 Faidherbe Bridge is a road bridge over the Sénégal River which links the island of the city of Saint @-@ Louis in Senegal to the African mainland . The metal bridge is 507 @.@ 35 metres ( 1 @,@ 664 @.@ 5 ft ) long and 10 @.@ 5 metres ( 34 ft ) wide , weighing 1 @,@ 500 tonnes ( 1 @,@ 500 long tons ; 1 @,@ 700 short tons ) . It has eight spans , of which the longest five are 78 @.@ 26 metres ( 256 @.@ 8 ft ) . 
