Frustration is mounting in Calgary as residents grapple with what is likely to be another protracted water crisis after a second catastrophic rupture of one of the city’s two main pipes that transport drinking water.Disbelief and some choice words first came to mind for Kellie Freeman on Tuesday night when she first heard that the Bearspaw South Feeder Main – described by the city’s mayor as the “beating heart of our water system” – had burst, sending water pouring onto the Trans-Canada Highway.