Many spillways have floodgates designed to control the flow through the spillway. Jetpur town was flooded as the floodgates of Bhadar dam were opened. The engineers decided to raise the floodgates controlling the tunnel spillways. Further downstream, Shelbyville is protected from potential Duck River flooding by levees and floodgates. The concrete dam has eight floodgates, similar to those on the Gatun spillway. The flooding was aggravated by the San Jacinto River Authority's decision to open floodgates. Storm surge warnings can help determine when to close floodgates. Each spillway contains six -wide and -tall steel floodgates. This opened the floodgates to debates which have continued ever since. The advances of the 1860s opened the floodgates and ushered in modern milling practice. But the bottom of the second saw the floodgates open on Reuss. It has two floodgates capable of releasing . Kenshin ordered the river's floodgates to be opened. The freedom of speech also opened the floodgates for meetings and organized political parties. In the fifth, the floodgates opened.