The phrase "backfilled by" is correct and usable in written English.
You can use it when referring to a situation in which a need, such as a position or resource, has been filled after having been left empty. For example, "The production technician role was backfilled by Mary after John left the company."
But, he added, "I was assured that the space in Lower Manhattan would be backfilled by high-paying jobs over the next several years".
"Because we will end up with people drowning at sea again and the vacancies that we create by taking people off Nauru and Manus would quickly be backfilled by new arrivals".
But by 4 18 p.m., the hole had been backfilled by the city's Department of Environmental Protection, the blocked-off part of the street had reopened and normal bus service had resumed.
The site was mined for sand and gravel and backfilled by 10 m of mine spoils with 1 m of natural soil over the fill.
The gaps between the protein and between patterns were backfilled by incubation of the whole surface with TEG-thiol.
After photocatalytic nanopatterning, the n-alkanethiolate self-assembled monolayers were rinsed in ethanol and modified regions were backfilled by dipping the samples for 10 min in a 10 mM solution of either 11-mercaptoundecanoic acid (for dodecanethiol SAMs), or dodecanethiol (for 11-mercaptoundecanoic acid SAMs) for 2h.
Finally, with great care the nest is backfilled, and then concealed by her pulling leaf litter over the nest site.
At the same time, other players such as large family offices have stepped up their investments in funds and backfilled the holes left by a lack of pension funds in the market.
The reaction mixture was then degassed during heating to 100°C and backfilled with N2 followed by further heating to 250°C over a period of 8 h.
After the consolidation and leveling of the sediment, the stripped surface soil and subsoil were backfilled onto the sediment layer by layer with the bulldozer.
Injection needles (needle types: O.D. = 20 μm; BM100T-10, ends fire polished, beveled, Biomedical Instruments, Germany or Femtotip II, Eppendorf, Germany) were backfilled with 10 μL substance by a Microloader (Eppendorf, Germany).
