NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned an 'A' rating to the following Riviera Beach, FL (the city) bonds: --$57.17 million taxable public improvement revenue bonds, series 2015. The bonds are expected to sell July 28 via a negotiated sale. Proceeds will fund a portion of the unfunded actuarial accrued liability (UAAL) of the city's three pension plans. In addition, Fitch affirms the following ratings: --$22 million outstanding public improvement bonds at 'A'; --Implied unlimited