E. L. Ransome left San Francisco a few years later , frustrated and bitter at the building community 's indifference to concrete construction . Ironically , the city 's few reinforced concrete structures , including the Alvord Lake Bridge , survived the 1906 earthquake and fire in remarkable shape , vindicating Ransome 's faith in the method . The bridge was designated a civil engineering landmark by the American Society of Civil Engineers in 1969
1906 earthquake and fire
1906 San Francisco earthquake
Alvord Lake Bridge