we've changed up the critical items and schedule instead of that millstone lizzi wanted to provide for reference those are the major trade and the work is in progress and nearly complete as the train box the black line was planned from the 2011 baseline schedule that web core provided in the orange, yell boars that major active. and we'll continue to track against this i think it's more easy to interpret the overall impact of the activity than the milestone graphic we had before. this is the below grade concrete timeline we've seen obviously, the ground is complete and the waterproofing continues we have 5 map slab pours remaining and one is scheduled for the end of june and another one in july and those anothers for september the lower concourse slab is being completed and the contra concrete is completed and the lower concourse slabs will be gone. as far as the low grade we trajectory that in the western and central zones the lift waldo's walls are the key to pitting in the lower slab are nearly complete and one hundred percent on the first lifts and over 90 percent in the central ea