Laserfiche WebLink
5.0 SURFACE WATER AND GROUND WATER INTERACTIONS <br />The interrelationship in concentrations of chemical parameters between the surface waters and <br />alluvial waters at the Edna Mine can only be suggested in very general terms. The primary <br />reasons for this are the relative location of a given well to the creek, the source from which an <br />alluvial well's water originates and the dynamics of alluvial flow. <br />Prior to 1995, a general trend evident in TDS and the major ions was that as one progressed <br />downstream along the mine an increase in these parameters occurred in both the surface water <br />and alluvial water. Beginning in 1995, the levels of all constituents in TR-1.5 increased <br />dramatically. While the influence of this increase in upstream alluvial water is not clearly <br />expressed in either surface or alluvial water downstream for the majority of the year, the elevated <br />concentrations of surface water constituents observed in the early portion of the year are more <br />pronounced than previously. This is probably a reflection of the co-mingling of alluvial water in <br />the vicinity of TR-1.5 with creek water upstream of TR-B. <br />The independent nature of the observations and trends occurring within the creek water and <br />alluvial water suggests the two water bodies have limited influence upon each other. The lack of <br />influence is probably due to the slow exchange rate of water between the two bodies during most <br />of the year. <br />???vVWCENGINEERING Page 16