Kentucky Rejects Derivative Sovereign Immunity for Highway Design Consultants; “Mandated Design” and Federal Standards Do Not Bar Parallel Negligence Claims

I. Introduction

In Hdr Engineering, Inc. v. Kristina L. Ives, Individually (rendered April 23, 2026), the Supreme Court of Kentucky addressed whether private engineering firms that designed a widened segment of Interstate 65 could defeat negligence and wrongful-death claims at the summary-judgment stage based on (1) immunity derived from their contractual relationship with the Kentucky Transportation Cabinet (“KYTC”), (2) a “government-mandated design” theory (often described as a governmental contractor defense), and (3) federal preemption arising from Federal Highway Administration (“FHWA”) oversight of National Highway System (“NHS”) design standards.

The plaintiffs—Kristina L. Ives (individually, as next friend for minor children, and as personal representative of the estate of Hiram Dudley Ives, III) and Jennings L. Copley—alleged that the defendant engineering entities (WSP USA, Inc.; HMB Professional Engineers; HDR Engineering; and others) negligently designed drainage and cross-slope conditions in a curved segment of I-65 after widening, increasing water pooling and hydroplaning risk. The trial court granted summary judgment to the engineers on immunity and preemption grounds; the Court of Appeals reversed; and the Supreme Court affirmed the reversal.

II. Summary of the Opinion

The Court held that summary judgment was improper for three independent reasons:

  1. No automatic immunity for state contractors: under long-standing Kentucky law, private contractors (including design professionals) do not share the Commonwealth’s sovereign immunity merely because they contract with a state agency.
  2. “Mandated design” does not warrant summary judgment where material facts are disputed: even if Kentucky recognizes a rule limiting contractor liability when the government mandates the precise design/specifications, a genuine factual dispute existed here about whether the challenged design choices were truly mandated (as opposed to engineer-driven professional judgments within flexible guidelines).
  3. No federal preemption: plaintiffs’ negligence theories were “parallel” to federal design requirements (i.e., they did not seek to impose a higher standard than federal law), and the federal scheme did not substantially subsume Kentucky tort law so as to impliedly preempt these claims.

III. Analysis

A. Precedents Cited

1. Summary judgment framework

  • Motorists Mut. Ins. Co. v. First Specialty Ins. Corp., 706 S.W.3d 120 (Ky. 2024): reaffirmed the standard that summary judgment is appropriate only when there is “no genuine issue as to any material fact” and the movant is entitled to judgment as a matter of law.
  • Caniff v. CSX Transp., Inc., 438 S.W.3d 368 (Ky. 2014): confirmed de novo appellate review of summary judgment.

2. Sovereign/derivative immunity and contractors

  • Comair, Inc. v. Lexington- Fayette Urb. Cnty. Airport Corp., 295 S.W.3d 91 (Ky. 2009): anchored sovereign immunity principles and articulated a functional/source-oriented inquiry for certain immunity questions; importantly, it did not establish a bright-line extension of immunity to contractors.
  • Taylor v. Westerfield, 233 Ky. 619, 26 S.W.2d 557 (1930): the opinion’s historical keystone—Kentucky rejected the notion that an independent contractor performing work for the state is categorically shielded; instead, the contractor is responsible “just as he would be on private work.”
  • Combs v. Codell Construction Co., 244 Ky. 772, 52 S.W.2d 719 (1932) and Codell Construction Co. v. Steele, 247 Ky. 173, 56 S.W.2d 955 (1933): reinforced that governmental immunity does not absolve a contractor from negligence in performing a contract.
  • Shadrick v. Hopkins County, Ky., 805 F.3d 724 (6th Cir. 2015): persuasive federal authority applying Kentucky law; held a private medical contractor did not share governmental immunity despite performing a government function, emphasizing the contractor’s independent, for-profit status and lack of governmental “origin.”
  • H.H. Miller Constr. Co. v. Collins, 269 Ky. 670, 108 S.W.2d 663 (1937) and Hunt-Forbes Constr. Co. v. Robinson, 227 Ky. 138, 12 S.W.2d 303 (1928): recognized that a contractor may avoid liability when performing without negligence in conformity with plans/specifications, but remains liable for negligent performance. The Court used these to support liability principles—while distinguishing the design context.

