Alliant Energy subsidiary Interstate Power and Light (IPL) has received approval from Iowa Utilities Board (IUB) to increase its wind expansion programme in the US state.

The company is planning to add 1GW of new wind energy in the state by 2020, which is enough to power 430,000 regional homes.

For the wind farm expansion, the company intends to invest $1.8bn in Iowa by the end of 2020.

The construction of new wind farms will create hundreds of construction and other jobs, as well as strengthen the regional economy by generating new revenue through additional property taxes to communities and payments to landowners.

“Wind energy is a major part of our transition to a clean energy future.”

Alliant Energy president Doug Kopp said: “Our wind energy initiatives help keep rates competitive, enhance our environmental stewardship and drive economic growth in our communities. Wind energy is a major part of our transition to a clean energy future.”

Construction works have already begun at the Upland Prairie Wind Farm, which is located in Clay and Dickinson counties in north-west Iowa.

Alliant Energy is planning to initiate construction works at English Farms Wind Farm in Poweshiek County later this year.

The energy firm anticipates that nearly one-third of its Iowa total capacity will be generated through new and existing wind farms by the end of 2020.

Last August, IPL filed an application with IUB for advance rate-making principles.