Dear troutbert,
Don't let the limestone geology of Centre County affect your thinking. While the streams of the Cumberland Valley definitely flow through limestone geology, the difference is that the valleys are VERY WIDE in Cumberland County.
There realistically is literally ZERO opportunity for extensive housing development to occur on the streams you mentioned. I realize that Spring Creek has changed much over the last 25 years, but the stream corridor itself has been largely undisturbed. If you waded Spring Creek from the bridge in Lemont coming into town to the Paradise, the stream bank is essentially what it was when I graduated PSU in 1982. Rockview has been a great insulator. Penns and the Little J are pretty much not realistic areas for any development except for the odd home or cabin.
In contrast, the Cumberland Valley yearly sees several hundred, maybe even thousands of acres of former farmland converted to warehouses, homes and townhomes, and the bad word Data Centers. Everything coming off those developments finds its way to the streams. There are still 10's of thousands of flat farmland acres left in the Cumberland Valley to be destroyed.
Regards,
Tim Murphy 🙂