Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number , Reference Number 101, Sheet 006.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number , Reference Number 101, Sheet 005.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number 5129, Reference Number 101, Sheet 002.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number 5129, Reference Number 101, Sheet 001.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number 5129, Reference Number 101, Sheet 003.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, undated. Burlington Northern File Number 5129, Reference Number 101, Sheet 004.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, prepared in 1953. Burlington Northern File Number 5129, Reference Number 10110, Sheet 008.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, prepared in 1953. Burlington Northern File Number PQ-287, Reference Number 10110.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, prepared in 1953. Burlington Northern File Number PQ-287, Reference Number 10108.

Spokane, Portland, and Seattle Railway Engineering Drawing: Yard Office at Willbridge, Oregon, prepared in 1953. Burlington Northern File Number PQ-287, Reference Number 10108.