- Sanitary Sewers - Greenburgh NYA sanitary sewer construction project in the Town of Greenburgh, New York was undertaken during the Great Depression with the aid of federal Public Works Administration (PWA) funds. The PWA supplied a $60,000 grant; the total cost of the project was $237,942. Work occurred between April 1935 and May 1936. (PWA Docket No. NY 8827)