Statute Annotations › Wyoming › Wyo. Stat. Ann. § 1-1-109

Wyo. Stat. Ann. § 1-1-109

Comparative negligence: the cases that interpreted this section

Jurisdiction
Wyoming
Case notes
61
Cited in passing
54
Citing cases indexed
45
Case dates
1978–2026
Screened through
2026-04-09
Courts' treatment: live
No reviewed case has held this section invalid, preempted, superseded or repealed.
This reflects what the reviewed cases said, not legislative action: a later amendment or repeal by the legislature would not appear here unless a reviewed case discussed it.

115 citing cases reviewed: 61 interpreted the section (annotated below), 54 cited it only in passing. Cases filed after 2026-04-09 may not have been reviewed yet.

Have a situation under Wyo. Stat. Ann. § 1-1-109?

These notes show how courts have ruled. Ask about your specific facts and see which of these rulings apply, with citations you can check.

Later changes in law

Changes after the earliest notes below. A note stating a rule one of these changed is marked "Law changed since".

  • 1994 Wyo. Sess. Laws ch. 98, § 1 amended § 1-1-109 to compare broader forms of fault, including willful conduct, strict tort liability, and breach of warranty, and eliminated joint and several liability. Source

Comparative fault—each defendant’s proportionate share

In a tort case, each defendant is responsible for the proportionate share of total fault that the jury assigns.

Rudy v. Bossard · filed 2000-02-28

Wyo. Stat. Ann. § 1-1-109 (LEXIS 1999) indicates that each defendant in a tort case is responsible for his proportionate share of the total fault as determined by the jury.
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Section 1-1-109(d) makes each defendant liable only for its proportionate share of the total damages, abolishing joint-and-several liability in a simple-negligence case even when the claimant is free of fault.

Anderson Highway Signs & Supply, Inc. v. Close · filed 2000-05-04(d)

Applying Wyo. Stat. Ann. § 1-1-109(d), it is clear the district court erred in assigning to Anderson the obligation of paying 100% of the Closes' damages. The plain and unambiguous language of the statute dictates that Anderson is only responsible for 50% of the damages, in proportion to its percentage of fault.
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Section 1-1-109(a) compares a plaintiff’s negligence separately with each person from whom the plaintiff seeks recovery.

BD. OF CTY. COM'RS OF CTY., ETC. v. Ridenour · filed 1981-02-03(a)

First, the simple language of the statute is that the percentage of the plaintiff's negligence will be compared to the percentage of negligence attributed to "the person against whom recovery is sought."
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Section 1-1-109(a) compares a plaintiff’s negligence individually with each person from whom recovery is sought; the plaintiff cannot recover from a person whose negligence is no greater than the plaintiff’s.

Board of County Commissioners v. Ridenour · filed 1981-02-03(a)

After carefully reviewing these arguments, we conclude that the legislature in enacting the Comparative Negligence Act adopted the “Wisconsin Rule.” We have reached this conclusion for several reasons. First, the simple language of the statute is that the percentage of the plaintiff’s negligence will be compared to the percentage of negligence attributed to “the person against whom recovery is sought.” (Emphasis added.)
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Law changed since The 1994 amendment ended the separate defendant-by-defendant recovery rule and eliminated joint and several liability.

Section 1-1-109(a) permits recovery only from defendants whose negligence exceeds the plaintiff’s and requires all causative fault to be included in that comparison.

Burton v. Fisher Controls Co. · filed 1986-01-17(a)

Under § l-l-109(a), supra note 2, the plaintiff can recover only from those defendants whose negligence exceeds his own, and for that calculation to be made, 100 per cent of the causative fault must be included in the formula.
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Section 1-1-109(d) limits each defendant’s liability to the percentage of fault assigned to that defendant, so a defendant receives no credit for sums paid by settling parties.

Haderlie v. Sondgeroth · filed 1993-12-15(d)

Credit would not be given because the amount of judgment for which each defendant is liable is always limited by the percentage of fault assigned to that defendant. Therefore, as a matter of law, Haderlie can have no credit upon the judgment for sums paid by others because Haderlie, if and when he pays 100 percent of this judgment, will not pay more than the “percentage of the amount of fault attributed to him” by the jury in its verdict finding him 100 percent at fault.
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Apportionment of fault among parties and nonparties

Section 1-1-109(a)(i) permits the jury to apportion fault among all parties and nonparties whose acts proximately caused the claimant's injury.

Smyth v. Kaufman · filed 2003-04-30(a)(i)

It is also well established, however, that, under Wyoming's comparative fault scheme, a jury is entitled to apportion the fault of all those whose acts proximately caused injury to the claimant-parties and nonparties alike. Wyo. Stat. Ann. § 1-1-109 (LexisNexis 2001).
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Section 1-1-109 requires the fact finder to determine the percentage of negligence attributable to everyone at fault, including nonparties.

Cities Service Co. v. Northern Production Co. · filed 1985-08-23

With the adoption of comparative negligence, § 1-1-109, W.S.1977, a method was provided for determining the percentage of negligence attributable to each participant which was a cause of a plaintiff’s injuries. The percentage of negligence of everyone at fault, including non-parties, should be determined by the fact finder in arriving at the 100 percent of negligence that caused the injuries.
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Comparative fault and initial duty

Section 1-1-109 makes comparative-fault evidence relevant to reducing damages, but does not define or alter a defendant’s initial duty.

Thom v. Bristol-Myers Squibb Co. · filed 2003-12-22

Third, the Wyoming comparative fault statute has no effect on the application of the learned intermediary doctrine. ... Wyoming’s comparative fault scheme, on the other hand, presents evidence of another’s negligence “in order to reduce damages; [it] in no way defines or affects the scope of the defendant’s initial duty.”
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Section 1-1-109 removes absolute defenses based on a plaintiff’s negligence but does not create new duties of care for defendants.

