Which of the following is true of the squirrel bridge?

参考解析：

细节理解题。根据最后一段第一句“In 1983, after 20 years of use, Peters took down the worn-out bridge. Repairs were made and crosspieces were replaced. The faded sign was repainted”可知，绳索用了20年后，Peters 进行了修缮，并替换上了新的绳索。说明使用多年以后这座桥梁被重新维修，故C项正确，A项错误。根据第五段第二句“They built the 60-foot bridge from aluminum and lengths of fire hose”可知，桥是由铝和消防水带建造的，故B项错误。根据第五段第一句“After architects designed the bridge, Amos Peters and Bill Hutch started construction.”可知，桥是由建筑师设计的，Peter和Hutch只负责建造，故D项错误。故选C。