A substantial portion of our revenue is derived from federal government contracts, particularly dredging contracts. Revenues related to dredging contracts with federal agencies or companies operating under contracts with federal agencies and the percentage as a total of dredging revenue for the years ended December 31, 2023, 2022 and 2021 were as follows:
Year Ended December 31, 2023 2022 2021 Federal government revenue (in US $1,000) $ 438,790 $ 431,705 $ 568,980 Percent of revenue from federal government 74 % 67 % 78 %
Amounts spent by the federal government on dredging are subject to the budgetary and legislative processes. We would expect the federal government to continue to improve and maintain ports as it has for many years, which will necessitate a certain level of federal spending. However, there can be no assurance that the federal government will allocate any particular amount or level of funds to be spent on dredging projects for any specified period. In addition, Congress must approve budgets that govern spending by many of the federal agencies we support. When Congress is unable to agree on budget priorities, and thus is unable to pass the annual budget on a timely basis, Congress typically enacts a continuing resolution. A continuing resolution allows U.S. federal government agencies to operate at spending levels approved in the previous budget cycle. Under a continuing resolution, funding may not be available for new projects or may be delayed on current projects. Any such funding delays would likely result in new projects being delayed or canceled and could have a material adverse effect on our revenue and operating results. Furthermore, a failure to complete the budget process and fund government operations pursuant to a continuing resolution may result in a U.S. federal government shutdown. An extended shutdown may result in us incurring substantial costs without reimbursement under our contracts and the delay or cancellation of key projects, which could have a material adverse effect on our revenue and operating results. The Company did not experience any material adverse effect on its operations in 2023 as a result of the U.S. federal government operating under a continuing resolution until December 2022. Currently, the government is operating under a continuing resolution until the 2024 budget is approved.
In addition, potential contract cancellations, modifications, protests, suspensions or terminations may arise from resolution of these issues and could cause our revenues, profits and cash flows to be lower. Federal government contracts can be canceled at any time without penalty to the government, subject to, in most cases, our contractual right to recover our actual committed costs and profit on work performed up to the date of cancellation. Accordingly, there can be no assurance that the federal government will not cancel any federal government contracts that have been or are awarded to us. Even if a contract is not cancelled, the government may elect to not award further work pursuant to a contract. There is no guarantee that the current presidential administration or Congress will not divert funds away from the Corps or from our other customers relying on funding from the federal government. There is also no guarantee that additional national emergencies will not be declared in the future. A significant reduction in government funding for dredging or remediation contracts could materially adversely affect our business, operations, revenues and profits.
Further, if the Corps is unable to let bids to market, it could adversely affect our business, operations, revenues and profits. In 2022, our business was adversely impacted by the inability of the Corps to let bids to market, and that inability may continue and may adversely impact our results of operations. If the Corps does not bring higher margin capital projects to market, it may adversely impact our results of operations.