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You can search the entire site. or go to the recent opinions, or the chronological or subject indices. State of Alaska, Workers' Compensation Benefits Guaranty Fund v. Virgil A. Adams, Michael A. Heath D/B/A O&M Enterprises, and Michael A. Heath Trust (10/7/2022) sp-7624

State of Alaska, Workers' Compensation Benefits Guaranty Fund v. Virgil A. Adams, Michael A. Heath D/B/A O&M Enterprises, and Michael A. Heath Trust (10/7/2022) sp-7624

             Notice:   This opinion is subject to correction before publication in the P                                       ACIFIC  REPORTER .   

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                           THE SUPREME COURT OF THE STATE OF ALASKA                                                        



STATE  OF  ALASKA,  WORKERS'                                                   )  

                                                                                                                    

COMPENSATION  BENEFITS                                                         )     Supreme Court N                         

                                                                                                                       o. S-17918  

GUARANTY  FUND,                                                                )  

                                                                               )                                       

                                                                                     Alaska Workers' Compensation  

                                       Appellant,                                                                                       

                                                                               )     Appeals Commission No.  15-029  

                                                                               )  

             v.                                                                )     O P I N I O N  

                                                                                                              

                                                                               )  

VIRGIL  A.  ADAMS,  MICHAEL  A.                                                )     No. 7624 - October 7, 2022  

                                                                                                                                   

HEATH  d/b/a  O&M  ENTERPRISES,   )  

and  MICHAEL  A.  HEATH  TRUST,                                                )  

                                                                               )  

                                       Appellees.                              )  

                                                                               )  



                          Appeal from  the  Alaska  Workers'  Compensation  Appeals  

                                                             

                                                                                                                               

                          Commission.  

                                                     



                          Appearances:  Siobhan McIntyre and Kimberly D. Rodgers,  

                                                                                                                              

                          Assistant Attorneys General, Anchorage, and TregR. Taylor,  

                                                                                                                                 

                          Attorney General, Juneau, for Appellant.   Charles W.  Coe,  

                                                                                                                                     

                          Law  Office  of  Charles  W.  Coe,  Anchorage,  for  Appellee  

                                                                                                                              

                          Virgil A. Adams.                     No appearance by Appellees Michael A.  

                                                                                                                                          

                          Heath Trust and Michael A. Heath d/b/a O&M Enterprises.  

                                                                                                                                                



                          Before:             Winfree,   Chief  Justice,  Maassen,  Carney,  and  

                                                                                                                                       

                          Henderson, Justices.  [Borghesan, Justice, not participating.]  

                                                                                                                    



                          CARNEY, Justice.  

                                                 


----------------------- Page 2-----------------------

I.         INTRODUCTION
  



                      The Alaska Workers' Compensation Act does not allow compensation for  

                                                                                                                                            



an  injury  proximately  caused  by  the  injured  employee's  intoxication.                                                The  Alaska  

                                                                                                                                     



Workers' Compensation Board decided that a carpenter who admitted using alcohol and  

                                                                                                                                           



cocaine before his injury had a compensable disability because it determined the accident  

                                                                                                                                   



would   have  happened  regardless  of  his  drug  and  alcohol  use.                                                  The  Workers'  

                                                                                                                                



Compensation Benefits Guaranty Fund, which is responsible for payment if an employer  

                                                                                                                                 



defaults, appealed, arguing that the employee's intoxication barred compensation.  The  

                                                                                                                                          



Workers' Compensation Appeals Commission affirmed the Board's decision because  

                                                                                                                                   



substantial evidence supported it.  We affirm the Commission's decision.  

                                                                                                           



II.        FACTS AND PROCEEDINGS  

                                    



                      This is the second appeal stemming from Virgil Adams's 2011 work-related  

                                                                                                                            



accident; we remanded the case to the Commission to consider the Fund's intoxication- 

                                                                                                                            

defense appeal, which the Commission had not considered.1                                              Facts are taken from our  

                                                                                                                                           



earlier decision, with additional details relevant to the intoxication issue drawn from the  

                                                                                                                                            



record.  



                      Adams fell about 30 feet while attempting a roof repair on Michael Heath's  

                                                                                                                                    

rental property after cribbing underneath a ladder he was using gave way.2                                                      Adams is  

                                                                                                                                              

now permanently and totally disabled.3   Adams admitted drinking beer and using cocaine  

                                                                                                                                    



           1          Adams v. State, Workers' Comp. Benefits Guar. Fund                                          , 467 P.3d 1053,       

1055, 1064 (Alaska 2020).         



           2          Id.  at 1057.  

                                 



           3          Id.  at 1055, 1057.  

                                            



                                                                      -2-                                                               7624
  


----------------------- Page 3-----------------------

                                4  

before the accident.               He testified that Heath supplied the cocaine, and Adams described                            

                                                                                                                                    5     He  

the   job   site   as   "a   revolving frat               house,"   with   beer   readily   available   on   site.      

acknowledged that he had not inspected the cribbing before climbing the ladder.6  

                                                                                                                         



                      Neither  Heath  nor  the  trust  that  owned  the  property  had  workers'  

                                                                                                                                

compensation coverage.7                    Adams filed a workers' compensation claim and later joined  

                                                                                                                                     



the Fund as a party to the claim; the Fund controverted benefits based on Adams's  

                                                                                                                                 

intoxication.8         During litigation the Fund raised additional defenses, and the Board held  

                                                                                                                                         

one hearing on all of them.9                    The Fund presented testimony from "a doctor certified to  

                                                                                                                                            

review drug and alcohol tests,"10  Dr. Andris Antoniskis.  Adams called as a witness the  

                                                                                                                                           



paramedic who treated him at the job site.  

