The US Army Corps of Engineers has posted Public Notice “SPK-2009-01197”, which describes the engineering side of the Two Gates project, including detailed construction plans. The notice says that the
… U.S. Army Corps of Engineers, Sacramento District, (Corps) is evaluating a permit application to construct the 2-Gates Fish Protection Demonstration Project, which would result in impacts to approximately 1.97 acres of waters of the United States, including wetlands, in or adjacent to Old River and Connection Slough.
The announcement email reads:
The U.S. Army Corps of Engineers Sacramento District has posted Public Notice SPK-2009-01197 to http://www.spk.usace.army.mil/regulatory.html
San Luis and Delta Mendota Water Authority, Ara Azhderian has applied for a permit to place dredged or fill material and work in approximately 1.97 acres of waters of the United States to construct 2 temporary operable gate structures. This 5 year project would test if such structures could reduce entrainment of sensitive fish species at the State (SWP) and Federal (CVP) water export facilities. This project is located on Old River and Connection Slough, Sec 30, T2N, R4E, and Sec 22, T2N, R4E San Joaquin and Contra Costa Counties, California.
Written comments and/or a request for a paper copy of the notice may be submitted to project manager William Guthrie at, email William.H.Guthrie@usace.army.mil, or telephone 916-557-5269.
Comments must be received by November 30, 2009.
The public notice SPK-2009-01197, concerning the Two Gates project can be found under this link, and the engineering plans and drawings can be found here, showing how far this project has been progressing already.
PS: The link in the email notice is not correct, the correct link for current public notices with the US ACE is here.
Save the California Delta Alliance (STCDA) 
Wow. nodeltagates.xom deserves an oscar.