1992-11-20_REVISION - M1977378 - Laserfiche WebLink

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SENT BY;SJCMV 04-06-93 03:23PM 3033875310-3 II I III I II I II IIII III 2 _ 999 STATE OF COLORADU cMow►oo uXPaRsMEW of HMni oen voon�rd:e nt p the � d �7- 3 7e ofhpof= a a3oo Or S. labordwy Bulldog Denier, sdo 90222-1S30 4210 E.111h Avenue Phowe 003)692-2000 Dearer,Colorado 80220.3716 n O z 1 0 0(13)6914700 .40vember 20, 1992 EMBOAQ Larry Perin ,,Superintendent - Technical Services Sunnyside Cold corporation P.O. Box 177 silvert�on, CO 81433 R8: ✓suspension of Permit Amendment an $unnys a Go - American and Terry Tunnels ceps Nos. CO-0027529 and CO-0036056 San Juan County Dear Mr. Perinos After conversations with you and with Jim Stevens of the Colorado Division of Minerals and Geology (CDKG), and after reviewing the Division files, we have determined that a decision on whether to authorise moving the discharge point for the American Tunnel permit (00-0027529) must be delayed until the CDKQ approves the hydraulic plugs. They have informed us that as part of their review process, they will review geological and hydrological information submitted by you with your design report in order to ensure that AU sources of water from your property will be permanently eliminated when the plugs are installed. They have indicated that they will not approve the project unless they are convinced that no water will be able to discharge down the tunnel from your property after the plugs are in place. it appears after talking with CDMG that if the plugging project is approved by them, it may also fully address our oancerM and therefore, relocation of the discharge point would likely be appropriate. As I am sure you are aware, some similar projects at other sites have not shown to be successful on a long term basis; therefore, until such time as this project is approved and we are satisfied with the review process, a decision from us regarding relocation of the discharge point would be prsmaturs. Additionally, you are probably aware that a reasonable period would be required after the plugs have been installed to demonstrate the long term success of this particular project prior to consideration of inactivation of your CDP8 permit. We will keep your amendment request on file and make a decision regarding moving the discharge point for permit CO-0027529 when CDMG approves the plugging. You expressed concerns about possibly violating the date for compliance with your whole effluent toxicity (waT) acute limitation due to a delay in completion of the plugging past June, 1993. You have stated that it is your goal to acheive compliance through cessation of all discharge. This course of action appears acceptable.