A Diesel-Powered Train, using an internal combustion diesel engine instead of Steam was designed entirely by Al Laprade of Jefferson, NH, this year using a 600 horse-powered John Deere Engine.
#9 has been modified to burn biodiesel fuel instead of Coal. This new environmentally friendly oil burner was designed by Nigel Day.
The Cog modified this Snow-Jet for snow removal on the tracks. Uses a Pratt & Whitney J59 Jet Engine.
The Mount Washington Cog Railway automatic hydraulic switch at Waumbek was completed in the 2003.
The first automatic switch was installed at Waumbek. Al LaPrade - the designer of the switches at both Marshfield Base and Waumbek - designed another new switch and supervised the installation at Waumbek.