - ASCE Member (Late registration)
$60 - Non-member
FREE - Current College Student
FREE - Current College Faculty Member
$100 - Student Sponsorship

Please support our local college students to attend dinner meetings and network with our local practitioners. Your support to our group and students is greatly appreciated.

Online registration will close the day of the meeting, but walk-up registration may be available (depending on space available).

Presenter: Condon-Johnson & Associates, Inc. Ty Jahn, P.E.

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.

Tentative Meeting Agenda

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

Directions & Parking

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

Paid parking is available in nearby lots.