Works shall provide monthly reports to the Committees on Appropriations of the House of Representatives and the Senate detailing the allocation and obligation of these funds. MISSISSIPPI RIVER AND TRIBUTARIES For an additional amount for Mississippi River and Tributaries , $370,000,000, to remain available until expended, for necessary expenses to dredge navigation projects in response to, and repair damages to Corps of Engineers projects caused by, natural disasters: Provided , That such amount is designated by the Congress as an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985: Provided further , That beginning not later than 60 days after the date of enactment of this Act, the Assistant Secretary of the Army for Civil Works shall provide monthly reports to the Committees on Appropriations of the House of Representatives and the Senate detailing the allocation and obligation of these funds. OPERATION AND MAINTENANCE For an additional amount for Operation and Maintenance for necessary expenses to dredge navigation projects in response to, and repair damages to Corps of Engineers projects caused by, natural disasters, $608,000,000, to remain available until expended, of which such sums as are necessary to cover the Federal share of eligible operation and maintenance costs for coastal harbors and channels, and for inland harbors shall be derived from the Harbor Maintenance Trust Fund: Provided , That such amount is designated by the Congress as an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985: Provided further , That beginning not later than 60 days after the date of enactment of this Act, the Assistant Secretary of the Army for Civil Works shall provide monthly reports to the Committees on Appropriations of the House of Representatives and the Senate detailing the allocation and obligation of these funds. FLOOD CONTROL AND COASTAL EMERGENCIES For an additional