If 55 deg. is the water temp, I'd have to ask, is that about the lowest it gets? If so, then the bass in your area are probably in their winter period for sure. The biggest problem most fisherman have in winter is bass location. A friend of mine has an Atlantis underwater viewing system (camera) and last winter we checked a lot of spots we fish. The fish were deep; 40' - 55' down. They were stacked like cordwood down there on the edges of channels or shelves (structure). However, you could NOT see them on the sonar, period! This is what most fisherman don't get. You have to "know" they are there; not relying on finding them on your electronics. Winter is probably the best opportunity for an UW camera that was ever called for. It's worth it's weight in gold. Of course, our water temps in winter HERE are hovering just above freezing - a lot colder than 55 degrees! So I don't if your bass will react the same. In any case, put a blade bait down there and just barely twitch it off the bottom.