I see that there are no falls listed for Warren County in the Waterfalls listing. How about this one? It's located in the Town of Hague, just off of Route 8 (which can be seen on the right-hand-side of the photo). Hague Brook flows into Lake George just about 1/4 mile farther downstream. According to the "Adirondack Waterfall Guide" by Russell Dunn, these falls are about 15 foot high. Per the book, there is an upper falls (which is smaller) just up the road a bit, but I didn't see them.
So, if/when anyone is in the Lake George area, check this one out!