SIOUX FALLS, S.D. (AP) — When Jim Hansen boarded his company’s single-engine aircraft for a pheasant-hunting trip to South Dakota, he brought along the same people he trusted with his business: his family.

Three generations of Hansen’s clan ran a petroleum distribution business in Idaho Falls, Idaho, called Conrad & Bischoff. Hansen’s sons, Jim Jr. and Kirk, had started in the company making deliveries and now oversaw operations across several states, in addition to their own endeavors that included a health products company. And Hansen’s grandchildren worked in management.

The family headed back to Idaho on Saturday, but their plane crashed about a mile after takeoff from the Chamberlain airport, nine family members — from Hansen to his great-grandson Houston — died. They left behind burgeoning businesses that reached across several Western states.

Those killed were Jim Hansen Sr.; his sons, Jim Jr. and Kirk Hansen; Kirk Hansen’s children Stockton and Logan; Kirk Hansen’s sons-in-law, Kyle Naylor and Tyson Dennert; and Jim Hansen Jr.’s son Jake and grandson Houston were killed.

Kirk’s son Josh, Jim Jr.’s son Matt and Jim Jr.’s son-in-law, Thomas Long, survived and were in stable condition Monday.

Family representative Jeff Walbom called the crash a “total tragedy” and described how their loss rippled through their Idaho community, from church to their businesses.

Kirk and his brother also founded a wellness products marketing company called Kyani in 2007. That business had a charitable arm that built schools in several foreign countries.

The Hansens lived some 800 miles west of Chamberlain in Idaho Falls.

People who knew the Hansens recalled their generosity. Brian Wood, owner of an Idaho Falls funeral home, posted on Facebook about how Kirk and Jim had helped pay funeral expenses for people in need.

When the plane crashed Saturday, the clan was returning home from Thunderstik Lodge, a pheasant-hunting lodge that sits on the bank of the Missouri River just a few miles from Chamberlain’s airport. The outing had been an annual tradition for many years, said Walbom.

The area was under a winter storm warning with snow and cloud cover. Chamberlain City Engineer Greg Powell told The Argus Leader that the airport had issued two notices about ice and snow on the runway.

Federal Aviation Administration spokeswoman Elizabeth Isham Cory said small planes are not usually restricted from taking off during storms and that pilots are “the ultimate authority” for deciding whether to fly.

Federal investigators examined the crash site Monday and will be working throughout the week. National Transportation Safety Board spokesman Peter Knudson said no cause has been determined and that investigators would be reviewing the weather along with other factors.