You are the owner of this article.

Jackson Hole, WY News

featured top story

Slicing ice

Annual opening of park road is slow going, partly due to a creaky old rotary plow.

Spring plowing of the Teton Park Road

Adam Mates refuses to guess how many more days of plowing are ahead before the tall task of clearing Teton Park Road is complete.

“I’m not doing it,” Mates says. “It’s bad luck.”

Perched 8 feet high in the 45-year-old cab of an Idaho Norland 1800 rotary plow, he’s been inching along all day, slowly slinging a winter’s worth of compacted snow and ice some 40 or 50 feet into the snowed-over sagebrush flats east of Jenny Lake.

Mates’ hesitation to take a stab at how long it’ll be until the finish line perhaps stems from experience — he doesn’t want to jinx it. The Grand Teton National Park motor vehicle operator has 13 years of plowing in the park under his belt, and he knows well that mechanical hiccups are easy to come by.

“She’s a good girl,” Mates says, “But for as burly as they are, they’re pretty fragile.”

Just about every year — and sometimes several times annually — the 1974 riding snowblower breaks down. The machine is essentially a push-style “two-stage snowthrower on steroids,” Mates says, and it has a lot of old, finicky and hard-to-find moving parts. Late last fall the rotary ate a piece of firewood. That was good for a $15,000 repair.

Spring plowing of the Teton Park Road

Mates works the controls for the rotary plow. Teton park purchased the plow new in 1974 and has put almost 35,000 miles on the machine in the last 45 years.

Mates’ typical day of plowing Teton Park Road, an annual Jackson Hole rite of spring, starts around 4 a.m. Fourteen miles of the primary interior park road between the Bradley-Taggart trailhead and Signal Mountain function as groomed trail all winter but usually transition back to pavement around the beginning of April. There’s a weeks-long stretch each spring when it’s a cyclist- and pedestrian-only route, and then on May 1 the gates come up, and it’s a normal road again.

Enabling the winter-to-spring transition with a rotary plow is a solo endeavor, although overall it’s a team effort. As Mates presses north from the Moose side, a colleague rips through the snowpack pointed south from Signal. The intensity and duration of the job depends largely on the winter.

After historically mild conditions at low elevations last winter, the two Teton park plow crews cleared the 7 1/2 miles to the halfway point at the North Jenny Lake turnout in just two days.

This winter the going has been decidedly slower. Plowing around 16 hours a day — broken into two shifts, with two drivers — the Norland rotary had made about 5 miles of progress between Monday and late Thursday morning. Roughly, that pencils out to just 0.1 miles an hour. Aboard the big rig, it’s obvious why the going is so slow — there’s a 40-foot-wide, chest-high snowpack that’s so hard a kicked boot just bounces off the endless pile of frozen precipitation.

“Your guess is as good as mine,” Mates says of the plow’s speed. “I think a turtle could pass us up.”

Speeding the machine up isn’t an option.

“We go so slow so we don’t go tearing everything up,” he says.

By “everything” he means the plow and its gears and bolts — not the snow it’s throwing.

Grand Teton National Park’s heavy equipment mechanic, Steve LaRosa, guesses that he puts in about four hours of maintenance for every 10 hours the Idaho Norland is in operation. He’s far from bitter about it; it’s a somewhat normal level of upkeep of heavy equipment in snow country, he says.

“It’s inherent to the job,” LaRosa says. “It’s the cost of doing business, and we understand that.”

The park’s overall fleet of snow removal machinery amounts to three rotary plows, five “loaders” that can double as blade plows, seven dump trucks and two graders.

“This year was light,” LaRosa says. “We had one truck that had a major breakdown and that was it.”

Smaller breakdowns are more commonplace. The Moose shop’s other Norland rotary plow, for instance, was down for the count Thursday with a broken starter.

The National Park Service has work orders in to replace some of the aging equipment, but at this time there are no such plans for the Idaho Norland snowblower Mates spends his days driving. The custom-built rig has already been remade twice back at the manufacturer’s shop in Burley, Idaho, once in 2000 and again in 2008.

Over its lifetime it has accrued almost 34,515 miles, all here in Grand Teton National Park.

Spring plowing of the Teton Park Road

A sign reflected in the plow’s rearview mirror shows the snow depth near South Jenny Lake in Grand Teton National Park, currently about 3 feet.

Just before noon Mates meets up with his counterpart, Dale Leslie, who drives out to the edge of the plowing progress at the South Jenny Lake turnout to take over the pilot seat of the plow. Leslie will plow until past sundown. During the handoff the truck’s 350-gallon diesel tank gets a top-off. The fuel consumption varies depending on the snowpack, but it goes through around 160 gallons a day on average, Leslie says.

A day of snowblowing Teton Park Road is not nearly as mindless as you would guess.

Markers protrude through the snow delineating the road shoulders, but the plow drivers have to constantly readjust to keep on a straight trajectory. Ice in the snowpack tends to pull the rotary slowly to the side, producing cuts that are more like long, shallow arcs than straight lines. As a result, Mates’ head is constantly on a swivel, checking his mirrors and line and listening attentively for hiccups in the rumble of the plow.

Podcasts or even the radio have no part in the daily routine.

“I listen to the machine,” Mates says. “You’ve got to listen to it, because it’ll tell you if something is wrong.”

Contact Mike Koshmrl at 732-7067 or

Mike has reported on the Greater Yellowstone Ecosystem's wildlife, wildlands and the agencies that manage them since 2012. A native Minnesotan, he arrived in the West to study environmental journalism at the University of Colorado.

(0) comments

Welcome to the discussion.

Please note: Online comments may also run in our print publications.
Keep it clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
Please turn off your CAPS LOCK.
No personal attacks. Discuss issues & opinions rather than denigrating someone with an opposing view.
No political attacks. Refrain from using negative slang when identifying political parties.
Be truthful. Don’t knowingly lie about anyone or anything.
Be proactive. Use the “Report” link on each comment to let us know of abusive posts.
Share with us. We’d love to hear eyewitness accounts or history behind an article.
Use your real name: Anonymous commenting is not allowed.

Get up-to-the-minute news sent straight to your device.


Developing and Breaking News



Today In Jackson