New Dock- Messrs. Irwin and Sloan are rebuilding their dock next south of their elevator. It is 132 feet front 120 feet in rear and 100 ft. deep. It is being lowered three feet, and rebuilt of heavy timbers in the most substantial manner. The work is under the management of our old friend H. M. Whitney, which is a sufficient guarantee that it will be thoroughly performed. The dock has been leased to the Northern Transportation Co., who will use it in connection with their former premises. Over the dock the owners will erect a substantial warehouse 24 feet high. The Northern Transportation Co., are also rebuilding their dock and when completed they will have in connection with the above new dock, a water front of about 200 feet.. The D., L. & W. R.R. Co’s extension will pass the rear of the warehouse enabling the transhipment of goods to be made directly from the cars to the boats. The work for the N.T. Co., is done under charge of John O’Brien, Esq., who has been their faithful Supt., of the warehouse for several years.