<Tr> <Td> Islamorada (Lower Matecumbe Key) </Td> <Th> 74.403 </Th> <Td> 119.740 </Td> <Td_colspan="1"> Gulfview Drive </Td> <Td> </Td> </Tr> <Tr> <Td> Islamorada </Td> <Th> 77.531--77.703 </Th> <Td> 124.774--125.051 </Td> <Td_colspan="2"> Bridge over Lignumvitae Channel </Td> </Tr> <Tr> <Th> 77.966--78.353 </Th> <Td> 125.474--126.097 </Td> <Td_colspan="2"> Bridge over Indian Key Channel </Td> </Tr> <Tr> <Th> 79.177--79.318 </Th> <Td> 127.423--127.650 </Td> <Td_colspan="2"> Bridge over Tea Table Channel </Td> </Tr>

How did they build the florida keys highway