; providing security for infrastructure owned or operated by the Corps, including administrative buildings and laboratories; maintaining harbor channels provided by a State, municipality, or other public agency that serve essential navigation needs of general commerce, where authorized by law; surveying and charting northern and northwestern lakes and connecting waters; clearing and straightening channels; and removing obstructions to navigation, $3,519,000,000 (increased by $325,000) (reduced by $500,000) (increased by $500,000), 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; of which such sums as become available from the special account for the Corps of Engineers established by the Land and Water Conservation Fund Act of 1965 shall be derived from that account for resource protection, research, interpretation, and maintenance activities related to resource protection in the areas at which outdoor recreation is available