Most of Anderson sits on the glacial till plain of central Indiana, where federal soil surveys describe three common kinds of ground. Miami soils drain moderately well but hold a perched water table two to three feet down from December into April. Crosby soils stay wetter, with water as close as half a foot below the surface in winter and spring. Brookston soils fill the low spots and drain poorly, with the water table sometimes standing at the surface. A driveway built across that mix can be dry at the garage and saturated at the street, and the base has to be designed for the wet end.
Water arrives often. The long-running weather station at the Anderson sewage plant records 41.44 inches of precipitation in a normal year, with May and July the wettest months at more than 4.4 inches each. Winter brings about 19.6 inches of snow, and January's average low is 19.3 degrees. That combination is what breaks asphalt from below: water soaks into a thin or clay-fouled base in the fall, freezes, lifts the pavement, then leaves it unsupported when it thaws in spring.
The age of the housing stock compounds the problem. Anderson grew fastest during the decades when Delco Remy and Guide Lamp were the city's two largest employers, and a driveway from that period may have carried three surfaces since. Each overlay adds height at the garage and the street without adding support underneath. When fresh asphalt goes over a base that has lost its strength, the old cracks tend to reflect up through the new layer within a few winters, which is why a bid for an overlay can turn into a full replacement once the old asphalt is cut open and the stone below is examined.
Rules depend on which road the driveway meets. Inside the city, the City Engineer's office requires a permit, a bond and proof of insurance for any work on a private drive or sidewalk that sits in the road right-of-way, which covers most aprons and curb cuts. A drive onto a state route such as State Road 9 or State Road 32 needs an INDOT driveway permit, and INDOT calls for a culvert of at least 15 inches under private drives and field entrances unless it approves something else. County roads fall under the Madison County Highway Department, which maintains roughly 870 miles of roadway.
The city has been repaving its own streets. Anderson received a $970,000 Community Crossings grant from INDOT in 2024 to pave streets in the Greenbriar and Meadowbrook neighborhoods and Pearl Street south of 14th Street, part of about $11 million the city has drawn from the program since 2016. When a street in front of a house is milled and repaved, the grade at the gutter can change, and the driveway apron is the part of the private drive that has to meet it.
Beyond the city limits, Madison County is farm country with long lanes, field entrances and ditch-lined county roads. Gravel, recycled asphalt millings and tar and chip are common there because they cost less per square foot than hot mix over a long distance, and each needs a culvert where the drive crosses the roadside ditch. Before any digging for a culvert, grading or a new base, Indiana law requires a locate request through 811 at least two full working days in advance.