1993-09-24_REVISION - M1977378 - Laserfiche WebLink

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Responses to Division Concerns Page 12 6. Public Notification and Filing with the County Clerk SGC will provide documentation that the required Public Notice was published in the Silverton Standard and the Miner and that all owners of record of surface rights to the affected land and all owners of record of lands that are within 200 feet of the boundary of the affected land will be sent copies of the Public Notice by return receipt as well as the San Juan County Board of County Commissioners. The "affected lands" are interpreted to mean the permitted areas for the American Tunnel , Terry Tunnel and Sunnyside Basin. A permanent filing will be made with the San Juan County Clerk and Recorder after approval of TR-14 . 7. Removal of Underground Equipment, Facilities and Materials SGC will inspect the accessible underground workings and remove materials that may serve to contaminate the mine pool ( ie transformers, light fixture ballasts and stored fuel , oil or grease) . 8 . Potential for Failure from Thrust Strength related concerns were addressed and approved with the June 4 , 1993 submittal requesting partial approval of TR-14 for construction of the F-Level and B-Level Brenneman bulkheads . The American Tunnel and Terry Tunnel bulkheads are the same design and SGC assumes the design and strength concerns have been adequately addressed with that submittal . SGC will submit long sections of the bulkhead sites after cleaning to provide assurance that adequate perimeter area irregularity exists with no adverse tapering that will affect the bulkhead ' s capacity for shear resistance. 9. Diversion Pipe Flow Data The time interval that the stability of the bulkhead could be compromised by the by-pass flow exceeding its capacity is relatively short. This time interval extends from the start of pour until the concrete has cured approximately 3 days. After that time interval , the concrete will be strong enough to withstand any conceivable force that may develop from water head building up behind the bulkhead with an open valve. The capacity of the pipe will also increase or decrease depending on head available at the bypass pipe entrance and will have to be evaluated in that light.