S&P Global Ratings assigned its 'AA' long-term rating to the City of Marquette Building Authority, Mich.'s $1.035 million series 2018 limited-tax general obligation (GO) building authority bonds, and $4.49 million series 2018 limited-tax general obligation (GO) capital improvement bonds, reflecting the limited-tax GO pledge of the City of Marquette. S&P Global Ratings also affirmed its 'AA' long-term rating and underlying rating on the city's existing GO debt. The outlook on all ratings is stable. The 'AA' rating reflects the limited-tax GO pledge of Marquette. The city's existing and proposed limited-tax GO bonds are payable from ad valorem taxes levied on all taxable property, subject to statutory limitations. Despite the limitations, we rate the limited-tax GO debt at the same level