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

    San Francisco Maritime

    National Historical Park California

There are park alerts in effect.
show Alerts »
  • Hyde Street Pier Closed Mondays through Thursdays (July 24 - August 20)

    For public safety, Hyde Street Pier will be closed mid-pier Mondays - Thursdays from July 24 - August 20 during replacement of Eureka's mooring piles. There is no access to the historic ships. The visitor center, Maritime Museum & Aquatic Park are open. More »

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.

 
(object placeholder)
 
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?

San Francisco Fire, 1906. A painting by William A. Coulter.

San Francisco Fire, 1906. A painting by William A. Coulter. The "Great Earthquake" shook the city at 5:12 am on Wednesday, April 18, 1906. William A. Coulter, a maritime artist and journalist, painted this scene on a ten foot wide window shade that he pulled from a demolished bank building in the rubble of the still-burning city. More...