CHICAGO DAILY TRIBUNE, Dec. 22, 1928 

* Boulder Canyon Project Act 
* Calvin Coolidge signs into law
* Paves the way for the Hoover Dam 

The front page has a one column heading: "COOLIDGE SIGNS BOULDER BILL; UP TO STATES" with subhead. (see images) 
Complete with all 34 pages, rag edition in very nice condition. 

Background: On December 21, 1928, President Calvin Coolidge signed the Boulder Canyon Project Act into law, a pivotal moment in American history that effectively reshaped the physical and economic landscape of the American West. By authorizing the construction of what would become the Hoover Dam and the All-American Canal, the legislation successfully tamed the volatile Colorado River, transforming a destructive source of seasonal flooding into a managed lifeline that secured crucial water rights for California's Imperial Valley. The historical significance of this event extends far beyond flood control, as it established a massive federal framework for water reclamation, resolved a bitter multi-state political deadlock over the Colorado River Compact by bypassing Arizona's refusal to ratify, and created the hydroelectric infrastructure necessary to fuel the explosive, 20th-century urban growth of major southwestern metropolises like Los Angeles, Las Vegas, and Phoenix.