I need to make a correction. In one of the previous posts of our Infrastructure! series, I wrote:
In early 1841, before the commissioners approved county roads Nos. 1, 2, and 3, there was already one federal road in the county. The Green Bay road was a federal road […]. It ran generally south to north, joining Ft. Dearborn in Chicago to […] Ft. Howard in Green Bay. Along the way it passed through a number of growing settlements including the three villages that would become Milwaukee, and the future towns of Mequon, Cedarburg, and Grafton.
That’s almost accurate. To be precise, I should have said there was one federal road in the southeast corner of the county—the part that would become the towns of Mequon, Cedarburg and Grafton—the Green Bay road. But, if you consider the whole of old Washington county, there were not one, but two federal roads prior to 1841, the north-south Green Bay road and the east-west Dekorra road.
Both of these roads appear on the first map of Wisconsin Territory drawn from official government surveys, published in 1837. The two federal roads are indicated on the original map by closely-spaced parallel gray lines. On the detail below I’ve highlighted the then-existing eastern portion of the Dekorra road in blue, and the Washington county portion of the Green Bay road in green:









