Gdańsk's Citizens' Assembly — Poland's First Binding, Sortition-Based Panel Born from a Deadly Flood

On 14 July 2016, 150.8mm of rain fell on Gdańsk within 24 hours, killing two people and causing millions of euros in damage. In response, facilitator Marcin Gerwin proposed to Mayor Paweł Adamowicz that the city convene a Citizens' Assembly to design flood-mitigation measures, rather than leaving the decision solely to officials or a referendum.
Between 26 November and 3 December 2016, 60–80 residents were selected by sortition, stratified to reflect the city's demographics, and met over four weekend days. They heard testimony from experts and affected residents on flood-mitigation options — including large retention reservoirs versus distributed rainwater ditches and small retention facilities — then deliberated and voted. Under the assembly's rules, any proposal receiving more than 80% support became a binding commitment the city administration had to implement.
Of 19 proposals put to a vote, 16 cleared the 80% threshold and were adopted as binding city commitments. When Gdańsk flooded again in 2017, multiple accounts credit measures stemming from the assembly's work with a faster, more effective municipal response, though independent researchers note the assembly's broader long-term policy influence has been mixed rather than uniformly transformative.
Gdańsk went on to convene further citizens' assemblies on air pollution, civic engagement and LGBT+ rights through 2019, at a reported cost of roughly €30,000 per assembly. The Gdańsk model — sortition, deliberation, an explicit binding-vote threshold — was subsequently adopted by other Polish cities, including Warsaw and Lublin, and is cited internationally (e.g., by the OECD's work on innovative citizen participation) as an early European example of binding local sortition-based deliberation.
Caution: Mayor Adamowicz, the assembly's political sponsor, was assassinated in January 2019, and available English-language sources document the programme's continuity and outcomes less thoroughly for the years since; some academic assessments also caution that the assemblies' influence on city policy beyond the founding flood-mitigation case has been limited.

Read the full analysis: https://www.resilience.org/stories/2017-11-22/solutions-how-the-poles-are-making-democracy-work-again-in-gdansk/