Thousand Islands Bridge Hill Island in Canada. Thousand Islands International Bridge system is a series of five bridges that span parts of the St. Lawrence River, ultimately connecting both banks. The southern end of the bridge connects with Interstate 81 and the northern end of the bridge connects to Highway 401 via Highway 137. There is also an interchange with the Thousand Islands Parkway on the Ontario side. The bridge suffered aerodynamic-related structural problems (oscillations) shortly after its opening, these were quickly corrected via structural upgrades. The bridge system is administered by the Thousand Islands Bridge Authority, a New York State public benefit
Thousand Islands Railway build the line; that company already operated steamship docks in the village. The original line opened 1 January 1884. The company name was changed to Thousand Islands Railway four months later. A swing bridge over the mouth of the Gananoque River was constructed in 1894 to provide service to businesses on the east side of the river. The line originally served to carry timber and freight to Gananoque's docks, where it could be loaded onto ships. While available timber stocks soon diminished, passenger traffic increased as the Grand Trunk under Charles Melville Hays promoted the tiny town as a vacation