Expert Witness Testimony Backed by Engineering Experience

Flooding and stormwater issues can have significant environmental, economic and public health consequences. Expert witness services for stormwater and flood cases can provide an important link between technical knowledge and the legal process. They help the court understand the complex technical and scientific aspects of these cases.

Chad Ballard brings more than technical proficiency to the role of expert witness. He brings authority, composure and the ability to explain highly complex topics in ways that judges, juries and attorneys can understand.

General Specialty

  • Civil Engineering
  • Hydrology

Specialty Focus

  • Advanced Modeling
  • Bridge Hydraulics
  • Dam Break/Failure
  • Erosion
  • FEMA
  • Flood Forensics
  • Flooding
  • Floodplain
  • Hydrology
  • Levee Breach
  • Rainfall
  • River Hydraulics
  • Storm Recreation
  • Stormwater
  • Water Resources

Expert Witness Services

High Water Mark provides expert witness services for legal cases involving:

  • Stormwater runoff disputes
  • Drainage failures
  • Floodplain encroachments
  • Water rights and diversions
  • Infrastructure design and compliance
  • FEMA map challenges and appeals

Services for Legal Teams

As an expert witness Chad Ballard is able to translate technical information into clear, concise and understandable testimony that can inform legal decision-making. He provides, at all stages of a case, an independent, impartial and authoritative perspective, expert witness services help to ensure that decisions related to stormwater and flooding issues are based on the best available science and evidence.

Our services include:

  • Case Review & Strategy Consultation
  • Expert Reports & Affidavits
  • Deposition and Trial Testimony
  • Forensic Modeling and Simulation
  • Exhibits, Diagrams and Visual Aids
  • Rebuttal Analysis of Opposing Experts
  • Forensic Engineering
  • Litigation Support
  • Flood Event Simulations


We provide early-stage consultation to help legal teams identify technical strengths and weaknesses in their case. Our forensic engineering services help reconstruct events and attribute causality based on physical evidence and historical data.

Why Legal Teams Choose High Water Mark

Chad is a communicator with an engineer’s background, experience and knowledge. His courtroom presence, ability to distill technical material and cross-examination readiness make him a strong advocate on the stand.

Technical Integrity: We don’t take shortcuts. Our conclusions are built on data, validated models and decades of on-the-ground experience.

Strategic Alignment: We understand legal timelines, evidentiary standards and the role of engineering in persuasion.

Case Experience Highlights

You can’t win with vague. You need visual. You need validation. You need an expert who can take the jury from rainfall to runoff to responsibility.