John R. Fetcher, who changed the course of history in northwest Colorado by building reservoirs, overseeing local water districts and ushering the Steamboat Ski Resort into the modern age, died late Friday afternoon at Yampa Valley Medical Center. He was 97.

Mr. Fetcher's son, Jay, said his father was admitted to the hospital Monday to be treated for pneumonia.

"He went very peacefully," Jay Fetcher said.

John Fetcher died on the eve of Steamboat Springs' 96th Winter Carnival weekend, less than 24 hours before skiers were scheduled to soar off the jumps at Howel sen. More than 35 years earlier, he had helped to resurrect the historic ski jumps after a fire.

The Harvard-trained engineer learned to ski as a youth in Switzerland.

He and his brother bought a ranch on the Elk River near Clark and moved their families there in 1949.

Mr. Fetcher met Olympic skier Gordy Wren with the Steamboat Springs Winter Sports Club and quickly became involved in a national ski hill engineering panel, where he helped improve the safety of ski-jumping hills.

He earned a place in the Colorado Ski and Snowboard Hall of Fame. However, Mr. Fetcher said in 2008 that the accomplishment he was most proud of was the role he played in building Yamcolo Reservoir in the late 1970s, on the headwaters of the Yampa River.

"Yamcolo was an absolute godsend to the ranchers," Mr. Fetcher said in May 2008. "In 1977, the year of the terrible drought, some of the ranchers in Yampa couldn't take any water out of the river because it wasn't flowing. They didn't put up a single bale of hay and had to sell off their cattle. Since Yamcolo filled, we've had adequate irrigation supplies for all of the ranching community."

He spearheaded the creation of Steamboat Lake on his own ranch, and Stagecoach Reservoir near Oak Creek. Both became popular state parks.

Mr. Fetcher retired from his post as secretary of the Upper Yampa Water Conservancy district on Dec. 31 but continued going to the office three days a week to put his files in order.

He was at his desk as recently as Feb. 2, Jay Fetcher said.