President Roosevelt articulated six principles for the WPA:
1. The projects should be useful.
2. Projects shall be of a nature that a considerable proportion of the money spent will go into wages for labor.
3. Projects will be sought which promise ultimate return to the Federal Treasury of a considerable proportion of the costs.
4. Funds allotted for each project should be actually and promptly spent and not held over until later years.
5. In all cases projects must be of a character to give employment to those on the relief rolls.
6. Projects will be allocated to localities or relief areas in relation to the number of workers on relief rolls in those areas.
Franklin D. Roosevelt, April 28, 1935 “Fireside Chat”