Northern Pacific Engineering Drawing: Abutment and Retaining Wall, Bridge 21 (1.4) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 21.76. Sheet 1261 - 3A, undated.

Northern Pacific Engineering Drawing: Abutment and Retaining Wall, Bridge 25 (1.5) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 25.34. Sheet 1261 - 3B, undated.

Northern Pacific Engineering Drawing: Retaining Walls, Bridge 21 (1.4) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 21.76. Sheet 1261 - 3A, undated.

Northern Pacific Engineering Drawing: Retaining Walls, Bridge 25 (1.5) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 25.34. Sheet 1261 - 3B, undated.

Northern Pacific Engineering Drawing: Structural Details, Bridge 21 (1.4) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 21.76. Sheet 1261 - 3A, undated.

Northern Pacific Engineering Drawing: Structural Details, Bridge 21 (1.4) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 21.76. Sheet 1261 - 3A, undated.

Northern Pacific Engineering Drawing: Structural Details, Bridge 25 (1.5) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 25.34. Sheet 1261 - 3B, undated.

Northern Pacific Engineering Drawing: Structural Details, Bridge 25 (1.5) - Highway, north of Allyn, Washington, Line Segment 426, Milepost 25.34, undated.