Washington (CNN) Two major projects to build President Donald Trump's border wall using nearly $1 billion in Pentagon funds run the risk of being delayed due to a construction firm protesting the contracts won by two rivals.

One of the projects is for a $789 million border wall in Santa Teresa, New Mexico, which is in the El Paso sector of the border. The smaller project will be in Yuma, Arizona.

In a letter to the GAO, Fisher Sand & Gravel describes the solicitation as "unique (and highly flawed)."

"The process used by the (US Army Corps of Engineers) effectively suppressed competition and was designed to conduct an artificial process where the end result was known ahead of time by the (Army Corps) by essentially designating two firms as sole source contractors," the letter reads.

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