A new report by the Marin County Civil Grand Jury evaluating how transparently the county’s public agencies provide access to information gave nearly all of West Marin’s 15 agencies failing grades—except for the Bolinas Community Public Utility district, which earned an “A+” mark. Jennifer Blackman, the district’s general manager, said a self-audit provided by the grand jury led the district to improve its website’s transparency. “You would have had to really search around for those…