Great Falls Park Monitoring

While at Great Falls Park on Sunday, I picked up a few frequency confirmations:

• 170.0500 [NAC 4C5] Great Falls Park
• 169.6875 [NAC 4C5] C&O Canal National Historical Park (This frequency was strong at Great Falls.  A reference to the "Monocacy Aqueduct" was monitored.  170.3625 [NAC 4C5] was active at same time, but much weaker.)
• 461.1625 [110.9] Madeira School (R)