The phrase "a complementary project" is correct and usable in written English.
You can use it when referring to a project that enhances or completes another project, often in a collaborative or supportive context.
Example: "The new initiative is designed as a complementary project to our existing sustainability efforts, aiming to further reduce our carbon footprint."
Alternatives: "an auxiliary project" or "a supportive project".
if there is such a complementary project, describe the efforts that will be made to coordinate the projects.
A complementary project with co-financing from the Global Environmental Fund GEFF) is soon to be up and running.
Not content with tackling Ceará's rural drinking water challenges, CWC and PepsiCo Foundation are implementing a complementary project to better use the state's reservoirs.
A complementary project run by the UN children's agency, Unicef, using the same Kizilay card, pays a top-up to households where children meet 80% school attendance.
The Blue Obelisk provides also a complementary project, the Chemical Structure Repository [83].
A complementary project is ongoing in India, testing the water quality of the Godavari River in southern India and how it reacts to weather, pollution, fishing and general use.
In constructing a shore protection project or separable element under this paragraph, the Secretary shall, to the extent practicable, coordinate the project or element with any complementary project identified under paragraph (2)(C).
Before the storm, the city and its parks department began restoring 127 acres of wetlands throughout the city, while a complementary pilot project was planned to redevelop 10 acres of wetlands in hopes of spurring business along the shoreline.
The parameters considered in the tests have been defined from a consideration of the limitations of the current parametric approach adopted in Annex B of the ENV version of Eurocode 1.2 [1] and from the requirement to validate the program OZONE developed in the scope of a complementary research project.
Ecosystem service providers also benefit from complementary project activities, such as forest management training and agricultural extension support.
Then a set of complementary projects would be devised.
