Pg.19 #2521 Forms in the upstream plug of Diversion Tunnel No. 2. Jan 27th, 1934. Pg.19 #2522 Forms in the upstream plug of Diversion Tunnel No. 3. Jan 27th, 1934. Pg.19 #2525 Placing concrete lining in Arizona upper penstock tunnel. Jan. 27th, 1934. Pg.19 #2524 Placing concrete lining in Arizona upper penstock tunnel. January 27th, 1934.