HistoryDaniel Kennedy constructed the first gristmill along Slippery Rock Creek in 1852. Several years later it was destroyed by a fire and rebuilt in 1868. In 1875 Captain Thomas McConnell purchased the mill and replaced the water wheel and grinding stones with more modern water turbines and rolling mills. According to the DCNR website, it processed corn, oats, wheat and buckwheat for local customers. Eventually it closed in 1928.
When Captain Thomas McConnell died, the mill was passed to his son James McConnell. Since James had no children at the time of his death years later, the property was given to the grandson of Captain McConnell, Thomas H. Hartman. Wishing the area to be preserved for future generations, Thomas H. Hartman transferred ownership of the mill and land to the Western Pennsylvania Conservancy in either 1942 or 1946. McConnells Mill State Park was formally dedicated in October of 1957 and in May 1974 the U.S. Department of the Interior designated it a National Natural Landmark. Currently the park covers around 2546 acres and is considered one of the "Twenty Must-See Pennsylvania State Parks." The land is also designated as an Audubon Important Bird Area for its outstanding value to bird conservation.
Source and More Info:
Pennsylvania Department of Conservation and Natural Resources, Wikipedia, Great Natural Areas in Western Pennsylvania, National Registry of Natural Landmarks (PDF), Slippery Rock University - Online Rocket, Audubon Pennsylvania
This image was taken last Sunday in McConnells Mill during a walk with my wife. We then headed over to Moraine and happened upon a woman who had spent the last five hours looking for her two lost St. Bernards. I hope she found them.
I have been meaning to write a post about the covered bridge in McConnells Mill for some time. You can see the bridge in this image taken on a foggy September day.
I did not notice there was someone taking a picture in my direction at the same time. You can see him in the close up to the right.
Seeing that every good spot was taken for getting a clean shot of the bridge, I decided to make my way over to nearby 
There is actually a girl sitting on the top of the cliff! She is hard to see in the close up to the right, but trust me she is there.
She looked like she was posing for someone else with a camera.
At the bottom of the photo you can see the edge of
Slippery Rock Creek viewed upstream from the walkway by the Mill.





