Yes that was on the north side of the road. Didn’t see a quarry from the road on the south, but there was a large construction entrance.That quarry is located just west of Duntroon, at the top of the escarpment. It's on both sides of the road in that area. The photo looks like the pit on the north side. I drive by that area even time I go skiing at Blue. Here's a screen shot of the area from his map.
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Here we go: http://www.walkerind.com/wp-content/uploads/2013/12/FS_whyhere.pdf