Facebook is currently still constructing a data center in Altoona, Iowa, which spans 476,000 square feet. While this facility has yet to start its operations, the social network firm has announced that it plans to construct a second facility right next to the first one, according to TechCrunch.

The firm still has to go through regulatory process for the approval of the second facility's construction, which will be around the same size as the first structure. Facebook said 460 people were involved in first building's construction. A total of 435,000 working hours were accumulated by these people, the report detailed.

Iowa has become one of the top choices for data center locations for big corporations. One of the factors that influenced Facebook's decision to choose Iowa is the favorable tax climate in the place. In 2013, the social media firm received $18 million in tax credits, Des Moines Register reported. The company also struck a deal with Altoona that exempts it from property taxes on the data center for 20 years, the report stated.

Facebook operates other data centers in Oregon, North Carolina, and Sweden, TechCrunch reported.