When the original state roads were built, the state of Indiana created a road that connected Indianapolis to Rockville, via Danville. That road, still known today as Rockville Road in Marion County, is almost as straight as any road can get in this state. However, there were places where straight just wasn’t possible. Such a place is in Putnam County.
It should be noted that there were two things at play when it came to the building of the original state roads. First, the construction was done to keep costs to a minimum. There was no need to cat a path through a hill when one could just go around it. Path of least resistance was the motto of the day. Second, as a general rule, the state didn’t tend to take people’s property to build a road that would just be turned over to the county after it was built. This is one of the reasons that a road connecting two towns in early Indiana didn’t always go directly between two points. While it isn’t as noticeable on maps today, a quick glance at older maps shows the curvy way someone got from point A to point B in the early days of the state.
The Rockville State Road was (mostly) built along a section line, meaning very little property would have to be taken to create it. Generally, property lines in Indiana tend to work along the survey lines. Survey line separate townships, ranges and sections. Most of the time, property was purchased in one section or another, usually not crossing the section line. But there were several places that the old road did have to venture off of the survey lines beaten path.
One was east of Danville. Main Street through the city was the original Rockville State Road. When a short bypass between Danville and Avon was built, the old road was kept in place, but turned slightly at both the western and eastern ends. The following Google Map snippet shows the old property lines when it came to the western (Danville) end of old Main Street/SR 31/US 36. Main Street turns southwest, while the old property lines turn due west to connect to Danville itself.
The other section was a much larger bypass built by the state in 1933. East of Bainbridge, the old state road took a dive to the south of the survey line…sometimes venturing almost a mile south of the line itself. The following map is from 1911, showing the postal routes that were followed at that time, and showing the old Rockville State road in its original alignment.
As shown on the map, going west to east, the old road started turning southeastward in Section 12, continuing further southeast in Section 7, and hitting its southern most point in Section 8. From there, it worked its way back northeastward until it reached the section line again in Section 10. This created a variance from the section line that was nearly four miles long.
Editor’s Note: As is typical of the original surveys, sections along the western edge of the range [sections 6, 7, 18, 19, 30 and 31] are smaller than one mile wide. The Range Line between those sections listed above, and sections 1, 12, 13, 24, 25 and 36 of the range west, is known as a correction line. This can be spotted throughout the state, not only by the less than one mile wide sections, but the occasional deviance from a straight line going west to east. In Marion County, Shelby Street and Franklin Road are those correction lines…and looking at the roads crossing them shows the correction. The survey line along the north edge of the map is the township line, separating survey townships 15 North and 16 North. Following that line to the east, it becomes part of the Danville State Road in eastern Hendricks County, 10th Street (the geographic center) through Marion County, and the numbering center of Hancock County. It is also a correction line in the surveys, so sometimes survey lines jog a bit when crossing it as well.
This section of the old road was very curvy, narrow, and did not lend itself well to the pending explosion of traffic that would be coming its way with the creation of the Auto Trails and, later, the State Highway System. When the Pike’s Peak Ocean to Ocean highway was created, it followed the old Rockville Road from Rockville to Indianapolis. Thus, it followed this curvy, winding line through Putnam County.
Things would change in 1933, when the Indiana State Highway Commission announced that construction would begin on US 36 from Danville to Bainbridge. This project would complete the straightening of the federal highway from west of Indianapolis to the Illinois-Indiana State Line. The Indianapolis Star of 1 April 1933 reported “a twenty-five mile detour from Danville to Bainbridge on United States Road 36 over pavement and dustless type road has been established to take care of traffic pending completion of new pavement between Danville and Bainbridge which will complete the project from Indianapolis to the Illinois state line.”
The above Google map snippet shows the exact same area as covered by the 1911 USPS map shown above. The route of US 36 through the area, shown in yellow, is the 1933 bypass built by the ISHC. The old road is still very narrow and winding, but still can be traveled to this day. The Indiana Official Highway map of 1933 shows the new road under construction, with the old road removed from the map. By the time the next official map was released for June 1934, the new road was completed and opened. The following is the 1936 survey map of Putnam County roads, including road width, constructing materials and bridge of the same area.
The new roadway included bridges marked as AS, AT, and AU on this map. The old road included CN, CM, CH, CG, and CK. (Note, they are marked on the map in lower case letters. I am using upper case to denote them since it is easier to read.) Both AS and AU were built 24 feet wide, while AT was built 20 feet wide. All three had a safe working load of 20 tons.
The old road’s bridges were a bit more complicated. CN was 12.7 feet high, 12.7 feet wide, and had a safe working load of three tons. CK was 16 feet wide and could handle 15 tons. CM was 19.5 feet wide, with a working limit of 20 tons. This would make it almost equal to the bridge that replaced it (AT), only being six inches narrower with the same work load limit. Both CG and CH were 20 feet wide with a 20 ton safe load limit.
The old road, according to the figures on the 1936 map, had a right-of-way 40 feet wide. The new US 36 through the area had a right-of-way of 60 feet in width. Most of the county roads in the area had a right-of-way narrower than the old Rockville State Road, usually less than 10 feet.
The other part of this realignment project was through Bainbridge itself. The old road traversed the town along Main Street. The new road bypassed Main Street to the north…by only one block. It still does to this day.
Jim Grey, on his old web site, covers the sections of the old road that connect to the current US 36 fairly well. That page is at: http://www.jimgrey.net/Roads/US36West/04_Bainbridge.htm. I think I have read somewhere that this website will be migrated over to his WordPress blog, “Down The Road.” If this is the case, get it while you can. And who knows, maybe after all the “stay at home” mess is over, I might make a trip out to this section of the old road to take some onsite surveys. (I would love to say take pictures…but my lack of photography skills is only surpassed by my complete lack of patience to take the time to make them good. Not gonna lie here, folks.)
Indiana Transportation History 
The alignment east of Bainbridge is truly fascinating and a good insight into what the 1920s highways were like. They had little choice but route them over existing roads, of course, which meant accepting whatever infrastructure was already in place. In this case, that meant routing a US highway over a wooden covered bridge.
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