INSPEC03609

• Permit No: M1977342
• IBM Index Class Name: Inspection
• Doc Date: 8/25/2003
• Doc Name: Inspection Report
• From: DMG
• To: Climas Molybdenum Co
• Inspection Date: 8/11/2003
• Media Type: D
• Archive: No

MINE ID # OR PROSPECTING ID#: M-1977-342 PAGE: 2
INSPECTION DATE: 8-11-03 INSPECTOR'S INITIALS: ACS
A monitoring inspection of the Henderson Mill was conducted; the
following locations were inspected and observations made.
1. Construction of the haul road approved under technical revision
TR-13 is underway. At the time of this inspection, a large
percentage of the rough grading had been completed. Wick drains
constructed of clean gravel, perforated pipe, and geotextiles are
installed in wet locations. Cross culverts are installed at
drainages that can flow substantially in response to snow melt or
rainfall. The cross drain culvert at the West Fork of Ute Creek
was inspected and found to be correctly installed. Preparations
were underway for the installation of the temporary interceptor
canal crossing approved in TR-13. A large arch CMP culvert and
galvanized inlet and outlet aprons with wing walls had been
delivered. The culvert will be laid into a mucked out section of
the canal on existing canal grade. There will be several feet of
road fill compacted above the culvert. The terms of TR-13 require
an annual evaluation of the local snow pack and determination of
whether it is safe to leave the temporary culvert in place during
snowmelt. Topsoil encountered during the rough grading of the haul
road has been salvaged and temporarily stockpiled adjacent to the
road alignment.
2. No. 1-Dam was inspected. A crest line raise was completed in 2003
that will provide capacity for approximately four years of tailing
disposal. The seep water canal was cleaned in 2003, with the muck
being hauled around 3-Dam and dumped back into the tailing pond.
Three of the ground water interceptor wells were replaced in 2003.
The Office of the State Engineer required that the wells be
replaced. The new wells are under permit from the State Engineer
for both ground water recovery for aquifer remediation and as
industrial production wells to provide mill process water. No
blowing dust from the tailing impoundment was observed during this
inspection.
3. No. 3-Dam was inspected. The face of the dam was being graded
using a large excavator and a D4 CAT. The majority of the dam
face will be graded to no steeper than 3:1. At the east end of
the dam, sloping is constrained by the concrete tailing delivery
pipe at the crest of the slope and the seep water collection ditch
at the toe. Because of these constraints, a portion of the dam
face at the east end will be graded to between 2.5:1 to 2.8:1.
Following grading, five large (1.5 acres) vegetation test plots
will be constructed. The control plot will be constructed in
accordance with the approved reclamation plan, which calls for the
application of agricultural lime, spreading of an average 12 inch
thickness of topsoil, and seeding and fertilization with the