                                                                



                      The paramedic testified that Adams admitted having three beers, but that  

                                                                                                                                         



he did not think Adams looked intoxicated.   The paramedic did not observe bloodshot  

                                                                                                                                



eyes and said Adams was not slurring his speech.  The paramedic was concerned about  

                                                                                                                                       



Adams's alcohol consumption because of alcohol's interaction with pain medication the  

                                                                                                                                           



paramedic planned to administer.  He gave Adams a small amount of medication.  After  

                                                                                                                                        



           4          Id.  at   1057.  



           5          Id.  at   1056-57.  



           6          Id.  at   1057.  



           7          Id.  at   1055.  



           8          Id.   at   1057;   see   AS   23.30.235(2)   (disallowing   compensation   for   injury  



"proximately  caused  by  intoxication  of  the   injured   employee   or  proximately   caused  by  

the  employee  being  under  the  influence  of  drugs  unless  the  drugs  were  taken  as  

                                                                                                                                           

prescribed by the employee's physician").  

                                                  



           9  

                                                         

                      Adams , 467 P.3d at 1057.  



           10         Id.  



                                                                      -3-                                                               7624
  


----------------------- Page 4-----------------------

seeing no adverse interaction, he administered more of the medication shortly afterward.                                                                                                              



Emergency room                          records showed                      that Adams had                      alcoholon               his breath when he arrived;                                   



                                                                                                                                                                                                  11  

a blood test taken at 6:01 p.m. showed an alcohol level of 49 milligrams per deciliter.                                                                                                               



A urine drug screen was positive for cocaine but no other drug.  

                                                                                                                                                



                              Dr. Antoniskis wrote two reports based on records made available to him.  

                                                                                                                                                                                                      



His  March  2013  report  did  not  reach  useful  conclusions  because  he   had  little  

                                                                                                                                                                                         



information.  With respect to the positive test for cocaine, Dr. Antoniskis said there was  

                                                                                                                                                                                           



"no way to determine impairment based on a urine drug test alone."  He indicated the  

                                                                                                                                                                                             



only inference he could make from the information he had was "that the cocaine was  

                                                                                                                                                                                           



used somewhere within 48 to 72 hours" of urine sample collection.   The information  

                                                                                                                                                                          



provided about the alcohol screening was equally scant: "no units of measure[,] . . . time  

                                                                                                                                                                                        



of collection, . . . []or manner of collection" accompanied the report.  Dr. Antoniskis's  

                                                                                                                                                                        



first report nonetheless concluded Adams would have had "some degree of impairment"  

                                                                                                                                                                        



from alcohol.  

                                



                              Dr. Antoniskis's July 2015 addendum had more specific conclusions about  

                                                                                                                                                                                        



alcohol use because he had more records available.   He estimated that Adams would  

                                                                                                                                                                                      



have had a blood alcohol level of 71.5 milligrams per deciliter at the time of the accident  

                                                                                                                                                                                  



and that with this level of blood alcohol Adams "would have had impairment of balance  

                                                                                                                                                                                   



and speech, reaction time, and judgment."  The addendum did not address cocaine use.  

                                                                                                                                                                                                      



Dr.  Antoniskis  "fe[lt]  that  Mr.  Adams'[s]  injuries  [were]  in  large  part  due  to  his  

                                                                                                                                                                                            



impairment,"  but aside from general statements about increased risk, he did not explain  

                                                                                                                                                                                    



this conclusion.  

                                     



                              Dr.  Antoniskis  testified  at  the  hearing,  giving  more  detail  about  both  

                                                                                                                                                                                         



               11             The amount is equivalent to a breath alcohol measurement of .049.                                                                                             Cf.  



AS 28.35.030(a)(2) (setting out prohibited levels of .08 for operating motor vehicles in                                                                                                        

both blood and breath units).                                      



                                                                                               -4-                                                                                        7624
  


----------------------- Page 5-----------------------

                                                                                                                                

cocaine use and calculations of blood  alcohol level.   He indicated that "the effects of  



                                                                                                                   

cocaine typically last about 20 or 30 minutes from the standpoint of causing stimulation  



                                                                                                                 

and agitation" and that mixing alcohol and cocaine "would certainly impair somebody's  



                                                                                                                      

judgment more."  He said that a person's "judgments and alertness could be impacted  



                                                                                                                       

mixing  the  two  together"  and  -  specifically  about  Adams  -  that  using  cocaine  



                                                                                                                                    

"certainly could have had an impact also on  his  level of impairment and judgment."  



                                                                                                                     

When asked whether Adams's intoxication could "have impaired his judgment regarding  



                                                                                                                             

safety precautions like checking the ladder," Dr. Antoniskis agreed that "[t]here's a very  



                                                                                                                          

good probability that the alcohol and the cocaine use would have had a negative effect  



                                                            

on the judgment of not checking that."  



