Action will be taken to prevent flooding after persistent problems in a busy road on the outskirts of the city.
Danish energy company Orsted will carry out a series of works to help combat drainage issues near its Hornsea Three offshore wind farm substation off the B1113 between Swardeston and Keswick.
It comes as local councillors say the main road has become prone to flooding - often making it "impassable" for drivers.
"This is exactly the issue we were trying to avoid when the permission was originally granted," said Deborah Sacks, who represents Keswick and Intwood at South Norfolk Council.
"I have been pushing hard on this issue since it has been impassable several times recently.
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"The county council as Lead Local Flood Authority seems to have dropped the ball by agreeing to drainage lagoons that aren’t up to the job.
"Orsted’s subcontractors are creating another lagoon so hopefully this will help in future.
"I am a big believer in renewable energy, but the delivery of these projects needs to be done properly if we are not to alienate people."
The electrical substation is a part of Orsted's Hornsea Project - a huge wind farm being built off the coast of Norfolk.
Speaking on the flooding concerns, a spokesman for the energy company confirmed a second drainage lagoon was now in operation and further measures were being discussed.
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“Recent severe weather has caused widespread disruption across the region," they said.
"We are aware that there are pre-existing flooding issues locally with a number of contributing factors.
"As a responsible developer, we take potential impacts of any works we carry out very seriously. We are actively working with local councils and stakeholders to address existing drainage issues in the area."
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Cllr David Bills, a county councillor for the area, welcomed the action being taken - adding Norfolk County Council's highways team is working with Orsted and National Highways to solve the "most unpleasant" issue.
Cllr Graham Plant, cabinet member for highways, infrastructure and transport at County Hall, confirmed: “We know the problems this is causing and are working with the developer and local landowners to ensure this is dealt with as swiftly as possible.
"A temporary measure to pump water to a nearby drainage lagoon is being developed, to help mitigate the flooding until a permanent solution can be put in place."
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