Sustainability revolving fund (SRF) in Hillsboro. Established in 2010, this revolving fund supports projects that demonstrate economic, environmental and/or social returns on investment as well as address City’s sustainability goals. So far, the fund has supported five projects, whose generated savings or avoided costs have been reinvested in the fund on an annual basis making SRF self-sustainable. The fund has enabled the city to cut its energy consumption and utility costs.