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  1. 1
    No digital object

    St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    11679
    Date:
    1957-1958
    Source:
    Government
    Reference:
    1976-051 NPC
    St. Lawrence Seaway Authority (Canada) collection [graphic material]. Aerial photos of locks and other parts of the St. Lawrence Seaway system
  2. 2
    No digital object

    [Welland Canal, maintenance plans] [multiple media]

    Archives / Collections and Fonds
    Accession
    **
    Architectural and technical drawings, Maps and cartographic material, Textual material
    Item ID number:
    187631
    Date:
    1915-1972
    Source:
    Government
    Reference:
    RG52M 756/17586, 756/17586 CA
    [Welland Canal, maintenance plans] [multiple media]. Accession consists primarily of plans of buildings, repairs to roadways, locks, lock gates, 
  3. 3
    No digital object

    St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    8659
    Date:
    ca. 1966
    Source:
    Government
    Reference:
    1968-007 NPC
    St. Lawrence Seaway Authority (Canada) collection [graphic material]. St. Lawrence Seaway St. Lawrence Seaway Authority (Canada) Locks (Hydraulic 
  4. 4
    No digital object

    Canada. St. Lawrence Seaway Authority collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    23884
    Date:
    1924
    Source:
    Government
    Reference:
    1996-377 DAP, 123-000686-9
    Canada. St. Lawrence Seaway Authority collection [graphic material]. Unveiling of a cairn commemorating the centenary of the Welland Canal, Allanburg, Ont., 
  5. 5
    No digital object

    St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    9366
    Date:
    1924-1925
    Source:
    Government
    Reference:
    RG43, R610, 1970-198 NPC
    St. Lawrence Seaway Authority (Canada) collection [graphic material]. St. Lawrence Seaway St. Lawrence Seaway Authority (Canada) Ice on rivers, lakes, etc
  6. 6
    No digital object

    St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    11265
    Date:
    1954-1959
    Source:
    Government
    Reference:
    1975-109 NPC
    St. Lawrence Seaway Authority (Canada) collection [graphic material]. Locks (Hydraulic engineering) - Ontario St. Lawrence Seaway Canals - Ontario Locks 
  7. 7
    No digital object

    [St. Lawrence Seaway, plans of canals in the eastern and western regions] [cartographic material, technical drawing, architectural drawing]

    Archives / Collections and Fonds
    Accession
    **
    Maps and cartographic material, Architectural and technical drawings
    Item ID number:
    187870
    Date:
    1841-1957
    Source:
    Government
    Reference:
    RG52M 72/1411, 72/1411 CA
    [St. Lawrence Seaway, plans of canals in the eastern and western regions] [cartographic material, technical drawing, architectural drawing]
  8. 8
    No digital object

    «De-accessioned» St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    8560
    Date:
    ca. 1955-1958
    Source:
    Government
    Reference:
    1967-074 NPC
    <De-accessioned> St. Lawrence Seaway Authority (Canada) collection [graphic material]. Construction scenes of St. Lawrence Seaway; Hon
  9. 9
    No digital object

    St. Lawrence Seaway Authority (Canada) collection [graphic material]

    Archives / Collections and Fonds
    Accession
    Photographs
    Item ID number:
    9118
    Date:
    ca. 1894, ca. 1927-1940
    Source:
    Government
    Reference:
    1969-185 NPC
    St. Lawrence Seaway Authority (Canada) collection [graphic material]. St. Lawrence Seaway Canals - Ontario Welland Canal St
  10. 10
    No digital object

    [St. Lawrence Seaway, plans of the Welland Canal and the St. Lawrence Canal] [technical drawing, cartographic material, architectural drawing]

    Archives / Collections and Fonds
    Accession
    **
    Maps and cartographic material, Architectural and technical drawings
    Item ID number:
    187625
    Date:
    1826-1924
    Source:
    Government
    Reference:
    RG52M 72/5955, 72/5955 CA
    [St. Lawrence Seaway, plans of the Welland Canal and the St. Lawrence Canal] [technical drawing, cartographic material, architectural drawing]
  11. 11
    No digital object

    [Welland Canal, maps and drawings] [multiple media]

    Archives / Collections and Fonds
    Accession
    **
    Architectural and technical drawings, Maps and cartographic material, Textual material
    Item ID number:
    187629
    Date:
    1871-1973
    Source:
    Government
    Reference:
    RG52M 73/27727, 73/27727 CA
    [Welland Canal, maps and drawings] [multiple media]. Accession consists primarily of drawings and maps of the Canal, including bridges, locks and repair 
  12. 12
    No digital object

    [St. Lawrence River, proposed engineering schemes for the old International Section] [cartographic material]

    Archives / Collections and Fonds
    Accession
    **
    Maps and cartographic material
    Item ID number:
    187607
    Date:
    1919-1936
    Source:
    Government
    Reference:
    RG52M 70/23217, 70-23217 CA
    [St. Lawrence River, proposed engineering schemes for the old International Section] [cartographic material]. Items are rolled. Credit the National Archives 
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