The new designs will incorporate the original train tracks from the High Line. View Full Caption Friends of the High Line

CHELSEA — Friends of the High Line showed off their initial design for the third and final section of the elevated park on Monday.

The new section, dubbed "The High Line at the Rail Yards," will be built on the section of former railroad tracks that wrap around the upcoming Hudson Yards project, from West 30th to West 34th Streets, stretching from 10th to 12th Avenues.

Friends of the High Line peg the total cost of the project at $90 million, with about a third of that coming from the Related Companies, which is developing Hudson Yards.

The initial plan builds upon the design of the first two sections of the park, including new "peel-up" elements, such as tables, benches, and even seesaws that appear to grow out of the park itself.

The design also works in concert with the huge new Hudson Yards development, weaving in and out of proposed skyscrapers there. The project will also include a performance space and a series of rubberized "play beams" for kids.

Construction will likely be done in phases, but Friends of the High Line has proposed building an interim walkway on the western half, allowing park-goers to experience the wild grasses and flowers of the undeveloped section until the project is complete.

Friends of the High Line and the city are hoping to complete capital construction by the end of 2013, with a public opening in spring 2014, but those dates could change based on funding.