There are quite a few people who worked with Kings Dominion during the KECO/Taft and Paramount days that took a lot of the concept and planned works with them when they left during the administrative changes. Pretty much the only departments to survive the changeovers without major personnel shakeups are operations (rides, park services, aquatics, admissions, entertainment) and maintenance.
One is probably grizzly ‘relocated’. The other maybe WHite water canyon perceived? I’m just guessing. Maybe neither, they might just be ideas that never came to fruition.
Just curious, what makes them gentle? As opposed to just tracked ride plots?