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(3) Stream discharge measurements at the North Fork Lower station should be added to <br />the water quality monitoring program. Flow measurements should be recorded each <br />time a water quality sample is collected and should be done concurrent with a <br />measurement at the North Fork Upper station. <br />(4) The sediment that collects in the Lower Sylvester Gulch flume should be routinely <br />cleaned out, to enable accurate flow measurements to be taken. It is also <br />recommended that the procedures for taking measurements be verified, particularly <br />during periods of low flow. <br />(5) The silt fence located at the Train Loadout (east of MB-4) should be reconfigured to <br />face more upgradient and away from the North Fork Gunnison River. This will <br />increase its trapping efficiency. <br />(6) The Probable Hydrologic Consequences (PHC) section of the permit document does <br />not adequately assess the current groundwater inflow conditions being experienced <br />within the mine. This condition effects the surface water hydrology of the mine site <br />because mine inflow waters are being discharged to and treated in existing surface <br />water ponds. It is recommended that the PHC portion of the permit document be <br />updated and revised to include a characterization of the recent high volume mine <br />inflows. Mine inflow water and its disposition should be accurately documented. <br />2 <br />