Straight from Wikipedia:
Trenton was home to a Rock Island Railroad maintenance facility known as a roundhouse since 1900. The round house provided locomotive overhaul work for the Kansas City terminals and was a major employer for the Trenton area. A bitter strike in the 1940s pitted union workers against the railroad and scab labor who were still feeling the effects of the Great Depression. Strike breaking workers had to carry their tool boxes as they walked several miles to the round house. As a strike breaker named Hobbs walked across the bridge (now known as the Charlie Dye bridge) to Trenton in the early morning he encountered a group of striking union members drunk at the end of the bridge. He reached into his tool box and picked an item that would resemble a pistol and put it into his pocket. When he reached the thugs they jeered him but did not touch him since they had seen him put something in his pocket and he still had his hand on it. The next strike breaker that walked across the bridge was beaten to death.
Local authorities were hesitant to prosecute. Politics favored the strikers and no one was punished for the murder. Rock Island executives were outraged. They settled the strike but closed the roundhouse, moving the overhaul base to Kansas City. The result was that the trend of slow population growth was reversed and Trenton has slowly declined in population since that time.
The bridge was built 1923 by the Southwest Engineering and Construction Company at cost of $60,444.51.
Ref. Centennial History of Grundy County Missouri 1839-1939
by William Ray Denslow. Page 139
As of April 4,2012 the Thompson River Bridge, better known as Charlie Die Bridge, has been closed to traffic due to a failed MODOT inspection. The county is currently debating what to do with it. Will be sad to see it go.