Hi,
I don't drive a car so am not the best resource for the details but I think this church is around the Beersville Fire Hall? (Emerson Road would be the turn off to get there from the 116 Hwy) ... but it's probably best to ask someone at the general store in either Harcourt or Bass River to give you directions as there are a bunch of cross roads in that area and I'm not sure which of them is home to that particular church, however you might want to mention that you don't mean the Zion or the church directly across from it, or the little one in Ford's Mills! It's the "other one" up in that area..... maybe on the way to the Mine Bridge? not sure.... but, if it's the one I'm thinking it is a little church on the right side of the road on the way towards the Mine Bridge that crosses the Coal Branch River. I think it's sort of in between Beersville and Coal Branch but, I don't think Mill Branch is on the map anymore.
Good luck!