We are affirming our ratings, including our 'A-' long-term corporate credit rating, on AltaLink L.P. The ratings reflect our opinion of the company's excellent business risk profile and significant financial risk profile. The stable outlook reflects our expectation of regulatory support and timely and significant equity injections from AILP's ultimate sponsors to maintain the capital structure of both entities. On Nov. 22, 2010, Standard&Poor's Ratings Services affirmed its ratings, including its 'A-' long-term corporate credit rating, on Alberta-based AltaLink L.P. The outlook is stable. The ratings on AltaLink reflect Standard&Poor's opinion of the company's excellent business risk profile (we categorize business risk profiles from 'excellent' to 'vulnerable') and significant financial risk profile (we rank financial risk