Two construction workers rushed to the aid of a 20-year-old Madison woman who was being sexually assaulted in downtown Madison around lunch time Tuesday, police said. Kevin Kieren, age 32 with no permanent address, was charged Wednesday with fourth-degree sexual assault, lewd and lascivious behavior and disorderly conduct. A repeater provision was added to all three charges. The woman, who lives in downtown Madison, was walking in the 300 block of East Johnson Street at about 11:45am when she was attacked by a stranger who groped her and began to drop his pants, said Madison police spokesman Joel DeSpain. As the woman yelled for help, the construction workers, who were up on a lift on a job site across the street, yelled at the assailant to get away from her and began lowering the lift while calling out to the woman to come to them, DeSpain said. While one of the workers remained with the shaken woman, the other worker tried to keep the attacker, “who was advancing on him, still with his pants down,” at bay. DeSpain said the two construction workers will be nominated for Police Department awards.