|We spent several days around the Shasta Mountain area. On Thursday we toured the second largest gravity concrete dam in the U.S. Can you name the largest concrete gravity dam? It is in the state of Washington. It took 6 million cubic yards of concrete to build the dam. Just think of this...the amount of concrete it took to build the dam could create a sidewalk that is 36 inches wide and 4 inches deep that would reach all the way around the world at the Equator. Have your teacher or your parents help you find the Equator on a globe. The power plant at the dam produces enough power to serve the city of San Francisco. We also toured the William Ide Adobe Historical Park. The adobe house which Mr. Ide built in 1846. Adobe is a form of clay soil and it was mixed with straw and water, then formed into bricks that were 12 inches wide, 8 inches high and 3 inches thick. It was very warm in the winter and nice and cool in the summer. The tree you see in front of the house is an Oak which is over 400 years old. They have lots of programs for school kids to learn how to make candles, make adobe bricks, woodworking, spinning wool, and cooking like they did in the 1800's.