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eae MARINE REVIEW. Specification for the 20 and 21-foot Channel. An advertisement elsewhere in this issue calls for proposals for excavating the ship canal of 20 and 21 feet depth between Chicago, Duluth and Buffalo. Work on this great improvement, which is to cost in round numbers $3,400,000, will begin on or before May 15, 1893, and will be entirely finished at the end of the third working season, along with the completion of the Hay lake and St. Mary's Falls canal improvements. The specifica- tions estimate the total excavation in the different channels at 3,450,366 cubic yards, covering 19 2-5 milesin length, with a minimum width of 300 feet, which is increased at the lower end of Lake Huron and above the St. Clair Flats canal to 800 (and even 2,400 feet) to suit special require- ments at these points. Bids for the different sections of the work will be opened at the office of Gen. Poe, Detroit, during eight days from the 9th to the 17th of De cember. 'The general instructions for bidders, which can be se- cured from Gen. Poe, cover six large pages in print. 'The chan- nels to be dredged are divided into eight sections. Bids will be considered separately for each section, and the contract for each will be awarded independently of the others. Bidders may sub- mit bids for one or more sections, but they must be entirely sep- arate. [he following summary of the location, character of work and material to be excavated in the different sections will tend to show the magnitude of this great dredging project: FIRST SECTION--This section comprises the improvenient of two shoals in St. Mary's river, Michigan, above the canal. The upper shoal lies northwesterly, and the lower shoal north- easterly from old Round island light-house. The work to be done consists in excavating a channel within the side and end lines prescribed by the United States agent in charge, said chan- nel to have a bottom width of 300 feet and a total length of about 3,000 feet, the estimated excavation being 90,000 cubic yards, bank measure, more or less. The greatest distance to the dumping ground will not exceed two miles, and the average distance will not exceed one mile. The material to be removed consists of boulders, clay, sand, gravel, and possibly hard pan, all in unknown proportions. SECOND SECTION--This section comprises the improvement of Little Mud lake between the lower end of Sugar island and the lower end of the "Dark Hole," St. Mary's river, Michigan. The work to be done consists in excavating a channel within the side and end lines prescribed: by the United States agent in charge, said channel to have a bottom width of 300 feet, anda length of about 18,500 feet, the estimated excavation being 380,000 cubic yards, bank measure, more or less. The greatest distance to the dumping ground will not exceed two miles, and the average distance will not exceed one mile. The material to be removed consists of sand, gravel, boulders and hard pan, all in unknown proportions. THIRD SECTION--This section comprises the improvement of a reef abreast of Sailors' Encampment island, St. Mary's river, Michigan. 'The work to be done consists in excavating a channel between the side and end lines prescribed by the United States agent in charge, said channel to have a bottom width of 300 feet and a length of about 3,000 feet, the estimated excava- tion being 90,366 cubic yards, bank measure, more or less. 'T'he greatest distance to the dumping grounds will not exceed two miles, and the average distance will not exceed one mile. 'The material to be removed consists mainly of limestone bed rock. FouRTH SECTION--This section comprises the improvement of a shoal about one and one-half miles below Sailor's Encamp- ment, in Mud lake, St. Mary's river, Michigan. 'The work to be done consists in excavating a channel between the side and end lines prescribed by the United States agent in charge; said chan- nel to have a bottom width of 300 feet and a length of about 4,000 feet, the estimated excavation being 67,000 cubic yards, bank measure, more or less. The greatest distance to the dump- ing grounds will not exceed two miles, and the average distance will not exceed one mile. The material to be removed consists of mud, sand, clay and gravel, all in unknown proportions. FIrTtTH SECTION--This section comprises the improvement of a number of small shoals at the foot of Lake Huron. 