Wow, pointless Tekkit hate much? It's depressing to see such random unsubstantiated comments parroted a community rather then trying to be constructive.
I'm guessing confusion is something to do with the section on the IC2 wiki (not the tekkit wiki, I suspect that was a slip of the tounge) with no longer working unmaned water tower designs. As theres nothing that says anything like this on the tekkit wiki I can find. Manned mode is still in, there was just a mechanic update that borks those designs.
If you did mean tekkit, tekkit still has unmaned water mills. It includes IC2 as is. Tekkit is at the end of the day just a redistrabution of the mods with conflicts fixed. The content from the individual mods is as is. As such the best sources are ususaly the individual mod wikis.