Every road in Marengo, scored by condition.
What this map shows
In April 2021, an engineering firm surveyed every city-maintained road in Marengo and scored each segment on the Pavement Condition Index, a 0-to-100 scale. The city-wide average came back at 41. Most residential streets scored below 40. This is the most recent comprehensive survey available.
At the time, Marengo was spending $150,000 a year on road maintenance. The study projected that budget would let the average fall to 26 by 2031. Holding steady at 41 would cost $460,000 a year. Eliminating the backlog entirely: $2.5 million a year for ten years.
In March 2024, voters approved a 1% sales tax that generates $700,000 to $800,000 a year for road and sidewalk work. That clears the hold-steady threshold but falls well short of the full repair number. Some roads have been repaved since this survey. This map will be updated as new condition data becomes available.
The Pavement Condition Index is a national standard for measuring road quality. Engineers survey each segment for cracks, potholes, rutting, and surface wear, then weight each defect by type and severity. A score of 100 is a freshly paved road. Below 25 means the surface has failed and needs full reconstruction.
At 41, Marengo's average falls in the "Poor" range: widespread cracking and patching, with some segments past the point where resurfacing alone would help.