Rebuilding Haiti must start from the ground up, with agricultural education
It is possible to generate electricity or mechanical power from falling water. The energy could be used on site to run grinding or milling machinery, for making ice, or for charging batteries for running lights elsewhere, among other uses. Electrical transmission with wires is, of course, possible. In rural areas, the distances involved can make wire transmission too expensive.
To get a rough idea of the power potential multiply the vertical drop (head) in feet by the flow in gallons per minute and divide by ten to get watts. Lots of head is more desirable than lots of flow. Flow determines the size and cost of the turbine required.
Here is a little larger supply that will power 60 homes