December 2023
Photo: WYDOT Geology
Geology Program
Vol. 51, Iss. 12
From left: Former geology staff members Jared Nuhn, Jim Whetstone, and Don Legerski getting muddy as they drill on the Quarantine Slide – QS for short – on Togwotee Pass. WYDOT geologists name nearly all landslides in Wyoming.
Meet WYDOT’s “rock stars”
By Mark Horan and Jordan Young A road is only as good as the ground it’s built on. Fortunately, the staff in the Wyoming Department of Transportation’s Geology Program are true foundation experts. WYDOT’s Geology program, consisting of about 21 individuals when fully staffed, provides geotechnical services to other WYDOT programs, including Bridge, Materials and Project Development. Although it’s a subprogram of Engineering and Planning, Geology also frequently helps Construction, the Districts and other operational staff as they encounter issues with soil or rock during
projects. Mark Falk, chief geologist and Geology program manager, explained that while the program is based in Cheyenne, “there’s only so much geology you can do in an office.” “Our field crews are out 45-plus weeks a year, and our field geologists average probably around 30 percent of their time in the field,” Falk said. “In my opinion, everything that we do begins in the field.” He added the “heart of our field collection” is the drill crews, who spend the majority of the year traveling around the state – no matter the weather – to drill holes and collect information via soil samples. In fact, Falk started with
WYDOT 38 years ago as an intern with a drilling crew. Drilling involves specialized equipment, including truck-mounted drills that can drill up to 150 feet into the earth, although drilling is typically done to about 50-60 feet. Geology recently received a grant to add technology to the drill that helps measure torque, down pressure and penetration rate, among other data points. Falk explained that the technology has been used in oil fields for many years but was recently adapted for soil testing, and other states have seen great success with it. “The hope is someday, if we get enough data collected through this equipGeology continued on page 3