In a release Wednesday, attorney Lawrence Grassini says client Fabiola Esparza was 15 when she suffered permanent brain injury in the 2008 accident near Blythe, Calif.
Grassini says the watercraft Esparza and two others were riding became impossible to control through a defect the maker, Polaris, knew about.
About half of the award will be paid by Polaris, with the rest paid by the drivers of the two watercrafts involved in the collision.
Polaris did not immediately respond to a request for comment.
Esparza's lawyers say the company stopped making personal watercraft in 2004.