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- Description:
- One navigational chart entitled "St. Lawrence River, Detail Sheet No. 7." The title block near the lower right corner of the sheet indicates "Major C. B. Comstock, Corps of Engineers, U.S.A., in charge" and that the chart area was "Surveyed by F. M. Towar, A. T. Morrow, and C. Stephens." The chart was drawn at a scale of 1:10,000 and is printed in black ink on white paper. Survey information includes water depths in feet, depth contour lines, shoal and current notes, river bottom characteristics, shoreline details, towns, roads, property lines, north arrow, and survey triangulation points. The chart is dated 1871. A black ink stamp on the verso shows "U. S. Engineer Office, Detroit, Mich., Jun. 20, 1901."
- Date Issued:
- 1901-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One blueprint drawing entitled "Steam Survey Boat, Gen. C. B. Sears." The drawing shows a starboard side exterior profile view of the proposed boat as well as three plan views of the decks and one cross-section view of the hull and decks. Design notes and specifications are shown along the right side of the drawing. The title block in the lower right corner shows that the drawing was "Prepared in the Office of the Chief of Engineers, U. S. Army, Washington, D.C." The drawing was done at scales 1/8 inch and 1/2 inch = 1 foot and is dated 1914.
- Date Issued:
- 1914-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One navigational chart entitled, "General Chart of the Northern and Northwestern Lakes, Including New York State Canals and Lake Champlain," that was compiled and published by the U.S. Lake Survey, War Department, Corps of Engineers. The chart (No. 0) is a polyconic projection and is drawn at a scale of 1:1,200,000. It shows all of the Great Lakes region from Duluth, Minnesota, to Lake Champlain and the Hudson River in New York. General topographic details and notes are printed in black. Land areas are shaded pale yellow. Lake areas are shaded white or light blue depending upon water depth and also include contour lines for water depths in fathoms. Lines of latitude and longitude are shown in black. Lines of magnetic variation are shown in red. Principal lighthouses are shown in red and yellow. Information tables are shown on the right and left sides of the chart for U. S. and Canadian canals, dry dock locations, and annual lake level fluctuations. Printed text near the center lower edge shows "Aids to Navigation Corrected from Information Received to June 20, 1916."
- Date Issued:
- 1916-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One navigational chart entitled "St. Lawrence River, Detail Sheet No. 6, From Galop Rapids to Point Iroquois." The title block near the top of the sheet indicates "Major C. B. Comstock, Corps of Engineers, U.S.A., in charge" and that the chart area was "Surveyed under the direction of Lieut. W. R. Livermore, Corps of Engineers, U.S.A." The chart was drawn at a scale of 1:10,000 and is printed in black ink on white paper. Survey information includes water depths in feet, depth contour lines, shoal and current notes, river bottom characteristics, shoreline details, towns, roads, property lines, north arrow, and survey triangulation points. The chart is dated 1871.
- Date Issued:
- 1901-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One drawing entitled "Design of Motor Launch No. 8 for the U. S. Lake Survey." The plan is drawn in black ink on linen at a scale of 1 inch = 1 foot and is dated December, 1912. This sheet shows plan, profile, and cross section for a proposed 21.5 foot long, wooden-hulled motor launch. The title block in the lower right corner shows the plan was "Prepared under the direction of Lieut. Col. J. C. Sanford, Corps of Engineers, U.S.A."
- Date Issued:
- 1912-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One drawing entitled "Survey of N. and N.W. Lakes" and "Standards of Length." Notes in the upper left corner show "Lt. Col. G. J. Lydecker, Corps of Engineers, U.S.A., in charge" and that the drawing (Plate I) was "To accompany report of Asst. Eng. E. E. Haskell." The plan is drawn in black ink on linen and is dated July 1, 1898. The drawing shows plan, elevation, and cross-section views of an apparatus that was used to compare measuring instruments against a standard 8 meter bar. The name, "A. Mangelsdorf," is shown in the lower right corner of the sheet.
- Date Issued:
- 1898-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
- Description:
- One blueprint drawing entitled "Steel Hull Screw Tug, Engineer, N.Y., for New York Harbor, N.Y., Midship Section." The drawing (Sheet 3-1) shows a cross-section view of the hull and deck of the proposed propeller-drive tugboat. The title block in the lower right corner shows that the drawing was "designed in the Office of the Chief of Engineers, U.S.A., Washington, D.C." The drawing was done at a scale 1 inch = 1 foot and is dated August, 1910.
- Date Issued:
- 1910-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Maritime
