RedactedNarrative: On July 17th at approx. 1200 hrs, I observed a houseboat that was refueling at the Cedar Grove Marina catch fire.  The houseboat was tied up at the marina fuel dock when the fire started.  The houseboat was a rental from Cedar Grove Marina that was being returned. The renters were onboard the houseboat when the fire started and were all able to exit the houseboat uninjured.  The fire quickly spread through the houseboat resulting in the marina owner cutting the houseboat loose from the dock.  The houseboat was then pulled into the marina harbor away from all other boats and people.  The houseboat was eventually pulled to the shoreline where fire crews were able to extinguish the fire.  The houseboat was a complete loss and some damage was done to the fueling dock.  There were no injuries reported at the time of the accident.