IN · Northwest Indiana and the Calumet Region
Hydrogeology expert witness in Northwest Indiana and the Calumet Region
Northwest Indiana combines one of the country’s densest concentrations of heavy industry with some of its most vulnerable groundwater. The Calumet Region’s shallow lake-plain sands sit just below decades of slag, fill, and industrial operations along Lake Michigan and the Grand Calumet River. Disputes turn on source history, LNAPL and plume behavior, and how fill and sand interact with surface water.
At a glance
Wetstone Solutions holds Indiana professional geologist licensure and supports hydrogeology expert witness and environmental litigation work in Lake, Porter, and LaPorte counties: steel and refinery sites, slag and industrial fill, residential lead, and contamination in the shallow Calumet sand aquifer.
Northwest Indiana matters that need hydrogeology
These are the dispute types that most often need a Indiana PG hydrogeologist or expert witness in this region. Named sites are regional context, not a list of Wetstone engagements or claimed outcomes.
Steel mill and refinery sites
Integrated steel plants and the Whiting refinery have long monitoring histories and complex source questions. We evaluate conceptual site models, LNAPL behavior, and whether chemistry and heads support allocation arguments.
Slag and industrial fill
Much of the shoreline and many neighborhoods sit on slag and industrial fill that can raise pH and leach metals. Disputes over fill as a source, versus operations as a source, need fill characterization tied to groundwater data.
Residential lead and arsenic
Residential soil contamination in East Chicago, including the USS Lead Superfund site, made lead and arsenic exposure a regional issue. Source and extent questions depend on geochemistry and site history.
Shallow sand aquifer and surface water
The Calumet sand aquifer is thin, unconfined, and closely connected to the Grand Calumet River, wetlands, and Lake Michigan. We evaluate discharge pathways, travel times, and whether models represent that connection.
Sediment and river remediation
The Grand Calumet River and Indiana Harbor have been the focus of major sediment cleanups. Disputes over recontamination and ongoing sources need groundwater discharge evidence.
Model and report review
We review opposing models and reports for conceptual errors, calibration problems, and overstatement, and document the critique for the record.
Northwest Indiana counties we support
Engagements may involve sites or counsel in the Calumet Region and Northwest Indiana, including:
- Lake County
- Porter County
- LaPorte County
Statewide Indiana context: Hydrogeology expert witness in Indiana.
More in Indiana
Frequently asked questions
- Is Wetstone licensed in Indiana?
- Yes. Wetstone maintains Indiana professional geologist licensure and supports Northwest Indiana hydrogeology matters, subject to conflicts, scope, and licensing rules.
- Where are Indiana environmental permit decisions appealed?
- Appeals of Indiana Department of Environmental Management decisions generally go to the Indiana Office of Environmental Adjudication. Wetstone can review the hydrogeologic basis of the decision and support expert work.
- Why is the Calumet sand aquifer a special case?
- It is shallow, permeable, and tightly connected to rivers, wetlands, and Lake Michigan, and much of it lies beneath slag and fill. Contaminants can move quickly to surface water, so pathway opinions need careful attention to fill and discharge zones.
- Is Wetstone local to Northwest Indiana?
- No. Wetstone is based in Western Pennsylvania. Site visits, depositions, and hearings in Northwest Indiana are scheduled per matter.
Discuss a Northwest Indiana or Calumet Region matter after a conflict check.