South entrance of Pershing Square Station during Metro Red Line construction on Flickr.

This photograph depicts the south entrance of Pershing Square station during construction. The contractor’s staging area is visible in the foreground.

The camera that took this photograph was located on the 8th floor of the Title Guarantee Building located on the northwest corner of 5th and Hill Streets.

This item is from a collection of of Pershing Square Station Construction Progress Photographs. Finding aid for this collection is at the Online Archive of California: www.oac.cdlib.org/findaid/ark:/13030/c80z743t/

Construction of Pershing Square Station on Flickr.

Future site of the 5th and Hill Street Station. Photograph contains view of westerly detour and work area showing drill rig setting on obersvation well used to monitor groundwater.

When taking this photo, the camera was located on the 11th floor of the Clark Hotel, located at 424 South Hill in downtown Los Angeles.

This item is from a collection of of Pershing Square Station Construction Progress Photographs. Finding aid for this collection is at the Online Archive of California: www.oac.cdlib.org/findaid/ark:/13030/c80z743t/

MTA-Slides_0140 on Flickr.

Temporary street decking at Wilshire and Western during construction of the second Minimum Operating Segment of the Red Line circa 1993. The portion of the subway that runs from Wilshire and Alvarado to Wilshire and Western is now known as the Purple Line.

MTA-Slides_0296 on Flickr.

MacArthur Park in 1993 during construction of the Red Line.

SCRTD - Boring Machine Complete RTD_2005_11 on Flickr.

November 19, 1987

Completed boring machine, digging the tunnel for the Red Line station at Wilshire and Alvarado.

San Bernardino Freight Yard on Flickr.

circa 1940.

Track workers in San Bernardino freight yard, looking south.

San Bernardino Freight Yard on Flickr.

circa 1930

Track workers at the North end of the San Bernardino freight yard.

Sixth and Main Station Bus Deck on Flickr.

circa 1947.

This photograph depicts workers laying steel beams to widen Pacific Electric’s Sixth and Main Street Station’s Elevated bridge over Los Angeles Street which served as the station’s bus deck.

Construction of the Alpine Division on Flickr.

circa 1890

This photo depicts laborers constructing right-of-way for the upper section of the Mt. Lowe Alpine Division through Los Flores Canyon. Professor Lowe is seated, center, with binoculars. The Alpine Division was constructed by the California Construction Co. a wholly-owned subsidiary of the Lowe family.