Atlanta low-balled the event, but the city on Thursday hosted an industry forum that is an early step in the process of building a major park along the Atlanta BeltLine, at the old Bellwood rock quarry.

At the forum, Atlanta presented information to vendors who may want to help establish a water reservoir at the old quarry. While the reservoir is immensely important, the public’s attention has been more attracted to the prospect of a huge new park on the west side.

The Bellwood park could be more than three times the size of Piedmont Park, arguably Atlanta’s crowning urban jewel. Bellwood encompasses nearly 600 acres, compared to 185 acres at Piedmont Park, according to a 2004 feasibility study of the BeltLine.

Bellwood is to be developed in a manner similar to Historic Fourth Ward Park.

Bellwood is to provide for a reservoir and public space, using funds from the departments of watershed and parks. Historic Fourth Ward Park was built with funds from watershed and a parks improvement bond, and was created to manage storm water runoff and provide space for parkland and recreation.

The event on Thursday addressed just the water reservoir aspect of Bellwood.

Atlanta invited to the forum companies that may be interested in building the 2.4 billion gallon reservoir. Another piece of the project is a 5,000-foot tunnel, and pump, that is to deliver water to the reservoir from the Chattahoochee River.

The reservoir is to be complete in late 2021, according to a 2013 edition of Atlanta’s Comprehensive Development Plan. The cost of the reservoir alone is forecast at $46.1 million, according to the CDP.

Atlanta’s watershed commissioner, Jo Ann Macrina, emphasized the reservoir aspect of the Bellwood project in a statement released Tuesday:

• “The raw water system forms the foundation and starting point for delivering clean and reliable drinking water and fire protection. This program represents a major economic investment in Atlanta’s future, and the procurement process will support economic inclusion throughout the design and construction phases. We encourage the formation of diverse, expert teams as we expand Atlanta’s water supply infrastructure.”

Atlanta Mayor Kasim Reed said in the statement:

• “Water is one of our most precious resources and must be protected and sustained for future generations. Investing in our water infrastructure will ensure that we have adequate water availability and will allow for continued economic development. The new water supply program supports one of my goals of making Atlanta a top-tier city for sustainability.”

Once the reservoir is finalized, the city will be better able to discuss the components of a park.

City officials have said in years long past that they park is expected to have some sort of water feature, though it would be separate from the water reservoir.

The Atlanta City Council voted in October to propel the Bellwood park. The council created the Bellwood Quarry Redevelopment Review Committee. It’s supposed to deliver within six months its formal comments on the creation of park and recreational space at Bellwood.