Traders concerned about losing business while the Hole in the Wall passage in Spalding is closed may be able to claim compensation.
National Grid will be visiting them on Monday to discuss the work and give details of its compensation scheme.
A spokesman said: “National Grid is carrying out essential work to renew the gas mains in the Hole in the Wall Passage.
“This work will ensure we can keep the gas flowing to local homes and businesses for decades to come.
“We will need to close the passage for two weeks, starting on February 23, while the work is being carried out.
“We apologise for any inconvenience this may cause and will be visiting businesses on Monday to discuss the work and provide details of our business compensation scheme.
“The scheme will involve replacing the existing iron mains with hardwearing plastic pipes which have a lifespan of at least 80 years.”