<div dir="ltr"><div dir="ltr"><br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>  From what I gather, this is quite a different thing from *stream* pools, so probably important to draw that distinction.</div><div><br></div><div>[1] <a href="https://en.wikipedia.org/wiki/Upper_Mississippi_River#List_of_pools_and_locks" target="_blank">https://en.wikipedia.org/wiki/Upper_Mississippi_River#List_of_pools_and_locks</a></div><div>[2] <a href="https://www.ifishillinois.org/profiles/Mississippi.php" target="_blank">https://www.ifishillinois.org/profiles/Mississippi.php</a></div></div><br></blockquote>From the second link, it appears these "pools" are actually reservoirs.</div><div class="gmail_quote">Pools in an angling sense, maybe, but not in a strict hydrological</div><div class="gmail_quote">sense.  Probably better to treat them as reservoirs.</div></div></blockquote><div> </div><div>Definitely not - we're talking hundreds of consecutive miles of the Mississippi River.  In this case, the locks aren't making reservoirs, they're replacing rapids to make the river navigable.  Certainly still a river.  I'm just pointing out a feature of rivers that are called "pools" in some context, but don't seem to be "stream pools". </div></div></div>