Northern Pacific Engineering Drawing: Crossing Watchman's House at Kelso, Washington, prepared in 1961. Burlington Northern File Number 4933-1, Reference Number 10103, Sheet 001.

Northern Pacific Engineering Drawing: Shop Plan - Precast Concrete, Culvert (Old Number 99), Near Kelso, Washington, Line Segment 052, Milepost 99.1. Sheet 388 - 8763, undated.

Northern Pacific Engineering Drawing: Shop Plan - Precast Concrete, Culvert (Old Number 99), Near Kelso, Washington, Line Segment 052, Milepost 99.1. Sheet 388 - 8763, undated.

Northern Pacific Engineering Drawing: Fill - 10 Foot X 12 Foot Pier, Culvert (Old Number 99), Near Kelso, Washington, Line Segment 052, Milepost 99.1. Sheet 388 - 8763 - 1, undated.