                                                                                                                              

                    On cross-examination Adams made the point that Dr. Antoniskis did not  



                                                                                                                        

know when  Adams  actually consumed the alcohol, which could affect blood alcohol  



                                                                                                                              

calculations.   Dr. Antoniskis said alcohol will not show up in a blood  test until it has  



                                                                                                                               

been  absorbed  through  the  digestive  system,  which  happens  within  60  minutes  of  



                                                                                                                            

ingestion.  Dr. Antoniskis's calculation assumed Adams's blood alcohol level had been  



                                                                                                                                

falling the entire time period from the accident to the blood draw in the hospital, but he  



                                                                                                                              

acknowledged that he did not know when Adams had his last drink.   This raised the  



                                                                                                                             

question  whether  Adams's  blood  alcohol  level  might  have  peaked  later  than  Dr.  



                                                                                                                         

Antoniskis assumed.  Dr. Antoniskis said that he had nothing to show whether Adams  



                                                                                                                        

had developed a tolerance for alcohol and testified that nothing in the EMT  records  



                                                                                                           

showed that Adams was intoxicated when first responders attended to him.  



                                                                                                                 

                    In its closing argument the Fund emphasized testimony about intoxication,  



                                                                                                                   

but it did not discuss how intoxication proximately caused the injuries.   Its prehearing  



                                                                                                                

memorandum  had  one  paragraph  about  proximate  cause  and  Adams's  intoxication,  



                                                                                                                  

which offered several short arguments about causation without focusing on one.  



                                                                                                                  

                    The Board rejected all of the Fund's defenses, including the intoxication  



                                                                -5-                                                         7624
  


----------------------- Page 6-----------------------

                                                                                                                          

defense, in an interlocutory decision.   The Board found Adams credible.   The Board  



                                                                                                                        

summarized Dr. Antoniskis's testimony as extrapolating that Adams's "blood alcohol  



                                                                                                                               

level was .071 at the time of the injury" even though Dr. Antoniskis conceded that "he  



                                                                                                                                     

had no way of knowing when [Adams] drank his last beer, or the strength of the beers."  



                                                                                                                   

The Board characterized Dr.  Antoniskis's testimony about "the level of impairment  



                                                                                                                            

caused by" Adams's cocaine use as "less certain,"  saying that Dr.  Antoniskis "was  



                                                              

unable to give a concise opinion on that point."  



                                                                                                                        

                    The Board  listed factors that Dr. Antoniskis agreed might have affected  



                                                                                                                      

Adams's  intoxication  level;  noted  that  "Dr.  Antoniskis  could  not  say  with  certainty  



                                                                                                                          

whether [Adams's] blood alcohol level was still rising at the time his blood was drawn,  



                                                                                                                             

or had begun to decline"; and called Dr. Antoniskis's "opinion on . . . [Adams's] level  



                                                                                                                     

of impairment . . . , at best, an educated guess."  Based on its own experience, judgment,  



                                                                                                                                 

and observations, the Board found that different people "experience different levels of  



                                                                                                                                

impairment  from  consuming  the  same  number  of  alcoholic  drinks,  depending  on  



                                                                                                                           

tolerance," with some "unable to . . . complete tasks requiring motor skills, while others  



                                                                                                                 

might perform with little or no visible impairment."  The Board found that "intoxication  



                                                                                                                           

was not the reason for the fall" because the fall resulted from the cribbing giving way.  



                                                                                                                             

                    In its analysis,  the Board said there was "no evidence  alcohol or drug  



                                                                                                                              

impairment played any role in the failed cribbing" that caused the fall and that there was  



                                                                                                                             

"no logical connection."  As a result, the Board thought Dr. Antoniskis's opinions were  



                                                                                                                          

not dispositive, and it gave those opinions less weight.  The Board decided "[t]he weight  



                                                                                                                             

of the evidence supports a conclusion that loose cribbingsupportingthe ladder gave way,  



                                                                                                                                  

which would have caused anyone to fall" and concluded that intoxication was not a  



                                             

proximate cause of Adams's accident.  



                                                                                                                              

                    In June 2017 the Board issued its finaldecision, concluding that Adams was  



                                                                                                                                  

entitled to most of the compensation benefits he sought and that Heath, or the Fund if  



                                                                -6-                                                         7624
  


----------------------- Page 7-----------------------

Heath defaulted, was entitled to an offset for Social Security disability benefits.                                                                                     



                            The Fund revived an appeal it                                        had   filed after the interlocutory decision                         



about the affirmative defenses, setting out two grounds for appeal:                                                                            (1) whether Heath           



and his company were engaged in a business or industry and thus were employers; and                                                                                             



                                                                                                                                          12  

(2)  whether Adams's intoxication proximately caused his injuries.                                                                            



                            The Commission reversed the Board's decision about Heath's status as an  

                                                                                                                                                                                   



employer but declined to address the intoxication issue because that reversal made the  

                                                                                                                                                                                 

issue  moot.13                   Adams  appealed  to  us;  we  reversed  the  Commission's  decision  and  

                                                                                                                                                                               

remanded the case to the Commission so it could consider the intoxication issue.14  

                                                                                                                                                              



                            On remand the Commission, in a divided decision, affirmed the Board's  

                                                                                                                                                                       



decision that Adams's injury was  not  proximately caused by intoxication, concluding  

                                                                                                                                                                 



that  substantial evidence  in  the  record  supported  the  Board's  determination.                                                                                          The  

                                                                                                                                                                            

Commission  set  out  the  presumption  analysis  applicable  in  intoxication  cases15   and  

                                                                                                                                                                               



agreed with the Board that Adams had attached the presumption his  injury was not  

                                                                                                                                                                                



proximately  caused  by  intoxication.                                            It  also  agreed  that  the  Fund  had  rebutted  the  

                                                                                                                                                                                



presumption with Dr. Antoniskis's testimony and other medical evidence.  

