Only a designated federal, state, or tribal trustee may bring an NRD claim on behalf of the public's interest in injured natural resources such as fisheries, wetlands, groundwater, or wildlife habitat; a private landowner's own property damage claim is a separate cause of action even where it arises from the same release. NRD claims are distinct from response-cost recovery, which reimburses cleanup expenses, because NRD compensates for the resource injury itself, including lost use during the period before restoration is complete.

Damages are assessed using restoration-based methodologies such as habitat equivalency analysis or resource equivalency analysis, which calculate the scale of compensatory restoration needed to offset both the degree and duration of the injury, rather than simply valuing the resource at fair market price. Federal assessment regulations afford trustees a rebuttable presumption of correctness for assessments conducted according to the prescribed methodology, shifting the practical burden onto a defendant challenging the trustee's damages figure.

Because restoration-based damages can diverge significantly from a simple market-value estimate, the choice of assessment methodology and its underlying ecological assumptions often drives the ultimate dollar exposure more than the extent of contamination itself. A Juricratic simulation can model assessment methodology choice and its key ecological assumptions as dials to rehearse how NRD exposure ranges shift under different restoration-cost scenarios.

NRD claims typically follow a significant release affecting a public resource, such as an oil spill or a large industrial contamination event, with the trustee conducting a damage assessment that runs alongside — but separate from — any response-cost recovery action, often resolving through a negotiated restoration plan and consent decree.