Secretary of the Army for Civil Works shall provide a monthly report to the Committees on Appropriations of the House of Representatives and the Senate detailing the allocation and obligation of these funds, beginning not later than 60 days after enactment of this Act. Construction For an additional amount for Construction for necessary expenses related to the consequences of Hurricane Harvey, $15,000,000,000, to remain available until expended to rehabilitate, repair and construct United States Army Corps of Engineers projects: Provided, That $10,000,000,000 of the funds provided under this heading shall be used to reduce future flood risk in ways that will support the long-term sustainability of the coastal ecosystem and communities and reduce the economic costs and risks associated with large-scale flood and storm events in areas along the Gulf Coast within the boundaries of the Southwestern and Mississippi Valley Divisions of the Corps that were affected by Hurricane Harvey: Provided further, That $2,700,000,000 of such funds shall be made available not earlier than 14 days after the Secretary of the Army submits the report required under the heading Investigations to be submitted not later than March 1, 2018, and $6,000,000,000 shall be made available not earlier than 14 days after the Secretary submits the report required under the heading Investigations to be submitted not later than May 1, 2018: Provided further, That efforts using these funds shall incorporate current science and engineering standards in constructing previously authorized Corps projects designed to reduce flood and storm damage risks and modifying existing Corps projects that do not meet these standards, with such modifications as the Secretary determines are necessary to incorporate these standards or to meet the goal of providing sustainable reduction to flooding and storm damage risks: Provided further, That upon approval of the Committees on Appropriations of the House of Representatives and the Senate these funds may be used to