• A section of the bowsprint and figurehead on the bow of BALCLUTHA.

    San Francisco Maritime

    National Historical Park California

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  • Ferryboat EUREKA closed for maintenance.

    Ferryboat EUREKA is closed for maintenance. The gangway that links the ship to the pier is being repaired.

Preservation

Two men standing beside a large, black steam winch.

Park employee Erik Olson and Volunteer Ed Neubuer next to the steam donkey engine on Hyde Street Pier. This engine was used until 1968 aboard a derrick barge belonging to the Port of Oakland.

NPS

Steam Donkey Engine

Donkey engines, like the one at the entrance to Hyde Street Pier, were common along the waterfront from the 1880s into the 1920s. These portable steam winches were used as auxiliary power for loading and unloading cargo.

The name "donkey" comes from the fact that these engines replaced horses as a power source for cargo handling. The term was also applied to similar engine and boiler units carried aboard ship.

Donkey engines were also employed in construction work and in lumbering and mining. This engine was used until 1968 aboard a derrick barge belonging to the Port of Oakland.

The engine had not produced steam lately because the tubes in the boiler needed to be replaced. So, during the 2011 summer, park employees and volunteers, lead by Erik Olson, (aka Mr. All-Things-Steaming) fixed it.

They carefully dismantled the boiler from the engine frame, cut out the old, corroded tubes, and rolled (installed) 96 new ones. Volunteer Extraordinaire Ed Neubuer accomplished most of the retubing work. The boiler was then filled with water and put through a hydrostatic test to check the seals around the tubes-only one tube needed to be fixed. After some cleaning and painting work the engine is once again up and running for park visitors to see it in action. When you hear that whistle, you'll know we're steaming!

We fire-up our donkey engine using wood to heat water in the boiler to create steam. The engine propels an adjacent winch and powers an awesome, ear-splitting whistle atop the boiler that is heard throughout Fisherman's Wharf. So loud in fact it was painful, so an employee found a quieter model that we now use.

 
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Two men standing next to a steam winch.
Erik Olson, (aka Mr. All-Things-Steaming), and Volunteer Extraordinaire Ed Neubuer, talking with visitors about what it takes to keep the donkey steaming.
NPS
 
An historic photo of a 19th century San Francisco wharf.
Green Street Wharf in San Francisco during the 1880s. On the left side of the photo is a donkey engine in use. A wire rope is visible running from the hoist drum up to the square-rigged ship where it probably ran down through a block and attached to a sling load of cargo to be moved from the ship's hold. The wooden cart with wheels probably held coal or wood used to heat the water to produce the steam.
NPS SAFR A12.152nb

Did You Know?

The CA Thayer, a lumber schooner, built in 1895 in Northern California.

Once, hundreds of sailing schooners carried lumber to San Francisco from Washington, Oregon, and the California Redwood Coast. Built in 1895, C.A. Thayer, once part of that mighty Pacific Coast fleet, survives at San Francisco Maritime NHP. More...