3. The “government-mandated design” line of cases

  • Rigsby v. Brighton Engineering Co., 464 S.W.2d 279 (Ky. 1970): central to both majority and dissent. In Rigsby, summary judgment was upheld where the government’s criteria did not require guardrails and the consultant had “no discretion” to deviate; recommending guardrails would have been futile. Here, the Court treated Rigsby as a negligence/discretion case—not a sovereign immunity extension—and found factual disputes about whether the alleged defect was truly mandated.
  • City of Louisville v. Padgett, 457 S.W.2d 485 (Ky. 1970): recognized that contractors typically are not liable when they follow plans/specifications absent negligence or willful tort. The dissent relied heavily on Padgett to frame a “governmental contractor defense.” The majority, however, emphasized the live factual dispute over whether the challenged feature was mandated versus chosen within flexible standards.
  • McCarty v. Willett, 2023 WL 7931118 (Ky. App. Nov. 17, 2023) (unpublished): cited for its distinction between “immunity” labels and negligence analysis and for remanding where factual disputes existed about the nature of government approval/mandate.

4. Distinguishing cases offered by the engineers

  • Teager v. City of Flemingsburg, Clay City v. Abner, and McCourt v. City of Covington were treated as largely inapposite because they involved claims against municipalities (or municipal design decisions), not private independent contractors.
  • Portwood v. Hoskins-Squier, 689 S.W.3d 728 (Ky. App. 2024) was distinguished as litigation against government and its employees, not a private contractor.
  • The Court also referenced Sietsema v. Adams, 2015 WL 4776304 (Ky. App. Aug. 14, 2015), reversed on other grounds by, Adams v. Sietsema, 533 S.W.3d 172 (Ky. 2017), in the course of discussing immunity principles.

5. Federal preemption authorities

  • Niehoff v. Surgidev Corp., 950 S.W.2d 816 (Ky. 1997) and Cipollone v. Liggett Group, Inc., 505 U.S. 504 (1992): supplied the taxonomy of express and implied preemption.
  • N.Y. State Conf. of Blue Cross & Blue Shield Plans v. Travelers Ins. Co., 514 U.S. 645 (1995): reinforced the presumption against preemption.
  • Russell v. Johnson & Johnson, Inc., 610 S.W.3d 233 (Ky. 2020): the Court imported the “parallel claim” logic—state tort claims survive if they do not impose duties “different from or in addition to” federal requirements (i.e., they remain “in harmony” with federal regulations).
  • CSX Transportation, Inc. v. Easterwood, 507 U.S. 658 (1993): used to show that federal design/control standards often do not “substantially subsume” state tort law; mere federal “touching” of a subject does not preempt traditional negligence principles.

6. Dissent’s additional authorities

  • Al Shimari v. CACI Int'l., Inc., 679 F.3d 205 (4th Cir. 2012) (conceptual distinction between derivative immunity and federal government-contractor preemption defenses).
  • St. Joseph Catholic Orphan Soc'y v. Edwards, 449 S.W.3d 727 (Ky. 2014) (affirmative defense definition).
  • Rowan Cnty. v. Sloas, 201 S.W.3d 469 (Ky. 2006) (governmental functions/discretion background).
  • United States v. S.A. Empresa de Viacao Aerea Rio Grandense (Varig Airlines), 467 U.S. 797 (1984) (policy against judicial second-guessing of discretionary governmental decisions).

B. Legal Reasoning

1. Contractors do not inherit the Commonwealth’s immunity by contract alone

The Court drew a bright doctrinal line between (a) sovereign immunity belonging to the Commonwealth (and statutory protections such as KRS 12.211) and (b) private actors hired by the government. Relying on Taylor v. Westerfield and its progeny, the Court reaffirmed that Kentucky does not treat private contractors as state actors for immunity purposes merely because their work relates to discretionary governmental functions like highway design.

The Court’s use of Shadrick v. Hopkins County, Ky. further emphasized the “source” component: a private, for-profit company that was not created by the government and that operates broadly in private markets does not share governmental immunity, even if it performs a function the government is obliged to provide.

2. “Mandated design” is a fact-sensitive negligence question; here, material disputes barred summary judgment

The opinion accepted that Kentucky case law (notably Rigsby v. Brighton Engineering Co. and City of Louisville v. Padgett) can, in appropriate circumstances, protect contractors from liability when they strictly follow binding governmental criteria that remove meaningful discretion—particularly where an alternative design would be futile or forbidden. But the Court refused to transform those cases into categorical “immunity” for engineers whenever the KYTC/FHWA approves a plan.

Instead, the Court focused on record evidence that KYTC’s own manuals emphasize flexibility and the exercise of “sound engineering principles by experienced design professionals,” and on evidence that project managers relied on hired engineers for drainage design. The plaintiffs’ expert opined the design failed to meet minimum standards (including drainage management that would keep at least part of shoulder runoff out of through lanes), and that the lack of drainage inlets at the accident site increased hydroplaning risk. The engineers countered that the straight-line slope in a curved, superelevated section was standard and compliant.

