would design, build and maintain trunkline bridges spanning or more so long as the local governments improved an adjacent of roads. Marquette County built a mainline road from Marquette west to Michigamme near the county line, this road generally followed what is now known as County Road 492 (CR 492). About west of Marquette on CR 492 is a historical marker at the site of the first center line painted in 1917 along Dead Man's Curve. M-15 continued through Morgan Meadows and crossing the Carp River into the town of Negaunee and connecting with Ishpeming. This road in now known as East Division or "County Road" also former Business M-28. West of Ishpeming in Ishpeming Township, M-15 followed Randal Drive and Westward to North Lake Junction. M-15 made its way along what is now CR 496 and several abandoned sections through Clarksburg and Humboldt Locations and the village of Champion. West of Champion M-15 continued to Michigamme crossing the Peshekee River, Marquette County improved a section in 1913 to encourage the state to build the bridge. The bridge was designed by C.V. Dewart for the department and built by the local firm of Powell and Mitchell in Marquette. The bridge was designated Trunk Line Bridge No. 1 as the first state-built bridge on the trunkline highway system. The 1925 draft plan for the establishment of the US Highway System would have replaced M-15 with three different US Highways. Between Menominee and Powers, M-15 was to be replaced by US 41. East of Powers to Rapid River, the trunkline would have been US 2. The next segment between Rapid River and Humboldt was planned as US 102 while the remainder north to Copper Harbor was not numbered as a US Highway. When the system was announced on November 11, 1926, US 41 was the only US Highway routed along the alignment of M-15. The original map showed US 41 following an unbuilt alignment between Powers and Marquette, but the US 41 designation was instead routed to follow the former M-15. Current designation The current routing of M-15 was designated after 1926. The southern end was located at US 10 in Clarkston running north to M-38 and M-24 in Vassar. By the end of 1936, M-15 was extended concurrently along M-24 from Vassar into Bay City. By June 1942, the M-24 concurrency was removed as M-24 was realigned to replace M-85 between