American Society of Civil Engineers Los Angeles Section San Bernardino/Riverside Branch Historic Civil Engineering Landmarks (L) = Local HCEL        (R) = Region 9 HCEL        (N) = National HCEL San Bernardino/Riverside Branch Landmarks Map San Bernardino/Riverside 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 11 Colorado River Aqueduct  (N) Riverside & San Bernardino Counties 34.2964 -114.1327 12 Coachella Valley Irrigation System  (L) East Riverside County 33.670 -116.1744 16 Colorado River Gas Pipeline Suspension Bridge  (L) California-Arizona Border 33.6018 -114.5332 17 Bear Valley Dams  (L) San Bernardino County 34.2423 -116.9779 18 Hemet Dam & Reservoir  (L) Riverside County 33.6667 -116.6944 21 Mill Creek Zanja  (L) Redlands 34.0555 -117.1215 24 Mill Creek Hydro Electric Plant (R) Redlands 34.065 -117.18 46 Barstow Yard  (L) Barstow 34.8987 -117.0641 50 San Bernardino Initial Point  (L) San Bernardino County 34.1203 -116.93 52 Palm Springs Aerial Tramway  (L) East Riverside County 33.8371 -116.6141