The boy's father and brother were also injured when their raft overturned and trapped them in the water in 2021.
Bill Lentz, Adventureland's general manager, said in a letter posted on the park's website Friday that after spending months reviewing the safety of the Raging River ride, officials decided to close it permanently.
"The decision comes after months of examination of the ride, working closely with its manufacturer to identify what enhancements each would need to meet our operating standards," Lentz said in the statement. "Based upon that review, the best path forward is to close Raging River, and focus on enhancing the Adventureland experience elsewhere.
The Jaramillo family filed a lawsuit against Adventureland and its former owners in June 2022, and a separate claim against the state of Iowa in September 2022. That lawsuit is tentatively set for trial next spring. The former owners have maintained that the ride was safe.State officials cited the park in November 2021 for 17 safety violations related to Jaramillo's death.
In 2016, seasonal employee Steve Booher, 68, was killed after he fell when the ride began moving unexpectedly. He became wedged between a boat and a concrete sidewall, and his head was repeatedly rammed. He died days later.