With relatively few remaining original roofs, the tops of the walls are exposed to weathering, which ultimately causes severe erosion and collapse. The preservation staff caps each wall with several courses of stone set in a more weather-resistant mortar. This cap takes the brunt of the weathering, sheds snow and rain, and protects the original wall surfaces beneath.
Did You Know?
Richard Wetherill came to Chaco Canyon in 1896 and worked with the American Museum of Natural History. He operated a ranch and trading post there until his death in 1910. To keep warm during the frigid Chaco winters, Richard burned low-grade coal from a mine he constructed.