{"modelVersion":"fuf-depth-v2-2025-sources","sources":[{"publisher":"Internal Revenue Service, original return mirrored by ProPublica","title":"FUF FY2023 Form 990, EIN 94-2699528","url":"https://projects.propublica.org/nonprofits/full_text/202440179349300544/IRS990","published":"Filed 2024-01-17; fiscal year ended June 2023","retrieved":"2026-09-11","sourceType":"Original accrual-accounting return"},{"publisher":"Internal Revenue Service, original return mirrored by ProPublica","title":"FUF FY2024 Form 990","url":"https://projects.propublica.org/nonprofits/full_text/202541029349300739/IRS990","published":"Filed 2025-04-12; fiscal year ended June 2024","retrieved":"2026-09-11","sourceType":"Original accrual-accounting return"},{"publisher":"Internal Revenue Service, original return mirrored by ProPublica","title":"FUF FY2025 Form 990","url":"https://projects.propublica.org/nonprofits/full_text/202611049349302071/IRS990","published":"Filed 2026-04-14; fiscal year ended June 2025","retrieved":"2026-09-11","sourceType":"Original accrual-accounting return; preferred whole expense"},{"publisher":"Internal Revenue Service, original return mirrored by ProPublica","title":"FUF FY2025 Schedule O","url":"https://projects.propublica.org/nonprofits/full_text/202611049349302071/IRS990ScheduleO","published":"Filed 2026-04-14","retrieved":"2026-09-11","sourceType":"Original return supplement"},{"publisher":"Friends of the Urban Forest","title":"FY2025 Annual Impact Report","url":"https://www.friendsoftheurbanforest.org/_files/ugd/f2e7e3_ae868b6ce3ba4db3a155370c490f0046.pdf","published":"FY2025; publication day not established","retrieved":"2026-09-11","sourceType":"Official 13-page annual report; planting pp. 3–4, volunteers p. 9, finance p. 12"},{"publisher":"San Francisco Public Works Commission","title":"Workforce Development Grants Update","url":"https://sfpublicworks.org/sites/default/files/Commissions/July%2010%202025/Item_6%20PWC%20Workforce%20Development%20Grants%20Update%207-10-25%20v710.pdf","published":"2025-07-10","retrieved":"2026-09-11","sourceType":"City presentation; p. 20 FUF output as of June 30"},{"publisher":"San Francisco Public Works Commission","title":"Tree Planting Workforce Development Grant Agreement proposed modification","url":"https://sfpublicworks.org/sites/default/files/Item%204m_PWC%20Tree%20Planting%20WFD%20mod%202024-7-22%20v719.pdf","published":"2024-07-22","retrieved":"2026-09-11","sourceType":"Historical city proposal and performance reporting, not signed instrument"},{"publisher":"San Francisco County Transportation Authority","title":"Transportation Sales Tax Funds Cable Cars, Trees","url":"https://www.sfcta.org/blogs/transportation-sales-tax-funds-cable-cars-trees","published":"Undated page; project period through June 2026","retrieved":"2026-09-11","sourceType":"Official funded project account; nested figures not all FUF allocations"},{"publisher":"San Francisco Public Works","title":"November 2025 newsletter: tree planting and maintenance","url":"https://www.sfpublicworkstv.org/november2025","published":"November 2025; day not established","retrieved":"2026-09-11","sourceType":"Official public funding and implementation account"},{"publisher":"Friends of the Urban Forest","title":"Adopt a Yard Tree","url":"https://www.friendsoftheurbanforest.org/adopt-a-yard-tree","published":"Undated current page; funding through August 2027","retrieved":"2026-09-11","sourceType":"Official yard program, not street-tree marginal offer"},{"publisher":"Friends of the Urban Forest","title":"Ways to Give","url":"https://www.friendsoftheurbanforest.org/support-us","published":"Undated current page","retrieved":"2026-09-11","sourceType":"General giving pathway; not verified marginal capacity"},{"publisher":"Friends of the Urban Forest","title":"Annual Impact Report 2022","url":"https://www.friendsoftheurbanforest.org/_files/ugd/e4f6ab_a4af347f726145aa886715b3bcc2b540.pdf","published":"Reporting July 2021–June 2022","retrieved":"2026-09-11","sourceType":"Historical package illustration retained from prior evidence; not current quote"},{"publisher":"Environmental International; author manuscript hosted by US Forest Service","title":"The association between tree planting and mortality: A natural experiment and cost-benefit analysis","url":"https://research.fs.usda.gov/download/treesearch/65639.pdf","published":"2022-10-30 online publication","retrieved":"2026-09-11","sourceType":"Primary Portland ecological study, DOI 10.1016/j.envint.2022.107609"},{"publisher":"Arboriculture & Urban Forestry; 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volunteer hours known (6,806), their opportunity cost unknown","public-funded downstream maintenance and water not fully costed","resident time and infrastructure costs unknown"],"verdict":"EXPLORATORY / HOLD GIVING: source-updated accounting and volume, unchanged unvalidated health and funding priors; no verified marginal offer."},"volunteerIllustrations":[{"hourlyValue":25,"annualHours":6806,"matchedGiftResourceUsd":3145.0464363379942,"costPer10BayQaly":971305.6416282986},{"hourlyValue":50,"annualHours":6806,"matchedGiftResourceUsd":6290.0928726759885,"costPer10BayQaly":1000922.2005648785}]}}