Another propane post:
I could see a white blob in the woods next to my house, and it ruined the view, so I went over to it, about 80 feet away, and it was a grill-size propane tank, partly embedded in the mud. I figured it was empty but when I picked it up, it's at least 1/2 full. Lucky me.
Things get washed down the strem when the stream floods. I can't figure oout why most of this stuff is even near the stream (like bicycles! I've found 2.) but this is even more enigmatic. Who would leave a full tank of propane near the stream? I've walked the 2 miles upstream to where it is only 12 inches wide. There are a lot of people who live near it like I do, but everyone has a yard and then some trees. They did a pretty good job deciding how close to the stream a house could be built, and none of the houses flood. No reason to leave propane so near the stream and so far from one's home.