From the little that's available online, and reading veterans obituaries and tributes, it seems the unit served in the Carentan area in France, Northern France and the Bulge and then into the Rhineland. They may have been transferred to the Pacific after May 45 according to some obituaries for men in the unit.
There are some good links to information on engineering units, their duties and tasks and histories at the bottom of this page-
http://www.6thcorpscombatengineers.com/history.htmYou can also contact the National Archives branch in College Park, Maryland to see what they have for unit records and histories. There can be thousands of pages in the unit history including morning reports, action reports and you would have to know what information you are looking for, as it can get quite expensive having them copy records. They should be able to provide the summary that's a part of the unit history.
http://www.fas.org/sgp/crs/secrecy/RS21282.pdfMorning reports and Unit Rosters-
http://www.archives.gov/st-louis/military-personnel/morning-...U.S. Army History Centers-
Carlisle Barracks can usually proved a good bit of information and direct you where to locate surviving records:
U.S. Army Center of Military History
Collins Hall
102 4th Avenue Bldg. 35
Fort McNair
Washington, DC 20319-5060
E-mail:
CMHAnswers@conus.army.milhttp://www.history.army.mil/(202) 685-4042
U.S. Army Heritage & Education Center (Carlisle Barracks)
950 Soldiers Drive
Carlisle, PA 17013-5021
E-mail:
usarmy.carlisle.awc.mbx.usamhi@mail.mil (research inquiries)
http://usahec.org(717) 245-3949
Have you tried contacting the Corps of Engineers historian to see if they have any information of the unit?
http://www.usace.army.mil/About/History.aspx703-428-6563