Because that clash turns on what the applicable standards required, what discretion the consultants retained, and whether the alleged defect was truly “mandated,” the Court held those issues must be resolved by factfinding—not summary judgment. In the Court’s framing, Rigsby did not supply a shortcut: unlike in Rigsby (where plaintiffs did not contradict the proof that the state forbade the desired feature), here plaintiffs presented competing evidence that a safer design feature was allowable within governing standards.

3. Federal highway oversight does not impliedly preempt parallel state negligence claims

The trial court’s preemption ruling was rejected because the plaintiffs’ claims did not seek to impose Kentucky duties “different from or in addition to” federal requirements. The Court used Russell v. Johnson & Johnson, Inc. to underscore that state tort claims survive where they vindicate conduct within the boundaries of federal requirements.

Analogizing to CSX Transportation, Inc. v. Easterwood, the Court reasoned that federal design regulation and approval do not necessarily “substantially subsume” the tort subject matter so as to displace traditional negligence claims—especially where federal standards (including AASHTO’s “Green Book,” as quoted) characterize themselves as guidance requiring professional judgment and flexibility, not as an exhaustive code eliminating negligence litigation.

C. Impact

1. Litigation posture: fewer early exits for design professionals in public projects

The decision makes clear that, in Kentucky, design consultants on state/federal highway projects ordinarily cannot win summary judgment merely by pointing to KYTC/FHWA approval or to the government’s own immunity. Approval evidence may be relevant to reasonableness, but it is not dispositive as a matter of law.

2. A constrained “mandated design/specifications” defense

The Court did not abolish the concept found in Rigsby v. Brighton Engineering Co. and City of Louisville v. Padgett, but it effectively cabins it: a contractor must show that the specific challenged feature was truly mandated in a way that eliminated discretion; otherwise the matter remains a negligence fact question. This shifts focus to documentary proof of mandatory criteria, the availability of design exceptions (where applicable), and the extent of professional judgment embedded in the final plan.

3. Preemption: parallel-claim framing will likely govern future NHS design suits

By treating the negligence claims as “parallel” to federal requirements, the Court signaled that defendants will face an uphill climb arguing implied preemption unless they can show a direct conflict (state law demands what federal law forbids) or that federal regulation occupies the field in a way that substantially subsumes the tort duty at issue.

4. Practical effects on contracting and risk allocation

The record’s emphasis on professional seals, professional-liability insurance, and indemnity obligations suggests heightened attention to contractual risk allocation. Public-project engineers can expect this case to be cited to support the proposition that they remain responsible for professional negligence notwithstanding governmental review.

IV. Complex Concepts Simplified

  • Sovereign immunity: a doctrine preventing the Commonwealth from being sued without consent. It protects the government, not automatically its contractors.
  • Derivative/official immunity (as argued): an extension theory under which a non-government entity claims protection because it performed governmental work. Kentucky, as applied here, does not extend this protection simply because a private firm contracted with the state.
  • “Mandated design/specifications” defense: a negligence principle that can protect a contractor when the government required the exact design choice and the contractor had no discretion to alter it. The key is whether the contractor truly lacked discretion—often a fact question.
  • Federal preemption: state law is invalid only when it conflicts with federal law (or when Congress/agency regulation so fully occupies a field that there is no room for state law). “Parallel” state negligence claims—those seeking compliance with federal standards, not extra duties—typically survive.
  • Design exception (FHWA context): a formal, documented approval to deviate from certain minimum federal design criteria for specific “controlling criteria.” The opinion highlights that not every design feature is eligible as a “controlling criterion,” and disputes may arise over what standards required in the first place.

V. Conclusion

This opinion establishes (and reaffirms) three central Kentucky principles for public-highway design litigation: (1) private engineering contractors do not obtain sovereign or derivative immunity merely by contracting with KYTC; (2) defenses grounded in government “mandate” or plan approval turn on whether the challenged feature was actually compulsory—often a question for the factfinder; and (3) federal highway regulation and FHWA approval do not, without more, impliedly preempt Kentucky negligence and wrongful-death claims that operate in harmony with federal requirements.

The decision thus preserves a meaningful role for state tort law in policing alleged professional design negligence on federally influenced highway projects, while leaving room for contractors to prevail where they can prove the relevant design choice was truly mandated and non-discretionary under governing standards.