SAN FRANCISCO--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AA-' rating to the $250 million Allina Health System taxable series 2015 bonds. In addition, Fitch has affirmed the 'AA-' on Allina Health System's (Allina) outstanding debt, listed at the end of this press release. The series 2015 bonds will be fixed rate and expected to price the week of Sept. 7th. The bond proceeds will fund $150 million of capital expenditures and $100 million will remain on the balance sheet for general corpora