Northern Pacific Engineering Drawing: Shop Plan - Girder/Beam, etc., Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Lateral Brace, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Shoes, etc., Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, undated.

Northern Pacific Engineering Drawing: Summary Quantities/Area Map, Bridge 87+4250 - Buland Drive, Castle Rock, Washington, Line Segment 052, Milepost 87.80. Sheet 429 - 6, undated.

Northern Pacific Engineering Drawing: Tie Framing Plan, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 785 - 18, 1940.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 93.3 - Ostrander Creek, south of Castle Rock, Washington, Line Segment 052, Milepost 93.6. Sheet 1268 - 13, undated.

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

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