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16, 1989
Westmin Resources Limited
Suite 904, 1055 Dunsmuir Street
P.O. Box 49066, The Bentall Centre
Vancouver, B.C., Canada V7X 1C4
604 681-2253 Telex: 04-51573
Telecopier: 604 681-0357
Dear Chris:
Westmin Resources used the Marland Model 300 Mine-Laser on its 1.9 km
exploration tunnel program between July, 1989 and March, 1989. It dramatically
simplified surveying work by reducing manpower to keep the miners on
line and reducing the surveyor's time to keep track of their progress.
Set-up was relatively simple even though the surveyor was not experienced
with the laser.
Miners' acceptance was very high; they liked having alignment control
on demand. The tunnelling contractor, Main Street Mining, used one of
your instruments on another job and was very happy to see us install
one on this job.
Reliability was very good under moderately rugged conditions.
We would use a Marland Mine-Laser again.
Sincerely,
Edward Lyons
Project Manager
November 20, 1990
CHENI GOLD MINES INC.
Mine Site
Bag 7000
Smithers, B.C. V0J 2N0
Tel: (604) 662-0140
Fax: (604) 662-0143
Dear Chris:
I would like to take this opportunity to express my sincere satisfaction
with your Model 400 mine laser. We have now had the unit for 5 months
and have used it in our 550' Alimak driven ventilation raise. We found
it very useful in this application. The raise was easy to keep on line
and as a result, broke through at the desired location. Once the raise
was completed, we used the laser to tope the raise and found it certainly
made that job very easy.
We are currently using the Model 400 in our ore pass raise. It is being
driven conventionally with a timbered manway. We have trained the miners
to set the unit up themselves and they are happy with it.
It is my opinion that the Model 400 is as useful in the drift as it
is in the raise. This versatility allows for the need for only one type
of laser for any straight tunnel driving activity. Our surveyors found
it very easy to set up and install. It was also very handy for toping
purposes.
Based on my experience with the Model 400 mine laser, I would recommend
it to any mining company interested in keeping long, straight drifts
or raises on line.
Yours truly,
Syd De Vries, P. Eng.
Chief Engineer
October 29, 1991
BARRICK
American Barrick Resources Corporation
HOLT-McDERMOTT MINE
P.O. Box 278
Kirkland Lake, Ontario, P2N 3H7
Tel: (705) 567-9251
Fax: (705) 567-6867
To whom it may concern:
The Holt-McDermott Mine has been successfully using Marland products
since 1987. We presently own two Model 300 mine-lasers that we use for
our long development drifts, which average 700 m. in length.
In August of 1991 we rented a third unit, the Model 400 mine-laser with
QCD Mount for raise applications. We used the unit to drive a 102 m.
Alimak raise at 52 degrees dip. The unit was mounted on the side wall
of the raise, as was the target. The Model 400 was very useful in the
raise and both
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the miners and the surveyors were completely satisfied with it's
performance.
I recommend Marland Mine Lasers to all in the mining industry and I
am personally looking forward to any new developments.
Yours sincerely,
Dan Rousseau,
Chief Surveyor
December 9, 1992
PLACER DOME INC.
DOME MINE
Box 70
South Porcupine, Ontario, P0N 1H0
Tel: (705) 235-3221
Telex: 067-81611
Telecopier: (705) 235-2343
Dear Chris:
I would like to thank you for the support you have given us over the
last year since the purchase of your model 400 mine laser. As you know,
we have had to reduce our survey crew due to economic constraints and
were looking for ways to perform the same work with less resources,
the use of the laser in our Alimak raises allowed us to do just that.
We have now successfully completed three raises, one at 730 feet, with
minimal survey control besides the initial setup. All have broken through
within feet of plan with the raise crew themselves checking their own
line and grade through the use of the laser.
It is refreshing to find a high technology piece of equipment which
is rugged enough for the underground environment and yet simple enough
to be used by non technical people. Once trained on the use of the instrument,
the crew themselves were pleased with its performance.
We have not used the instrument as yet in a drift, but are planning
to do in the new year as we have some long drives planned to connect
our no. 3 and no. 8 shafts.
During the upcoming development of the nearby Paymaster property, I
will have no hesitation in recommending the unit to the contractor due
to the length of their raises and its time saving capabilities. In closing
I would like to wish you a happy Christmas and a successful new year
in 1993.
Yours Sincerely,
Jack MacRory
Chief Engineer
January 23, 1996
WILLIAMS OPERATING CORPORATION
P.O. Bag 500
Marathon, Ontario, P0T 2E0
Tel: (807) 238-1100
Fax: (807) 238-1050
Dear Chris:
Since purchasing a Marland model 400 mine laser in October 1993, we
used the unit to control five Alimak raises and one Jumbo drift.
Raises:
The raises had an average length of 296 meters, ranging from 210 to
385 meters. Dips ranged from 65 to 79 degrees. Three of the raises were
circular with a 3 meter diameter. The other two were a 2.1 x 2.1 meter
square.
Drift:
A 300 x 4.7 x 4.5 meter shanty back Exploration drift with a + 3 % grade.
Results:
All projects were very successful with the development crews using the
laser to provide their own line and grade control. We found the model
400 mine laser to be very reliable and manageable, while saving time
and improving working conditions. The application of the mine laser
greatly reduced the risk of exposing Surveyors to open raises.
Raise program completed with great success. Every one loved the laser
(Senior Management, Surveyors, and the Miners).
Sincerely,
Joe Furlong
Chief Surveyor
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