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Red Canyon 1991 AHR Review Page 2 AHR Review Frequency: The required frequency of monitoring all surface and ground water sites has been met. Red Canyon's monitoring requirements can be found on page 144 and 144a in the permit application. Technical Revision 6, approved September 5, 1989, reduced much of the monitoring requirements. However, all piezometers and surface sites are still in place should they ever be needed to replace current sites. The new monitoring program went into effect for the 1990 Water Year. Surface Water Ward Creek: Upper and Lower Ward Creek are monitored for flow and field measurements in May and September. Flows and conductivity for Ward Creek since 1983, can be found on Table 1. The average for historical flow measured at Upper Ward Creek is 38.1 cfs and during~ater year was 12.3 cfs. This decrease has been explained in the AHR as being related to the drier conditions during the last few years at the site. This is acceptable, however, there is no climate data available in the AHR. In the AHR, the operator makes comparisons between the flow for the month and monthly average. Seasonal flows are evident, with the high flow in May and low flows in September. However, a conclusion about impacts is hard to make because of the fact that readings during May are taken at different times; before, during, or after runoff. Flow readings taken during September at Lower Ward Creek has increased during the last three years. Conductivity during May and September and flow during May, shows no recognizable pattern. Impact: There appears to be no impact to Ward Creek from mining. Springs: Springs 1 and 3 are monitored for flow and field measurements in May and September. Spring monitoring data since May 1987 can be found on Table 2 and historical data can be found on Table 2A. Springs 1 and 3 are monitored to note affects, if any, on the glacial-alluvial aquifer of Ward Creek and affect its quality. Spring 1 is bedrock controlled and Spring 3 is controlled by the alluvial/colluvial flow system. It is possible that water from the flooded mine workings will discharge into this aquifer and affect its quality. Spring 1's average flow of 14.9 gpm is consistent with the historical average of 14.5 gpm. The current flows are more consistent, while the historical data jumps around. There is not enough current data for specific conductivity to make a conclusion, however the average (706 mmhos/cm) is