The phrase "approaching the scale of" is correct and usable in written English.
It can be used to describe something that is nearing a certain magnitude or level, often in a comparative context.
Example: "The recent developments in technology are approaching the scale of what we once thought was only possible in science fiction."
Alternatives: "nearing the magnitude of" or "coming close to the level of".
Similarly, a cluster of 100 or 1,000 microreactor chips could theoretically yield amounts of material approaching the scale of fine chemicals production.
The writers were brainstorming ideas for a spectacle: an elaborately designed comedic eye-popper, bigger than the "Meryl-Go-Round" or the "Mo'Lympics," possibly approaching the scale of Billy's Thanksgiving Day Parade, which aired last season.
That might be a greater toll than the Rwandan genocide and is approaching the scale of the estimated mortality from the Democratic Republic of Congo's overlapping, longer-running civil wars.
He's father had told him of a great disaster in 1939, he said; but he had never seen floods approaching the scale of these in his 51 years in the village.
With the numbers ratcheting up every week, this outbreak is approaching the scale of the 2006 baby spinach E. coli illness outbreak, in which 205 people became sick and five of them died.
Take the corporate scandals: neither livedoor nor the Murakami Fund represents chicanery or economic distortion on anything approaching the scale of America's Enron or WorldCom earlier this decade, they are far smaller entities.
Gallatin's coal ash problems do not approach the scale of earlier disasters, but people and communities are still affected.
The WikiLeaks' unauthorised disclosures of the last year are the first in 40 years to approach the scale of the Pentagon Papers (and even surpass them in quantity and timeliness).
Animals have been picking up the food scraps forever, but nothing in history approaches the scale of modern food waste.
The industry is starting to approach the scale of the wind industry, which saw over 5,000 megawatts of capacity installed last year (down from over 10,000 the year before).
The devastation approached the scale of a 1998 calamity in which 16 percent of the world's reefs died.
