The director of the park said having this course outside of the main LA Olympics area isn’t unheard of. It’s been done before in the 1996 Atlanta Olympics. When a course was built in Tennessee.
The Gold Hill Whitewater Center was recently visited by the architect of that course and an Olympic gold medalist. According to the park, both said they thought the construction would be more than possible. With the Olympic committee looking to save money, it might be a perfect time.