Long time residents of Black Diamond, Judy and I love our community and the unique natural beauty and colorful history we have here. Join us in learning more about our history, local wildlife, must do hikes, conservation areas to explore and the opportunities and challenges faced by our community. Craig Goodwin

« Moths Can Be Beautiful Too! | Main | Milwaukee Magazine Circa 1927 - Railroad History On Display »

08/15/2013

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Davidw

I would imagine they would use standard survey equipment, such as transits and levels.

Craig

Thanks David. Not so sure that this is that simple, but am not schooled in these techniques. For example, the tunnel was very narrow. How do you get the north-south ordinants? As it turns out, from what another blog responder has indicated, there was a problem at the summit of the pass. A peak at the top, making it difficult for the train to get up and over. Will post more about this later. Thanks.

Bill Kombol

In the Rogers #3 coal mine near Ravensdale they had to blast a gangway to connect the Rogers #2. Rogers #3 drove north from the Kent-Kangley side while Rogers #2 came south from Summit-Landsburg. Our mine surveyor, Cameron A. Rich of Buckley, using mine maps compiled by Gordon Adderson and Dave Gray, would draw underground maps of amazing detail. The miners I spoke to marveled that when the two tunnels met they were within a foot or so of each other. Now admittedly it's easier to follow a coal seam, but stories were also told of rock tunnels in virgin driven cross seam also arrived exactly where they were predicted to. All this back in the day of hand equipment and slide rulers. Not sure how they did it, but they did.

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