                                                                                                                                                             



                            The Commission first considered whether "the [l]egislature . . . intended  

                                                                                                                                                                  



              12            Adams ,  467  P.3d  at   1059.  



              13            Id.  at   1059-60.  



              14            Id.  at   1064.  



              15            The  Commission  previously  set  out  a  framework  for  what  it  called  negative  



presumptions  in  AS  23.30.120(a),  requiring  an  employer  to  provide  substantial  evidence  

                          

                                                                                                                                                               

to rebut the presumption that the injury was not proximately caused by the employee's  

                                                                                                                                                                                 

intoxication.  See Marsh Creek, LLC v. Benston, AWCAC Dec. No. 101, at 20 (Mar. 13,  

                                                                                                                                                                            

2009),              https://labor.alaska.gov/WCcomm/memos-finals/D_101.pdf                                                                                 (setting             out  

                                                               

framework in intent-to-injure case).  



                                                                                         -7-                                                                                  7624
  


----------------------- Page 8-----------------------

intoxication alone to be a complete defense to a work injury" and decided the legislature                                              



had not intended to deny a claim simply because the employee was intoxicated.                                                                   The  



 Commission relied on the statutory language and                                      Parris-Eastlake v. State, Department          

             16  to conclude that AS 23.30.235(2) requires both that the employee be impaired  

of Law                                                                                                                                   



by  alcohol or  drugs  (or  both)  and  that  the  employee's  impaired  condition  be  "the  

                                                                                                                                                



proximate cause of the injury."  After noting that it was bound by the Board's credibility  

                                                                                                                                        



determinations and the weight the Board gave the evidence, the Commission concluded  

                                                                                                                                       



that substantial evidence in the record supported the Board's decision because the Board  

                                                                                                                                              



determined the accident happened when the cribbing gave way, which was supported by  

                                                                                                                                                    



Adams's credible testimony.  

                                 



                        The Commission discounted the Fund's argument that "Adams would not  

                                                                                                                                                   



have been on the roof nor fallen from the ladder absent his alcohol and cocaine use."  

                                                                                                                                                          



Acknowledging Adams's testimony that he did not check the cribbing before he climbed  

                                                                                                                                           



the ladder, the Commission observed there was no evidence he would have checked it  

                                                                                                                                                      



if he had been sober.  Additionally there was no "evidence that the ladder slipped for any  

                                                                                                                                                  



other reason than the loose cribbing."  

                                                 



                        The dissent would have remanded the case to the Board so that it could  

                                                                                                                                               



"reassess" its decision and explain in more detail its conclusion that the cribbing and not  

                                                                                                                                                   



Adams's intoxication "was the cause of the accident."  The dissent's "assessment of the  

                                                                                                                                                   



 facts" led it to conclude that Adams "was impaired to a degree  that would affect his  

                                                                                                                                                   



judgment  and  balance,  and  that  his  impairment  would  have  been  the  primary,  or  

                                                                                                                                                    



proximate cause, to the circumstances that led to his . . . injuries."  

                                                                                                                      



                        The Fund appeals.  

                                                          



            16  

                                                                

                        26 P.3d  1099 (Alaska 2001).  



                                                                          -8-                                                                   7624  


----------------------- Page 9-----------------------

          STANDARD OF REVIEW
  

III.                                   



                    In an appeal from the Commission, we review the Commission's decision  

                         

                                                                                                                      

and not  the  Board's.17             We  review  de  novo  the  Commission's  legal conclusion that  

                                                                                                                            

                    



substantial evidence supports the Board's factual findings by "independently reviewing  

                                                                                                                    

the record and the Board's factual findings."18                         "Substantial evidence is such relevant  

                                                                                                                      

                                                      

evidence  as  a reasonable  mind  might  accept  as  adequate to  support  a  conclusion."19  

                                                                                                             

                                                                                                                                   

"Whether the quantum of evidence is substantial is a question of law."20                                     "Whether the  

                                                                                                                             

[B]oard made sufficient findings is a question of law that we review de novo."21  

                                                                                                           



IV.	      DISCUSSION  



          A.	       The Commission Correctly Concluded That Substantial Evidence In  

                                                                                                                               

                    The Record Supported The Board's Decision.  

                                                                               



                    The  Alaska  Workers'  Compensation Act  prohibits  compensation  for  an  

                                                                                                                              



injury "proximately caused by intoxication of the injured employee" or "by the employee  

                                                                                                                    

being under the influence of drugs."22                  In Parris-Eastlake, which involved drug use, we  

                                           

                                                                                                                              



concluded that  

                 



                    for  an  injury  to  be  "proximately  caused by  the  employee  

                                                                                                

                    being under  the  influence  of  drugs" within  the  meaning of  

                                                                                                           



          17	       Alaska  Airlines,  Inc.  v.  Darrow,  403  P.3d   1116,   1121  (Alaska  2017).  



          18        Humphrey  v.  Lowe's  Home  Improvement  Warehouse,  Inc. ,  337  P.3d  1174,  



1178  (Alaska  2014).  



          19        Id.  at   1179   (quoting  DeYonge   v.  NANA/Marriott,   1   P.3d   90,   94  (Alaska  



2000)).  



