40 44' 00 N
75 32' 41 W

Triechler’s Bridge allows traffic on Route 145 to pass over the Lehigh River.

The southern part of the Lehigh River Watershed is composed of the Allentown Formation. The Allentown Formation covers 83 square miles and is composed of magnesium limestone. The limestone plays an important role in maintaining the water quality of the river.

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