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An early use of a core drill to check if it was worthwhile to open a quarry on a site. Before use of the drill came into operation, it was pretty often just educated guesswork where to site a new quarry.

If you look closely, you can see the men peering out through the damaged opening.

The timber crib dam south of Lehigh Gap that supported navigation on the Lehigh canal

Not exactly sure of the location of this view along the river.

Looking north. To the left of this bridge over the canal was the bridge over the Lehigh River that connected Slatington and Walnutport.

This photo is taken a bit further south of the bridge.

I think that this is looking south along the canal, below Walnutport.