The Reorganization Act allowed to president to hire confidential staff as he saw it fit, while also he was given the power to reorganize the executive branch of the government.
The purpose of the 1903 construction project is to protect from flooding by hurricanes
I believe it would be the spy system. During the war, some americans were for and against the war and independence. To keep in the know of what the british were planning, there was an elaborate spy system to spread information on the british troops where people acted as they were for british rule. :)
hope this helps!!