Three people were injured in three accidents that involved eight vehicles within a half-hour period around noon Monday.

The first accident occurred at 11:45 a.m. south of Point of the Mountain when Lino Arrida, 23, Mapleton, lost control of his vehicle during a snowstorm and left northbound I-15, going about 150 feet over the right embankment. He and his pregnant wife, Guadulupe, 19, suffered facial and head injuries. They were taken to American Fork Hospital.Guadulupe Arrida was in stable condition Tuesday morning. Her husband was treated and released.

Utah Highway Patrol Trooper Dennis Shields was investigating the first accident when the second occurred a few yards away, 15 minutes later.

"Two vehicles were going north up the hill. The first spun into the median, then back onto the road. The second was going 60 mph, too fast for the weather conditions, and could not swerve to avoid hitting the first car."

Shields said the man driving the first car, Sharmon Crye, 23, Paradise, Cache County, was wearing a seat belt and was unhurt. The second driver, Jim D. Smith, 28, Provo, was not wearing a seat belt and suffered cuts and bruises. He shared an ambulance with the victims of the first accident and was treated and released from American Fork Hospital.

Shields said the third accident, a few yards away at 12:15 p.m., was "really spectacular." A northbound pickup spun, blocking its lane. A northbound stake truck tried to avoid hitting it by crossing the median and heading north in a southbound lane. A southbound pickup struck the stake truck. That pickup then was struck by a semitrailer truck heading south. The semi jackknifed into the median and was struck by a second semitrailer truck.

The back of the first semi rolled onto its side in the median.

This semitrailer truck jackknifed during what one trooper described as a "spectacular" accident Monday near Lehi.

said he knew of no injuries from the third accident.

And there were "a few more fender benders caused by rubberneckers trying to see what had happened," he said, and one truck had been carrying a box of nails, which spilled over the roadway and caused more damage.

"The guy in the second pickup was wearing a seat belt, and it was probably the only thing that saved his bacon," Shields said.

In another weather-related accident Monday in Provo, a Spanish Fork man was injured in a head-on collision with a semitrailer truck at University Avenue I-15 interchange.

At 3:35 p.m., a car driven by Blake Scott, 36, Spanish Fork, slid on ice on the southbound off-ramp, Highway Patrol Trooper Dave Guest said.

"In that location, the off-ramp and on-ramp are side by side," Guest said. "The car slid onto the on-ramp and hit the semi head on."

Scott was treated for a broken femur and ribs at Utah Valley Regional Medical Center. He was in stable condition Tuesday morning.

The truck driver, Thomas E. Brown, 55, Taylorsville, was uninjured.