San Francisco Geo-Institute

San Francisco Geo-Institute (SFGI)

For the latest announcements regarding events, dinner meetings, and news, please visit the SFGI LinkedIn Group or sign up for email updates. If you are interested in learning more about SFGI, check out our past events.

About Us

The Geo-Institute (G-I) is a specialty membership organization focused on geo-professionals and the geo-industry. It is one of American Society of Civil Engineers’ eight specialty Institutes. Similarly, SFGI is the local specialty chapter mirroring the goals and purposes of the G-I. The purpose of SFGI is to locally promote an interest in and the general advancement of engineering knowledge in the fields of geotechnical and geoenvironmental engineering, and related earth sciences.

Our geo-professionals work to improve the built environment, prevent the loss of life and property from natural and man-made hazards, and construct sound and reliable engineered facilities and structures.

UPCOMING EVENT

SFGI Dinner Presentation
Thursday, April 18, 2024
5:30 – 8:30 PM PST

Battling the Elements at Elevation 11,160 feet
(Construction of the Big Sky Tram)

by

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

REGITER

$95 – Professionals and Guests
$25 – Students

Abstract:

This presentation discusses the challenges 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.

Location:
Scott’s Seafood Jack London Square
2 Broadway
Oakland, California

The dinner presentation will be held in the Harborview A Room.

When:
Thursday, April 18, 2024
5:30 pm – 6:30 pm: Registration and Social Hour
6:30 pm – 7:15 pm: Dinner
7:15 pm – 8:30 pm: Presentation

REGISTER

**Send us an email at ascesfgeo@gmail.com to get involved!**