operation and maintenance, general

operation and maintenance, general For expenses necessary for the preservation, operation, maintenance, and care of existing river and harbor, flood control, and related works, including such sums as may be necessary for the maintenance of harbor channels provided by a State, municipality or other public agency, outside of harbor lines, and serving essential needs of general commerce and navigation; financing the United States share of the cost of operation and maintenance of the remedial works in the Niagara River; activities of the California Debris Commission; administration of laws pertaining to preservation of navigable waters; surveys and charting of northern and north- western lakes and connecting waters; clearing and straightening channels; and removal of obstructions to navigation; $158,676,000, to remain available until expended.