The district engineer shall require sufficient financial assurances to ensure a high level of confidence that the compensatory mitigation project will be successfully completed, in accordance with applicable performance standards. [33 CFR 332.3(n)(1)]
The amount of the required financial assurances must be determined by the district engineer, in consultation with the project sponsor, and must be based on the size and complexity of the compensatory mitigation project, the degree of completion at the time of project approval, the likelihood of success, the past performance of the project sponsor, and any other factors the district engineer deems appropriate … [33 CFR 332.3(n)(2)]
[M]ay be in the form of performance bonds, escrow accounts, casualty insurance, letters of credit, legislative appropriations for government project, or other appropriate instruments subject to the approval of the district engineer.
[T]ransfer the long-term management responsibilities of the compensatory mitigation project site to a land stewardship entity, such as a public agency, non-governmental organization, or private land manager, after review and approval by the district engineer.
Appropriate long-term financing mechanisms include non-wasting endowments, trusts, contractual arrangements with future responsible parties, and other appropriate financial instruments. In cases where the long term management entity is a public authority or government agency, that entity must provide a plan for the long term financing of the site.