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An amphitheater, a hammock grove, and waterfalls could soon hang above the Anacostia River as part of an ambitious $40 million park project whose organizers announced the winning design on its website last night.

The city-backed 11th Street Bridge Park team selected a design from Netherlands-based OMA and Philadelphia-based Olin Studio over three other finalists for the planned park that will replace an old span of the 11th Street Bridge linking Anacostia and Capitol Hill. More than 40 teams initially submitted proposals for the park.

The winning proposal, called “Anacostia Crossing,” features two paths that cross in an X shape, with interactive art, boat launches, an urban agriculture area, and other attractions included. It edged out proposals for a wavy structure modeled on Frederick Douglass‘ old strolling route; a green network designed to memorialize old ferry crossings; and a “river balcony” with a billowy canopy.

The winning design will be formally announced this morning at THEARC, a theater and community center on Mississippi Avenue SE. The park isn’t expected to open before the summer of 2018. The city will cover just over half of the expected $25 million construction cost, a figure that doesn’t include operational costs.

Below are renderings of the park as envisioned by OMA and Olin, as well as a video produced by the Washington Post, which first reported the winning design.

Renderings from bridgepark.org