Rule 408 Settlements May Prove Knowledge for Alabama Wantonness; Expert Causation Not Always Required in Stormwater Channelization Cases

Case: Matthew T. Winther v. United States Steel Corporation (11th Cir. Mar. 25, 2026) (unpublished)
Posture: Plaintiffs’ appeal (wantonness/punitives JMOL; new trial denial) and defendant’s cross-appeal (causation JMOL)

1. Introduction

This dispute pits “topographically lower” landowners, Matthew and Tracy Winther, against a “topographically higher” developer, United States Steel Corporation (“U.S. Steel”), over alleged stormwater channelization and offsite migration of water, sediment, rock (including riprap), and debris from the long-running development known as The Preserve in Hoover, Alabama. The Winthers claimed U.S. Steel’s grading, deforestation, and drainage planning altered natural drainage and damaged their six-acre, ravine-like property drained by Hurricane Branch.

The central issues on appeal were:

  • Wantonness and punitive damages: whether the evidence permitted a reasonable jury to find U.S. Steel acted with Alabama “wantonness” (reckless or conscious disregard), and whether key “regulatory/settlement” evidence was wrongly excluded.
  • Causation proof: whether expert testimony was required to link Preserve activities to erosion/sediment/debris impacts on the Winthers’ property.

A jury found for the Winthers on channelization, nuisance, and trespass (compensatory damages $235,150), but the district court removed wantonness and punitive damages via judgment as a matter of law (“JMOL”). The Eleventh Circuit largely affirmed the compensatory verdict while reopening the punitive track.

2. Summary of the Opinion

  • Winthers’ appeal: The court vacated the JMOL on wantonness/punitives and vacated the denial of a new trial on those issues, remanding for further proceedings.
  • U.S. Steel’s cross-appeal: The court affirmed the denial of JMOL on causation and affirmed the compensatory judgment on the verdict.

Key doctrinal moves: (1) a jury could find wantonness for later periods as knowledge accrued and controls remained allegedly inadequate; (2) Rule 408 did not categorically bar ADEM consent-decree/settlement materials when offered to prove “knowledge” rather than liability; (3) expert testimony was not necessarily required for causation in this comparatively “contained” surface-water/erosion fact pattern.

3. Analysis

3.1 Precedents Cited

A. Standards of review and appellate constraints

  • Cleveland v. Home Shopping Network, Inc., 369 F.3d 1189 (11th Cir. 2004): supplied the Rule 50 JMOL framework—no “legally sufficient evidentiary basis” for a reasonable jury, with evidence viewed favorably to the nonmovant and with the jury’s prerogative to disbelieve the movant’s evidence. This standard undergirded the reversal on wantonness (enough evidence existed) and the affirmance on causation (enough evidence existed).
  • Ruiz v. Wing, 991 F.3d 1130 (11th Cir. 2021): set the abuse-of-discretion review for new-trial denials and evidentiary rulings, framing the court’s willingness to revisit the Rule 408/403 analysis.
  • Cent. Baptist Church v. Church Mut. Ins. Co., 146 F.4th 1003 (11th Cir. 2025): articulated what counts as “abuse of discretion,” explicitly including errors of law.
  • AcryliCon USA, LLC v. Silikal GMBH & Co., 46 F.4th 1317 (11th Cir. 2022): provided the punchline for the Rule 408 holding: legal error = abuse of discretion, supporting reversal where the district court misapprehended Rule 408(b)’s “another purpose” route.
  • Sapuppo v. Allstate Floridian Ins. Co., 739 F.3d 678 (11th Cir. 2014): enforced appellate waiver/abandonment principles; the court used it to reject U.S. Steel’s underdeveloped element-by-element attacks and damages challenges raised too late or too vaguely.

