The year may be winding down, but Big Muddy Dance Company is just getting started. The contemporary dancers embark on their sixth year of public performances with the company's season kickoff tonight at 8 p.m. at Washington University's Edison Theatre (6465 Forsyth Boulevard; www.thebigmuddydanceco.org). The show features two world premieres and two company favorites, with choreography by Autumn Eckman, Bryn Cohn and artistic director Brian Enos. Big Muddy's Elevate Student Project opens the night with a piece by Erin Prange. Tickets for the show are $20 to $25.