River Federalism.

In studying rivers, physical and social science researchers tend to analyze water resource regulation at a national scale, treating “the state” as a monolithic entity mechanistically executing its regulatory code. Yet variation abounds in the interpretation and application of any national environmental policy. This study examines the complex geography of a small but crucial component of the U.S. Clean Water Act—compensatory stream mitigation—and how particular states and federal agency districts, and the individuals occupying key roles in those units of government, have interpreted the same national law in quite different social and environmental settings. The appearance of monotonic regulatory outcomes at a relatively coarse scale obscures a high degree of fine-scale heterogeneity. [ABSTRACT FROM PUBLISHER]