Sherman v. Platte County · filed 1982-04-05

Comparative negligence only abrogated absolute defenses involving the plaintiff’s own negligence in bringing about his or her injuries. See Brittain v. Booth, Wyo., 601 P.2d 532 (1979). However, it did not impose any new duties of care on prospective defendants.
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Section 1-1-109 apportions negligence damages but does not create new duties of care or abrogate the natural accumulation and obvious danger rules.

Eiselein v. K-Mart, Inc. · filed 1994-02-08(a)

We find support for the Sherman and O’Donnell decisions in the language of Wyoming’s comparative negligence statute, WYO. STAT. § 1-1-109 (1988). ... The plain language of the statute cannot be read to impose new duties of care on prospective defendants.
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Comparative fault—Apportionment to immune actors

An immune entity may still be an “actor” whose proximate fault the jury must apportion under Wyoming’s comparative-fault scheme.

Pinnacle Bank v. Villa · filed 2004-11-30(a)(i), (a)(iv), (c)(i)(A), and (e)

As can be seen by the plain language of this statute, the Wyoming legislature has decided that the jury must determine the percentage of fault attributable to each “actor.” § 1-1-109(c)(i)(A). ... The definition of “actor” includes an entity whose fault is determined to be the proximate cause of the injury whether or not a party to the litigation. ... While the State is not here subject to strict liability, it can act in a negligent manner by failing to use reasonable care. We therefore conclude that the State can be at “fault” and, therefore, fits the definition of “actor.” ... For these reasons, we conclude that the State, even though immune, can be included in the jury’s comparative fault analysis.
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Section 1-1-109 permits a nonparty actor to be placed on the verdict form when the actor's fault proximately caused the injury, but assigning fault requires proof of negligence, including duty, breach, proximate cause, and actual loss.

Glenn v. Union Pacific Railroad · filed 2011-09-09(a)(i), (a)(iv)

As noted above, under Wyoming's comparative fault statute, a non-party actor may be placed on the verdict form if the actor's fault is determined to be a proximate cause of injury. Wyo. Stat. Ann. § 1-1-109 (LexisNexis 2011). ... Because the definition of "fault" includes acts or omissions "that are in any measure negligent," one who seeks to include a non-party actor on the verdict form must prove that the actor was negligent by showing (1) the actor owed a duty of care to the plaintiff, (2) the actor breached the duty, (8) the actor's breach was the proximate cause of injury or loss to the plaintiff, and (4) the plaintiff suffered actual injury or loss. See Andersen v. Two Dot Ranch, Inc., 2002 WY 105, 111, 49 P.3d 1011, 1014 (Wy0.2002).
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The statute requires the jury to apportion fault among every actor whose proximate conduct contributed to the harm, including nonparties, so each defendant is liable only for its proportionate fault.

Jtl Group, Inc., D/B/A Knife River, a Wyoming Corporation and Roadworx Industries, Llc, a Wyoming Limited Liability Comp · filed 2022-06-07(c)(i)(A), (a)(i)

Our comparative fault statute mandates the jury to determine “the percentage of fault attributable to each actor.” Wyo. Stat. Ann. § 1-1-109(c)(i)(A) (LexisNexis 2021) (emphasis added). An “actor” is defined as “a person or other entity, including the claimant, whose fault is determined to be a proximate cause of the death, injury or damage, whether or not the actor is a party to the litigation[.]” Wyo. Stat. Ann. § 1-1-109(a)(i). “‘Fault’ includes acts or omissions, determined to be a proximate cause of death or injury to person or property, that are in any measure negligent, or that subject an actor to strict tort or strict products liability, and includes breach of warranty, assumption of risk and misuse or alteration of a product[.]” Wyo. Stat. Ann. § 1-1-109(a)(i). As seen by the plain language of the statute, the Wyoming legislature determined it is the jury’s responsibility to apportion the percentage of fault attributable to each “actor,” which facilitates the legislature’s objective to hold each defendant liable only for his proportion of fault.
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Comparative fault—Claimant's fault over 50 percent bars recovery

Subsection (b) bars a claimant from recovering when the claimant's contributory fault is more than 50 percent of the total fault of all actors.

Parrish v. Groathouse Construction, Inc. · filed 2006-03-22(b)

As long as Mr. Parrish’s fault remains greater than fifty percent, he is not entitled to recovery under Wyoming’s comparative fault statute. ... Under Wyoming’s comparative fault statute, a claimant cannot recover for an injury unless "the contributory fault of the claimant is not more than fifty percent (50%) of the total fault of all actors." Wyo. Stat. Ann. § 1 — 1—109(b) (Lexis-Nexis 2005).
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Law changed since The 1994 amendment changed the threshold: a claimant with 50 percent fault may recover; only fault greater than 50 percent bars recovery.

Section 1-1-109 bars a claimant from recovering when the claimant is 50 percent at fault.

Jones v. Sheridan County School Dist. No. 2 · filed 1987-01-12

Under our type of comparative negligence — § 1-1-109, W.S. 1977 — appellee who caused 50 percent of the loss pays nothing, and appellant who was responsible for just 50 percent of her own damage recovers nothing.
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Comparative fault in fraud actions

Section 1-1-109 does not permit a jury in a fraud case to compare the victim’s negligence with the perpetrator’s intentional conduct to reduce the perpetrator’s liability.

