The city of Eugene has unveiled its preferred conceptual design for the 4-acre community park and plaza that will be the centerpiece of the proposed redevelopment of the downtown riverfront property.

The design features a plaza, kids plays area, riverfront seating, picnic grove, river overlook, new walking and biking trail, and an improved connection to the Peter DeFazio Bridge.

The city has launched an online survey to get residents' comments about the design before it take the next step toward project construction. The online survey includes numerous renderings of the look of the proposed park. The survey closes Oct. 12.

The design was created by a team led by Walker Macy, a Portland-based landscape architecture. The city paid nearly $650,000 for the work.

The city unveiled three options for the design in July, and then merged those into the preferred design after reviewing comments from an earlier survey.

The majority of residents have said they want a park with a mix of urban and natural amenities with a focus on nature-based play and river overlooks.

The park would be created on a narrow stretch of the former EWEB utility yard along the river, across from Alton Baker Park.

The city has partnered with Portland-based developer Williams/Dame & Associates to turn the derelict industrial strip into a vibrant urban neighborhood with 215 apartments, 70 townhouses, an affordable housing complex with at least 75 units, retail space, a restaurant and a 125-room hotel.

The city has estimated that construction of the community park and connected plaza will cost about $10 million.

The city has estimated spending about $12 million on infrastructure work such as streets, utilities and sidewalks for the Williams/Dame portion of the development, which the firm pegs at more than $100 million once it is fully built.

Construction of the park is expected to begin in 2020, with its opening in time for the start of the World Track & Field Championships the following year, city officials have said.