At approximately 1:00 PM today, a depression appeared on Day Boulevard in South Boston, directly over MWRA’s South Boston CSO Tunnel Project.

All four lanes were closed to traffic. (see update).

Tunnel mining is continuing and no injuries or damage to equipment have been reported.

Once the site is deemed stable and fully assessed for safety, MWRA will temporarily fill the depression and cover it with steel plates in order to open as many lanes as possible.

Updated 05/27/08 at 4:21 pm

As 4:21PM, three out of four lanes on Day Boulevard are open:
- One open lane heads toward Castle Island.
- The other two open lanes head toward Dorchester.
One lane will remain closed overnight as MWRA continues repair work.

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Past updates

Updated 05/27/08 at 3:35 pm

As of 3:35 PM, two lanes of Day Boulevard heading toward Dorchester are open for traffic.
Two lanes heading toward Castle Island are still closed.
MWRA crews are working to open one lane heading toward Castle Island by 5:00 PM.
One lane will remain closed overnight.
MWRA plans to sequence repair work so that two inbound lanes will be open for morning rush hour.
At this time, MWRA plans for all four lanes to re-opened sometime tomorrow.

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Updated May 27, 2008