FORTY MOST ASKED QUESTIONS & ANSWERS
Uncertainties About Indirect Effect of a Proposal
18. How should uncertainties about indirect effects of a proposal be addressed, for example, in cases of disposal of
federal lands, when the identity or plans of future landowners is unknown?
The EIS must identify all the indirect effects that are known and make a good faith effort to explain the effects that are not known but
are "reasonably foreseeable." Section 1508.8(b). In the example, if there is total uncertainty about the identity of future land owners or the
nature of future land uses, then of course, the agency is not required to engage in speculation or contemplation about their future plans.
But, in the ordinary course of business, people do make judgments based upon reasonably foreseeable occurrences. It will often be
possible to consider the likely purchasers and the development trends in that area or similar areas in recent years; or the likelihood that
the land will be used for an energy project, shopping center, subdivision, farm or factory. The agency has the responsibility to make an
informed judgment, and to estimate future impacts on that basis, especially if trends are ascertainable or potential purchasers have
made themselves known. The agency cannot ignore these uncertain but probable effects of its decisions.