AMP: 66 Location: US 212 and Otter Creek Rd, Powder River Cty A few miles later, we’ll enter Powder River County and approach S-484 AMP: 66 Location: US 212 and Otter Creek Rd, Powder River Cty Follow S-484/Otter Creek Rd down to Fort Howes and beyond.  E to MT-59, W to S-447  S to Otter Creek Rd … Continue reading U.S. Route 212, S-566 to S-484