This is going to be a tough week; draft tube repairs, etc. so in doing a bit of surfing, I ran into the web site at the URL below. This might be of interest to Rob (SRE) for linking to his site. There's a Russian book translated into English on Draft Tubes; another on tailraces exiting into the river - to name a few.
for a direct link to a book (and hence to the site) try:
for a direct link to a book (and hence to the site) try: