In what critics are describing as a government land grab, the Environmental Protection Agency proposed a change Tuesday to the Clean Water Act that would give it regulatory authority over temporary wetlands and waterways. The proposal immediately sparked concerns that the regulatory power could extend into seasonal ponds, streams and ditches, including those on private property. "The ... rule may be one of the most significant private property grabs in U.S. history," said Louisiana Sen. David Vitter, the top Republican on the Senate Environment and Public Works Committee. The EPA proposal would apply pollution regulations to the country's so-called "intermittent...