An adjoining car shop, built at about the same time, was also of stone and was later extended with a wooden structure.
He was credited with developing the first anthracite-burning locomotive, and was Superintendent of Motive Power for the line for many years.
The younger Millholland was tasked with building the C&P shops, to maintain the mixed fleet of motive power.
Millholland bought good machine tools, which were still in use 40 years later as evidenced by the 1917 ICC valuation.
He equipped the shops with metal working machinery from Bement & Dougherty, probably a predecessor of Wm.
Savage Shops was limited to repairing and rebuilding the Winans Camels and other early C&P locomotives.
The shop force gained much hands-on experience during the first twenty years; at least 15 of the C&P's camel-backed locos were rebuilt at Mt.
Typical of the rebuilds was the engine Highlander, a Winans Camel inherited from the Mount Savage Railroad.
It was a modernization project in which, among other things, the cab was relocated from on top of the boiler to the rear position.
The C&P shops also provided repair services to its rivals in the Georges Creek coal region.
Initially, the Winans Camels and other early locomotives were extensively rebuilt, and much hands-on experience was gained during the period from 1866 to 1888.
A locomotive catalog was issued for the Works by their agent, Thomas B. Inness & Co. of Broadway, New York.
Narrow gauge engines proved so popular a product that the works installed a third rail up the main line from Mount Savage for customer acceptance testing.
He built mine engines and smaller narrow gauge locomotives at his shops, but contracted with Mount Savage for his larger orders.
His Frostburg works were located near the existing C&P Passenger station, and some of the buildings still stand in 1999.
All of the rotating power machinery was driven by leather belts from overhead master shafts.
The typical boiler was constructed of 5/16-inch wrought iron, starting as plate, and rolled to shape.
This produced large clouds of asbestos dust that is now known to be a major carcinogen, a significant cause of lung cancer.
Millholland is also responsible for the development of the poppet throttle, originally retrofitted on Camel engines in Pennsylvania.
On the basis of his previous experience, Millholland favored cast-iron tires, shrunk onto the wheels.
The early lubricants were all animal fat based, and only suitable for low temperature applications.
C&P tenders were also fitted with lamps on the rear, since the engines frequently operated in reverse on the various coal branches where they could not be turned.