INSPEC02802

• Permit No: M1980244
• IBM Index Class Name: Inspection
• Doc Name: MINERALS PROGRAM INSPECTION REPORT
• Inspection Date: 8/14/1994
• Media Type: D
• Archive: No

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MINE ID # OR PROSPECTING ID # m-80-244
INSPECTION DATE 08 14-94 INSPECTOR'S INITIALS
OBSERVATIONS
The Division conducted an inspection of the Bite on 8-14-94.
Purpose of the inspection was to make sure the severe rainfall
that occurred in the area the night before did not cause a problem
in the construction of the Arequa gulch underdrain
Present during the inspection was Dave Dix of Golder and Associates
Before the inspection a brief discussion was held with Mr. Dave Dix
about the intensity of the storm the night before and what if any problems
were encountered.He stated that no problem other than the usual runoff and
alight sediment was observed from the storm.
We drove to the underdrain area.There was evidence of sediment from the runoff
around the material stockpile area.
The entire underdrain from the toe berm to the maximum upstream area of
the underdrain waa walked and inapected.Operator has contracted a lined sump
north of the toe berm embankment. The two twenty four inch pipes were discharging to
this sump. The discharge from the corrugated pipe appeared to be milky[which
indicates sediment load] the discharge from the other twenty four inch pipe
was clear. There was no discharge coming out of the four inch pipe.
Liner installers from Gundle were installing the upper BOMIL.VLDPE liner
above the toe berm.
Some sediment was noted in the inside Geotextile from runoff which the
operator's representative was notified to pull the 80 MIL.liner and either remove
and replace the contaminated geotextile liner,which he agreed to do.
The mid point of the underdrain from the toe berm,a small excavator
with hammer attachment was breaking underdrain rocks exceeding 12"
Inspected the finger drains looking up stream the two finger drains
that are not tied to the main underdrain were holding some water
which was gradually seeping along the side of the main underdrain.
Once they are tied to the main underdrain they should function as
designed with no head build up.
The upper portion of the main underdrain was being filled with
with up to 6"of select fill at the time of the inspection.
Inspected the lined sump right below the Arequa Gulch main underdrain
The purpose of this lined sump ie to protect the three main pipes from
filling up with sediment.A decant riser was placed in the middle of
the sump to facilitate the flow and avoid sediment from entering the
three pipes and causing problem.The sump appeared to be functioning as
designed.
Operator had also placed straw-bales to control erosion up stream of the sump.
No major problem associated with the storm was noted.
I 6 E Contact Address
NAME John Hardaway
OPERATOR CC&VG
STREET P.O.BOX 191
CITY/STATE/ZIPVictor Colorado 80860
cc: Carl Mount
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