This afternoon, Mayor Stephanie Rawlings-Blake said, her administration will release the results of "sophisticated ground penetrating radar" tests conducted in the days after the landslide on East 26th Street.
The information is critical in determining how soon displaced residents can return to their homes, she said.
"We are in process of gathering information so that can inform the public about all of the actions that my administration took before the collapse as well as provide a thorough assessment of the structural integrity of the area both currently and leading up to the collapse," Rawlings-Blake said.
Rawlings-Blake said reviews so far haven't concluded whether the city or CSX, which runs the rail lines below the street, is responsible.
"While it is natural for everybody to say, 'Who is to blame?' We have to let the facts determine that, and that's what we're doing right now," she said. "
The mayor said she expects "within weeks" the results of an internal assessment to determine whether "citizens' complaints about the street were adequately handled and coordinated with CSX."
"It's just not instant," she said. "We want to make sure that we give you everything at the same time, so it's not in dribs and drabs, so there is no way to misinterpret what we're putting out."
Meanwhile, she said, engineers are working "around the clock" to develop plans for permanent street repairs. So far, the engineers have finalized designs to temporarily stabilize the ground.
Housing officials and engineers also are continuing assessments of other areas of the city that experienced excessive flooding to determine whether the ground and vacant structures are stable. They are also assessing the risk following the extreme cold temperatures, snow and rain in recent months.
"I have also ordered the city police to continue to monitor the site and pay careful attention the homes that cannot be occupied right now," Rawlings-Blake said.
A headline on a previous version of this story incorrectly described the timing of the radar testing.