Q:

On May 26 and 27, 2009, Trindle Spring Run (locally known as Silver Spring Run), located in a highly urbanized portion of Cumberland County in the vicinity of the town of Mechanicsburg, was reexamined to evaluate the status of the naturally reproducing rainbow trout population. Trindle Spring Run, not unlike Letort Spring Run or Big Spring Creek also located in Cumberland Valley, is a low gradient, fertile, limestone spring stream. Trindle Spring Run begins its path to the Conodoguinet Creek south-southwest of Mechanicsburg arising from small spring sources in the limestone geology of the Cumberland Valley, and flows approximately 5.6 miles to its mouth. Portions of the stream flow underground between Mechanicsburg and Silver Spring. Aquatic plants common to limestone spring streams such as watercress and water-starwort provide cover for trout. The downstream portion of the stream from a spring source near the Silver Spring Meeting House downstream to its mouth (approximately 0.9 miles) supports a naturally reproducing population of rainbow trout, uncommon in Pennsylvania........................That's the first time I've ever heard of naturally reproducing rainbows in Pa. I'll be hitting that stream sometime in the future!!!