The Gila despite its age had better engines , and so it was chosen .
Both the 23 - year - old Mohave II and the Gila , with 35 years on the Colorado River , had worn hulls only kept going with a lot of maintenance .
The Gila despite Gila 's age had better engines , and so it was chosen .
Both the 23 - year - old Mohave II and the Gila , with 35 years on the Colorado River , had worn hulls only kept going with a lot of maintenance .