          20        Id.   



          21        Pietro   v.   Unocal   Corp.,   233   P.3d   604,   611   (Alaska   2010)   (alteration   in  



original)  (quoting  Leigh  v.  Seekins F              ord,   136  P.3d  214,  216  (Alaska  2006)).  



          22        AS 23.30.235(2).  

                           



                                                               -9-	                                                        7624
  


----------------------- Page 10-----------------------

                         subsection    .235(2),    the    employee    must    be    "under    the  

                         influence of drugs" in the sense that the employee's mental                                       

                         or physical faculties must be impaired by use of drugs,                                                and  

                         the employee's impaired condition                                must proximately cause             

                         the injury.        [23]  



                                                                                                                                  24  

                                                                                                                                       

We relied on Board decisions about intoxication to interpret the statute. 



                                                                                                                                            

                         The Act contains a related presumption, providing in pertinent part:  



                                                                                                                                 

                                     In a proceeding for the enforcement of a  claim for  

                                                                                                                    

                         compensation . . . it is presumed, in the absence of substantial  

                                                                                                                                

                         evidence  to  the  contrary,  that  .  .  .  the  injury  was  not  

                                                                                                                         

                         proximately  caused  by   the   intoxication  of   the  injured  

                                                                                                                            

                         employee  or  proximately  caused  by  the  employee  being  

                                                                                                                                   

                         under the influence of drugs unless the drugs were taken as  

                                                                                                  [25]  

                                                                                

                         prescribed by the employee's physician. 



                                                                                                                                              

An  employer  has  the  burden  of  proving  an  affirmative  defense  in  a  workers'  



                                   26  

                                                                                                                                                

compensation case.                      The Fund acknowledges it had the burden of provingthat Adams's  



                                                                                                                                           

injury was proximately caused by his intoxication.  Because two factors - intoxication  



                                                                                                                                                     

and proximate cause - must be shown, if the Board concluded the Fund failed to prove  



                                                                                                                                               

either factor, the Board could reject the defense.   The Commission therefore correctly  



                                                                                                                                                   

determined that denying Adams compensation for a work-related injury required finding  



                                                                                                                                                                 

both that Adams was intoxicated and that the intoxication proximately caused the injury.  



                                                                                                                                              

                         The Fund asserts the Commission "narrowed the definition" of proximate  



            23           26  P.3d   1099,   1104  (Alaska  2001)  (emphasis  added).  



            24          Id.  at   1103-04.  



            25  

                                                                

                         AS 23.30.120(a)(3).  



            26  

                                                                                                                                                          

                        Anchorage Roofing Co. v. Gonzales, 507 P.2d 501, 504 (Alaska 1973); see  

                                                                                                                                                        

also Egemo  v.  Egemo  Constr.  Co.,  998  P.2d  434,  438  (Alaska  2000)  (holding that  

                                                                                                                                                             

                                         

employer had burden of proof "to establish the affirmative defense of failure to file a  

             

timely claim").  



                                                                            -10-                                                                      7624
  


----------------------- Page 11-----------------------

cause, but the Commission never attempted to define the term.                                                                          The Fund sets out the                     



legal standard for proximate cause we articulated in                                                           State v. Abbott                  ,   which requires a                 



 showing that "but for" an act or omission "the accident would not have happened" and                                                                                           



that the act or omission "was so important in bringing about the injury that reasonable                                                                          

                                                                                                                                              27    Adams does not  

 [people] would regard it as a cause and attach responsibility to it."                                                                                                           



dispute this definition of proximate cause but contends that proximate cause is a question  

                                                                                                                                                                      



for the trier of fact.  We therefore evaluate the evidence using the legal standard from  

                                                                                                                                                                             



Abbott .  



                             The Fund argues that the Commission applied the law too stringently to the  

                                                                                                                                                                                  



facts  of  the  case  and  that  the  evidence  detracting from  the  Board's  decision  is  so  

                                                                                                                                                                                  



disproportionate to  the evidence supporting it as to make the evidence supporting the  

                                                                                                                                                                                 

                                                                                                                                                       28  has been that  

decision not substantial.  The Fund's main theory of causation on appeal 

                                                                                                                                                                                



Adams was intoxicated so that his judgment was impaired when he began the roof repair.  

                                                                                                                                                                                          



It asserts that his impaired judgment caused him to fail to inspect the cribbing closely  

                                                                                                                                                                         



before using the ladder.  In its brief before us the Fund amplifies the cribbing's potential  

                                                                                                                                                                      



danger by discussing weather conditions,  which it implies would have increased the  

                                                                                                                                                                                 



likelihood  of  instability.                            We  agree  with  Adams  that  the  Fund's  theory  necessarily  

                                                                                                                                                                



assumes the cribbing's weakness was apparent or observable before the collapse because  

                                                                                                                                                                       



otherwise inspecting the cribbing would have had no effect on the accident.  The Fund  

                                                                                                                                                                             



tries to cast doubt on findings underpinning the Board's analysis, including a suggestion  

                                                                                                                                                                 



that Adams in fact lost his balance, and asserts the Board needed to make more explicit  

                                                                                                                                                                         



              27             State v. Abbott                , 498 P.2d 712, 727 (Alaska 1972).                                           



              28             The Fund did not clearly set out a specific causation analysis before the  

                                                                                                                                                                                 

Board.  The Fund's argument merely set out information about the weather, the pitch and  

                                                                                                                                                                                 

composition of the roof,  testimony about inspecting the cribbing,  and  a reference to  

                                                                                                                                                                                   

Adams's experience in construction and safety precautions.  

