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MARINE REVIEW. ee = Be grange ee es ra -_- 2 ee ee ee PLAN OF NEW 800 FOOT LOCK, SHOWING EXCAVATION AND COFFERDAMS. Wig +. SECTION oN ASB. Fig 1. SIDE ELEVATION. _ Ag? , — “O¥0"0#0? 00700108 : SBReae ts sec yyge in ane a= es gee U4 ORK 10: a Ou O :o, ek ide iC : O: 2 ‘Ole 3 pene * OF = tQ0 i? 0) b ©: . ; (OO Cfank [Fram ms eas * iS se 4} *s . AO) 20 eG (28 2 - $680 @. = ere cocie cee 4 gi [ulo oe OS mi fete ec. 2 O35 fy tiple = ' a S1Ol =e! 4 10 9g ‘ O!9 Oy s e@ oO 3 3 14 ob. Sere Par a sereeresrs antes eae . 1O'O# ONO #O*O*OO*O°OH O # 1 ' | { 1 1 i | | ' i] te, - - - PRE Sy ap O 4 ‘ 4 stream) Oye repe O:0"0r0" GO: O80 £80088 ection on’A’. OF fa O if Ojo ~~ YU es 7) Approximate Estimate of Weights St - 3194 lbs : Fig.6. Section of Trunnion on D. Fig. 3. | SECTION on'C: Seale - 1:6, or Two Inches = One Foot. . Scale of Fyet and Inches,” . : } 5 EEN yee pe ee ONE OF TWO NEW EMPTYING VALVES PLACED IN THE PRESENT LOCK. present one it will be emptied in about the same time, there be- T18 NEW FOO-FOOT LOCK. ing six 8 feet square emptying tunnels and a like number of fill- The illustration of the plan and location for the new Sault ing tunnels. By the following it will be seen that there will be canal lock is the first that has been published and the following no necessity for miter sill protection: The breast wall at the particulars were furnished by Lt. Riche. From quoin post to head of the lock will be six inches higher than the lower miter sill quoin post the new lock will be 800 feet, while the whole length and the floor will be six inches higher than the lower miter sills; of the walls will be 1,100 feet, the walls being 100 feet apart. The and the miter sills in the new lock will be 6 feet lower than gates will be of steel instead of wood and each leaf of the lower those in the present lock, giving that much more draft to vessels. and intermedidte gates will weigh 150 net tons, while each There will be used in the masonry work 22,000 barrels Portland leaf of the upper and lower guard gates and the upper gate will and 75,000 barrels natural cement, 20,000 cubic yards cut stone, weigh 100 tons, 1,200 tons of steel being used for all the 59,000 cubic feet of backing and 5,000 cubic yards of concrete. leaves. While the new lock will be very much larger than the The masonry work is contracted to be finished Nov. 15, 1893.