Northern Pacific Engineering Drawing: Proposed Extension Concrete Arch, Concrete Arch, Near Rathdrum, Idaho, Line Segment 045, Milepost 44.74. Sheet 446 - 55, undated.

Northern Pacific Engineering Drawing: Proposed Multiplate Extension, Concrete Arch, Near Rathdrum, Idaho, Line Segment 045, Milepost 44.74. Sheet 446 - 55, undated.

Northern Pacific Engineering Drawing: Proposed Platform - Semaphore, Bridge 3.2 - Lake Pend Oreille, west of Sandpoint, Idaho, Line Segment 045, Milepost 3.88. Sheet 1070 - 2, undated.

Northern Pacific Engineering Drawing: Proposed Reflecting Signs, Bridge 4 - Highway, south of Grand Junction, Idaho, Line Segment 381, Milepost 3.69. Sheet 1080 - 12, undated.

Northern Pacific Engineering Drawing: Remodel of Powerhouse Bridge, Bridge 3.2 - Lake Pend Oreille, west of Sandpoint, Idaho, Line Segment 045, Milepost 3.88. Sheet 442 - 25, undated.

Northern Pacific Engineering Drawing: Repair Concrete, Bridge 3.2 - Lake Pend Oreille, west of Sandpoint, Idaho, Line Segment 045, Milepost 3.88. Sheet 1268 - 5, 1947.