Paul Solet, who helmed the 2009 Sundance hit “Grace,” has come on board to write and direct the documentary “Tread” which chronicles the destruction of a small Colorado town by a man driving a fortified bulldozer.

Glen Zipper (“Undefeated”) and Sean Stuart (“All Things Must Pass”) will produce the pic with Raphael Swann and Victor Shapiro of Sunset Junction Entertainment exec producing.

“This movie will explore those polarized interpretations and let you to draw your own conclusions about who Marvin Heemeyer was and what drove him to do what he did,” Solet said.

The doc will use both cinematic recreations with archival footage from the event and audio tapes of Heemeyer himself recorded in the months leading up to the event.

Solet most recently directed the thriller “Dark Summer.” He is repped by PYE, Paradigm, and Schreck Rose Dapello & Adams LLP.

In addition to producing the Academy Award-winning documentary “Undefeated,” Zipper produced the non-fiction horror film “The Nightmare” for director Rodney Ascher, the Grammy-winning “Foo Fighters: Back and Forth” for James Moll and “Deep Web” for director Alex Winter.