Sens. John Barrasso (R-Wy.), James Inhofe (R-Okla.), Dean Heller (R-Nev.) and Jeff Sessions (R-Ala.), along with 26 of their colleagues, introduced legislation to stop the Environmental Protection Agency (EPA) and the U.S. Army Corps of Engineers (USACE) from implementing its guidance on Clean Water Act jurisdiction.

In May 2011, the EPA and Corps issued draft guidance on “Identifying Waters Protected by the Clean Water Act.”