My first guess was that perhaps these two blocks are just alleys, and therefore do not require a paved surface. However, these two blocks have several homes facing these gravel streets, something alleys do not usually have. These streets also have normal names and street signs, which is something else that alleys often lack. Even if these are alleys, one would think that the surface should be paved since there are multiple homes fronting each road.
|The 9300 block of Biltmore Drive. Photo by the author.|
|9400 block of Long Branch Parkway. This street it more "alley-like" than it's neighbor, Biltmore Drive, but it also has homes fronting it and it's own unique name and addresses. Photo by the author.|
After eliminating all those previous theories, the only one that remains is that these streets were left unpaved due to some sort of dispute between the developer of these parcels and the county.
When a developer builds a subdivision like this, they are often responsible for building the infrastructure themselves before turning it over to the county for future maintenance. The developer of this tract may have run out of money to pave the streets and build the associated stormwater management infrastructure (curbs, drainage pipes, etc). When the developer gave the new roads to the county, the county may have refused to pave the streets since it was a cost that the developer was supposed to cover, meaning the streets never got paved.
|Intersection of Long Branch Parkway, Dearborn Avenue, and Seminole Street depicting the beginning of the unpaved block of Long Branch Parkeay. Photo by the author.|