Sewer is absolutely NOT needed north of the bridge any further than Reef Village. That's a colossal waste of taxpayer dollars if they allow that to happen. Not to mention....10 lift pumps between the bridge and Blue Reef. Do you fancy one of those near your expensive island home?
Now, water, that's different and would be appreciated by most North island residents, plus, of course, it'd generate revenue.
Put the water in, build the road. It's not rocket science.