The Ever Given, one of the world's largest container ships, became jammed across the canal in high winds on March 23, halting traffic in both directions and disrupting global trade.
On Sunday the court rejected a claim by Shoei Kisen, the Japanese owners of the vessel, to have the vessel released from detention.
The SCA announced this week that it was planning to extend a second canal lane that opened in 2015 by 10 km to make it 82 km long, and would widen and deepen a single lane stretch at the southern end of the canal.
The work had begun following directives from Egyptian President Abdel Fattah al-Sisi "to immediately start implementing the proposed development plan and put in place a timetable for completion as soon as possible".
An Egyptian court ordered the vessel's Japanese owner to pay $916 million in compensation as a result of losses inflicted when the Panamanian-flagged vessel blocked the Suez Canal
UK Club says it is the insurer of the Ever Given for certain third-party liabilities including obstruction claims or infrastructure issues but is not the insurer for the vessel itself or the cargo
The last 61 ships, out of 422 ships that were queuing when the vessel was dislodged on Monday, passed through the vital trade artery on Saturday, the Suez Canal Authority (SCA) said.
In total, 85 ships had been due to pass through the canal on Saturday including 24 ships that arrived after Ever Given was dislodged, the SCA said.
The investigation will include examining the seaworthiness of the ship and its captain’s actions to help determine the causes, Rabie advisor Captain Sayed Sheasha said.
The blockage threw global supply chains into disarray, threatening costly delays for firms already wrestling with COVID-19 restrictions, and nearly doubled rates for oil product tankers.
The Ever Given's grounding across a southern section of the canal forced a halt to all traffic, leading to a build-up of 422 ships at either end of the canal and along its course.
SCA Chairman Osama Rabie said he hoped it would not be necessary to resort to removing containers from the ship to lighten its load, but that strong tides and winds were complicating efforts to free it.
"As we wait for the normal movement of ships across the Suez Canal, which could be an unknown period of time, and to assure basic services continue for Syrians... the ministry is currently rationing some oil products," an oil ministry statement said.
If that attempt is unsuccessful, another effort will be made on Sunday morning, the sources said. To refloat the ship, it could be necessary to remove further sand from around it, they added.
The Japanese ship was stranded in the Suez Canal, a major trade route connecting Asia and Europe, on Tuesday, disrupting several ships on the Suez Canal, also disrupting international trade and sending several companies back to Africa.
The giant ship ran aground on Tuesday. The Suez Canal stepped up efforts on Friday to free the ship and end a blockage on the main route for European imports of LNG from the Middle East and for some cargoes heading to Asia from the Mediterranean.
There are now six LNG vessels waiting to enter the canal, with four of them at the southern Red Sea end and two in the Mediterranean, according to data intelligence firm Kpler. A seventh ship is already in the canal, the data showed.
"The problem is that the Suez Canal blockage is the straw that breaks global trade's back," the study's authors wrote.
"First, suppliers' delivery times have lengthened since the start of the year and are now longer in Europe than during the peak of the COVID-19 pandemic."