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Boulder’s climate strategy has been built around a local revenue stream, iterative learning, and pushing local technical and political capacity, Jonathan Koehn told John Farrell. Boulder voters approved a utility‑bill surcharge in 2006 to fund the city’s Climate Action Plan; that tax began focused on electricity but was broadened over time. During a ten‑year municipalization inquiry beginning in 2010 the city replaced the lost 3% franchise fee with a Utility Occupation Tax (UOT) to pay municipalization expenses. In 2020 Boulder folded the UOT into an expanded climate tax (now about $6.5 million annually, with $1.5 million devoted to wildfire resilience), authorized bonding against future revenues, and added low‑income exemptions to address regressivity.
Koehn described how Boulder moves between regulation, incentives and technical capacity. Early programs emphasized audits and rebates, but low audit→action rates pushed the city to pair financial incentives with regulation — most visibly in SmartRegs, the nation’s first rental‑housing efficiency requirement, tied to rental licensing and a 10‑year compliance window. Boulder used funds for targeted, equity‑focused projects (a city‑owned community solar garden for low‑income mobile‑home residents; repairs and heat‑pump conversions after the Marshall Fire). Staff evaluation also led Boulder to abandon or reframe some programs: a two‑year, income‑qualified e‑bike rebate (~$500,000) is now seen as a lower‑value transportation spend compared with other investments.
Boulder also invested in technical expertise and scaled advocacy. Koehn highlighted a city distribution‑system engineer who maps critical facilities, advises on public safety power shutoffs (PSPS), sectionalization, and neighborhood storage/microgrid siting — a role Xcel consults regularly. After pausing municipalization in 2020 Boulder negotiated a novel franchise/partnership/settlement with Xcel Energy that ties deliverables to outcomes, includes year‑over‑year emissions targets that helped accelerate retirement of Comanche 3 to 2030, and preserves an opt‑out. Finally, Boulder has pushed collective action: it helped found Colorado Communities for Climate Action (47 jurisdictions) and helped seed a regional electrification effort that leveraged a $200 million CPRG grant, using scale and coalition power to influence state and utility policy.
Jonathan Koehn (Director of Climate Initiatives, City of Boulder) said Boulder created the nation's first voter‑approved local 'carbon' tax in 2006 as a surcharge on utility bills (collected by Xcel Energy) to fund the city's Climate Action Plan.
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