The phrase "ancient infrastructure" is correct and usable in written English.
It can be used to refer to old or historical systems and structures that were built to support various functions, such as transportation, communication, or utilities.
Example: "The archaeologists discovered remnants of ancient infrastructure that once supported a thriving civilization."
Alternatives: "historical infrastructure" or "old infrastructure".
The L.I.R.R. is part of the cash-starved Metropolitan Transportation Authority, whose ancient infrastructure the state government has neglected for years.
Cayman islanders say the previous government spent a huge amount of money upgrading the island's ancient infrastructure, betting it would be able to pay back a budget deficit of $67.5m as its financial sector continued to grow.
With so many people now travelling by train, there are many more services operating on ancient infrastructure.
Further along the road, we pass another feat of ancient infrastructure - Sigiriya, a medieval castle city perched on the top of a huge outcrop of rock.
Here in South O.C., due to ancient infrastructure and EPA regulations, fires are fought using exclusively potable supply lines.
"City services really are not adequately meeting its needs--we have an ancient infrastructure there, and the schools are badly overcrowded," Councilwoman Gloria McColl said two weeks ago at a public hearing on the ordinances.
It carries deep links between ancient water infrastructure and civilization.
A drought is testing the state's ancient water infrastructure and threatening farms.
Built "green" back in the '80s, it had the ancient, makeshift infrastructure one would expect.
Throughout Jordan and along the Dead Sea Rift, one can discover links between ancient water infrastructure and civilization.
Some sail the low seas of NYC in order to explore boat graveyards, ancient waterfront infrastructure, or other unlikely enclaves of beauty, as well as orchestrate elaborate naval shenanigans for art and entertainment.
