From the junction with the Canadian Pacific Railway at Yahk, the rail head of the Spokane International Railroad (SI) reached the border in November 1905.

[1] Two months earlier, a Canadian customs office opened across the border at Eastport.

In July 1906, an office opened at Kingsgate, under the administrative oversight of the Port of Nelson.

The SI rail head from the border reached Bonners Ferry in June 1906.

[4] The US Customs Service initially operated from space in the railroad depot.