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CLAY STREET HILL RAILROAD - 1873
Starting at the intersection of Kearny and Clay Streets
the line proceeded up the sixteen percent grade on
Clay to Leavenworth Street. The Clay Street line,
an immediate success, was promptly extended west to
Van Ness Avenue in 1877, replacing horsecars along
the .4-mile route. Hallidie’s design involved
a dummy car with driver pulling a trailer for passengers.
The trailer was enclosed, similar to a horsecar, while
the dummy, or gripcar, was open to the air, with bench-type
seating. The system employed two turntables at the
bottom terminus of the line. The dummy and car were
uncoupled and each was moved onto one of the turntables,
where it was rotated 90 degrees by the crew, hooked
up again and sent back up the hill. At Leavenworth
a single turntable with turnout was used to reverse
the cars for the trip back down.
A powerhouse located at Clay and Leavenworth drove
the line. It was a two story wooden structure, the
basement being the engine room, containing the boilers,
while the first floor was used for car storage and
the second floor for car painting and repairing. The
winding machinery sat 15 feet below the sidewalk in
a vault. Inside the cable passed through pullies and
sheaves, which maintained tension on the line. Outside
the powerhouse, 8 foot deflecting sheaves moved the
cable into a conduit consisting of cast iron yokes
supported by wooden planking, forming a 22”
by 16” tube under the street, through which
the cable ran. A 3/4-inch slot in the street provided
access for the gripping device on the dummy, which
consisted of a large hollow screw that was raised
and lowered into the tube by a hand wheel. An upper
wheel and lower wheel brought the grip in contact
with the cable and moved the car along the line. The
gripman employed a series of shoe and pedal brakes
to stop the car, along with an iron drag pole to prevent
slipping on grades and a crude emergency brake as
last resort.
The Clay Street Hill Railroad ran as an independent
line until 1888, when it was sold to the Ferries and
Cliff House Railroad, and incorporated into its Clay-Sacramento
line. The old double tracks were replaced with a single
set on Clay in 1891, and a bottle of champagne was
broken over the grip, as a tribute to the first cable
railroad in San Francisco.
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