Construction area of septic tank and leaching trench after clean up, Cable Mill Area, TennesseeGreat Smoky Mountains National ParkCompletion report photo. Construction area after removal of rocks, and completion of fine grading and general clean up.Cable Mill septic tank and leaching trench; Work Order No. B-52 GRSM, II-U-Sewer-7160, Physical Facilities - Utilities - Sewer systems