I can fill in a wetland and I don’t need to tell anyone I’m doing it,’” Mueller said. “There are thousands of these, so the fear is now people could decide: ‘I don’t need a point source permit or a dredge-and-fill permit. The new rule would particularly affect unique features of the Chesapeake Bay’s watershed known as Delmarva bays and pocosins, which are a mix between a wetland and a sandy swamp. The bay foundation contends that the intermittent streams and nearby wetlands play an important ecological role, even if they don’t have a permanent surface water connection to larger waterways. The new rule was announced at a trade show for homebuilders in Las Vegas.