The breach at Dam No. 4 is about to be closed, now that the stage of water will permit operations. Over 100 hands, (chiefly boatsmen, whose all is dependent upon the Canal,) are employed night and day. On Tuesday morning the first crib was put in. Two others are to be put in, which will be done early next week, and thus close up the breach in the course of ten days, should the weather continue favorable. Both Dams will be completed this summer by building them of the most solid and endurable Masonry ; the prospect of procuring the necessary funds from the Coal Companies, amount almost to a certainty. The company owes nothing however for the work already done by contractors at these dams. Loaded Boats can now pass the tunnel. An Irishman named Daniel Hughes on Monday slipped from the crib at Dam No. 4, into the water, his body was drawn into the rapid current that ran through the breach, and after fruitless efforts to save him and his own agonizing exertions, he sank to rise no more alive.