What constitutes a "Navigable Waterway"?

A "Navigable Waterway" is defined as all waters that are used in interstate or foreign commerce. This includes various types of water bodies, not just those that are large or flowing. The key aspect is their connection to commerce; for a waterway to be classified as navigable, it needs to provide a means for transportation or trade between states or assist in global shipping.

Understanding that navigable waterways can include lakes, rivers, and even some streams adds context to why this definition is broader than simply large rivers connecting states or those requiring federal permits. The focus on commerce captures the importance of these waterways for economic activity, which is crucial for regulation and management under federal and state laws.

Choosing this particular definition recognizes the influence of the waterway on commerce, highlighting its utility rather than just physical characteristics. This understanding aligns with regulations under the Clean Water Act and other federal statutes, which emphasize the significance of water bodies in facilitating economic activities.