MCALLEN, Texas (AP) — Federal authorities have given a $145 million contract to a Texas company to build six miles of wall along the U.S.-Mexico border in the Rio Grande Valley.

U.S. Customs and Border Patrol said Friday that SLSCO will begin construction of an 18-foot reinforced concrete levee wall in February with in the agency’s McAllen station region. The company will also increase the height of existing fences.

It will be the first section of President Donald Trump’s border barriers in the Rio Grande Valley, the busiest corridor for illegal crossings.

The government recently completed construction of a 2-mile, 30-foot tall section of fencing along the border in California.

Trump has been ramping up immigration rhetoric heading into Tuesday’s midterm elections and has ordered troops to the border to meet a caravan of Central American migrants traveling through Mexico.