SAN FRANCISCO -- Bay Bridge work crews have finished installing steel shims that serve as a temporary fix until the permanent solution for broken seismic stabilizers is completed in December.

The bridge oversight committee announced Monday that the shim installation was completed over the weekend. The installation was one of the tasks that had to be completed before the bridge opens to traffic Sept. 3.

The shims, installed in large rocker bearings adjacent to two broken stabilizers, or shear keys, will allow the bearings to absorb the motions generated during an earthquake while the stabilizers are repaired.

The permanent $15 million repair involves installation of an exterior steel saddle and steel cable assembly that will handle the loads intended for large anchor rods that snapped in March. The 32 broken rods were among 96 embedded in the seismic stabilizers east of the new tower. The stabilizers help keep the bridge deck and columns aligned during an earthquake.