Erdelyi v. Lott · filed 2014-04-11

Absent clear statutory language showing the legislature intended the negligence of a fraud victim to be compared to the conduct of the perpetrator, thereby potentially reducing the latter’s liability for his intentionally wrongful acts, we decline to hold that § 1-1-109 is a proper matter for a jury instruction in a fraud case.
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Comparative fault—jury allocation and reduction of damages

The statute requires the jury to assign each actor a percentage of fault, defines actor and fault broadly, and reduces a plaintiff’s damages in proportion to the plaintiff’s fault.

Steven F. Ludlow · filed 2015-03-24(c)(i)(A), (a)(i), (a)(iv), (b)

Wyo. Stat. Ann. § 1-1-109(c)(i)(A) (LexisNexis 2013) provides that a jury should determine “the percentage of fault attributable to each actor.” The term “actor” is defined as “a person or other entity, including the [plaintiff], whose fault is determined to be a proximate cause of the death, injury or damage, whether or not the actor is a party to the litigation.” Wyo. Stat. Ann. § 1-1-109(a)(i). The term “fault” is defined to include “acts or omissions, determined to be a proximate cause of death or injury to person or property, ... This system is commonly referred to as comparative fault. ... We have already concluded that the evidence of Ms. Wise’s fault was sufficient to justify the district court’s denial of her motion for judgment as a matter of law. It is also sufficient to support the district court’s decision to instruct the jury on comparative fault. ... This was not an unequivocal admission of 100% of the fault that eliminated comparative fault as an issue to be determined by the jury. The district court properly instructed the jury on comparative fault.
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A plaintiff’s negligence may be submitted to the jury under comparative negligence only when substantial evidence supports it.

Chrysler Corp. v. Todorovich · filed 1978-06-22

The same rule would apply with respect to the negligence of a plaintiff in a comparative negligence context. ... We hold that the trial court ruled correctly in refusing to submit the question of Todorovich’s negligence to the jury insofar as the operation of his motor vehicle was concerned.
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Comparative negligence is ordinarily a jury question, and a court may decide the plaintiff’s share of negligence on summary judgment only in rare cases.

Connett Ex Rel. Connett v. Fremont County School District No. 6 · filed 1978-07-11

The comparison of causal negligence under such a statute, is peculiarly a jury function, and only in rare cases is it permissible for a court to hold that a plaintiff’s conduct reflects at least 50 percent of the negligence.
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Section 1-1-109 requires negligence liability to be assessed by comparative fault percentages; parties cannot replace that standard with a contractual gross-negligence requirement.

Tate v. Mountain States Telephone & Telegraph Co. · filed 1982-06-08

Since the enactment of the comparative negligence statute, § 1-1-109, W.S.1977,1 the determination of liability in a negligence case must be considered with reference to comparative negligence on a percentage basis. ... The public policy, then, as established by the comparative negligence statute is to abolish “gross” as a measure of negligence in negligence actions. The parties to this action cannot change the state policy by contract.
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Law changed since The 1994 amendment eliminated joint and several liability; each defendant is now liable only for that defendant’s share of total fault.

Section 1-1-109(a) permits a negligent plaintiff to recover from a defendant whose fault is greater than the plaintiff’s, with damages reduced by the plaintiff’s share of fault.

Kirby Building Systems v. Mineral Explorations Co. · filed 1985-08-01(a)

As has been explained above, and as is contemplated by statute (§ l-l-109(a)) and interpretative case authority, the plaintiffs’ percentage of fault, if any, must first be converted to a dollar figure and subtracted from the verdict. If there are defendants whose fault exceeds that of the plaintiff, the plaintiff may proceed against any or all of such tortfeasors jointly or severally for the full amount of the judgment, and, contrary to the position of the appellant Kirby, no other reduction may be made from the verdict figure which reduction is based upon the fault of a tortfeasor.
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Section 1-1-109 leaves the comparison of negligence to the fact finder when the evidence permits differing opinions.

Cline v. Sawyer · filed 1980-10-23

Unless the evidence is such that it can reasonably lead to one conclusion, the question of negligence is primarily a question of fact, and the duty to make the comparison of negligence as required by the comparative negligence statute is for the fact finder if the evidence can result in a difference of opinion.
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Section 1-1-109 requires the jury to determine each party's percentage of fault separately when a plaintiff's contributory negligence is at issue.

Martinez v. Union Pacific Railroad Company · filed 1983-08-18

Under Wyoming law the jury must determine the percentage of fault of each party when the contributory negligence of the plaintiffs is at issue.
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Section 1-1-109 requires the jury to determine each party’s percentage of fault separately when a plaintiff’s contributory negligence is at issue.

Martinez v. Union Pacific Railroad · filed 1983-08-18

Under Wyoming law the jury must determine the percentage of fault of each party when the contributory negligence of the plaintiffs is at issue.
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Section 1-1-109 compares a plaintiff’s negligence with total fault at trial, but possible plaintiff negligence does not require a trial to apportion liability without a material factual question about the defendant’s negligence.

Radosevich v. Board of County Commissioners · filed 1989-07-03

This negligence is compared to the total fault under W.S. 1-1-109 if there is a trial. ... Appellant contends that a jury trial is needed to compare the negligence of the parties. While it appears from the materials presented in support of summary judgment that the plaintiff in this case may have been negligent, negligence of the plaintiff alone does not automatically require a trial to apportion liability. There must be a question of material fact in regard to defendants’ negligence; negligence of a defendant will not be presumed merely because a plaintiff was injured.
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Section 1-1-109(b)(i)(B) did not require an instruction about the employer’s immunity where the jury was told how the decedent’s percentage of fault affected recovery, at least under plain-error review.

