The Sioux Falls Regional Airport, was established in 1939 with a Works Progress Administration grant of $165,000. Soon three runways were constructed, along with a terminal building, and a hangar. There was an unsuccessful movement to name the airport "Tennant Field" in memory of World War 1 veteran pilot and early Sioux Falls aviator Harold Tennant.

WPA 

Works Progress Administration: WPA & New Deal - HISTORY 

Civilian Conservation Corps (history.com) 

Stone Piers - Lake View (lakeviewlifestyle.com) 

Inflation Calculator | Find US Dollar's Value From 1913-2024 (usinflationcalculator.com) 

How did Adolf Hitler rise to power? | Britannica 

Mayor Graff 

Adolph Nelson Graff (1874-1949) - Find a Grave Memorial 

South Dakota Legislative Manual - Google Books 

South Dakota Legislative Manual Volume 19 Page 293 Published in 1925 

Aviation 1936-02: Vol 35 Iss 2 : Free Download, Borrow, and Streaming : Internet Archive 

Argus Leader April 4th, 1949, Graff Obituary 

Argus Leader April 5th,6th, and 7th 1949 

Harold Tennant 

Harold W. Tennant (1896-1928) - Find a Grave Memorial 

f (sd.gov)  

Argus Leader August 8th, 1921 Tennant storing plane in garage 

Argus Leader May 6th, 1925 Tennant Altitude record attempt 

Argus Leader May 7th, 1925 Tennant Altitude record success 

Our History | Sioux Falls Regional Airport (sfairport.com)