Interestingly, no mention of springs! I suppose that any official is going to think of a spring as a stream though.

(C) all other waters, such as intrastate lakes, rivers, streams (including intermittent streams), mudflats, sandflats, wetlands, sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds;
Keep searching the Federal Register for the Short Title "Clean Water Restoration Act".