“Bellflower” producer Vincent Grashaw is set to make his feature directorial debut with “Coldwater,” an indie drama he co-wrote with Mark Penney.Pic, which aims to expose the stark realities behind juvenile rehabilitation in the U.S., follows a teenage boy’s struggle for survival inside a wilderness boot camp, where a retired war colonel and his counselors break inmates’ spirits to correct delinquent behavior. Grashaw is producing with Skipping Stone Entertainment principals Kris Dorrance and Mike Dorrance, as well as Dave Gare (“Law Abiding Citizen”) and Sarah Farrand of Gare Farrand Entertainment. Flying Pig Prods. CEO Joe Bilotta will exec produce. Casting is under way, and production is skedded to start in August in the Sierra Nevada. Grashaw produced Evan Glodell’s Sundance sensation “Bellflower” through his Coatwolf Prods. banner, and he also co-starred in the pic. The filmmaking duo were nominated for the John Cassavetes Award at this year’s Independent Spirit Awards. Grashaw is also attached to direct Grade-A Pictures’ thriller “Anatomy” early next year. He’s repped by attorney James Feldman of Lichter, Grossman, Nichols, Adler & Feldman.