The San Diego County Water Authority is preparing to launch a major project to fix a leak in Pipeline 4 in the Moosa Canyon area of Bonsall. Pipeline 4 is a 90- inch diameter pipeline that provides treated drinking water throughout San Diego County, including the Vallecitos Water District (VWD). The leak site is in a remote area with no adjacent homes or business. Pipeline 4 will be shut down for up to 10 days. The shutdown likely will start on September 9, 2019, however, these dates may be adjusted depending on the severity of the pipeline leak or dangerous weather conditions, such as Santa Ana winds or Red Flag warnings.