I am searching for a picture book from my youth about a beaver that became increasingly industrious and started turning into some sort of earth-moving machine – a bulldozer or steam-shovel, I can’t really recall. Had the usual overtones about destroying the environment. Anyway I remember really liking it and am now looking for it for my son. Any help will be greatly appreciated. My Google searching efforts have been in vain since I can’t remember the title or author at all.