National Geographic : 1950 Jul
© National Geographic Society 118 Kodachrome byWalter M.Edi\ards Turning Out at 7:30, Campers Find Coal Dredgers Already at Work; Air MattressesMade Concrete Soft asDown Seepage from mines, not lost cargoes, contributed millions of tons of coal taken from the Susquehanna. As mine owners now trytoprevent such wastage, dredgemen face a dwindling supply (page 115). Water here laps over York Haven Dam, Pennsylvania, and trickles down agutter. Thus thecampers remain dry.