| The 99 is ex-Amherst Industries 99, exx-Bethlehem Mines 335, exxx-Patapsco & Back Rivers 335, nee-Baldwin Locomotive Works DF100. Built as a DS4-4-1000 in 12/49, she was used in a test program to develop the 600-series engine into a dual-fuel power plant (burning either diesel or natural gas). The unit was used just as a means to transport the test engine. The dual fuel 600-series engine would have been used in stationary applications only - it was never intended for railroad use. Upon sale to P&BR, the unit was repowered with a 606A engine. |