In early 2009 sources in the Bush Foundation said they'd passed the $100 million level, and the same sources claimed $200 million by November, The Dallas Morning News reported Sunday.
But the foundation has yet to file financial reports past 2008, when federal tax filing showed it had $23.1 million on hand, the newspaper said.
Foundation officials declined to say what the present total is.
"We're on schedule with everything -- the building design, the fundraising," Mark Langdale, president of the Bush Foundation, said. "We're pleased with our programs."
The non-profit foundation will pay the construction costs for the facility on the campus of Southern Methodist University in Dallas.
SMU was among a number of Texas colleges and universities competing to be the site of the future library, and was selected in February 2008, the Morning News said.