B. Alabama wantonness and knowledge-based trespass principles

  • Salter v. Westra, 904 F.2d 1517 (11th Cir. 1990): anchored the Erie posture: Alabama defines wantonness, but federal law governs sufficiency to reach the jury.
  • Ala. Code § 6-11-20: supplied the “clear and convincing” punitive threshold and statutory definition of wantonness as “reckless or conscious disregard.”
  • Pugh v. Taylor, 507 So. 2d 428 (1987): provided the classic Alabama definition—conscious act/omission with knowledge injury is likely; also emphasized wantonness is fact-and-circumstance dependent.
  • Joseph v. Staggs, 519 So. 2d 952 (Ala. 1988): clarified that wantonness does not require a specific intent to injure, helping the panel reject any implicit “intent-to-harm” framing.
  • Chestang v. IPSCO Steel (Ala.), Inc., 50 So. 3d 418 (Ala. 2010): functioned as the opinion’s primary yardstick: wantonness requires evidence the defendant knew it was the cause of the invasion/damage—not merely that it received complaints. Critically, the Eleventh Circuit also drew from Chestang the notion that a jury question can exist where there is a “response consistent with an acknowledgment of fault coupled with continued wrongdoing.”
  • Cummans v. Dobbins, 575 So. 2d 81 (Ala. 1991): reinforced that, in trespass, wantonness may be established by “mere knowledge” of invasion of rights, supporting the panel’s focus on knowledge and persistence.
  • Peak v. Parks, 886 So. 2d 97 (Ala. Civ. App. 2003): supplied a close analogue: once aware runoff was harming neighbors, repeated failure to implement appropriate BMPs supported wantonness. The Eleventh Circuit used this to validate the inference that post-notice inaction (or inadequacy) can be “reckless disregard.”
  • Calvert & Marsh Coal Co., Inc. v. Pass, 393 So. 2d 955 (Ala. 1980): supported a time-slicing view—initial conduct may be negligent, later repeats can be wanton; the panel similarly distinguished early remedial steps (2014–2015) from later alleged failures (post-2021/2022).
  • W.T. Ratliff Co., Inc. v. Henley, 405 So. 2d 141 (Ala. 1981): supplied the “complaints + assurances” template for knowledge and wantonness, used to argue that observing the condition and continuing conduct can elevate culpability.

C. Evidence rules: 403, 408, 406 and “other purpose” admissibility

  • Jackson v. Catanzariti, 159 F.4th 874 (11th Cir. 2025): emphasized Rule 403 as an “extraordinary remedy” to be used sparingly and instructed that appellate review maximizes probative value and minimizes unfair prejudice. This theme supported the panel’s skepticism that near-total exclusion of ADEM evidence was justified once Rule 408(b) was properly understood.
  • Cook v. Sheriff of Monroe Cnty., 402 F.3d 1092 (11th Cir. 2005): reiterated district courts’ “considerable leeway” on evidentiary decisions—yet leeway collapses where a legal misconception drives the balancing.
  • Bradbury v. Phillips Petroleum Co., 815 F.2d 1356 (10th Cir. 1987): provided persuasive authority that prior similar incidents can be probative of outrageousness/knowledge, while acknowledging the “forbidden inference” and emotional punishment risks—concerns addressable via limiting instructions and tailored admission.
  • Goldsmith v. Bagby Elevator Co., Inc., 513 F.3d 1261 (11th Cir. 2008): informed the court’s rejection of the Winthers’ Rule 406 “habit” theory; repeated violations are not “habit” unless they show a systematic response to specific situations. Yet Goldsmith also supported the proposition that “me too” evidence may still be admissible for intent/knowledge under other doctrines.

