AMP: 328 Location: Main St and 400 S, Springville Reassurance shield after the SR-77 junction. AMP: 327 Location: Main St and State St, Springville A few blocks later, we’ll approach SR-51, which is old US-91. AMP: 327 Location: Main St and State St, Springville Keep right for 89 south to Mapleton and left for 51 … Continue reading U.S. Route 89, SR-77 to SR-51