The Antiquities act of 1906 authorizes the president to create national monuments on federal lands that contain historic landmarks, historic and prehistoric structures, or other subjects of historic of scientific interest.
On June 8, 1906, President Theodore Roosevelt signed the Antiquities Act into law.
Devil's Tower was the first national monument. It was established September 24, 1906.
Theodore Roosevelt signed the Reclamation act
The act founded the U.S Reclamation Server to reclaim and arid West by developing systems in 17 Western states/territories.
Signed on June 17, 1902
Salt River Canyon was selected for Roosevelt Dam, which was developed by the National Reclamation Act.