A maintenance worker at a power utility dam was working alone on a tugboat. He was on the deck of the tug, attempting to empty two 45-gallon drums of bilge water by tipping each of them over the side of the small vessel. He was not wearing a lifejacket, presumably because the passageway to the engine room was too narrow for him to squeeze through with it on. Evidence indicated that he had slipped on the deck while tipping over one of the 450-pound drums. The deck at one time had been painted with a non-slip material, which had worn off. […]