November 21, 1940. North End Sewer project. This view shows the construction of the Bradley Road section of the North End Sewer. The Austin Excavator is being employed to excavate all materials and deliver with side delivery elevator into trucks where it is transported back and dumped into the ditch for refilling. This view shows the evidence of boulders and ledge encountered in the excavation. Note the absence of sheeting on this project regardless of the depth of the trench which at this point was approximately twelve feet. The top layer of approximately six feet being sand and loam was broken down from the shoulders with the aid of compressed air tools at a slope which did not endanger the men laying the tile. The bottom six or seven feet of excavation was in solid blue clay. Note the straight sides in the bottom of the trench indicating the stability of this material. Very little water was encountered at this point.