David Cushman Coyle

David Cushman Coyle (1887–1969) was an American structural engineer, economist, and writer. Coyle was the structural engineer of the Washington State Capitol and a prominent economic thinker during the New Deal.^[1]

David Cushman Coyle was born in 1887. His parents were John Patterson Coyle, a Congregational minister, and Mary Cushman Coyle. His sister was Grace Coyle (1892–1962).^{[citation needed]}

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Coyle was a structural engineer, economist and writer.^[2] He also wrote several books on economic theory and policy, including Brass Tacks (1935) and Uncommon Sense (1945).

He engineered the concrete dome that spans the building's rotunda using a cantilevered truss system. At 287 feet in diameter, it remains the largest free-standing masonry dome in North America.^[3]

Coyle had two sons, and a daughter by his first wife. He was married to Doris Porter Coyle upon his death.^[4] He resided in Washington, D.C. and Cliff Island, Portland, Maine, and vacationed in Cape Porpoise, Maine.^[4] He was a member of the Cosmos Club in Washington, D.C. He died in 1969 in Washington, D.C.^[4]

• Uncommon Sense, (1936)
• America, (1941), published by National Home Library Foundation
• "Tolerance and Treason", The Yale Review, (Spring 1948)
• Conservation: An American Story of Conflict and Accomplishment, New Jersey: Rutgers University Press (1957)
• The United States Political System and How it Works, (1957)
• The United Nations and How It Works, (1965)
• Roads to a New America, (1969)

• Works by or about David Cushman Coyle at the Internet Archive