Left to right shown are: Elwood Mead, Comm. Of Reclamation; Phil Swing, author of the bill, a member of House of Representatives from California; President Coolidge; U.S. senator Hiram Johnson, another author of the boulder Dam bill; Addison T. Smith, Chairman, Committee on Reclamation, House of Representatives; W.B. Matthews, General Counsel, Boulder Dam Association, Los Angeles, California. The occasion is the signing of the Boulder Dam bill, Dec. 21, 1928.

Sign animation: Chasing, flashing, oscillating
Notes: All of the bulbs, which reside in the fascia signs which designate entrances, oscillate rapidly. The entrance sign a bit closer to the north end of the property also contain the pan channel star shapes, with incandescent bulbs in the center. The bulbs which, reside on the widths edge of the small pole sign at the south end of the property, oscillate giving a twinkling effect. The main pylon's animation is rather simple considering the amount of lighting. Bulbs which create the dazzling background chase each other upward to the very point, then once they reach the top, each letter light up from left to right, one at a time, then off one letter at a time. The letters all turn on simultaneously while, while the background chases up, leaving the lights off in its trail. The text then shuts off as well. The small incandescent bulbs lacing the background of the main body of the sign oscillate subtly, twinkling themselves. Each letter of the text contains a single row of incandescent bulbs, just inside the border of the red neon. This row is always on in a chasing animation from left to right even when the letters are dark. The animation for the three sided, pole sign, at the north end of the property is adorned with sparkling animation as well. The purple bulbs, which create the border of the main base, chase each other from bottom to top, and the star shape in the center is filled with oscillating incandescent bulbs. The bulbs, which also encrust the bottom surface of the cabinet, oscillate as well. The incandescent bulbs, which adorn the background of the text portion of the sign, also sparkle with a soft random oscillating pattern. The stars which sit on top of the cabinet, animate in a random, non descriptive fashion. The inner star shaped pans oscillate with incandescent bulbs, and the neon borders flash on then off, in a clumsy random order. The three-sided sign also rotates, one of the few animatronic signs on the Strip.