AMP: 0 Location: S-484 and US-212, Powder River Cty Reassurance shield at the beginning of S-484, which is actually paved for its first 20 miles. AMP: 10 Location: S-484 and 10 Mile Rd, Powder River Cty Reassurance shield after the 10 mile road, 10 miles south of S-484. AMP: 20 Location: S-484 and Tooley Creek Rd, Powder River … Continue reading Montana Secondary Highway 484, US-212 to Otter Creek Rd