We puchased our first home in July 2014 and are starting to do some improvements. We have a solid poured concrete walkway that has sunk below the intended grade over the years. I have fixed the water issues but now I am stumped on fixing the walkway. With this being a solid poured walkway I can't just lift the sunken portions of it and relevel. Since the walkway has sunk about three inches it has become a place where rainwater pools and has also killed the grass in the front yard because of the constant saturt****. I know there are practices out there for Mudchacking and Polyjacking but I do not know it it would be a cost effective solution to the problem since we are also wanting to change the design of the walkway. I am wondering if you could provide some insight on what could be a solution for this. would I be better served to take out the existing concrete and repour the entire walkway and have it designed to our liking or fix the sinking concrete and add to it with now concrete to achieve our design?