Not going to defend the City, but people take the announcement of completion far too literally.
More than likely they announced it was completed because the contract achieved "substantial completion".
This is a contractual term, which means that the property is fit for occupancy, the municipality issues Occupancy Permit, and the Owner or Tenant can take possession.
It does not mean than 100% of the work is completed. Not by a longshot in many cases.
I have worked many, many projects that achieved SC and has plenty of work left to achieve substantial performance of the contract.