Furman v. Rural Electric Co. · filed 1994-02-18(b)(i)(B)

The trial court gave an instruction describing Wyoming’ comparative fault scheme and alerting the jury that if it found decedent over fifty percent at fault then Furman will recover nothing. We recently found a similar instruction adequate for compliance with Wyo.Stat. § l-l-109(b)(i)(B). Haderlie v. Sondgeroth, 866 P.2d 703 (Wyo.1993). Therefore, we find no plain error by the trial court in failing to inform the jury that the Highway Department was immune from suit.
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Comparative negligence — plaintiff's recovery

Section 1-1-109(b) allows a plaintiff who is partly at fault to recover proportional damages only if the plaintiff's fault is not more than 50% of the total fault.

Otten v. BNSF Railway Company · filed 2023-02-13(b)

Applying this to a situation where both the plaintiff and the defendant are negligent, the basics of comparative negligence are governed by statute. Wyo. Stat. Ann. § 1-1-109(b). Under the statute, a plaintiff who bears some fault for his injury may recover proportional damages so long as his fault “is not more than fifty percent (50%) of the total fault of all actors.” Id.
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Section 1-1-109(b) permits recovery when a claimant's contributory fault is 50 percent or less, reduces damages proportionally, and bars recovery when the claimant's fault exceeds 50 percent; it applies broadly to negligence actions unless another statute expressly limits it.

Bunning v. Romero · filed 2026-04-09(b)

Under this subsection, a plaintiff, even if at fault to some degree for the injury for which he’s seeking to recover damages, may still recover those damages if his contributory fault is not more than fifty percent of the total fault of all actors. Wyo. Stat. Ann. § 1-1-109(b); see also Schneider Nat., Inc., 843 P.2d at 569. However, a plaintiff is barred—prohibited or prevented—from recovery if his contributory fault is more than fifty percent of the total fault of all actors. See Parrish, ¶ 13, 130 P.3d at 506 (“[a]s long as Mr. Parrish’s fault remains greater than fifty percent, he is not entitled to recovery under Wyoming’s comparative fault statute.”) ... If the Wyoming Legislature intended to preclude the application of § 1-1-109 to violations of § 31-5-222, it would have expressly included plain clear language to that effect. It did not. Thus, § 1-1-109 applies to Mr. Bunning’s case.
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Section 1-1-109 applies only when the plaintiff is contributorily negligent; a plaintiff free from negligence has no reduction in recovery.

Palmeno v. Cashen · filed 1981-04-22

Under its own terms, § 1-1-109, supra, becomes operative in those cases only where the plaintiff is contributorily negligent. Where the plaintiff is found to have been free from negligence, the statute does not apply. If the plaintiff’s negligence is found to be nil, then his recovery is not diminished.
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Section 1-1-109's comparative negligence procedure applies only when the evidence supports finding the plaintiff contributorily negligent.

Martinez v. City of Cheyenne · filed 1990-05-04(b)(i)(A)

This statute is limited to its invocation “in those cases only where the plaintiff is contributorily negligent.” Palmeno v. Cashen, 627 P.2d 163, 166 (Wyo.1981). If the evidence does not disclose negligence on the part of the plaintiff, the statute does not apply.
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Comparative fault—Application and 50-percent bar

Section 1-1-109 requires the jury to compare willful conduct with negligence when apportioning fault.

Board of County Commissioners Ex Rel. Teton County Sheriff's Department v. Bassett · filed 2000-07-25

We have a duty to effectuate this intent, and therefore, hold that willful conduct must be compared with negligence under Wyo. Stat. Ann. § 1-1-109.
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Section 1-1-109 permits a jury determination of comparative fault against derivative defendants when the alleged actor's negligence is established.

Beavis Ex Rel. Beavis v. Campbell County Memorial Hospital · filed 2001-03-26

Although the parties spend little time discussing comparative fault, we believe this case must be analyzed consistently with the Wyoming Comparative Fault Statute, Wyo. Stat. Ann. § 1-1-109 (Lexis 1999), in order to uphold the legislative mandate on comparative fault.
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Comparative-negligence standards under § 1-1-109 preserve the sudden-emergency doctrine as a circumstance for the jury's apportionment of fault.

Roberts v. Estate of Randall · filed 2002-07-26

Now that comparative negligence standards apply, we continue to see that such circumstances are relevant to a jury’s proper apportionment of fault and hold that comparative negligence statutes have not eliminated the necessity of the sudden emergency doctrine.
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Comparative fault in contract actions

Section 1-1-109 applies to tort claims involving personal injury or property damage, not to a breach-of-contract action.

Fuentes v. JEDNAT · filed 2010-04-02

The adoption of comparative fault mandates that the trier of fact determine issues of proximate cause and allocate liability accordingly.
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Section 1-1-109 does not provide a basis for apportioning liability in a breach-of-contract action because it applies to tort claims for personal injury or property damage.

Strong Construction Inc. v. City of Torrington · filed 2011-05-23(a)(iv)

Although Wyo. Stat. Ann. § 1-1-109 has been extended to strict tort liability and products liability actions since the decision in Phillips, the statute does not provide any indication that comparative fault is applicable to a breach of contract action.
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Section 1-1-109(a) applies only to negligence claims; it neither bars nor reduces recovery for breach of contract or fiduciary duty in a legal malpractice action.

Jackson State Bank v. King · filed 1993-01-06(a)

We are in accord with Miles’ position that the plain and unambiguous language of § l-l-109(a) demonstrates that the statute applies only to those causes of action arising out of negligence. It does not extend to those that are based upon a theory of contract or a theory of breach of fiduciary duty. It follows that the statute does not serve as a bar to those claims by Miles, nor can it be invoked to reduce his recovery by any percentage of fault.
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Section 1-1-109(a) does not apply to legal malpractice claims for breach of contract and breach of fiduciary duty.

