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REP03467
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REP03467
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Last modified
8/24/2016 11:34:21 PM
Creation date
11/26/2007 10:31:43 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980001
IBM Index Class Name
Report
Doc Date
12/11/2001
Doc Name
1987 AHR text and data
From
PITTSBURG & MIDWAY COAL MINING CO
To
MLRD
Annual Report Year
1987
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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1 <br /> <br />sulfate is insufficient to shift the anion component to a sulfate type with <br />' concentrations of bicarbonate and sulfate being approximately equal at TR-D. <br />The nitrite/nitrate anion component (Figure 9) closely follows the same trend <br />as sulfate, but to a much lesser extent. The most probable source of readily <br />available nitrite/nitrate at the mine is the mulch used during the <br />revegetation process. <br />All of the detectable trace elements: iron (Figure 6), aluminum (Figure 7), <br />manganese (Figure 7), phosphorus (Figure 8) and zinc (Figure 8) show <br />' consistently low values since the fall of 1981, except during the rapid snow <br />melt which occurred during 1989. At that time, a dramatic increase in each of <br />these parameters occurred upstream of TR-A with significant dilution being <br />observed at each successive monitoring point along the mine area. The <br />dilution was caused by the low concentrations of these elements in water <br />' exiting from the mine. This same diluting effect is also expressed in the TSS <br />concentrations as previously mentioned. Dissolved iron and zinc also show the <br />rising and falling trend expressed in the TDS observations with peak <br />concentrations occurring prior to the spring runoff and dilution with the <br />higher flows. All the values observed from these elements, except May, 1984, <br />are consistent with the baseline values. <br />Other trace elements: arsenic (Figure 9), selenium (Figure 9), and mercury <br />(Figure 10) have remained below detectable limits with a few exceptions <br />' occurring prior to 1984. These values suggest potential contributions from <br />these elements to Trout Creek water quality from mining activities are not <br />evident. <br />' The general characteristics: pH (Figure 11), electrical conductivity <br />(Figure 11), temperature (Figure 12) and dissolved oxygen (Figure 12) exhibit <br />' the same trends as found during the baseline studies. Trout Creek remained <br />alkaline throughout the year with slight variations in pH occurring <br />' seasonally. Electrical conductivity shows the same trend as TDS, as expected. <br />Temperature follows the seasonal trend established during baseline and <br />' dissolved oxygen remains near saturation. <br /> <br />1 <br />
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