They replaced the existing asphalt with concrete. They ran out of concrete and tried to connect the new mix to the mix already laid more then 75 minutes after the first mix had already set, resulting in a "cold" joint, which you can see at the transition in the image. The second load of concrete was a different color and they had water from the garden hose running into the mix while it was being poured weakening the mix to the point where it would fail in a very short time. It began to spall and fail in less the 8 months. They were contacted numerous times to make good on their "warantee" but refused to fix it or accept any responsibility for their work, instead blamed it on "salt" being used on the concrete, even though no salt was used on it at all. Three independent contractors stated "Failure was due to poor workmanship, over watering, and overworking, NOT due to salt." They steadfastly refused to repair it. Had to get it repaired by another contractor at my expense. If you need any concrete work done, do yourself a HUGE favor and call anyone, but them, you'll be glad you did.