Update (10:06 a.m. Tuesday): Arlington County has re-opened Clarendon Boulevard, though neighboring streets remain closed. The county cautions drivers to expect delays near the construction site. An alert that Clarendon had re-opened was issued at 7:01 a.m.
Update (5:57 p.m.): Arlington County has issued an alert stating that both lanes of Clarendon Boulevard between North Pierce and North Oak streets will remain closed through the Tuesday morning rush hour. The county is encouraging motorists to use Lee Highway or Arlington Boulevard as alternate routes. ART bus route 45 and Metro bus route 38B will continue to be detoured.
Original story: Arlington County and Clark Construction officials are working to repair a weekend retaining wall collapse that has closed Clarendon Boulevard, the main eastbound thoroughfare through Rosslyn.
"We are hoping Clarendon will be open (Tuesday) morning for rush hour. We don't know that yet. We are going to assess every five hours," said Shahriar Amiri, the county's chief building official.
"The side roads, we are not sure of yet. There's a lot of activity happening, in terms of getting to the site and doing repairs."
Sunday night, .
The $140 million Sedona and Slate project mixes apartments and townhouse. The JBG Cos. hired Bethesda, Md.-based Clark Construction Group as the general contractor for the project.
When announced, the project's anticipated completion date was early 2103. So far, it's unclear whether that will change.
"Clark is still assessing the situation, and has not made such a determination at this time," said Louise Pulizzi, a spokeswoman for Clark.
County officials have not yet determined what caused the mishap.
"Not quite," said Amiri, at the end of a 31-hour stint without sleep.
"We suspect it was too much rain, and the hydraulic pressure behind the shoring. Right now we are trying to stabilize the site. That's the process we are in."
Amiri said it was "too early" to say whether the county would issue any citations, but said such citations would generally require that the problems at the site be fixed, which is what Clark Construction is working on now.
The Arlington County Fire Department was called to the scene Sunday night, and cleared it at about 3 a.m. Monday, said Lt. Gregg Karl.
A nearby four-story apartment building was evacuated. Officials said they were not aware of any injuries.
The evacuated building has 32 units, Amiri said.
"People are not moving back in. Right now we are in the process of shoring the building," he said Monday afternoon.
"There was slight movement of that building, and we want to prevent it from moving any more. So, we'll start shoring that building in the next two to three hours."
This story was updated to include a comment from Clark Construction Group.