This feed is hosted using a Uniden BCT15X & Scannercast on Windows 10.

Nittany & Bald Eagle Railroad CH 1: 160.5900MHz
Nittany & Bald Eagle Railroad CH 2: 161.0400MHz
Norfolk Southern Pittsburgh Division AAR 51 Road/DS: 160.8750MHz
End Of Train Device: 457.9375MHz (See below)
Head Of Train Device: 452.9375MHz (See below)

This feed scans the Head of train and End of train device frequencies. These will sound like data chrips and indicate a train passing. The feed is located near Bald Eagle, PA (MP 5.0 or BALD on the N&BE). 

Theres about 5 trains that take the Nittany & Bald Eagle, not including the ocassional but rare BHRS Excursions. Below is a list.
NBER4: Bellefonte, PA - Tyrone, PA Turn (Nittany & Bald Eagle)
NS 60T: Bensenville, IL (CPKC) -  Williamsport, PA (Westbound Loaded Sand)
NS 61T: Williamsport, PA - Bensenville, IL (CPKC) (Eastbound Empty Sand)
NS 60I: Huff Power Plant, PA - Williamsport, PA (Loaded Gypsum)
NS 61I: Williamsport, PA - Huff Power Plant, PA (Empty Gypsum)