They'll never leave you alone
(media.scored.co)
Again it's a big depends. With big infrastructure projects like these you aren't going to have company A and B both lay water pipes along the same road, or even have two roads running in parallel right next to each other just for the sake of competition. What eventually happens is that each company claims its own 'turf' in which it runs a local monopoly, which is the worst of both worlds.