D. Expert testimony gatekeeping and need for experts

  • McCorvey v. Baxter Healthcare Corp., 298 F.3d 1253 (11th Cir. 2002), and United States v. Ware, 69 F.4th 830 (11th Cir. 2023): framed Daubert-style gatekeeping and the appellate reluctance to “micromanage” expert admissibility. They supported affirmance of the exclusion of certain causation/source opinions from Dr. Connors and Johnson as methodologically “observational” and untested.
  • Allison v. McGhan Med. Corp., 184 F.3d 1300 (11th Cir. 1999): supplied the general rule that expert testimony is needed when causation is not a “natural inference” within juror experience (often medical/scientific causation). The panel distinguished this stormwater/erosion case as one where jurors can draw inferences from chronology, topography, runoff routing, and visible debris movement.
  • Ramsey v. Consol. Rail Corp., 111 F. Supp. 2d 1030 (N.D. Ind. 2000), and Baskett v. United States, 8 Cl. Ct. 201 (1985): were the defendant’s examples where complex hydrology/contamination warranted experts; the Eleventh Circuit found them inapt given the relatively “contained” setting here.

E. Alabama surface-water causation analogues and lay inference

  • Johnson v. Washington, 474 So. 2d 651 (Ala. 1985), and the already-discussed W.T. Ratliff Co., Inc. v. Henley and Peak v. Parks: supported the court’s conclusion that lay evidence—“no problem until construction”—plus runoff/clearing testimony can support causation without expert quantification.

F. Agency and case management

  • Calvert v. Cas. Reciprocal Exch. Ins. Co., 523 So. 2d 361 (Ala. 1998): stated agency is usually a jury question, but only where the theory is supported and properly presented.
  • Ware v. Timmons, 954 So. 2d 545 (Ala. 2006): provided the “reserved right of control” test separating agent/employee from independent contractor; the panel found the record and litigation posture did not support imputing the engineer’s knowledge to U.S. Steel.
  • Chudasama v. Mazda Motor Corp., 123 F.3d 1353 (11th Cir. 1997): supported the district court’s discretion to manage litigation and reject late-blooming theories not preserved in discovery or the pretrial order.

3.2 Legal Reasoning

A. Wantonness: knowledge can develop over time, and later inaction can be reckless

The court’s wantonness analysis is temporal and knowledge-centered. It agreed with the district court that U.S. Steel’s initial response to the 2014–2015 Tributary 1 complaints—investigation and partial rerouting to Tributary 2—did not, on this record, compel an inference of “reckless or conscious disregard.” But the Winthers’ claims ran through 2024, and the panel held a jury could find that, across years of complaints, site observations, engineering deliberations, and later erosion/debris events (including the 2021 culvert failure and 2022 observed Tributary 2 erosion), U.S. Steel accumulated the critical Chestang element: knowledge not only of a problem, but that it was causing the problem.

The key move is that a defendant is not insulated from wantonness merely because it took some remedial steps early. A reasonable jury could find wantonness where, after gaining knowledge of harm and causal connection, the defendant fails to implement reasonable measures to control discharge of stormwater, sediment, and debris, thereby “continu[ing] to inflict damage” (Chestang) in a manner consistent with Peak v. Parks.

B. Rule 408: settlement/consent-decree evidence may be admissible to prove knowledge (not liability)

The opinion’s most concrete evidentiary holding is that the district court committed a legal error in treating Rule 408 as a categorical bar. Although Rule 408(a) bars compromise evidence to prove “liability for, invalidity of, or amount of a claim,” Rule 408(b) allows it for “another purpose.” Here, the “another purpose” was knowledge—the very fulcrum of Alabama wantonness under Chestang v. IPSCO Steel (Ala.), Inc..

Because knowledge was a material fact of consequence, the ADEM materials had probative value: they tended to make it more likely U.S. Steel knew of similar stormwater/runoff/debris problems associated with Preserve development, and thus knew its activities could be causing the Winthers’ harm. The court acknowledged classic Rule 403 dangers (punishment impulse; confusing other properties/issues) but indicated these could be mitigated with narrowing and limiting instructions rather than near-total exclusion—particularly once probative value is properly credited.

