facts necessary to resolve this appeal. 2 “We review the district court’s application of this standard and the district court’s

grant of summary judgment de novo.” Lehman v. Nelson, 862 F.3d 1203, 1216

(9th Cir. 2017).

1. The Pension Trust requires that an applicant seeking early retirement

benefits refrain “from any employment anywhere for wages or profit as a sheet

metal worker.” The Board of Trustees for the Pension Trust concluded that

Knudson’s current employment for the Bonneville Power Administration (“BPA”)

as a welder constituted employment as a “sheet metal worker.” The Board

reasoned that the nature of Knudson’s work for BPA was similar in nature to the

work performed by other sheet metal workers. Although it is conceivable that one

could work as a welder without being employed as a sheet metal worker—i.e., not

all welders are necessarily sheet metal workers—the Board’s rationale avoided

“sweep[ing] within its ambit an overly broad range of skills.” Tapley, 728 F.3d at

1141 (citation and quotation marks omitted). We conclude that the Board’s

interpretation was reasonable. See O’Rourke v. N. Cal. Elec. Workers Pension

Plan, 934 F.3d 993, 1000–01 (9th Cir. 2019) (“We will accept the Board’s

interpretation unless it is not grounded on any reasonable basis.” (citations and

quotation marks omitted)).

3 2. The Master Trust requires that an applicant seeking early retirement

benefits refrain “from any employment anywhere for wages or profit in the sheet

metal industry.” The Board of Trustees for the Master Trust concluded that

Knudson was currently working in the sheet metal industry, reasoning that the type

of work Knudson performed for BPA was substantially similar to work that other

Local 16 members were performing. Regardless of the core nature of BPA’s

business, it is plausible that some of its employees may be employed in the sheet

metal industry, while others are not. Thus, it was rational for the Board to compare

the work performed by other workers in the sheet metal industry with the work

performed by Knudson at BPA. See id. Knudson offers an alternative definition

for “sheet metal industry,” but “fails to exclude the Board’s interpretation as a

reasonable possibility,” id. at 1001. We conclude that the Board’s interpretation

was reasonable. See id.

AFFIRMED.

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