Note the highway sign in the phtot below. It notes the depth of the river water during the floods of 1965 and 1993. This causeway, as well as the MN-41 causeway (upstream) and the old Bloomington Ferry Bridge (downstream) are very quick to flood in high water. The new Bloomington Ferry Bridge was built above the 100 year flood line to prevent it flooding in the future. MN-DOT is looking at building a new freeway style river crossing over the Minnesota River between this bridge and the MN-41 causeway to prevent traffic from being blocked by future floods.
This section of road has been marked with several different designations over the years. It was US-169, until the Bloomington Ferry Bridge opened in 1996. From there, it was MN-101. MN-101 in Scott County was later turned back to county maintenance, so MN-101 ended at the county line. That means that the upper part of the causeway and the backchannel bridge in Carver Co are part of MN-101. The NBI, however, calls this section of road US-969D. In Scott County, maps differ on the main channel bridge being on CSAH-69 or CSAH-101, both of which are local county roads.
