Report of Messrs. Maillefert and Raaslof, Civil Engineers, upon the Examination and Survey of the River St. Lawrence, from Prescott to the head of the Lachine Canal, and certain experimental blasting operations made during the summer of 1854.
Table of Contents

Title Page
Table of Contents
Maps Accompanying this Report
Copy of a Report of a Committee of the Honorable the Executive Council, dated 18th October, 1854, approved by His Excellency the Governor General, in Council, on the same day.
Instructions for J. B. Jarvis, Esquire, Civil Engineer, on the subject of a Canal between the River St. Lawrence and Lake Champlain.
STATEMENT shewing the Cost of a Survey for a Canal to connect the River St. Lawrence with Lake Champlain.
Report of Edward H. Tracy, Esquire, Civil Engineer.
Report of John B. Jarvis, Esquire, Civil Engineer.
Report of Messrs. Maillefert and Raaslof, Civil Engineers, upon the Examination and Survey of the River St. Lawrence, from Prescott to the head of the Lachine Canal, and certain experimental blasting operations made during the summer of 1854.
[Introduction]
1. Surveying Operations.
2. The Width and Depth of the Channel.
3. The Low Summer Water
4. The Experimental Blasting Operations.
5. The Estimates of Cost.
RECAPITULATION
[Maillefert & Raasloff to Begly, 9 Sep. 1853]
[Maillefert & Raasloff to Commissioners of Public Works, 26 Oct. 1853]
[Maillefert & Raasloff to Begly, 20 May 1854]
[Maillefert & Raasloff to Begly, 5 May 1854]
[Maillefert & Raasloff to Killaly, 5 Jun 1854]
[Maillefert & Raasloff to Begly, 6 Jun 1854]
[Maillefert & Raasloff to Begly, 14 Jun 1854]
[Raasloff to Killaly, 14 Jun 1854]
[Maillefert & Raasloff to Commissioners of Public Works, 4 Jun 1854]
[Maillefert & Raasloff to Commissioners of Public Works, 27 Jun 1854]
[Maillefert & Raasloff to Begly, 29 Jun 1854]
[Maillefert & Raasloff to Begly, 4 Aug 1854]
[Maillefert & Raasloff to Begly, 25 Aug 1854]
[List of Instruments from Public Works, 29 Aug 1854]
[Maillefert & Raasloff to Begly, 29 Aug 1854]
[Maillefert & Raasloff to Begly, 25 Aug 1854]
[Wulff, Elliott, Bell, Blenham to Begly, 25 Aug 1854]
[Maillefert & Raasloff to Begly, 2 Sep 1854]
[Maillefert & Raasloff to Begly, 66 Sep 1854]
[Maillefert & Raasloff to Begly, 6 Nov 1854]
[Maillefert & Raasloff to Begly, 30 Nov 1854]
[Begly to Maillefert & Raasloff, 30 Jun 1853]
[Begly to Maillefert & Raasloff, 5 Sep 1853]
[Begly to Maillefert & Raasloff, 29 Sep 1853]
[Killaly to Raasloff, 20 Jun 1854]
[Begly to Maillefert & Raasloff, 15 Sep 1854]
[Begly to Maillefert & Raasloff, 20 Nov 1854]
[Begly to Maillefert & Raasloff, 5 Dec 1854]
Tender for Improving the Rapids of the St. Lawrence.
No. 1. Estimate of the Cost of Surveying "Coteau," "Cascades," and "Lachine Rapids," &c.
[Articles of Agreement, Maillefert & Raasloff and Crown, 18 Oct 1853]
[Articles of Agreement, Maillefert & Raasloff and Crown, 9 Dec 1854]
SCHEDULE A. List of Boats and other material purchased by the undersigned Maillefert & Raaslof, for use in their Exploration of the Rapids of the River St. Lawrence.
[Articles of Agreement, Maillefert & Raasloff and Crown, 9 Sep 1854]
SCHEDULE A. List of Boats and other materials purchased by the undersigned, for use in their Exploration of the Rapids of the River St. Lawrence.
Table A.

RECAPITULATION

Of the estimates of cost of procuring a navigable Channel throughout the whole of the Rapids of the River St. Lawrence from Prescott to the head of the Lachine Canal, by removing the obstructions, that Channel to be 200 feet wide and between 12 and 13 feet deep at low summer water.

1. Galoppe Rapids 11,232
2. North Channel of the Long Sault 17,198
3. Coteau Rapids, (from Lake St. Francis to Pointe au Diable) 40,365
4. Cedar Rapids, (from Pointe au Diable to Pointe au Moulin) 12,500
5. Cascades Rapids, (from Pointe au Moulin to Lake St. Louis) 98,705
Total 180,000

It results from the examination made by the undersigned, and upon which they have the honor of reporting above:

1st. That the River St. Lawrence in its present condition may be considered navigable during low summer water from Prescott to the foot of Lake St. Francis for vessels drawing 8 feet, also through Lake St. Louis for vessels drawing 8 feet or even 10 feet, and between Lakes St. Francis and St. Louis for vessels drawing 6 feet, and during the higher stages of water by vessels respectively of a somewhat heavier draft, however not exceeding respectively 8 1/2 and 6 1/2 feet.
2nd. That to make it perfectly navigable throughout, from Prescott to the head of the Lachine Canal, for vessels drawing 10 feet, will require the removal of obstructions in the Galoppe Rapids, the North Channel of the Long Sault, the Coteau, Cedars, and Cascades Rapids.
3rd. That the practicability of removing those obstructions by means of sub-marine blasting, &c., has been ascertained by actual experiment in different portions of the Coteau Rapids; and
4th. That the cost of the whole improvement will not exceed 180,000.

In submitting the above Report and accompanying Maps, which are the result of nearly six months of uninterrupted labor on the River, the undersigned beg leave respectfully to remark that, in the pursuance of their work in the field, as well as in framing their Report, they have been governed throughout by the desire of collecting and conveying as much information as possible, but at the same time of keeping strictly within the limits assigned by their instructions. That for this reason they have refrained from discussing in the present Report the importance of the improvement contemplated, and the different plans for making the St. Lawrence navigable, which have been proposed by others; that, however, at the same time they have at no moment lost sight of the magnitude of the object in view, and the importance of the investigation with which they have been entrusted, that they have spared no effort to make their Report correct and reliable, and shun no danger where, to obtain information, it was deemed necessary to encounter it. They beg leave also gratefully to acknowledge the ability and cheerfulness with which they have been sustained throughout by their different assistants, whom even serious accidents could not dishearten, and in concluding, would express the hope that, in judging of their labors, the Honorable the Commissioners of Public Works will be pleased to take into consideration the peculiar difficulties with which operations of this kind are necessarily attended.

The whole respectfully submitted.
(Signed,) B. MAILLEFERT,
W. RAASLOFF,
Engineers.
Coteau Landing, 15th November, 1854.

 


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This volume was digitized from the collections of the Marine Museum of the Great Lakes at Kingston