Built in 1967, by Jacksonville Shipyard of Jacksonville, Florida (hull #648) as the Esso Delaware Valley for the Esso Shipping Company of Wilmington, Delaware.
In 1972, the Esso Shipping Company became the Exxon Shipping Company of Wilmington, Delaware where the tug was renamed as the Exxon Delaware Valley.
In 1973, the Exxon Shipping Company renamed the tug as the Exxon San Jacinto. Where she was transferred to duties as an assist tug in Houston, Texas.
In 1993, in the wake of the Exxon Valdez incident. The Exxon Shipping Company was rebranded as the SeaRiver Maritime Company of Houston, Texas. Where the tug was renamed as the S/R San Jacinto.
In 1999, the Exxon Oil Company merged with the Mobil Oil Corporation to form the ExxonMobil Corporation of Irving, Texas. The SeaRiver Maritime Company continued to operate as a subsidy of the ExxonMobil Corporation. And, the tug retained her name.
In 2003, the tug was acquired by the McAllister Towing and Transportation Company of New York, New York. Where she was renamed as the Roderick McAllister.
Powered by two, Caterpillar 12-D398 turbo diesel engines. With Lufkin reduction gears, at a ratio of 7.14:1. She is a twin screw tug, fitted with kort nozzles, and flanking rudders. For a rated 1,800 horsepower.
The tug's capacities are 26,670 gallons of fuel oil, 628 gallons of lube oil and 3,480 gallons of potable water. She is also outfitted with two fire monitors rated at 1,500 Gallons Per Minute.
(Robert Silva, Auke Visser)