The S-310 Boat Lock near Clewiston is now open to public access during normal daytime operating hours, 5:30 a.m. - 9 p.m., effective immediately. Starting Oct. 1, the lock will be open 5:30 a.m. - 8 p.m. Boats may now use the lock to navigate between Lake Okeechobee and the Industrial Canal and C-21 Canal.