Milwaukee park replaces pavement with flood protection – cautious lessons for London’s public realm

A new park in Milwaukee, Wisconsin, has replaced a former paved surface with flood‑absorbing landscape, reducing downstream flooding while creating public space. The project, known as Davidson Park, was delivered through a public‑private partnership involving Harley‑Davidson and municipal authorities, and secured nearly $500,000 in grants. For London readers, the case provides a concrete example of how stormwater‑focused design can retrofit existing streets and lots into multi‑functional public realm – an approach increasingly relevant as the city faces more intense rainfall and pressure to deliver SuDS (Sustainable Drainage Systems) on tight budgets.

The project

Davidson Park occupies a site that was previously paved, presumably a parking lot or service area. By removing impervious surfaces and replacing them with vegetation, soil and designed drainage, the park now absorbs stormwater that would otherwise run off into the combined sewer system or local watercourses. The result is a reduction in flood risk for downstream areas. The park did not require a major land acquisition; instead it reused an existing hard‑standing plot, a model that could suit many under‑used paved spaces in London – from surface car parks to redundant service yards.

How it works

While the exact design details have not been published in the available material, the principle is straightforward: instead of channelling rainwater into drains as quickly as possible, the park holds it temporarily, letting it soak into the ground or be taken up by plants. This reduces peak flow during heavy rain, lessening the burden on drainage infrastructure. In London, the GLA’s Drain London programme and borough SuDS requirements already promote similar techniques – rain gardens, swales, permeable paving and tree pits. The Milwaukee example shows these can be applied at the scale of a single park, not just a large development.

Funding and partnerships

The grant of nearly $500,000 suggests the project blended private and public finance. Harley‑Davidson’s involvement points to corporate sponsorship of public realm projects that also improve neighbouring flood resilience. In London, the Mayor’s Greener City Fund and various borough community infrastructure levy (CIL) pots could support analogous schemes, though no direct equivalent has been announced. Partnerships with developers, BIDs or large employers could unlock sites where pavement conversion is feasible.

Relevance to London

London faces growing flood risk from surface water, with the London Climate Resilience Review calling for a step‑change in SuDS delivery. Retrofitting paved spaces into flood‑absorbing parks is one of the most cost‑effective measures available. However, the Milwaukee project is not a direct template: Milwaukee’s climate, drainage system, planning regime and grant landscape differ significantly. London boroughs would need to navigate their own stakeholder groups, land ownership constraints and funding cycles.

Caveats

The information available on Davidson Park is limited to the feed summary and title. No detailed design specifications, construction cost, maintenance plan or post‑implementation monitoring data have been reviewed. The flood‑reduction claims are attributed to the project partners and may not be independently verified. This draft should be read as an indicative reference, not a confirmed case study.

Source: Smart Cities Dive, “Harley‑Davidson replaced pavement with flood protection, creating a new Milwaukee park”, 23 July 2026. https://www.smartcitiesdive.com/news/harley-davidson-park-flood-protection-hga/826013/

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