Standard&Poor's Ratings Services assigned its 'A+' rating to North Platte, Neb.'s 2015 sewer system revenue refunding bonds. The outlook is stable. The rating reflects our assessment of the system's: Generally stable customer base that serves North Platte; Rates we consider affordable; At least good financial performance; and Limited additional capital and debt needs. Offsetting these strengths are the city's below-average incomes and lack of comprehensive management policies, especially regarding long-term planning and liquidity policies. We note, however, that if additional policies were adopted, the rating would not necessarily improve unless we believed that the other credit factors were also consistent with a higher rating level. Net revenues of the sewer system secure the bonds. Bond proceeds will be