                                                                                                                               



                                                                                        -11-                                                                                  7624
  


----------------------- Page 12-----------------------

                                                                                                                                

findings  about  Adams's  intoxication.                      Adams  emphasizes  the  Board's  findings,  its  



                                                                                                                                

authority  to  weigh  evidence  and  determine  credibility,  and  the  factual  nature  of  



                                                                                                                        

proximate cause determinations to argue that substantial evidence supports the Board's  



               

decision.  



                                                                                                                             

                     1.	       The Board was entitled to give Dr. Antoniskis's testimony little  

                              weight.  



                                                                                                                               

                    The  Fund  contends  the  Commission  erroneously  failed  to  reverse  the  



                                                                                                                      

Board's decision to discount Dr. Antoniskis's testimony.  Characterizing the testimony  



                                                                                                                           

as "unequivocal and supported by medical evidence," the  Fund  maintains the Board  



                                                                                                                                

"mischaracterize[d]" the testimony and discounted it solely because the Board saw the  



                                                                                                                       

testimony as uncertain.  Adams responds that the Board properly evaluated the evidence  



                                                                                                                                

and that the Commission followed the statute when reviewing the Board's findings.  



                                                                                                                     

                    As Adams notes, Dr. Antoniskis did not give an opinion about proximate  



                                                                                                                        

cause.  He gave an opinion about Adams's blood alcohol level at the time of the accident  



                                                                                                                         

and said that level would affect his judgment.  Dr. Antoniskis added that using cocaine  



                                                                                                                        

as Adams described would,  in  combination with the alcohol, have a further negative  



                                                                                                                               

impact  on  Adams's  judgment.                     The  Board  decided,  in  light  of  its  finding  that  the  



                                                                                                                     

cribbing's failure caused the accident,  that Dr.  Antoniskis's opinion about Adams's  



                                                                                                                        

intoxication  level was  "not  dispositive"  and  gave  it  "less  weight."                                We  see  nothing  



                           

erroneous in this analysis.  



                                                                                                                 

                    The Fund's assertions about the clarity and certainty of Dr. Antoniskis's  



                                                                                                                

opinions  gloss  over  Adams's  and  the  Board's   questions  about  the  assumptions  



                                                                                                                       

underlying those opinions.  To estimate Adams's alcohollevel at the time of the accident,  



                                                                                                                              

Dr. Antoniskis used known facts - the approximate time of the accident and the time  



                                                                                                                              

and  results  of  the  blood  test  -  but  also  made  assumptions.                                  From  hospital  and  



                                                                                                                                

emergency response records, Dr. Antoniskis knew about 90 minutes passed between the  



                                                               -12-	                                                        7624
  


----------------------- Page 13-----------------------

911 calland                                      the blood test.   Dr. Antoniskis admitted he did not know when Adams drank  



the alcohol or had his last drink, but he assumed Adams's blood alcohol was falling the                                                                                                                                                                                                                                                                   



entire time period between the accident and the blood test, indicating it had peaked at the                                                                                                                                                                                                                                                               



time of or prior to the accident.                                                           



                                                        Dr. Antoniskis testified that alcohol cannot be measured by a blood test                                                                                                                                                                                                                        



until it has been absorbed through the digestive system, which can take up to 60 minutes                                                                                                                                                                                                                                               



but more typically takes 45 to 50 minutes.                                                                                                                                      His assumption that Adams's blood alcohol                                                                                                                



had peaked by the time of the accident thus appears to rest on an additional assumption                                                                                                                                                                                                                                 



about when Adams drank because otherwise there is no way to know whether the alcohol                                                                                                                                                                                                                                                      

                                                                                                                                                                                                                                                                                                                29            The Fund  

had been absorbed and was causing impairment at the time of the fall.                                                                                                                                                                                                                                                                           



acknowledges there is no evidence about either when Adams consumed the three beers  

                                                                                                                                                                                                                                                                                                                                                 



he reported drinking or how fast he drank them.  As a result, the Fund's reliance on Dr.  

                                                                                                                                                                                                                                                                                                                                                         



Antoniskis's statement  that  Adams's blood alcohol level had peaked by the time the  

                                                                                                                                                                                                                                                                                                                                                         



blood was drawn is unavailing; the level needed to have peaked  at  the time of the  

                                                                                                                                                                                                                                                                                                                                                         



accident for the calculation to be accurate.  Adams testified he was "on [his] third" beer  

                                                                                                                                                                                                                                                                                                                                                     



when he climbed the ladder.   The Board could infer from this testimony that Adams  

                                                                                                                                                                                                                                                                                                                                         



continued to drink while he was working.  

