The U.S. Navy awarded downtown-based Harper Construction Co. Inc. a $17.3 million task order that will take it to Orange County.

Under the deal, Harper will design and build a Marine Corps Reserve Training Center and vehicle maintenance facility at Naval Weapons Station Seal Beach.

The Navy may also exercise two options on the deal, which together would add about $150,000 to the task order.

Work is expected to be finished by February 2021.

The Naval Facilities Engineering Command Southwest of San Diego awarded the task order. It received three proposals.

Harper is receiving the work under an indefinite delivery, indefinite quantity contract awarded in April.