1967 USDA-SCS Instructions: Staff and Planning Staff specialists concerned with planning watershed impoundment-type structures over or in the vicinity of mined-out areas or potential and active mine areas. We recommend that staff geologists use the Guide for developing geologic data: (1) To interpret structure foundation conditions; and (2) to facilitate establishing minimum limits for mineral rights. It also m y be helpful in preparing A&E contracts and negotiating with selected consultants.