Chinook Roads Partnership is a special purpose vehicle that entered into a project agreement (financial close of March 30, 2010) to design, build, finance, maintain, and operate the Southeast Stoney Trail in Calgary, Alta. The new infrastructure consists of 25 kilometers of a six-lane divided freeway, plus additional basic and auxiliary lanes, and includes nine interchanges, three flyovers, and additional pregrading for future interchanges. In addition, Chinook will operate and maintain, but not rehabilitate, certain segments of the existing highway. The 'A' rating on Chinook Roads Partnership's C$156.7 million senior secured bond due March 31, 2043, broadly reflects Standard&Poor's Ratings Services' assessment of the following positive factors: A strong rationale for the project, as the new infrastructure will