2001-12-11_REPORT - C1980001

• Permit No: C1980001
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: AHR text and data
• Annual Report Year: 1989
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

expected that the cyclic nature of these parameters beginning to develop in
1989 will continue in the future with a buildup in concentrations occurring
during the fall and winter months with a flushing action occurring during the
spring and summer.
Bicarbonate (Figure 12) and sulfate (Figure 13) are beginning to show a
trend of topological change similar to that observed in the surface waters.
U
t
(TA-1
f th
il
i
bi
i
th
i
5)
b
i
h
ps
ream
.
s spr
ng,
car
onate
e major an
on w
o
e spo
s
t
sulfate concentrations increasing rapidly along the mine area resulting in an
equalization of the sulfate and bicarbonate components occurring downstream
(TR-3 and TR-4). This increase may be caused by the spoils spring discharge
where leaching of pyritic and organic sulfur occurs as the flow passes through
the spoils.
' Dissolved iron and manganese remained at low levels during 1989 as in
int
r
tin
that WR-1 contains the lowest values for
i
It i
g
prev
ous years.
s
e
es
these two parameters for the majority of the 1989 monitoring period (Figure
' 19). In both 1988 and 1989, a sharp increase in manganese concentrations are
noticed for the first portion of the annual monitoring period, at WR-1, with a
' significant decrease occurring by the end of the year. This may be a further
indication of an annual flushing which may be occurring in the spoils aquifer.
Orthophosphate (Figure 15) and nitrite (Figure 15) were added to the
' monitoring program in 1988. All values obtained during 1988 and 1989 for
these parameters were low with most being below detection limits (see
' appendix).
' V. Surface Water - Ground Water Interactions
' The interrelationship in concentrations of chemical parameters between the
surface waters and alluvial waters at the Edna Mine can only be suggested in
very general terms. The primary reasons for this are the relative location of
a given well to the creek, the source from which an alluvial well's water
originates and the fluvial dynamics of alluvial flow.
A general trend evident in TDS and the major ions is that as one progresses
downstream along the mine an increase in these parameters occurs in both the
surface water and alluvial water. while the trend appears in both waters, it
is not possible to determine to what extent the similar trends are related.
1
1