Photograph of an UNIDENTIFIED man on a Sheepsfoot roller compacting fill material during construction of core trench and embankment at Barnitz Creek Site 19. Three UNIDENTIFED people stand off to the left side of the trench. A fourth UNIDENTIIFED person is sitting on a tractor on the left side of the trench. The back of the photograph proclaims, "Sheepsfoot roller providing ground-bearing pressures of 200 pounds per square inch used in compacting fill material during construction of core trench and embankment."