This is from a 2014 Time article called “War on Poverty in the Pages of LIFE: Portraits From an Appalachian Battleground, 1964” which (as you would expect from an article focusing on LIFE magazine) has a number of interesting photographs. This particular one has the description:

Caption from LIFE. “On a wintry afternoon in Line Fork Creek a family trudges across a rickety suspension bridge over a sewage-polluted stream to its two-room shack.” John Dominis—Time & Life Pictures/Getty Images