7-10-12 (Slayton, MN) --  A Lamberton man died in a boating accident Sunday on Lake Shetek (shuh-TEK') in southwestern Minnesota.  49-year-old Perry Altermatt was killed when the 21-foot fiberglass boat he was in wedged under a bridge.  Two others in the boat were injured and taken to a local hospital.  The cause of the accident is still under investigation.