Northern Pacific Engineering Drawing: Detail of Ballast Deck, Bridge 93.1 - Underpass, south of Castle Rock, Washington, Line Segment 052, Milepost 93.2. Sheet 1054 - 29, 1957. Note: Pile trestle

Northern Pacific Engineering Drawing: Detail of Piers, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, 1914. Note: Steel spans

Northern Pacific Engineering Drawing: General Plan and Falsework, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 1268 - 13, 1949. Note: Steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 87+4250 - Buland Drive, Castle Rock, Washington, Line Segment 052, Milepost 87.80. Sheet 429 - 6, undated.

Northern Pacific Engineering Drawing: General Plan, Bridge 87+4250 - Buland Drive, Castle Rock, Washington, Line Segment 052, Milepost 87.80. Sheet 429 - 6, undated. Note: Timber bridge

Northern Pacific Engineering Drawing: Pier 2, Bridge 87+4250 - Buland Drive, Castle Rock, Washington, Line Segment 052, Milepost 87.80. Sheet 429 - 6, undated.

Northern Pacific Engineering Drawing: Pier 3, Bridge 87+4250 - Buland Drive, Castle Rock, Washington, Line Segment 052, Milepost 87.80. Sheet 429 - 6, undated.

Northern Pacific Engineering Drawing: Piers 2 and 3, Bridge 91 - Underpass, south of Castle Rock, Washington, Line Segment 052, Milepost 91.8. Sheet 371 - 6756 - 3, undated.