Three additional subcontractors working on the Obama Presidential Center have filed legal claims alleging they are owed nearly $900,000 in unpaid fees. The claims add to a wider series of payment disputes surrounding the high-profile construction project, raising further questions about financial pressures on firms involved in its development.

The companies filed mechanics liens against the centre’s property, a standard construction-law mechanism intended to help contractors recover unpaid amounts. The article also refers to a separate dispute in which Adamson Plumbing reportedly suspended operations and laid off 25 union workers while seeking nearly $4 million in payments connected to the project.