The Jackson State Bank, a Wyoming Banking Corporation, and Maurice E. Miles v. King · filed 1993-04-23(a)

This case was tried and instructed under the assumption that the comparative negligence statute applied. The answers to the certified questions make clear that this assumption was incorrect.
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Comparative fault and intentional torts

Section 1-1-109 does not permit an intentional tortfeasor to shift responsibility to the victim by invoking the victim's comparative fault.

Alexander Vincent Ray Cave v. The State of Wyoming · filed 2022-03-01

Applying our reasoning in Erdelyi, we conclude it would be against public policy to allow an intentional tortfeasor like Mr. Cave to “escape liability for his wrongful conduct by shifting the responsibility to [his] victim.”
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Law changed since The 1994 amendment broadened § 1-1-109 from negligence to fault; the Wyoming Supreme Court held in 2000 that willful conduct must now be compared with negligence.

Section 1-1-109 does not require reducing damages for a plaintiff’s comparative negligence when the defendant’s misconduct is willful and wanton.

Danculovich v. Brown · filed 1979-04-11(a)

The conclusion, then, is that § 1-1-109 does not mandate reduction of damages on the basis of comparative negligence of the plaintiff if defendant’s misconduct is willful and wanton.
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Law changed since The 1994 amendment broadened § 1-1-109 to compare willful conduct with negligence, ending the separate treatment of ordinary and culpable negligence stated here.

Section 1-1-109 requires the jury to apportion the parties’ ordinary negligence before deciding whether the defendant was culpably negligent.

Barnette v. Doyle · filed 1981-01-23(a)

Because ordinary negligence cannot be compared to culpable negligence, a jury must first be required to apportion the ordinary negligence of both the plaintiff and the defendant under the comparative negligence statute, § 1-1-109.
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Assumption of risk and obvious danger

Section 1-1-109(a) treats assumption of risk as contributory negligence to be apportioned, rather than as an absolute defense.

Brittain v. Booth · filed 1979-10-17(a)

Accordingly, assumption of risk, as a form of contributory negligence is not an absolute defense to a negligence action, but is a basis for apportionment of fault.
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Section 1-1-109(a) forbids an obvious-danger instruction from automatically barring recovery; the jury must assess the parties’ comparative negligence.

Cervelli v. Graves · filed 1983-04-06(a)

Instruction 10 in effect resurrects contributory negligence as a bar to appellant’s recovery. Our comparative negligence statute, see fn. 5, clearly forbids any such bar to appellant’s recovery.
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Section 1-1-109 permits the trier of fact to consider a known and obvious danger when determining the plaintiff’s percentage of negligence; the danger does not automatically bar recovery.

O'DONNELL v. City of Casper · filed 1985-03-18

We hold that the known and obvious danger rule does not negate the City’s duty to keep its streets and sidewalks in a reasonably safe condition and in reasonably good repair, and that the obvious danger of the streets may be considered by the trier of fact to determine plaintiff’s percentage of negligence.
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Section 1-1-109 treats assumption of risk as a form of contributory negligence for the jury to apportion, rather than as a complete bar to recovery.

Stephenson v. Pacific Power & Light Co. · filed 1989-09-01

With the advent of comparative negligence legislation, however, assumption of the risk, as a form of contributory negligence, became a basis for an apportionment of fault and no longer operated as a complete bar to recovery.
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Section 1-1-109 treats assumption of risk as a basis for apportioning fault rather than an absolute bar to recovery.

Walters v. Grand Teton Crest Outfitters, Inc. · filed 1992-10-13

Under Wyoming’s comparative negligence statute, Wyo.Stat. 1-1-109 (1988), assumption of risk has been held to be a form of contributory negligence. ... Assumption of risk is now a basis for apportioning fault. ... For these reasons, the Court rejects the defendant’s argument that assumption of risk should be a bar to recovery.
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Section 1-1-109 leaves comparison of the plaintiff’s and defendant’s negligence to the jury even when the danger was obvious to the plaintiff.

Jones v. Chevron U.S.A., Inc. · filed 1986-05-01

Even if the danger was perfectly obvious to appellant, it is the function of the jury, under the comparative negligence statute, to compare his negligence with that of Chevron.
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Section 1-1-109 limits damages according to comparative fault, including fault based on a party’s assumption of risk.

Lompe v. Sunridge Partners, LLC · filed 2014-10-21

Furthermore, the Court’s instruction on comparative negligence addressed these concerns, and required the jury to allocate fault for acts or omissions determined to be a cause of the injury. Fault includes and embraces, among other things, assumption of risk by a party. The recovery of damages is limited in accordance with the comparative fault statute. See e.g., Wyo. Stat. § 1-1-109.
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Loss of consortium

Section 1-1-109(b)(ii) limits a spouse’s loss-of-consortium recovery by the injured spouse’s percentage of causal negligence.

Weaver v. Mitchell · filed 1986-03-18(b)(ii)

The trial court should have reduced the award to Marilynn Mitchell by the percentage of fault attributed her husband, Preston Mitchell. A cause of action for loss of consortium is a derivative action, and the causal negligence of the injured spouse limits recovery of the claiming spouse under the comparative negligence statute, § 1-1-109(b)(ii), W.S.1977.
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Comparative fault in product and warranty claims

Law changed since The 1994 amendment extended comparative fault to breach of warranty claims.

Section 1-1-109(a) does not require contributory negligence to bar recovery on a breach of warranty claim.

Carl SHELDON, Plaintiff-Appellant, v. UNIT RIG & EQUIPMENT CO., an Oklahoma Corporation, Defendant-Appellee · filed 1986-09-29(a)

The Wyoming comparative negligence statute on its face does not resolve the warranty claim issue. The statute refers to an action “to recover damages for negligence.” The statute does not refer explicitly to actions sounding in warranty or in strict liability. At the very least, the statute does not require that we preclude recovery in a warranty action where the jury finds that the plaintiff was contributorily negligent.
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Law changed since The 1994 amendment extended comparative fault to strict tort liability and breach of warranty.

