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A former Jenks High School teacher died Tuesday morning after crashing head-on into a tractor-trailer on Oklahoma 33 southwest of Mannford.

Gregg Hartney, 66, was driving west on the highway around 9 a.m. when his 2008 Kia Rondo crossed the center line and crashed into an eastbound 2005 Freightliner, said Dwight Durant, Oklahoma Highway Patrol spokesman.

Hartney was pronounced dead at the scene, Dwight said.

The truck driver, identified in an OHP report as 42-year-old Cushing resident Joe Hogrefe, was not injured.

The collision occurred less than a mile east of 369th West Avenue, about seven miles south and two miles west of Mannford, the OHP reported.

Hartney retired from teaching speech and debate at Jenks High School in May 2015, said Bonnie Rogers, Jenks Public Schools spokeswoman.

Paris Burris 918-581-8386 paris.burris@tulsaworld.com Twitter: @ParisBurris