WILTON, N.Y. (AP) — Authorities say a New York state snowplow driver was involved in two work-related crashes, one of them fatal, and charged with drunk driving while off duty during a 17-day span last month.

Fifty-six-year-old Mark Johnson of Moreau (MOHR'-oh), a Department of Transportation plow truck driver, was involved in a fatal collision on Interstate 87, the Adirondack Northway, on Dec. 22 near Saratoga Springs and a non-fatal crash along the same stretch of highway eight days earlier.

The Post-Star of Glens Falls (http://bit.ly/2iHuwxx ) reports the first crash occurred nine days after state police charged Johnson with DWI while he was off duty. He has pleaded not guilty.

Troopers say the two crashes involving Johnson remain under investigation.

DOT officials say they aren't commenting on his status with the agency because it's a personnel matter.

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Information from: The Post-Star, http://www.poststar.com