American Society of Civil Engineers Los Angeles Section Desert Area Branch Historic Civil Engineering Landmarks (L) = Local HCEL        (R) = Region 9 HCEL        (N) = National HCEL Desert Area Branch Landmarks Map Desert Area Branch Website Los Angeles Section Landmarks Map Los Angeles Section Landmarks List Region 9 National Historic Civil Engineering Landmarks List Los Angeles Section Website No. Landmark Name Location Latitude Longitude 15 First Owens River Los Angeles Aqueduct  (L) Los Angeles, Kern, and Mono Counties, California 34.3273 -118.4978 25 Tioga Pass Road  (R) Mono/Tuolumne Counties, California Begin (West): Lat: 37.7527 Lon: -119.7976 End (East): Lat: 37.9108 Lon: -119.2579