                                                                                                                                      



                                                        The Fund attempts to shift to Adams the burden of providing additional  

                                                                                                                                                                                                                                                                                                                              



                            29                          We agree with the Fund that the Board incorrectly wrote that Dr. Antoniskis                                                                                                                                                                                          

could not say whether Adams's blood alcohol level "was still rising at the time his blood                                                                                                                                                                                                                                                      

was drawn."                                            No evidence suggested that Adams consumed alcohol in the 90 minutes                                                                                                                                                                                                            

between the accident and the blood draw.                                                                                                                                           In light of Dr. Antoniskis's testimony that                                                                                                                        

alcoholis    absorbed within 60 minutes of consumption, the absence of                                                                                                                                                                                                                    evidence of further  

alcohol consumption indicates Adams's blood alcohol level had peaked by the time of                                                                                                                                                                                                                                                                          

the blood draw.                                                    But this error does not undermine the Board's analysis.                                                                                                                                                                               Dr. Antoniskis   

could not say with certainty whether the blood alcohol level had peaked                                                                                                                                                                                                                            at the time of the                                     

accident,   even   though   he   assumed   this   to   be   the   case   and   that   assumption   was  

fundamental to his calculation.                                                



                                                                                                                                                                            -13-                                                                                                                                                                     7624
  


----------------------- Page 14-----------------------

evidence   about   his   alcohol   consumption   by   contending   no   evidence   supports   the  



possibility that Adams drank three beers in rapid succession immediately before climbing                                                      



toward the chimney. But the Fund, not Adams, had the burden of proving the affirmative                                                   

                                            30  and nothing in the record supports the Fund's theory.   The  

defense it was asserting,                                                                                                                            



Fund deposed Adams twice  and cross-examined him at the hearing, so the Fund had  

                                                                                                                                                      



ample opportunity to elicit this important information from Adams.  

                                                                                                                          



                        Absent  a  more  detailed  time  line   of   the  day's  events  or  a  more  

                                                                                                                                                  



particularized opinion about how Adams's intoxication resulted in his injury, the Board  

                                                                                                                                                  



could reasonably give less weight to Dr.  Antoniskis's testimony.                                                          The  Commission  

                                                                                                                                     



appropriately accepted the Board's assessment and the weight the Board assigned to the  

                                                                                                                                                       



opinion.  

                 



                        2.	         The Commission correctly deferred to the Board's assessment  

                                                                                                                                        

                                    of witness credibility.  

                                                         



                        The  Fund  sets  out  facts  and  inferences  favorable  to  its  position  and  

                                                                                                                                                     



concludes that based on those favorable facts and inferences "a reasonable person would  

                                                                                                                                                  



consider Mr. Adams's intoxication a cause of his injury."  But this is not the standard we  

                                                                                                                                                        



use  to  evaluate  whether  substantial evidence  supported  the  Board's  decision.                                                                 We  

                                                                                                                                                     



consider whether facts exist in the record that support the Board's decision; we do not  

                                                                                                                                                       



choose  between  competing inferences  because  the  legislature  has  given  the  Board  

                                                                                                                                                 

authority to determine witness credibility and to  weigh evidence.31                                                          A Board finding  

                                                                                                                                                



"concerning the weight to be accorded a witness's testimony . . . is conclusive even if the  

                                                                                                                                                       



            30          Anchorage  Roofing  Co.,  507  P.2d  at  504.  



            31          See  Brown  v.  Patriot  Maint.,  Inc. ,  99  P.3d  544,  548  (Alaska  2004).  



                                                                           -14-                                                                     7624  


----------------------- Page 15-----------------------

                                                                                                   32  

evidence is conflicting or susceptible to contrary conclusions."                                       "The [B]oard has the          

                                                                                            33     The  Board's  credibility  

sole   power   to   determine   the   credibility   of   a   witness."                                                   

determinations are binding on the Commission,34  as the Commission recognized.  

                                                                                                              



                     Here the Board found Adams credible.  Based on this credibility finding,  

                                                                                                                              



the Board decided Adams did not lose his balance or slip but that the cribbing's failure  

                                                                                                                                



caused  the  ladder  to  fall,  which  in  turn  caused  Adams  to  fall.                                   The  Board  found:  

                                                                                                                                           



"Although [Adams] had alcohol and cocaine in his system at the time he fell from the  

                                                                                                                                     



ladder, intoxication was not the reason for the fall.  Loose cribbing supporting the ladder  

                                                                                                                                 



gave way, which caused [Adams] to fall and would have caused  anyone to fall."  In  

                                                                                                                                      



essence the Board decided that Adams's alcohol and drug use was not a "but for" cause  

                                                                                                                                 



of the accident because the loose cribbing would have given way and caused anyone on  

                                                                                                                                      



the ladder to fall, intoxicated or not.  

                                                          



                     The Fund asserts  that  this finding "strains logic" and is "arbitrary and  

                                                                                                                                    



unreasonable," largely because the finding rests on Adams's testimony. Adams responds  

                                                                                                                            



that "equipment can break causing a worker to be injured regardless of what is in their  

                                                                                                                                   



system"  and  points  out  that  inspection  does  not  always  reveal defects  that  lead  to  

                                                                                                                                      



accidents.   The Board's finding that Adams was credible supports its decision because  

                                                                                                                             



the failure of  the  ladder's support on an uneven surface would cause the ladder to  

                                                                                                                                       



collapse no matter who was on it.  

                                                       



                     The accident was unwitnessed for the most part, so credibility played an  

                                                                                                                                      



important  role in the Board's decision.   Other testimony about the accident does not  

                                                                                                                                     



           32        AS  23.30.122.  



           33        Id.  



           34        AS  23.30.128(b);  Sosa  de  Rosario  v.  Chenega  Lodging,  297  P.3d  139,  146  



(Alaska  2013).  



