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Page Number: 4

Cite as:  598 U. S. ____ (2023) 

1 

Opinion of the Court 

NOTICE: This opinion is subject to formal revision before publication in the 
United  States  Reports.  Readers  are  requested  to  notify  the  Reporter  of 
Decisions,  Supreme  Court  of  the  United  States,  Washington,  D.  C.  20543, 
pio@supremecourt.gov, of any typographical or other formal errors. 

SUPREME COURT OF THE UNITED STATES 

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No. 21–1449 
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GLACIER NORTHWEST, INC., DBA CALPORTLAND, 
PETITIONER v. INTERNATIONAL BROTHERHOOD 
OF TEAMSTERS LOCAL UNION NO. 174 

ON WRIT OF CERTIORARI TO THE SUPREME COURT OF 
WASHINGTON 

[June 1, 2023]

 JUSTICE BARRETT delivered the opinion of the Court. 
Glacier  Northwest,  a  concrete  company,  depends  on  its
truck  drivers  to  deliver  concrete  to  customers  in  a  timely 
manner.  But when relations between Glacier and its driv-
ers soured, the drivers went on strike.  Their labor union 
allegedly  designed  the  strike  with  the  intent  to  sabotage 
Glacier’s  property.  Although  Glacier  managed  to  avoid 
damage to its delivery trucks by deploying emergency ma-
neuvers, the concrete that it had already produced that day 
went to waste.  Glacier sued the union in state court for de-
stroying its property.  But the company did not get very far:
The  state  court  dismissed  Glacier’s  tort  claims  on  the 
ground  that  they  were  preempted  by  the  National  Labor 
Relations Act.  We reverse. 

I 
A 
Enacted  in  1935,  the  National  Labor  Relations  Act 
(NLRA) “encourag[es] the practice and procedure of collec-
tive bargaining” between labor and management to resolve
“industrial disputes arising out of differences as to wages,