 Paving was completed from Cloquet south to U.S. Highway 210 in 1939 as well and the remaining segment between U.S. 61 and U.S. 210 in 1940, making the route paved in its entirety.The highway was re-routed in 1948 to travel directly south from Cloquet and intersect U.S. 61 near that highway's junction with U.S. 210, shortening it by miles.When the portion of I-35 between Otter Creek and Scanlon was constructed in 1966, Highway 33 was shortened to end at the interstate, and upgraded to a four-lane divided highway from this new terminus into Cloquet.