The Los Angeles Section has seven Branches over a ten-county area. Extending from the Pacific Ocean on the west to the Arizona-Nevada state line on the east, it abuts the San Diego Section on its southern boundary. The L.A. Section currently has the following six National Historic Civil Engineering Landmarks: Colorado River Aqueduct, Arroyo Seco Parkway, Tehachapi Pass Railroad Line, First Owens River-Los Angeles Aqueduct, the Tustin Blimp Hangars, and Morris Dam.
In 1974, the Los Angeles Section History & Heritage Committee published a booklet entitled, Historic Civil Engineering Landmarks in Southern California, which covered the 10 counties within the Los Angeles Secton. This document, as well as all landmarks of the Los Angeles Section, can by accessed by the links below.