Section 1-1-109 applies only to negligence claims, not strict liability or warranty claims.

Phillips v. Duro-Last Roofing, Inc. · filed 1991-02-21(c), (d)

We concur with appellant that the plain and unambiguous language of W.S. 1-1-109 demonstrates that the statute applies only to causes of action arising out of appellee’s negligence.
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Law changed since Same change as noted above.

Section 1-1-109’s comparative fault rules do not apply to strict liability or breach of warranty claims.

prod.liab.rep. (Cch) P 13,272 Michael Phillips v. Duro-Last Roofing, Inc. · filed 1992-08-25

In light of the Wyoming Supreme Court’s answers to the certified questions, it is obvious that instruction No. 51 was an incorrect statement of Wyoming law. We can only assume that the jury relied on and followed the instructions and, consequently, we find that the jury was misled when it was incorrectly instructed regarding comparative fault principles as applied to claims based on strict liability and breach of warranty.
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Law changed since Same change as noted above.

Section 1-1-109 applies comparative negligence and comparative fault principles to negligence actions, but not to claims based on strict liability or breach of warranty.

Schneider National, Inc. v. Holland Hitch Co. · filed 1992-12-09

A cause of action premised on a theory of strict liability or breach of warranty is, therefore, unaffected by the principles of comparative negligence or comparative fault stated in Wyo.Stat. § 1-1-109.
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Law changed since Same change as noted above.

Section 1-1-109 does not reduce damages for a plaintiff’s comparative fault in a strict liability claim.

Zierke v. Agri-Systems · filed 1993-05-03

The Phillips decision makes it clear that a reduction of damages in proportion to plaintiffs fault is not appropriate in non-negligence causes of action. ... The jury instructions to that effect in the instant case do not state the law correctly.
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Indemnity under comparative fault

Section 1-1-109 leaves equitable implied indemnity available and permits negligence indemnity to be allocated according to comparative fault.

Horowitz v. Schneider National · filed 1993-05-03

The Wyoming Supreme Court has determined that the common law indemnity action has survived the advent of comparative fault, albeit in a different form. ... In a negligence action, "indemnity liability is to be allocated among the parties proportionately to their comparative degree of fault." ... Following the rules announced by the Wyoming Supreme Court, this complaint is sufficient to withstand a motion to dismiss pursuant to Rule 12(b)(6).
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Section 1-1-109 does not bar an express contractual indemnity claim based on a negligently breached duty owed independently to the third-party plaintiff.

Diamond Surface, Inc. v. Cleveland · filed 1998-08-17

We further find that a claim for express indemnity, under limited circumstances, survives the adoption of comparative fault in Wyoming.
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Section 1-1-109 leaves equitable implied indemnity available; negligence-based indemnity is allocated according to comparative fault.

Horowitz ex rel. Estates of Horowitz v. Schneider National, Inc. · filed 1993-05-03

The certified questions raised issues concerning the proper role, if any, of common law indemnity following Wyoming’s adoption of a comparative fault statute in 1986. The Wyoming Supreme Court has determined that the common law indemnity action has survived the advent of comparative fault, albeit in a different form. ... Following the rules announced by the Wyoming Supreme Court, this complaint is sufficient to withstand a motion to dismiss pursuant to Rule 12(b)(6).
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Fault and damages after default

Section 1-1-109 requires apportionment of damages even after a default judgment establishes a defendant’s liability.

State Farm Mutual Automobile Insurance Co. v. Colley · filed 1994-03-24(b)(i) or (ii)

This argument ignores the obligation of the state district court to make an allocation of damages after granting a judgment by default. While the judgment entered by the state district court established Dyer’s liability for his actions, as a matter of law, the apportionment of damages required by Wyo.Stat. § 1-1-109(b)(i) or (ii) (1988) remains to be determined.
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Section 1-1-109 allows a defaulted defendant to contest whether the event caused the claimed damages; even a defendant assigned all the fault owes nothing if that fault caused no damages.

Schaub v. Wilson · filed 1998-12-21(b)(ii), (d)

This analysis leads us back, not to the right to litigate proportionate fault, as to which Wilson must be foreclosed since no claim of Schaub’s negligence is available to him, but to the application of Wyo. Stat. § 1-1 — 109(b)(ii), which charges the trial court with determining the total amount of damages. Pursuant to the provisions of Wyo. Stat. § 1 — 1—109(d), Wilson is liable only for the proportion of the total dollar amount determined as damages in the percentage of the amount of fault attributed to him. We do not understand the statute to assume that damages can exist in a vacuum, but the damages the trial court is charged with determining must have been incurred in the event as to which recovery is sought. Even though Wilson is charged with one hundred percent of the fault, if no damages were caused by Wilson’s fault, no recovery can be had.
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Section 1-1-109 makes each actor’s percentage of fault part of the damages calculation, so a defendant in default may participate in discovery and proceedings concerning fault before judgment.

McGarvin-Moberly Construction Co. v. Welden · filed 1995-06-29

Because, by our comparative negligence statute, the question of fault is inextricably intertwined with the amount of damages that may be awarded against any defendant, we perceive the trial court’s initial ruling that McGarvin-Moberly could “participate fully in the discovery process and on issues concerning proximate cause and damages * * * ” was the correct ruling.
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Strict liability claims

Section 1-1-109 does not apply to strict liability claims, so it cannot reduce strict liability damages according to the plaintiff's share of fault.

