Coons' kick came at the end of an eight-play, 63-yard drive engineered by Keith Price, highlighted by a 19-yard completion to Kasen Williams at the Oregon State 18-yard line on third-and-7.
Price went 18-of-30 for 194 passing yards and an interception, while Williams finished with five grabs en route to 61 yards for the Huskies (4-4, 2-3 Pac-12).
The Beavers (6-1, 4-1 Pac-12) had forged a 17-17 tie in the fourth quarter when Cody Vaz hooked up with Connor Hamlett on a 29-yard scoring pass.
Vaz (7-for-11, 97 yards) relieved OSU starter Sean Mannion, who was benched after surrendering four interceptions.
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