Its development is 17,793 metres ( 58,376 ft ) for 415 metres ( 1,362 ft ) depth .
The Malissard River develops on a north - south axis and exits the karst spring of the Guiers Vif .
Malissard River 's development is 17,793 metres ( 58,376 ft ) for 415 metres ( 1,362 ft ) depth .
The Malissard River develops on a north - south axis and exits the karst spring of the Guiers Vif .