Washington’s income from the solar farm at the city-owned Warren Field Airport is going to be a little more — about $1,200 a year — than first expected.

The City Council, during its meeting Monday, is scheduled to authorize the city manager to sign an amendment to the project’s ground lease and easement agreement and an amendment to the project’s memorandum of lease.

The increase is the result of the solar farm taking up more acreage than originally planned, according to a city document. The solar farm project was anticipated to use 34.3 acres of land.

“After completing the project the final  ‘as-built’ survey reflected an additional 1.6 acres of built upon land (total 35.9 acres). These amended documents reflect the change in additional acreage and subsequently the additional ease payments for the same,” reads a memorandum from City Manager Brian Alligood to Mayor Mac Hodges and the council.

The solar farm generates five megawatts of power, enough to serve about 1,000 homes. The solar farm, which began operating December 2013, has 23,000 solar panels. The power is provided to the N.C. Eastern Municipal Power Agency, of which Washington is a member.

Last year, city staff worked with Duke Energy Renewables on bringing the solar farm to the city-owned airport. The Airport Advisory Board endorsed the project. The board believes the revenue generated for the city by the solar farm will help offset some airport-related expenditures, according to a 2013 memorandum from Allen Lewis, the city’s public-works director, to the mayor and council members.

Last year, the council approved leasing airport land to Washington Airport Solar LLC for up to 15 years (an initial five-year term with options for two additional five-year terms), with rent at $1,200 per acre per year. The ground lease was for 34.3 acres. The solar farm is south of the intersection of runways 5-23 and 17-35.

The council also approved a ground easement agreement, solar skyway easement and an indemnity agreement between the city and Washington Airport Solar.