PITTSBURGH (AP) _ A Massachusetts gravel plant foreman who saved a co-worker from grinding machinery and two Canadian women who confronted a knife-wielding intruder after he slashed their elderly neighbor were among 18 people recognized by the Carnegie Hero Fund Commission.

The annual awards honor people who risked their lives in efforts to save others. Three of those named Thursday died in their attempts.

The commision founded by Pittsburgh industrialist Andrew Carnegie in 1904 has recognized 7,495 Americans and Canadians over the years. More than $18.8 million has been awarded. Winners, or their survivors, get $2,500.

Twenty-four-year-old Michael Radwich of Hinsdale, Mass., said he had little time to think when co-worker Scott Pierce became entangled in a gravel sorter he was repairing on Oct. 18, 1989.

''He was leaning in to see how it was working,'' Radwich said. ''I could see him getting wrapped up in the shaft, getting dragged up.''

''I grabbed for him and yanked him out. He fell back on the deck and I could see his arm was almost off,'' he said.

Pierce's left arm and Radwich's left thumb were nearly severed and had to be reattached.

Also honored were Grace Nolan, 50, of Whitby, Ontario, and Irene Beaton, 67, of Lindsay, Ontario, who challenged a man who broke into the home of a neighbor, Dorothy Blackhall, 72, and slashed her face.

Mrs. Blackhall survived and the attacker was placed in a mental institution, Mrs. Nolan said.

Kenneth L. Yant, Jr., 33, of Plainfield, Ind., was among those who died as a result of their heroics. Yant died Aug. 26, 1989 while trying to rescue an 11-year-old boy from drowning in Martinsville, Ind.

Another award winner who died was John E. Dedon, 42, of Jackson, La., who died trying to save an 8-year-old boy from drowning Aug. 6, 1989. The third was David A. Guillen, 32, was fatally shot Dec. 1, 1989 when he intervened on behalf of a 13-year-old boy being robbed of his bike in Bell, Calif.

Other winners were:

-Daniel D. Sanders, 30, of Washington, Pa., who jumped into a creek and saved a fisherman from drowning Oct. 18, 1989, in Burt, N.Y.

-Curtis C. Dennison, 35, of Irwin, Pa., who carried a woman from a car moments before leaking gas ignited, engulfing the car in flames on Oct. 28, 1989, in Lewisville, Ohio.

-Gerald Heinen, 48, of Loves Park, Ill., who tried to save a 79-year-old woman from a burning car in Ridott, Ill., on Aug. 29, 1989. The off-duty firefighter crawled through the woman's car window and pulled her out. She later died.

-John Joseph Theriault, 29, and Pierre O. Theriault, 35, who rescued a teen-age girl dangling from a tree near the top of a 130-foot cliff in Bathurst, New Brunswick, on March 30, 1989.

-Don W. Rocap, 67, of Lubbock, Texas, who saved two men from a burning car after a crash in Lubbock on Oct. 10, 1989.

-LeRoy Aden, 47, a gas station attendant from Fletcher, N.C., who rescued a state trooper struggling with a driver who pulled a gun in Skyland, N.C., on Feb. 11. Aden grabbed the driver's gun hand and pulled him off the officer.

-Lawrence Ogletree, 38, of Evans, Ga., who saved a 2-year-old boy in a runaway car in Martinez, Ga., on Aug. 8, 1989.

-Ricky D. Bailey, 31, of Zachary, La., who nearly drowned in the same rescue that left Dedon dead. Charles Saucier, 21, of Lake City, Fla., who also nearly drowned in that rescue.

-Robert L. Mathews, 32, of Warren, Ohio, who entered a burning house in Warren three times to rescue a 3-year-old boy from his bedroom Nov. 17, 1989.

-Michael J. Smith, 31, of St. Thomas, Ontario, who saved a 10-year-old boy from drowning in Lake Erie on Port Burwell, Ontario, on Aug. 4, 1989.