The survey crew was back to locate the precise building corners and the height of top of footing. This allows the foundation to not only get placed in the right spot, but also the right elevation.  Without extremely close tolerances here the main floor elevation, a regulated measurement of the  permit, could be off.  This could result in the building being over-height, and that would be a really difficult situation to deal with.

Past mistakes on job sites have led to builders' being forced to take extreme corrective measures, like cutting off the top of roof trusses to shorten the building.  The city can take a very defensive posture on approving any height overages after the framing is complete.

This makes having the footing height exactly right a fairly major task for any inner city project.  We look to be in good shape right now and while we have lost further days due to scheduling conflcts, we plan to have the basement done next week.