John Zierke and Debbie Zierke v. Agri-Systems · filed 1993-05-03

We reject this argument, based upon the Wyoming Supreme Court's recent and clear pronouncements on the applicability of § 1-1-109 to strict liability in Phillips; Schneider Nat'l, Inc. v. Holland Hitch Co., 843 P.2d 561, 567, 583 (Wyo.1992); and Jackson State Bank v. King, 844 P.2d 1093, 1095, 1097 (Wyo.1993).
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54 more cases cited this section only in passing

These cases mention the section without interpreting it (a string cite, a footnote, background). Listed so you can see the full citation record, not just the annotated rulings.

Wellborn v. Mountain Accessories, the statute is cited only to describe the reduction of the jury’s damages award in the procedural history; the court does not interpret or apply § 1-1-109 in its own holding. opinion →
Stroup v. Oedekoven, the court mentioned § 1-1-109 in addressing the comparative-fault issue but expressly declined to decide whether the decedent’s fault should be considered in this type of case; it resolved the appeal on harmless-error grounds because the decedent was assigned 0% fault. opinion →
Call v. State Industries, the court recited the parties’ undisputed description of § 1-1-109 as background for reviewing the denial of a comparative-fault jury instruction. It did not interpret or independently decide what subsection (d) requires; the holding concerned the insufficiency of evidence to warrant the instruction. opinion →
Greenwalt v. Ram Restaurant Corp. of Wyoming, the court mentions § 1-1-109 only while rejecting the plaintiffs’ argument about the legislative objective of a different statute, Wyo. Stat. Ann. § 12-8-301. It does not construe or decide the application of § 1-1-109. opinion →
Cathcart v. State Farm Mutual Automobile Insurance Company, the statute appears only in State Farm’s perfunctory argument. The court expressly declined to address whether comparative fault applies in a bad faith case, so it made no holding about § 1-1-109. opinion →
Foote v. Simek, the statute is cited only in a footnote as part of a general string cite for further explanation of related doctrines. The court does not discuss, construe, or apply § 1-1-109. opinion →
Muller v. Jackson Hole Mountain Resort, the opinion mentions § 1-1-109 only in quoting W.S. 1-1-123(c) and in a footnote identifying it as Wyoming’s comparative fault statute; the court did not construe, apply, or decide any issue under § 1-1-109. opinion →
Cramer v. Powder River Coal, LLC, the court merely reports that the district court denied recovery under the comparative-fault statute after the jury allocated Mr. Cramer more than 50% of the fault. It does not interpret, explain, or independently apply § 1-1-109. opinion →
Egbert v. NISSAN MOTOR CO., LTD., the opinion cites Wyo. Stat. Ann. § 1-1-109 only in a footnote listing statutes from states that have abolished joint and several liability. It does not construe, apply, or decide anything about the meaning or requirements of Wyoming’s statute. opinion →
Lake v. D & L LANGLEY TRUCKING, INC., the statute is quoted in a footnote and mentioned to explain the procedural consequence of the jury's finding that Lake was 86% at fault; the court did not interpret, analyze, or decide any issue about § 1-1-109(b). opinion →
PENNANT SERVICE CO., INC. v. True Oil Co., the statute appears only in a dissenting footnote as a citation supporting the statement that True faced liability only for damages attributable to its own fault; the opinion does not construe or apply § 1-1-109. opinion →
In Re Game Tracker, Inc., the court cites § 1-1-109(b), (d)-(e) in a footnote as an example of other jurisdictions' proportional comparative-negligence statutes. It applies Maine law and does not construe or decide anything about the Wyoming statute. opinion →
Shafer v. TNT Well Service, Inc., the statute is mentioned only in describing the Shafers' argument that TNT's fault should be apportioned under Wyoming comparative fault law. The court does not interpret, apply, or decide anything about § 1-1-109; it decides the appeal on negligent supervision and negligent entrustment issues. opinion →
Carson v. State of Wyoming, Ex Rel., Wyoming Workers' Safety and Compensation Division, the court cites § 1-1-109 only as authority for the general proposition that fault is fundamental in tort law; it does not interpret, apply, or decide anything about the statute. opinion →
Wood v. CRST Expedited, Inc., the statute is discussed in the dissent's analysis of proximate cause and appears in a supporting footnote citation, but the majority's disposition addressed proximate cause in the negligence claim and did not adopt a construction or application of Wyo. Stat. Ann. § 1-1-109. opinion →
Justin Nigg and Lorraine Nigg v. Marriott Hotel Management Company (Virgin Islands), Inc., CREF3 USVI Hotel Owner Inc.,, the court cited Wyoming's statute only as one item in a string cite showing that other jurisdictions apply the sunshine rule; it did not interpret or decide anything about § 1-1-109. opinion →
McIntyre v. Balentine, the Wyoming statute is cited only in a footnote listing comparative-fault jurisdictions and statutes; the court does not construe, apply, or decide anything about § 1-1-109(d). opinion →
Fernanders v. MARKS CONST. OF SC, INC., the statute appears only in a footnote list of authorities identifying states that abolished joint and several liability; the court does not interpret, apply, or adopt anything about § 1-1-109(e). opinion →
Fernanders v. Marks Construction of South Carolina, Inc., the statute appears only in a string citation listing jurisdictions said to have abolished joint and several liability; the court neither interprets nor applies Wyoming law. opinion →
Bradley v. Appalachian Power Co., the court decided its own comparative negligence rule; it listed the Wyoming section among other states’ statutes without deciding that section’s rules. opinion →
Van Horn v. William Blanchard Co., the Wyoming citation appears only in a dissenting footnote; the court's decision concerns New Jersey law. opinion →
