Spain's Acciona Energia said Thursday it won contracts for the engineering, construction and provision of turbines for two wind farms in Mexico.

The contracts for the projects, which are worth nearly $650 million, also cover a 20-year operating period, Acciona Energia said.

The contracts were signed with a company formed by Cemex, Fisterra Energy and private investors, the Spanish company said in a statement.

Construction of the wind farms, which will each have 126 MW of generating capacity, is to begin in the second quarter of this year, with commercial operation expected to start in the second quarter of 2016.

The wind farms are being built in General Bravo, a city in the northern state of Nuevo Leon, and will have 84 3-MW turbines each.

Acciona Energia said the contracts would allow it to diversify its operations in Mexico, expanding its role as a supplier of products and services.

Cemex, which developed the project, said it would oversee construction and manage the wind farms without controlling the facilities.

The Mexican cement giant has a 5 percent minority stake in the project.

The project's capital structure is 75 percent debt and 25 percent equity, Cemex said in a statement. EFE