APPCOR11165 - Laserfiche WebLink

Home Browse Search

drainageways. Design information should be ultimately submitted for each disturbed drainage showing estimated discharge, flow volumes, channel specifics including lining, shape, etc.. Numerous locations within the proposed disturbed area of the Yoast permit are interrupting major ephemeral drainages, The success of the reclamation will ultimately depend on the performance of these drainage channels within the large framework of the post-mining topography. 5. Spring monitoring, proposed monitoring times, etc. I spoke with Dennis Jones of SCC by phone on June 22, 1995. He informed me that they almost always complete their required May/June groundwater sampling in May of each year. It is his understanding that June was listed for those rare occasions of weather or access and he understood our desire for a semi- annual sample to show seasonal variations if they exist. I am satisfied that we can drop this issue for now but should re- visit the issue should SCC begin to collect samples on a regular basis throughout the month of June. He also informed me that the springs that they had proposed not to monitor were for the most part 'wet spots' and after checking the baseline data collected I agree. If, however, springs of significance in the field are identified, they should be included immediately in the monitoring program. This includes spoil springs as well as springs/ponds in the undisturbed, adjacent area. 6. Flow and level in Tables 15-4 and 15-5 I spoke to Dennis Jones about this and he explained why they have done it this way. I am satisfied that the way they currently have presented this information is fine. 7. Spoil spring discharge estimates per disturbed acre. SCC provided the Division with their estimate of spoil spring discharge per disturbed acre for the Yoast mine via a phone conversation on June 22, 1995. As you can see from the table below, their value falls within an acceptable range based on past evaluation done by the Division. CHIA estimate (low flow) .0001594 DMG Yoast estimate .0002877 SCC Yoast estimate .0005412 Chia estimate (High flow) .0029850 Unless their are substantial errors in their calculations, I believe that the information within the PHC with regard to salt loading is reasonable and should be accepted. Review of monitoring data and comparison against this prediction will indicate if any changes or modifications to the PHC are necessary over time. If you have any further questions, let me know.