Laserfiche WebLink
<br /> <br />Terrell Johnson 3 October 18, 1985 <br />This indicates that the bedrock aquifer is one fourth as permeable as the <br />spoils aquifer (309-bedrock vs 1330-spoils). This would explain why the <br />springs have developed in the backfilled spoils. <br />Although not predicted by CYCC the spoil spring phenomenon is common at other <br />mines in the 20 Mile Park including the Edna and Seneca Mines. <br />Bedrock/Alluvial Wells <br />Only one alluvial well was sampled by MLRD. Alluvial well S-5 was sampled and <br />analyzed for major ions. The results showed quality characteristics at or <br />slightly better than recorded by the operator's monitoring reports. <br />A review of the operator's monitoring reports indicated that some of the <br />bedrock wells downgradient of Eckman Park are showing signs of elevated TDS <br />and sulfate levels. This was predicted by CYCC in their application. Well <br />009-79-4 which is downgradient from the east end of Eckman Park shows elevated <br />TDS and sulfates beginning about spring of 1982. Well 026-79-4 which is <br />sightly ,farther from the center of the Eckman Park mined area started showing <br />elevated TDS and sulfates in the spring of 1984. Wells 026-79-6 and 79-7 <br />which are near the west end of Eckman Park which was more recently mined do <br />not appear to show any influence from the mine at all. <br />Alluvial quality on Fish Creek is significantly poorer downstream of the Mine <br />No. 2 (two) as compared to upstream. <br />TDS m /1 Sulfates m /1 <br />Fish Creek Upstream 006-AW-1 530 70 <br />Fish Creek Downstream 006-AW-2 3300 2200 <br />This could be due to influence from Mine No. 2 (two) runoff and spoils <br />discharge, bedrock groundwater discharge, or some other external influences. <br />A direct correlation to the mine is difficult since the sites are located <br />several miles apart without intermediate alluvial or spoils monitoring taking <br />place. <br />Alluvial wells S-5 and S-6 show elevated TDS and sulfate levels but without a <br />trend either up or down. These wells are along Foidal Creek near Mine <br />No. 1. (one) Alluvial Well 5-10 located downgradient from Eckman Park does not <br />show very high TDS or sulfates nor any defined trend. It is not clear how <br />much this well is influenced by the mine. The site is mapped close to the <br />undisturbed branch of Foidel Creek. There are no alluvial monitoring wells at <br />the base of the Eckman Park backfilled spoils that are being monitored. <br />Surface Water <br />Fish Creek monitoring upstream from Mine No. 2 (site 16) has showed fairly <br />consistant quality since 1979 with TDS and sulfates remaining low (TDS <br />300-500mg/1). The downstream Fish Creek surface water site (No. 26) does show <br />