Essex & Suffolk Water has said its works at Gallows Corner are "on track" for completion at the end of August.
The water company confirmed it is preparing to move into the testing and commissioning phase of its works this week, marking the final stage before the site is handed back to Transport for London (TfL).
TfL will then carry out resurfacing and reinstatement works before the junction can be fully reopened - however TfL has not confirmed how long this will take.
In its latest update on Friday (July 31), Essex & Suffolk Water said: "Our team has remained on track with the timelines discussed at the stakeholder site visit on 3 July and we can confirm that the complex repair part of our work will be completed in the coming days.
"We continue to work closely with TfL and remain focused on completing the remaining work as quickly and safely as possible, to allow TfL to restore full access to the road network while protecting vital water supplies.
"We are very sorry for the ongoing inconvenience caused by these works.
"All parties are working to complete the remaining activity with the least possible additional disruption."
Plant and materials will also begin to be removed from the Gallows Corner site this week, although excavations on Southend Arterial Road and Eastern Avenue will remain open.
This is to allow for the final connections to be made at the end of the testing and commissioning phase.
Gallows Corner has been the site of roadworks for more than a year, with only part of the junction reopening in May due to ongoing water main replacement works.
These water works were originally planned to coincide with TfL’s flyover replacement to reduce overall disruption.
In a previous update, Essex & Suffolk Water confirmed that a central section of pipework had "successfully passed the pressure test", calling it a "significant milestone".
Specialist teams have been working inside the pipe to complete repairs, and TfL has confirmed it expects to take the site back by the end of August.
Both organisations have issued apologies for the ongoing disruption.
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