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HYDRO27900
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HYDRO27900
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Last modified
8/24/2016 8:47:15 PM
Creation date
11/20/2007 8:36:42 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977424
IBM Index Class Name
Hydrology
Doc Date
9/2/1996
Doc Name
LOGAN WASH SURFACE WATER MONITORING AND DATA ANALYSIS PLAN
Media Type
D
Archive
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lined pond, the lined pond and spillway appurtenances, and the potential receiving streams <br />including the unnamed drainage downstream from the pond and Roan Creek. Existing <br />monitoring equipment and instrumentation within the system was also inspected as part of this <br />reconnaissance. <br />Oxy is planning to combine the dischazges from Outfa11001, Outfa11002 and the pipeline <br />discharge into 1 combined permitted outfall. This would allow the facility to determine the <br />quality of the water which would eventually be discharged to Roan Creek. The water from the <br />combined discharges would enter the evaporation pond and would not be dischazged without <br />prior state approval. <br />To meet the objectives of this plan, data aze required for the mine discharge and receiving <br />surface waters. This plan includes both flow and water quality data to document the volume <br />and quality of water expected in the process and receiving waters. The following monitoring <br />locations were identified to meet the objectives of this plan: <br />• Pipeline dischazge at outfall to pond, Station P-1 <br />• Lined pond at spillway, Station POND-1 <br />• Unnamed drainage at highway near mouth, Station UN-1 <br />• Roan Creek above Logan Wash below Conn Creek, Station RC-1 <br />• Roan Creek near mouth at the town of Debeque, Colorado, Station RC-2. <br />Monitoring locations aze shown on Figures 2 and 3, Logan Wash Mine Surface Water <br />Monitoring Locations, maps 1 and 2. <br />A flow recorder exists on the buried pipeline approximately 150 feet upstream from the pond. <br />This recorder is in operable condition and should be used for continuous flow measurement <br />which represents inflow to the pond. Water quality samples should be collected from this <br />manhole to represent water quality entering the pond. <br />The pond water should be sampled to determine water quality changes between the influent <br />stream and the pond spillway or potential outfall location. The potential exists for significant <br />changes in pond water quality depending on residence times. <br />The unnamed tributary downstream from the pond which would receive potential discharges <br />from the pond is ephemeral. There was no flow in this tributary at the highway (above Roan <br />7 <br />
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