2014-11-04_HYDROLOGY - M1988112

• Permit No: M1988112
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/4/2014
• Doc Name: San Luis Project Tailing Dam Annual and 3rd Quarter Reports.
• From: Battle Mountain Resources, Inc.
• To: DRMS
• Permit Index Doc Type: Hydrology Report
• Email Name: WHE
• Media Type: D
• Archive: No

DAM NAME: San Luis Tailinit Dam
DATE OF REPORT: 05/15/14
GUIDELINES FOR DETERMINING CONDITIONS
CONDITIONS OBSERVED - APPLIES TO UPSTREAM SLOPE, CREST, DOWNSTREAM SLOPE
GOOD
ACCEPTABLE
POOR
In general, this part of the structure has a
Although general cross - section is
Conditions observed in this area appear to threaten the safety
good appearance, and conditions observed
maintained, surfaces may be irregular,
of the dam.
in this area do not appear to threaten the
eroded, rutted, spalled, or otherwise not in
safety of the dam.
new condition. Conditions in this area do
not currently appear to threaten the safety
CONDITIONS OBSERVED - APPLIES
TO SEEPAGE
GOOD
ACCEPTABLE
POOR
No evidence of uncontrolled seepage. No
Some seepage exists at areas other than the
Seepage conditions observed appear to threaten the safety of
unexplained increase in flows from designed
drain outfalls, or other designed drains. No
the dam. Examples:
drains. All seepage is clear. Seepage
unexplained increase in seepage. All
1) Designed drain or seepage flows have increased without
conditions did not appear to threaten the
seepage is clear. Seepage conditions
increases in pool level.
safety of the dam.
observed do not currently appear to
2) Drain or seepage flows contain sediment, i.e., muddy water
threaten the safety of the dam.
or particles in jar samples.
3) Widespread seepage, concentrated seepage, or ponding
appears to threaten the safety of the dam.
CONDITIONS OBSERVED - APPLIES TO
MONITORING
GOOD
ACCEPTABLE
POOR
Monitoring includes movement surveys,
Monitoring includes movement surveys and
Instrumentation and monitoring described under
leakage measurements, and piezometer
leakage measurements. Instrumentation is
"ACCEPTABLE" here are not provided, or required periodic
readings. Instrumentation is in reliable,
in serviceable condition. A plan for
readings are not being made, or unexplained changes in
working condition. A plan for monitoring the
monitoring instrumentation is in effect by
readings are not reacted to by Owner.
instrumentation and analyzing results by the
owner. Periodic inspections by Owner or
owner's engineer is in effect. Periodic
representative.
ins a ti ns bv Owner's eneineer.
CONDITIONS
OBSERVED - APPLIES TO MAINTENANCE
AND REPAIR
GOOD
ACCEPTABLE
POOR
Dam appears to receive effective on -going
Dam appears to receive maintenance, but
Dam does not appear to receive adequate maintenance. One
maintenance and repair, and only a few
some maintenance items need to be
or more items needing maintenance or repair has begun to
minor items may need to be addressed.
addressed. No major repairs are required.
threaten the safety of the dam.
OVERALL CONDITIONS
SATISFACTORY
CONDITIONALLY SATISFACTORY
UNSATISFACTORY
The safety inspection indicates no
The safety inspection indicates
The safety inspection indicates definite signs of
conditions that appear to threaten the
symptoms of structural distress
structural distress (excessive seepage, cracks, slides,
safety of the dam, and the dam is
(seepage, evidence of minor
sinkholes, severe deterioration, etc.), which could lead
expected to perform satisfactorily
displacements, etc.) which, if conditions
to the failure ofthe dam if the reservoir is used to full
under all design loading conditions.
worsen, could lead to the failure of the
capacity. The dam is judged unsafe for full storage of
Most of the required monitoring is
dam. Essential monitoring, inspection,
water.
being performed.
and maintenance must be performed as
a requirement for continued full storage
in the impoundment area.
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