• 3 Dams
• 2 Colorado-Big Thompson Project (U.S.)
• 2 Gonzalez, Xavier, 1898-1993
• 1 Construction workers
• 1 Diebenkorn, Richard, 1922-1993
• 1 Irrigation
• 1 Magafan, Ethel, 1915 or 1916-1993
• 1 Refregier, Anton, 1905-1979
• 1 Sun River Irrigation Project (U.S.)

• 2 Gonzalez, Xavier, 1898-1993
• 1 Diebenkorn, Richard, 1922-1993
• 1 Magafan, Ethel, 1915 or 1916-1993
• 1 Refregier, Anton, 1905-1979

• 5 English

• 1 Big Thompson River Valley
• 1 Grand Coulee Dam (Wash.)
• 1 Salt River Valley (Gila County and Maricopa County, Ariz.)

Limit year range