We found Feature 78 while testing our use of photographic overlay. Feature 78 is rectangular overall and is made of a series of shallow concentrations of coal and ash. These concentrations are probably the result of collection of coal and ash in shallow ditches that strikers dug around their tents. Taken as a whole the feature encompasses an area of approximately 6 m by 7 m, oriented 30 degrees W of Grid N. Feature 78 appears to be a tent platform like the one found in Locus 1.