Okay, next step in the process...
The Army Corps of Engineers came up blank, so here is what I suggest next. Get in contact with NARA in Maryland and obtain the unit's records by either one, hiring a research assistant or college student, or arranging to go there yourself one day to copy the records.
Several years ago I hired a research assistant, for I could not get there myself. She copied several hundred documents for me. Talk about a wealth of information.
Mind you, not every unit will have that many documents in the archives, but you never know what it available until you try. It is worth the effort.
Visit this link for more info. Please let me know if you need any other information. Will be happy to give guidance.
http://www.archives.gov/dc-metro/college-park/researcher-info.html
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"