Great Northern Engineering Drawing: General Plan, Bridge 14 - Canal, Merrill, Oregon, Line Segment 055, Milepost 13.98. Sheet 275 - 4532 - 7, 1949.

Great Northern Engineering Drawing: General Plan, Bridge 15.9 - Canal, south of Merrill, Oregon, Line Segment 055, Milepost 15.93. Sheet 275 - 4535 - 2, 1931.

Great Northern Engineering Drawing: General Plan, Bridge 15.9 - Canal, south of Merrill, Oregon, Line Segment 055, Milepost 15.93. Sheet 275 - 4535 - 5, 1950.

Great Northern Engineering Drawing: General Plan, Bridge 16.2 - Canal, south of Merrill, Oregon, Line Segment 055, Milepost 16.20. Sheet 275 - 4536 - 2, 1931.

Great Northern Engineering Drawing: General Plan, Bridge 16.2 - Canal, south of Merrill, Oregon, Line Segment 055, Milepost 16.20. Sheet 275 - 4536 - 5, 1950.

Great Northern Engineering Drawing: General Plan, Bridged 15.7 - Cattle Pass, south of Merrill, Oregon, Line Segment 055, Milepost 15.70. Sheet 275 - 4566 - 1A, 1931.