In June 1986, CTL issued a final report that found that the tunnels of the Archer Avenue and 63rd Street Lines were structurally sound. The report had been ordered by the MTA after UMTA stopped payments on $75 million in grants for the projects, which were 90 percent complete. While the grants were frozen, for a year, the MTA spent $22 million of its own funds to complete existing contracts and to maintain them. The study was requested to show that it was possible to fix leaks and cracks in both projects and an improperly altered ceiling girder in the 63rd Street Tunnel. If the study was approved, work projected to resume in January. It found that there were minor flaws in the projects, such as flaking concrete on a portion of the Archer Avenue tunnel wall, and uneven welds in the altered girder in the 63rd Street Tunnel. The report recommended some rewelding, the removal of stalactites, filling air pockets in some sections of concrete, the removal of debris, waterproofing, and the use of weak electrical charges to prevent corrosion of steel beams.