Seepage bed of sewage disposal system, Circa 1970Great Smoky Mountains National ParkInstallation of sewage treatment tank, necessary utility connections, seepage bed, and a chlorination system adjacent to the maintenance complex in the headquarters area, Contract no. 1:133:654, Henderson Const. Co. Madisonville Tn. Seepage Bed Completed,Headquarters Sewage Disposal, II-U-Sewer-15575, Physical Facilities - Utilities - Sewer systems