S&P Global Ratings assigned its 'AA-' long-term rating to West Contra Costa Unified School District (USD), Calif.'s 2020 general obligation (GO) refunding bonds. At the same time, S&P Global Ratings affirmed its 'AA-' long-term rating and underlying rating (SPUR) on the district's existing GO bonds. The outlook is negative. Revenue from unlimited ad valorem taxes levied on property within the district secures the district's GO bonds. The Contra Costa County Board of Supervisors has the power and obligation to levy these taxes at the district's request for the bonds' repayment. The 2020 bonds will be issued in the par amount of approximately $231.8 million and will refinance the district's series 2010A, 2010B, 2011, 2012, and 2012A GO bonds outstanding for