'The work to be done consists in excavating a channel between the side and end lines prescribed by the United States agent in charge; said channel to have a bottom width of 2,400 feet and a length of about 6,000 feet, the estimated excavation being 256,- 000 cubic yards, scow measure, more or less. The greatest dis- tance to the dumping ground will not exceed two miles, and the average distance will not exceed one mile. 'The material to be removed consists of sand, clay, gravel, boulders and probably hard pan, all in unknown proportions. Sixtu SEcTION--This section comprises the improvement of St. Clair Flats, Michigan. 'The work to be done consists in excavating a channel within the side and end lines prescribed by the United States agent in charge; said channel to begin at the deep water of St. Clair river, above St. Clair Flats canal, with a bottom width of not more than 650 feet, thence gradually nar- rowing to the canal, a length of about 3,000 feet ; thence for the full width of the canal through its entire length, about 7,200 feet: thence gradually widening to a bottom width of not more than 800 feet at the deep water of Lake St. Clair, a further length of about 17,000 feet; the total length being about 27,000 feet, and the estimated excavation being 950,000 cubic yards, scow -- measure, more or less. The greatest distance to the dumping ground will not exceed three miles, and the average distance will not exceed two miles. -The material to be removed consists of clay and sand in unknown proportions. SEVENTH SECTION--This section comprises the improve- ment of Grosse point flats, Lake St. Clair, Michigan. The work to be done consists in excavating a channel within the side and end lines prescribed by the United States agent in charge; said channel to have a minimum width at bottom of 300 feet anda length of about 29,000 feet, but the engineer officer in charge may require the bottom width to be increased to not more than 800 feet, if the price bid so warrants; the estimated excavation for the width of 300 feet being 1,200,000 cubic yards, scow meas- ure, more or less, and for the width of 800 feet 2,900,000 yards, scow measure. 'The greatest distance to the dumping ground will not exceed three miles, and the average distance will not exceed two miles. 'The material to be removed consists of clay, gravel, sand and some boulders, with possibly some hard-pan. EIGHTH SECTION--This section comprises the improvement of the bar at the mouth of Detroit river. 'The work to be done consists in excavating a channel within the side and end lines prescribed by the United States agent in charge; said channel to have a minimum width at bottom of 300 feet and a length of about 26,500 feet, but the engineer officer in charge may require the bottom width to be increased to not more than 8oo feet, if the price bid so warrants; the estimated excavation for the width of 300 feet being 411,000 cubic yards, scow measure, more or less, and for the width of 800 feet 1,086,000 cubic yards, scow measure. The greatest distance to the dumping ground will not exceed three miles, and the average distance will not exceed two miles. The material to be removed consists of sand, clay, gravel and boulders, all in unknown proportions. A late supplement tothe Record of American and Foreign Shipping, published by the American Shipmasters' Association of New York, one of the organizations that has begun to classify lake vessels, notes the dimensions, tonnage, etc., of the lake steamer Wyandotte and car ferry Ann Arbor, No. 1, but does not give a rating to either of them, as they were not constructed under the rules of the association. 5S. ENGINEER OFFICE,HICKOX BUILD- e ing, 185 Euclid Avenue, ' leveland, Ohio, November i, 1892 Sealed proposals for dredg- ing in straight channel through Maumee Bay, for Toledo Harbor, Ohio, will be received at this office until 2 p,m. of Thursday, December 1, 1892, and then publicly opened. Specifications, blank forms, and all available information will be furnished on application to this office. JARED A. SMITH, Corps of Engineers, U.S. A Vinee Ne ee A Good Second-Hand MARINE BOILER, Good for at least 100 Pounds Steam, for use ina Steambarge. Address, MARINE REVIEW, 516 Perry-Payne Bldg., Cleveland, 0. EOR SALE. PU Mi P One 12-inch steam rotary pump, made by the Silsby a Manufacturing Company, Seneca Falls, N.Y. Capacity, ee 2,500 gallons of water per minute. Pump mounted on an iron truck, the front wheels of which run under, so it can be turned in its own length. Engine and pump work both ways, so that suction can be used as discharge or discharge as suction. Complete with all fittings, except boiler and connections. PRICE LOW. Apply to J. A. BEIDLER, 252 Superior St., Cleveland,0. State Size, Age. Condition and Price.