The phrase "acknowledged concern that" is correct and usable in written English.
It can be used when discussing a recognized issue or worry that has been formally noted or accepted.
Example: "The committee has acknowledged concern that the proposed changes may negatively impact the community."
Alternatives: "recognized issue that" or "noted apprehension that".
Mr. Kavanagh acknowledged concern that the structures could become hangouts.
But some union leaders acknowledged that time was running against them, and some quietly acknowledged concern that the largest and most radical French union might be pushing the protests too far.
Administration officials have acknowledged concern that Democrats, particularly the Democratic nominee for president, will try to make use of the report's findings to embarrass Mr. Bush, especially if the report contains any suggestion that the White House failed to act before Sept. 11 on intelligence suggesting that a catastrophic attack might be imminent.
But administration officials privately acknowledged concern that the sophistication of the attacks is increasing and that some attacks, probably including the ones on Monday, have been carried out by people from other countries who have entered Iraq through Syria and Iran.
But he also acknowledged concern that too much pressure could destabilise Islamabad.
McVay sounded cautiously optimistic after describing the injury as a sprain, but acknowledged concern that it could be more serious or difficult to play through because of the physical demands tight ends confront on every play.
The Fed has acknowledged concerns that its easing could worsen inflation but has concluded that the immediate threats to the economy demand freer credit now.
Testifying to a Senate committee, Mr. Gonzales acknowledged concerns that such legislation might be overly intrusive and encroach on privacy rights.
Insiders questioned the legality of dealing with defence rather than health officials, and acknowledged concerns that supplies could be directed to the military first.
Mr McKeever acknowledged concerns that his organisation had "stoked up" attention on Mr Mitchell, adding that he would apologise to the MP if the new investigation showed he had been wrongly accused.
