The Clarendon Gorge Bridge, also called the “Bob Brugmann Memorial Bridge” or simply the “swinging bridge” was built in the summer of 1975. It replaced an earlier bridge that had been built in 1957 and spanned the gorge at the same spot. (That bridge, also a cable-suspension type bridge, replaced a covered bridge which was built circa 1906.) On June 30, 1973, heavy rains had raised the level of the Mill River and washed the 1958 bridge away. On July 4, more rains again brought the river to near flood…