The operator of the enormous cargo vessel Dali, which collided with Baltimore's Francis Scott Key Bridge, now confronts criminal charges related to conduct before and following the incident that resulted in six fatalities over two years ago.

A power failure on the Dali stripped it of propulsion and control, sending it crashing into the bridge's pillars. This triggered a catastrophic collapse and shut down Baltimore's vital port for months.

Beyond Tuesday's newly announced charges, the vessel's owning and operating firms have navigated numerous lawsuits, most settled out of court.

Maryland authorities estimate rebuilding the busy bridge will require $4.3 billion to $5.2 billion, with full traffic restoration not anticipated until late 2030.

Below is a chronological overview of the collapse and key subsequent events:

12:39 a.m.: Departing the Port of Baltimore bound for Sri Lanka, the Singapore-flagged Dali stretched roughly 985 feet (300 meters) in length and 157 feet (48 meters) across.

1:25 a.m. to 1:28 a.m.: Power outage struck the ship; crew broadcast a mayday as it bore down on the Francis Scott Key Bridge at approximately 9 mph (15 kph).

Officers had roughly 90 seconds to halt traffic in both directions on the span.

About 1:29 a.m.: The Dali slammed into a bridge support, causing the structure to tumble into the Patapsco River almost instantly.

Federal probes commenced, gathering evidence from the vessel.

Engineers deployed alongside floating cranes to extract initial steel debris - a painstaking effort to secure the area for diver searches of missing construction workers and to restore shipping lanes at the port.

Grace Ocean Private Ltd. of Singapore, the owner, and Synergy Marine PTE Ltd., the manager, sought court protection to cap their liability.

Rescuers located the sixth and final construction worker's body. All victims were Latino immigrants on night duty patching potholes atop the bridge.

National Transportation Safety Board preliminaries highlighted the ship's electrical failures while berthed in Baltimore, without linking them directly to the pre-crash blackout.

NTSB records revealed a loose cable in the transformer's breaker setup, activated by crew prior to leaving port.

On September 18, federal authorities sued the owner and operator for overlooking electrical issues, demanding $100 million.

Maryland sued next, joined by Baltimore longshoremen in a class action for lost wages during the port closure.

The owner and operator settled Justice Department claims by paying over $102 million for cleanup.

Maryland revealed plans for a taller replacement Francis Scott Key Bridge at $1.9 billion.

NTSB noted Maryland's transportation department skipped a recommended bridge vulnerability study that might have flagged ship-strike dangers.

The owner and operator countersued shipbuilder Hyundai Heavy Industries in federal court over alleged flaws in a key switchboard.

Maryland sharply raised rebuild costs to $4.3 billion - $5.2 billion range.

NTSB pinpointed a loose wire as the blackout culprit robbing propulsion and steering; crew could have spotted it via infrared scans beforehand.

The firms announced settlements with Maryland and ACE American Insurance Co., including $350 million to match the insurer's payout under the state's policy limit.

Federal prosecutors unveiled charges against the operator and a top executive for crash-contributing choices and subsequent cover-up attempts.

On Tuesday as well, Maryland's attorney general revealed the $2.24 billion figure for the prior state settlement with the owner and operator.