Construction of a downtown Dallas park will start next month with a groundbreaking ceremony April 17.

The 3.4-acre Pacific Plaza — bounded by Pacific Avenue, North Harwood and North St. Paul streets, and the One Dallas Center skyscraper — will stretch over what is now a city-owned parking lot and incorporate tiny Aston Park across from the Majestic Theatre.

A portion of Live Oak Street will be covered by the new park. Commuters should look for traffic alerts in the coming days.

The $15 million public space is a project of Parks for Downtown Dallas, which is donating the money for development. But the park will belong to the city of Dallas. The nonprofit is chaired by Robert Decherd, the former chief executive of The Dallas Morning News' parent company, A.H. Belo Corp.

The nonprofit has partnered with the city of Dallas to develop three other public parks: Harwood Park, West End Plaza and Carpenter Park. Those parks will be built with public and private money.

Pacific Plaza is expected to be completed in 18 months.