Complex sentence: Steam was provided by four Babcock & Wilcox 515,000 lbs per hour coal fired boilers with steam temperature of 1,065 deg F (566 deg C) and 1,500 psi operating pressure.
Split into simpler sentences: Steam was provided by four Babcock & Wilcox boilers. These fed steam at 515,000 lbs per hour, with a steam temperature of 1,065 deg F (566 deg C) and 1,500 psi operating pressure.