State Police Lt. Col. Todd Catlow said the police dive team inspected the jetty on Salty Brine beach in Narragansett on Wednesday.
Catlow says police are awaiting results of an inspection by the U.S. Army Corps of Engineers, which owns the jetty.
The beach was temporarily evacuated Saturday after a Connecticut woman reported she was thrown into the nearby jetty after a loud boom.
Police say there was no physical evidence of an explosion, and Gov. Gina Raimondo says authorities have ruled out any malicious activity.
A power line owned by the U.S. Coast Guard that ran under the jetty has been inactive for years.