Hi cptbild. I live in Brownwood in central Texas, some say west central Texas, and know that some large caches of "surplus" weapons, plumbing (brass and copper), and other excess war supplies were buried in our old Camp Bowie which was a large military base during WWII. Now, portions of the Camp Bowie area of Brownwood is an industrial park but much of the land is private property. About 25 years ago, a friend who was a retired heavy-equipment operator told me of large amounts of new army surplus that was buried in the old camp. He dug many of the trenches that the materials were dumped into and then he covered them up. He is dead now but he once showed me where one of the big trenches was located. We took a two-box detector out there and it didn't take long to locate the trench that my friend had told me was full of brass and copper plumbing surplus that he buried during the war. This particular trench was on property belonging to a local business and, since I had had some problems in the past with the owner of the property I have left it alone for these many years. I had forgotten about it until I read your message and just thought I would mention it here.
-Texas Jay