But they said the project to build a 500-room hotel, commuter-rail station for RTD's train to Denver International Airport and large public plaza is on budget and on time.
They also believe they can use Calatrava's designs.
"We have an unbelievable amount of material he has generated," said DIA manager Kim Day in a City Council committee meeting that was called to discuss the project.
Through its program manager for the South Terminal project, DIA has paid the architect and his firm $12.9 million for design work already done.
Read the rest of Jeremy P. Meyer and Jeffrey Leib's story in The Denver Post.
(Copyright 2011 The Denver Post)