Stoss Landscape Urbanism


Erie Street Plaza | Milwaukee Wisconsin |

Erie Street Plaza
The variegated surface extends into the steel marsh, which collects and cleans stormwater from the site. ©Stoss Landscape Urbanism
Erie Street Plaza is a small urban plaza in the Historic Third Ward district of Milwaukee, Wisconsin. The 13,000-square-foot plaza lies at the point where the Milwaukee River meets the Federal Channel as it empties into Lake Michigan. It is the final link in a series of public space activators along the Milwaukee Riverwalk, a three-mile pedestrian and bicycle corridor that connects downtown Milwaukee to the emerging and redeveloping Third Ward, Beerline Districts, and the lakefront beyond. At the beginning of the project’s design, the future of Erie Street Plaza – its users, its function, its programming, even its necessity – were undecided. The urban context was generally one of infrastructure and industry; the site lacked neighbors and potential users. The site itself was a surface parking lot, subject to harsh environmental conditions, including high winds off the lake. Who is it for? How will it be used? This uncertainty, this open-endedness, was at the core of its design.

Erie Street Plaza
View from Erie Street towards the river. ©Stoss Landscape Urbanism
With no set program and no immediate stakeholders, flexibility was key. The plaza was conceived as a civic plain – simply articulated and open-ended – that would foster social and environmental activity and appropriation. The site’s variegated surface accommodates a wide range of potential uses and activities: art festivals, gatherings, concerts, movies, weddings, festivals, farmers’ markets, and winter carnivals, as well as less intense, every-day activities like boat-watching, fishing, sunbathing, and simply hanging-out.
Erie Street Plaza
Given the uncertainty of the site’s future context at the time of design, programmatic flexibility was a key consideration. ©Stoss Landscape Urbanism
The plaza is an understated assemblage of simple parts, both familiar and exotic, that pulse with the life of the Third Ward, the Riverwalk, and this unique confluence of ecological systems. The plaza is wrapped by local infrastructural and geographical frames – wooden boardwalk from the downtown Riverwalk and steel bulkhead from the Lake. Rather than following the water’s edge, the Riverwalk traces the site’s inland perimeter, reinforcing the plaza’s connection to the river, and its accommodation of ephemeral inundations.
Erie Street Plaza
Site plan. ©Stoss Landscape Urbanism
The project grows from three hybrid ecologies that step down across the site towards the water: radiant grove, flexible field, and steel marsh. The radiant grove occupies the upper end of the vegetal gradient, at the plaza’s urban edge. The poplar grove is positioned to shelter the rest of the plaza from cold winter winds yet are deliberately transparent to allow for views and safety. The grove maintains a dense straight line parallel to street edge but opens up toward the river.
Erie Street Plaza
Contrasts in material texture are important: the light bark of young poplars, the synthetic glow of fiberglass, the weathered steel of aged infrastructures. ©Stoss Landscape Urbanism
Erie Street Plaza
View from the upland terrace across the plaza to the lower wetland and the river beyond. ©Stoss Landscape Urbanism
Erie Street Plaza
Detail of the steel marsh and plaza edge. ©Stoss Landscape Urbanism
The primary element – the flexible field – is a hybridized plaza-green, with pavers and lawn surfaces that allow for both intense activity and more passive use. The plaza is articulated as an eroded field of custom pre-cast pavers distributed to maximize variability and flexibility. The plaza’s indeterminacy is accentuated by the erratic scattering of seatwalls and luminous fiberglass benches, which capture and reflect ambient light and project light from within. Their irregular placement allows for multiple and diverse social groupings or solitary retreats, in shade or full sun, protected or exposed. The luminous qualities of the fiberglass are accentuated as night falls, projecting light from within and reflecting the passing headlights of automobiles. The glowing benches have become a signature element of the project.
Erie Street Plaza
The project plays on light and weather, establishing a new civic presence embedded within its context of infrastructure and water. ©Stoss Landscape Urbanism
The variegated surface extends into the steel marsh, which occupies the lower end of the plaza gradient at the river’s edge. Capturing and cleaning site stormwater, the steel marsh is key to the site’s stormwater management strategy. Lowering the grade behind the bulkhead wall allowed for the collection of site stormwater in a perched position above the river, newly protected from industrial activities and barge wakes. Native marsh grasses of the type displaced by the site’s infrastructure and industry thrive in this sheltered location.