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BRANDENBURG TELEPHONE COMPANY,
Plaintiff-Appellant,
v.
SPRINT COMMUNICATIONS COMPANY L.P.,
Defendant-Appellee.
   No. 23-5369
Appeal from the United States District Court for the Western District of Kentucky at Louisville.
No. 3:09-cv-00109—Claria Horn Boom, District Judge.
Decided and Filed: January 10, 2024
Before: SUTTON, Chief Judge; STRANCH and MATHIS, Circuit Judges.


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OPINION
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SUTTON, Chief Judge. After more than a decade of regulatory and judicial proceedings, Sprint Communications concedes that it failed to pay Brandenburg Telephone Company in full for connecting local telephone calls and now owes $2.2 million plus compound interest. This appeal concerns one residual question: the interest rate on the award. Sprint says that Brandenburg’s filed utility tariff sets the interest rate at 8%, and that Sprint is on the hook for $4.3 million in interest. Brandenburg replies that the tariff imposes a rate of 10.66%, bringing Sprint’s bill to $7.1 million in interest. The district court ruled for Sprint. We affirm.