Burlington Northern Engineering Drawing: Prestressed Concrete "T" Girder, Bridge 12 - Drainage Channel (formerly Northern Pacific), Orillia, Washington, Line Segment 051, Milepost 12.3. Sheet 116 - 8143 - 19, 1986. Note: Concrete span
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Taken From: "List of Officers, Agents, Stations, Etc. Number 44" published by the NP Accounting Department.