SAN CARLOS UPPER DAM SITE. LEFT BANK ABUTMENT. Showing point at elevation of 180 feet on line H.

H. Doc. 791, 63-2.

PLATE 10.

WESTERLY WALL, SAN CARLOS BOX CANYON. Showing fault which crosses canyon at line M. Catamaran is at hole 2, line M; other derrick is at hole 3, line K; stagings are at holes 5 and 6, line H.

WESTERLY WALL, SAN CARLOS DAM SITES. LOOKING UPSTREAM.

Showing fault which crosses canyon at line C, and to which the fracture shown in Plate 4 probably extends.