BOSTON (AP) – The final series of repairs to Big Dig tunnels following last summer’s fatal ceiling collapse are almost finished.

Repairs to the I-90 westbound Connector, which links traffic from the Ted Williams Tunnel to the Massachusetts Turnpike, are virtually complete. Meanwhile, repairs to the I-90 eastbound tunnel – where 39-year-old Milena Del Valle of Boston was crushed in July – are about 80 percent complete.

They should be finished “in several weeks,” said Jonathan Carlisle, spokesman for the state Executive Office of Transportation.

Both tunnels will have to be inspected first by the state and then by federal officials, so their reopening may not come until several weeks after repairs are fully complete. The last major reopening occurred over Thanksgiving, when the state reopened “Ramp D,” allowing westbound traffic from the Ted Williams Tunnel to connect directly to I-93 north- and southbound.

Del Valle’s July 10 death is still the subject of state and federal criminal investigations. Inspectors believe that bolts that held ceiling panels in place came loose because of failures in the epoxy resin designed to glue them in place.

Workers have been installing additional braces, larger mounting brackets and numerous “undercut” bolts that do not rely on epoxy to secure the panels to the tunnel ceilings.