Watershed co6 in Coshocton County, Ohio, was instrumented in 1976 as one of three watersheds established for the purpose of investigating surface mining and reclamation effects on local hydrology, sediment discharge, and water quality. Each watershed occupied approximately 50 acres in a unique geologic setting within southeastern Ohio. Surface runoff and ground water levels were monitored. Samples were taken for sediment determination and chemical analysis prior to mining. Monitoring and sampling continued through the period of watershed disturbance caused by mining and reclamation activities, which began in November 1976. A postreclamation period that followed the cessation of worker-machine activity on the watershed began in October 1978 and continued to the end of January 1981.