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Short tunnel, watch out for ice in the winter.

Great spot to park. They recently added a porta John just 3/4 mile to the west across the Wv/Pa state line. Previously the next one was in Burgettstown or a half mile before the Harmon Creek trail head.

After the rain storm today there were lots of broken branches on the trail.

This is a good place to take a break on a hot day, as the waterfall produces cold wind. DO NOT DRINK this water, It is from an acid mine and the red-orange color comes from iron and rust.

The Montour Trail is a multiuse trail around Pittsburgh and is the country's longest suburban rail-trail. The trail is built on the former Montour Railroad.

The McDonald Trestle is a historic former railroad bridge, and is now a nearly 1,000‑foot long pedestrian and cycling viaduct on the Montour Trail.

Wet tunnel with water dripping from ceiling. Very cold almost icy.

S THE WATERFALL Demonstrating acid mnine drainage The water here is acid and iron-rich, coming up to the surface from underground mines, stairung the-rocks ruspred. Acid mine drainage (AMID) is a major source of water pollution. Cause of extensive stream environmental damage. The Ocean Coal Company, a subsidiaries of Bevind- White Coal Company Philadelphia, PA, esaiblished several mines in this region including, in 1900, Ocean No. 2. It is purported that drainage from ocean No. 2 is the chief cause of the Red Waterfall Why is it acidic and full of iron? Hundreds of millions of years ago, the massive Pittsburgh Coal Seam formed underneath parts of Pennsylvania, West Virginia, and Ohiờ from ancient swamp plants. Sand, silts, shells, and other -matter were deposited and made a rock seal over the carbon-rich vegetation, This rock contained the mineral "pyrite," made of iron and sulfur Coal mining exposes pyrite to oxygen and ground water causing the formation of sulfuric acid and a number of red, orange, and yellow compound s. AMD occurs when this mine water seeps, or in this-case, bursts out into Streams. The yellow sulfur can be seen in the shale near coal seams. GRESCHIN DASSAGE SPONSORED BY: Southwestern PA Heritage Breservation- Commission Allegheny Trail Alliances Regional Trail Corpofation For moterinformation. www.gaptrail.org