AMP: 1 Location: Silver Valley Rd and Shields Gulch Rd, Osburn The I-90 Business Spur begins here as we enter Osburn and old US-10 gets visibly nicer. AMP: 0 Location: Mullan Ave and Fourth St, Osburn A mile or so later, we’ll enter Osburn and prepare to turn to head up to I-90 AMP: 0 … Continue reading Interstate 90 Business Spur, Osburn to I-90