Exxon Pipeline Company, Petitioner v. Daniel R. Zwahr and Sandra K. Zwahr, Respondents

Summary

The Texas Supreme Court held that the trial court abused its discretion by admitting the Zwahrs' appraisal expert's testimony because it impermissibly relied on project enhancement and treated the easement as a separate economic unit, violating the project‑enhancement rule. The Court reversed the Court of Appeals' judgment and remanded for further proceedings. The jury‑instruction issue was not addressed because the expert‑admissibility error was deemed harmful.