

Union County, IN Contractor directory
Excavation contractors in Union County, IN
5 verified excavating and site work contractors serving Union County.
County excavation guide
Ground conditions and project requirements in Union County
Use this local research to understand soil, seasonal constraints, permits, and jobsite logistics before choosing a contractor.
Skip to 5 contractorsIndiana Glaciated Till Plain & Moraine Loams
Indiana's glaciated two-thirds is a quiet place to dig: thick Wisconsinan till of silt loam and loam over gently rolling ground, deep enough that bedrock stays out of most ditches in the central counties. The upper profile trenches fast with a standard backhoe, and conventional septic systems dominate. The recurring issues are water-related: hydric soils and seasonal high water tables show up in the northeast lake-and-marsh belt (Allen, Kosciusko, LaGrange, Steuben) and the Kankakee and Grand Marsh remnants in the northwest, where seasonal perched water and mottling push systems to fill-based or mound designs. Northern Indiana's glacial lake plain adds fine sands and silts that cut cleanly but stand poorly: trench shoring matters. South of the National Road the till thins and bedrock rises: Mississippian and Devonian limestones lie within a few feet in the central counties (Marion, Hamilton, Hendricks), so rock is a moderate rather than rare cost. Shrink-swell is consistently low (under 2 percent in most counties), slope is minimal across the north, and the practical site questions are depth to water, depth to rock, and spring mottling: all routine soil-and-site evaluation findings.
Physical Ground Conditions & Soil Properties
High likelihood of bedrock refusal; hammer / ripper required for deep utilities.
Low volumetric expansion risk in native subgrade.
Shallow water table; active dewatering or sumps needed for deep trenching.
Indicates poor natural drainage and potential jurisdictional wetland pockets.
Predominantly gentle to rolling slopes suitable for wheeled earthmoving.
High rate of conventional drainfield limitations; engineered or drip systems often required.
Earthwork Regulations & Permit Thresholds
Administers NPDES stormwater discharge coverage for land-disturbing construction activities.
Jurisdiction over septic tank permits, soil evaluation perk tests, and drainfield sizing.
Mandatory notice window: 48 hours prior to mechanized earthwork (excluding weekends and legal holidays).
Seasonal Constraints & Clearing Windows
Typical days with sub-freezing soil conditions affecting digging.
Peak precipitation window requiring sediment traps and soil aeration.
Logistics, Aggregate Sources & Geohazards
Nearest active quarry: 12.1 miles haul distance.(63 active crushed stone/sand operations within 50 miles).
53.2% of county underlain by soluble carbonate rock formations.
Area-specific FAQ
Do I need to call before digging in Union County?
Yes. You should contact Indiana 811 at least 2 working days before any digging so underground lines can be marked.
How deep do footings need to be in Indiana?
In Indiana, footings typically need to extend below the frost line, which is around 42 inches here. A local contractor will confirm the code requirement for your site.
Verified local listings
Excavation contractors serving Union County
5 verified listings




