Altoona City Administrator Jeff Mark is ready for the suspense surrounding  a big project that probably will happen in his city -- but might not -- to end. The sooner the better. City officials have been negotiating with representatives of a mystery company since 2011 over what is believed to be a $1.5 billion data center north of Interstate 80. Last week, the city's planning and zoning commission approved increasing the size of the project by 300,000 square feet, to nearly 1.4 million square feet. To Mark, that would suggest that a final deal is near. The city has approved everything it can approve for what is being called the Catapult Data Center. The biggest names in the data search business have been bandied about, but Mark says he doesn't know yet who the company is. He does know that the spring construction season is rapidly approaching, and he would think the company would want to get a start on the project. The city has not heard whether a sale of the property is imminent, he said. "They don't tell us much," he said. Others say that a sale could close yet this month.