Sorry Bigtime, you said the runways were 'pretty bloody busy', and I read it as 'pretty bloody lousy'.
And mykalberta, YYC's 34/16 is over 12500' long, one of the longer runways in North America, so I can't imagine why it would be limiting for cargo flights. While Calgary is relatively high in altitude, we don't get many really high temperatures. Altitude and temperature are the primary factors in performance.