Renewable and Sustainable Energy Figure 1 — Lights of the United States power grid prior to July 2, 1996. Figure 2 — The same power grid after a single branch fell on a single power line in the Northwest. Figure 3 — Kneeland residence in Soldotna, Alaska. Figure 4 — Click dome located in Bandera, Texas. Figure 5 — Frontier Elementary in Payson, Arizona.