C. Causation without experts: when jurors can infer cause from ordinary experience

On cross-appeal, the court rejected a broad rule requiring expert causation testimony in stormwater/erosion disputes. It emphasized the “contained” nature of the drainage setting, the before-and-after timeline (property stable until major clearing/Phase XIII), documentary evidence that plans increased flows to Tributary 1, witness testimony linking increased flows to erosion, and direct observations of debris and non-native riprap moving downhill. Under Allison v. McGhan Med. Corp., the jury could draw a “natural inference” from human experience; complex contaminant migration cases cited by U.S. Steel were distinguishable.

D. Expert exclusions affirmed (and largely nonprejudicial to the verdict)

The panel affirmed the district court’s Daubert-style exclusion of certain expert opinions from Dr. Connors and Johnson for lack of reliable methodology (no testing, largely observational, internal inconsistencies). It also found no meaningful prejudice because the jury nevertheless found U.S. Steel liable on the key compensatory theories, and the appellate court itself held causation could be established without experts.

3.3 Impact

  • Rule 408(b) as a knowledge pathway in punitive litigation: In federal court, defendants facing Alabama wantonness/punitives should expect more aggressive attempts to admit regulatory settlements/consent decrees to prove knowledge—especially where knowledge is an element rather than a mere propensity argument. Trial courts will likely respond with tighter tailoring (time limits, subject-matter similarity requirements, redactions) rather than blanket exclusion.
  • Temporal “knowledge accrual” framing: The decision encourages plaintiffs to develop a record showing when a defendant crossed the line from notice to knowledge-of-causation, and what the defendant did (or did not do) afterward. Defendants, conversely, will be incentivized to document investigations, causation analyses, and control measures as the record against a later “continued wrongdoing” theory.
  • Expert testimony not automatically required in surface-water disputes: The court’s approach makes room for lay causation proof where the drainage path, timeline, and physical evidence (debris, sediment deposition, erosion patterns) are within jurors’ ordinary reasoning. Defendants can still argue complexity, confounders, and the need for technical proof, but a categorical “no expert = JMOL” position is weakened in similar fact patterns.

4. Complex Concepts Simplified

  • Judgment as a matter of law (Rule 50): the judge removes an issue from the jury only if no reasonable jury could find for the nonmoving party on that issue.
  • New trial (Rule 59): a remedy when errors (e.g., evidentiary rulings) or other problems likely affected the fairness or outcome of the trial.
  • Wantonness (Alabama): more than negligence; it is acting (or failing to act) with conscious or reckless disregard where injury is likely—often proven through knowledge plus continued harmful conduct.
  • Punitive damages: damages meant to punish/deter; in Alabama tort cases they require “clear and convincing” proof of wantonness (among other mental states).
  • Rule 408 compromise evidence: settlement-related evidence cannot be used to prove liability or the amount of a disputed claim, but it can be used for other reasons (e.g., proving notice/knowledge), subject to Rule 403 balancing.
  • Rule 403 unfair prejudice: evidence can be excluded if it is likely to provoke an improper decision (e.g., punishing for being a “bad actor”) that substantially outweighs its legitimate value.
  • Habit evidence (Rule 406): a narrow category; repeated conduct is not “habit” unless it is a nearly automatic, systematic response to a specific situation.
  • Channelization/surface-water drainage claims: claims that a landowner altered natural flow—collecting, concentrating, or redirecting runoff—so it discharges onto another’s property with harmful force or volume.

5. Conclusion

The Eleventh Circuit’s decision has two principal takeaways. First, it revives the Winthers’ punitive pathway by holding that a jury could find Alabama wantonness where knowledge of causation accrued over time and the developer allegedly failed to adopt reasonable discharge controls thereafter. Second, it clarifies that Rule 408 does not categorically bar regulatory settlement or consent-decree evidence when offered to prove knowledge—an essential wantonness component—though Rule 403 may still require careful limits. At the same time, the court preserved the compensatory verdict by rejecting a broad expert-testimony requirement for causation in a fact pattern that jurors can evaluate using ordinary experience and circumstantial evidence.