                                                                  -15-                                                            7624
  


----------------------- Page 16-----------------------

contradict the Board's conclusion.                                            One person                   inside   the house at the time of the                                   



accident testified that he saw "a ladder flying off the roof and Virgil[] bouncing off the                                                                                         



porch."   Another worker indicated that it looked to him as though the cribbing had given                                                                                     



way based on his observation of the cribbing after the fall.                                                               Heath provided contradictory       



testimony during the litigation and gave only vague information about the day of the                                                                                               

                                                                                                                                35    Even if the Board could  

accident, claiming not to know why Adams was at his house.                                                                                                                    



have reached other conclusions based on different inferences,  the Board could  also  

                                                                                                                                                                                 



reasonably reach the conclusion it did based on the evidence before it.  On appeal "[w]e  

                                                                                                                                                                              



should not ' "reweigh the evidence or choose between competing inferences," but [we  

                                                                                                                                                                                 

should]  simply  determine  whether  such  evidence  exists.'  "36                                                                        In  this  case  evidence  

                                                                                                                                                                      



supporting the Board's decision does exist, and that evidence is substantial.  We thus see  

                                                                                                                                                                                   



no error in the Commission's conclusion that substantial evidence supported the Board's  

                                                                                                                                                                         



decision.  



                             3.            The Board's findings aboutAdams's impairment were adequate.  

                                                                                                                                                                    



                             The  Fund  argues  separately  that  the  Board's  findings  about  Adams's  

                                                                                                                                                                     



impairment were inadequate. The Commission concluded that "Adams was undoubtedly  

                                                                                                                                                                



impaired by the use of alcohol and cocaine" and that substantial evidence supported a  

                                                                                                                                                                                       



finding that "the ladder slipped and [Adams] fell due to the loose cribbing giving way."  

                                                                                                                                                                                            



We see nothing erroneous in the Commission's conclusions.  The Board's findings about  

                                                                                                                                                                              



how the accident  happened decreased the need for detailed findings about Adams's  

                                                                                                                                                                       



impairment level because as the Board conceptualized the accident, Adams's impairment  

                                                                                                                                                                  



was not a but-for cause of the cribbing's failure.  As the Commission wrote, "[N]o one  

                                                                                                                                                                                  



              35            Adams v. State,Workers' Comp. Benefits Guar. Fund                                                               , 467 P.3d 1053, 1058               

(Alaska 2020).   



              36  

                                                                                                                                                                                      

                             Cowen v. Wal-Mart, 93 P.3d 420, 424 (Alaska 2004) (second alteration in  

                                                                                                                                                              

original) (quoting Steffey v. Mun. of Anchorage, 1 P.3d 685, 689 (Alaska 2000)).  



                                                                                         -16-                                                                                  7624
  


----------------------- Page 17-----------------------

presented any evidence that the ladder slipped                                                 for   any   other reason than the loose                         



cribbing."  



                                                                                                                                                        

                          The causation chain the Fund posits relies on an assumption that Adams's  



                                                                                                                                                        

intoxication was the reason he failed to inspect the cribbing.  The Commission correctly  



                                                                                                                                                                    

observed that it was unclear whether Adams would have inspected the cribbing had he  

                       37   And the Commission noted Adams's testimony that "he had been on the  

                                                                                                                                                                   

been sober. 



ladder several times since he first placed the cribbing and the ladder had been fine."  

                                                                                                                                                        



                          Finally, the Fund relies on Adams's testimony to argue that he admitted he  

                                                                                                                                                                     



should have checked the cribbing and that this "admission" showed that intoxication led  

                                                                                                                                                                    



to his failure to inspect the ladder.  But the record does not support the broad reading the  

                                                                                                                                                                   



Fund gives the testimony.  When asked whether he "usually check[ed] the cribbing on  

                                                                                                                                                                    



the ladder," Adams answered, "For your safety, yes, you should."  Adams admitted in  

                                                                                                                                                                      



his deposition not checking the cribbing on the day of the accident, adding,  "I should  

                                                                                                                                                            



have, would have, could have - wish I would have, could have a lot of things."  At the  

                                                                                                                                                                   



hearing, he repeated this, saying, "I could have, should have, would have. There's many  

                                                                                                                                                               



different things that we could have done differently."  But he also testified that "visibly,  

                                                                                                                                                         



[the cribbing] looked fine."  This equivocal testimony, which also suggests regret, does  

                                                                                                                                                                



not support the Fund's assertion that Adams's testimony is consistent with its causation  

                                                                                                                                                       



theory.  



                          We conclude that the Board made adequate findings and the Commission  

                                                                                                                                                 



correctly  determined  that  substantial evidence  in  the  record  supported  the  Board's  

                                                                                                                                                         



             37           Workers' compensation benefits are awarded without regard to fault,                                                                       so  



neither the employer's nor the employee's failure to follow safety rules takes an accident                                                               

outside of the Act.                   See Burke v. Raven Elec., Inc.                             , 420 P.3d 1196, 1207 (Alaska 2018)                          

(affirming Board decision not to consider Alaska Occupational Safety and Health report                                                                        

that   documented   employer's   failure   to   follow   safety   regulations   when    deciding  

compensation case).   



                                                                                 -17-                                                                           7624
  


----------------------- Page 18-----------------------

finding that Adams's intoxication did not proximately cause his injury.                                                                                                                                                                                                                  



V.                            CONCLUSION  



                                                            We AFFIRM the Commission's decision.                                                                                                              



                                                                                                                                                                                                       -18-                                                                                                                                                                  7624
  

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