1993-09-23_REVISION - M1977378 - Laserfiche WebLink

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SENT BY:Sunnyside Gold CorP 09-23-93 03:26PM 30338753104 303 832 8106 # 2 Responses to Division Concerns Page 6 They are 1) water monitoring and identification and 2) bulkhead performance. 1) Water Monitoring and Identification As suggested by the Division, SGC has implemented during 1993, a survey of seeps, springs and flowing adits to provide baseline water data for comparison against post- bulkhead conditions, if needed. The basic concepts employed which were discussed during your site visit to inspect the drainages are outlined below. The areas inventoried include: o the east side of Cement Creek and its north, middle and south forks along with Minnehaha Creek. o the west side of Eureka Gulch including the South Fork of the Animas River and McCarty Basin. o the east side of Eureka Gulch from Parson Gulch into Sunnysi de Basin. o Placer Gulch. o California Gulch. o Poughkeepsie Gulch. Tnese areas were inventoried between elevations of 10, 599 feet or the bounding stream bed and 12,200 feet (the maximum limit for the mine pool) for evidence of seeps, springs and flowing adits. Because of the heavy snow accumulation during the 92-93 winter, snowmelt conditions extended well into August making it difficult to differentiate between ground-water flow and flows fed by snowmelt. Differentiation was made by use of a conductivity meter and up-gradient inspection. At each site field measurements (PH, conductivity and temperature) were taken. Flows were measured using a portable flume, a pygmy meter or a beaker and stopwatch if flows were too small for the preceding flow measuring instruments. Samples were taken to be analyzed f or basic water chemistry, metals and bromide (to provide background levels for the tracer study, explained later) . Each sample site was located on a topography map (USGS 15' Quadrangle) f or the inventoried area and aerial photographs for those areas that photographs were available from SGC files. Study area boundaries were also placed on the topo maps and photographs.