Ross Dam, completed in 1937
Ross Dam is a 540-foot (160 m)-high, 1,300-foot (400 m)-long concrete thin-arch dam across the Skagit River, forming Ross Lake. The dam is in Washington State, while Ross Lake extends 23 miles (37 km) north to British Columbia, Canada. Both dam and reservoir are located in Ross Lake National Recreation Area, is bordered on both sides by Stephen Mather Wilderness and combined with Lake Chelan National Recreation Area they make up North Cascades National Park Complex.
http://en.wikipedia.org/wiki/Ross_Dam
Britain's American colonies broke with the mother country in 1776 and were recognized as the new nation of the United States of America following the Treaty of Paris in 1783. During the 19th and 20th centuries, 37 new states were added to the origina... ... read more 
