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August 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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