The road is needed so that the heavy machinery can make it to their final destination. No use looking so far ahead as the hydro plant when not even the road can be completed on time and of a high standard.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .