School Street Sidewalks and Retaining Walls - Colfax CA The former Colfax Grammar School (now Sierra Vista Community Center) and environs were developed by the Work Projects Administration (WPA) in 1940. Both the surrounding sidewalks and retaining walls bear multiple "WPA 1940" imprint stamps. One instance is shield-shaped.
Locations and coordinates of sidewalk imprint stamps (on the north side of School Street):
(S1) Eastern end of retaining wall: 39.102562, -120.952843
(S2) School Street building entrance: 39.102710, -120.953671
Interestingly, WPA stamp "S2", which faces south, away from the former school entrance, is adjacent to a second, fainter, impression. That stamp, which faces east, appears almost as though it had been created in error, and then corrected...