State Ex Rel. Peterson v. District Court of the Ninth Judicial District, the court cites the section as an example of Wyoming law while deciding whether the district court has jurisdiction; it does not decide the section’s rules. opinion →
Scott v. Rizzo, the Wyoming statute appears only in a footnote listing jurisdictions that adopted comparative fault; the court makes no decision about that section. opinion →
Venes v. Steven R. Heck and Grolier Interstate, Inc., the cited sentence reports the reduction of the jury’s verdict below; the appellate court does not decide a rule of this section. opinion →
Gustafson v. Benda, the court cites § 1-1-109 only in a list of statutes and does not decide any rule of that section. opinion →
Hilen v. Hays, the court lists the Wyoming statute in a survey of other states; it does not decide any rule of that section. opinion →
Langley v. Boyter, the Wyoming statute appears only in a list of other jurisdictions’ authorities, not in this court’s decision about that section. opinion →
Kriz v. Buckeye Petroleum Co., Inc., the court decides the application of Arizona’s statute. Its footnote cites the Wyoming Act as a comparison but does not decide the rules of § 1-1-109. opinion →
Goggins v. Harwood, the court uses comparative negligence as an analogy while deciding whether an assault-and-battery verdict form was erroneous; it does not decide a rule under this section. opinion →
Burton v. Fisher Controls Co., the court applies pre-amendment comparative-negligence law to a 1977 injury; it does not decide a rule of § 1-1-109. opinion →
Elder v. Orluck, the court cites Wyoming’s statute to compare its wording with Pennsylvania’s, but decides the rule under Pennsylvania law. opinion →
Coryell v. Town of Pinedale, the statement about § 1-1-109 recounts an earlier holding; this court decides whether § 1-1-114 permits the jury instruction. opinion →
Harmon v. Town of Afton, the court decides the instruction issue under § 1-1-114; its discussion of § 1-1-109 reports the appellants’ argument. opinion →
M & T Chemicals, Inc. v. Barker Industries, Inc., the court decided South Carolina’s contribution rule; it mentioned the Wyoming statute only in a survey footnote. opinion →
Seaton v. State Highway Commission, District No. 1, the court mentions the later amendment but does not decide its rules for this accident. opinion →
Dellapenta v. Dellapenta, the court expressly says the comparative negligence statute is not involved and decides the seat belt evidence issue without construing it. opinion →
Sullivan v. Scoular Grain Co. of Utah, the Utah court lists Wyoming’s statute and another court’s decision in an appendix; it does not decide the Wyoming section’s rules. opinion →
Halpern v. Wheeldon, the court decides the Recreation Safety Act and expressly says the comparative negligence statute does not affect its analysis. opinion →
Olsten Staffing Services, Inc. v. D.A. Stinger Services, Inc., the court resolved disqualification under Rule 40.1(b)(1) and did not decide whether § 1-1-109 applies to a default hearing. opinion →
Turcq v. Shanahan, the court mentions the comparative-fault reduction while deciding whether the evidence supported the damages award; it does not decide a rule of § 1-1-109. opinion →
Keller v. Merrick, the court decides the Recreation Safety Act’s effect on a breach of warranty claim; § 1-1-109 appears only in the quoted text of another section. opinion →
Madsen v. Wyoming River Trips, Inc., No. The court decides the Recreational Safety Act’s inherent-risk rule. Section 1-1-109 appears in the quoted text of a different section, and the court does not decide its comparative-negligence rules. opinion →
Cooperman v. David, the court decides the Recreation Safety Act’s inherent-risk rule. Section 1-1-109 appears only in the quoted provision preserving certain negligence actions. opinion →
Carden v. Kelly, the court decides whether the injury involved an inherent risk under the Wyoming Recreation Safety Act; it does not decide any rule of § 1-1-109. opinion →
Estate of Harshman v. Jackson Hole Mountain Resort Corp., the court decides whether the injury resulted from an inherent risk under the Wyoming Recreation Safety Act. Section 1-1-109 appears only as a cross-reference; the court does not decide its comparative-negligence rules. opinion →
Fetzer v. J.D. Dayley & Sons, Inc., the court dismissed the comparative-fault appeal at Dayley’s request without deciding any rule of § 1-1-109. opinion →
Shipler v. General Motors Corp., this is the Nebraska court reporting the Wyoming court’s decision, not deciding § 1-1-109 itself. opinion →
Jackson Hole Mountain Resort Corp. v. Rohrman, the court decides the Recreational Safety Act’s inherent-risk rules. Section 1-1-109 appears only in the quoted text of another section; the court does not decide its comparative-negligence rules. opinion →
Muller v. Jackson Hole Mountain Resort Corp., the court decided the Recreational Safety Act’s inherent risk rules; § 1-1-109 appears only as a cross-reference and its comparative negligence rules were not decided. opinion →
Garcia v. Nationwide Mutual Insurance, the court decides the meaning of the uninsured motorist policy and insurance regulations, not the rules of § 1-1-109. The citation appears in Garcia’s proposed reading of the policy. opinion →
Beckwith v. Weber, the court decides whether the injury resulted from an inherent risk under the Recreation Safety Act; it does not decide any rule of § 1-1-109. opinion →
Creel v. L & L, Inc., the reference to § 1-1-109 appears in the district court’s reasoning quoted by the appellate court, not in the appellate court’s own decision about that section. opinion →
Kovnat v. Xanterra Parks and Resorts, the court decides the inherent-risk rule under § 1-1-123. Section 1-1-109 appears only as a cross-reference; the court does not decide its comparative-negligence rules. opinion →
Anthony v. Xanterra Parks & Resorts, Inc., the court decides whether the injury arose from an inherent risk under the Wyoming Recreation Safety Act; § 1-1-109 appears only in a quoted cross-reference. opinion →

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