Said commission shall submit to the Chief of Engineers, for the information of the Secretary of the Army, on or before the 15th day of November of each year, a report of its labors and transactions, with plans for the construction, completion, and preservation of the public works outlined in this chapter, together with estimates of the cost thereof, stating what amounts can be profitably expended thereon each year. The Secretary of the Army shall thereupon submit same to Congress on or before the meeting thereof.