RedactedNarrative: On July 7, 2016 received a call from the operators of Top Gun Watersports advising that an accident on one of their jet- ski rentals had just occurred. I responded to the area where I was meant by the owner. I was advised that V-1 had rented one of the jet-ski''s and was involved in an accident. I made contact with V-1 who advised that after leaving Sharks Cove Marina that she had started south down the Fenwick canal. Upon going under the Fenwick bridg, her vessel was struck by a large chunk of concrete approximately 4 foot by 6 inches that came from the underside of the bridge. The piece of concrete struck the front of the vessel, where the concrete broke into pieces, one of which struck her right foot. The damage to the vessel ranged on the hood of the front jet ski hatch and down both sides.V-1 did report the accident to Top Gun staff but then proceeded out into the Big Assawoman Bay to keep riding. V-1 did deny any medical attention numerous times but did take an ice pack from Top Gun. I contacted Del-dot who did send out numerous work crews to inspect the bridge. The state is self-insured if insurance info should be needed for this case.