Laserfiche WebLink
EFC1 Southfield Mine — 2014Annual Hydrology Report February 12, 2014 <br />In conclusion, the prevailing dry steam bed conditions in Newlin Creek are consistent with <br />monitoring observations during past monitoring periods, with the exception of spring runoff flow <br />conditions. In recent years the observed spring snow pack in the Newlin Creek watershed has <br />diminished and also melts -off earlier in the year, possibly contributing to the lack of observed <br />surface flow. Additionally, any potential springtime surface flow at the monitoring stations appears <br />to be intercepted by the Florence Reservoir and the entire flow diverted into the city water line. <br />Loadout Area <br />The current surface water monitoring program includes the following monitoring stations, shown <br />on Map 13, Loadout Monitoring Stations: <br />NPDES 001 WY2NW'�4, See 17 <br />NPDES 002 EYzNE' /4, Sec 19 <br />Pond L- 1(outfall to Chandler Creek) <br />Pond L-2 (outfall to Oak Creek) <br />The Loadout and adjacent areas fall within the lower sections of the Oak and Chandler Creek <br />drainages, both of which are tributary to the Arkansas River. Oak Creek is a perennial drainage <br />above the municipal well field for the Town of Rockvale. Dependent on water demand and <br />withdrawal levels for Rockvale, flows in Oak Creek below the well field in the 4.7 mile section <br />above the Loadout area may be either perennial or ephemeral. In areas adjacent to the Loadout <br />Area, flows in Oak Creek are fiequently ephemeral, and Chandler Creek is considered an ephemeral <br />creek (refer to Section 2.04.7 of the Southfield permit application for more details). <br />Oak Creek monitoring locations, both upstream and downstream, were eliminated in accordance <br />with approved Technical Revision No. 37. Oak Creek flow measurements made from 2000 through <br />2009, are presented for the two stream monitoring locations on Table 8. Stream flow data from <br />previous years are documented in AHR's on file at the Division and at EFCI's office. Additionally, <br />field and laboratory water quality data (prior to 2010) for surface water monitoring stations on Oak <br />Creek are documented in previous AHR reports on file at the Division. <br />Two sedimentation ponds, Ponds L -1 and L-2, were monitored through the reporting period. <br />Inspection of the ponds documented that each had little water, not much more than muddy bottoms <br />during the reporting period. Storm events in the Loadout area were limited in the amount of rain <br />produced. Both sedimentation ponds have, in the past, held only a small amount of water and have <br />never discharged to the stream system. Similarly, no discharge occurred as a result of storm events <br />during the reporting period. <br />Reclamation of Ponds L -1 and L -2 commenced in early October 2014. Kessler Reclamation <br />performed the backfilling and grading work which was finished by late November. According to <br />previous practice, the Division of Water Resources (DWR/WQCD) does not terminate the <br />associated discharge permits until they have an approved copy of the Final Bond Release from the <br />DRMS in hand. In the interim, EFCI will continue to submit quarterly Discharge Monitoring <br />Reports indicating "No Discharge ". <br />2014 AMR tULd= Page 20 <br />