'a significant backlog of' is correct and usable in written English.
You can use it to describe a large amount of work or tasks that have been postponed or need to be completed. For example: "Due to the current staffing shortage, there is a significant backlog of work that needs to be done."
In addition, Mr. Dillon wrote, commissioners' productivity is not monitored, creating "a significant backlog of cases".
Its sudden emergence has stressed the network, causing a significant backlog of pending transactions.
But Cameron said: "There is now a significant backlog of orders and we are confident of a strong Christmas season".
The explosion was a major setback for SpaceX, which has a significant backlog of commercial satellite launches.
Mr. Khuzami also said he faced a "significant backlog" of tips and referrals, including in the area of market manipulations and accounting irregularities.
The long delay is indicative of another problem highlighted in the Syracuse study: the system is overwhelmed, resulting in a significant backlog of cases.
The sporadic downpours could result in a significant backlog for tournament organisers, while further poor weather is forecast next week.
"There is a likelihood of a significant backlog in grant and renewal without an increase in the costs of a licence.
Richard Spires, deputy I.R.S. commissioner, warns of a significant backlog in processing returns, as well as confusion for the taxpayer.
Plans to put the Western Hemisphere Travel Initiative into effect two years ago were postponed because of a significant backlog in passport applications and delays getting sufficient staff and equipment in place.
Sadly, despite tens of millions of dollar in federal grants, a significant backlog remains.
