ACCORDING to the modelling, flood water won't even reach the bottom step of the Harris family's home at Pampas, once the Inland Rail's massive earth levy bank, which will run alongside their farm, is constructed.
The trouble is - as the photo of Ross and Bronte Harris's home clearly shows - the flood water comes up a good 50cm deeper than modelled, even before the Inland Rail's three-metre-high levy bank crossing the 16km Condamine River floodplain is built.
"The house was built at this height because when when the flood water reaches this height we know it will overtop the existing rail line," Mr Harris said.
"This photo shows the maximum height of flood water on the floodplain today. We know it, we live with and have designed our farm around it.
"How they can say the flood level will be at ground level when there will be a three-metre-high levy bank and culverts, which will certainly become blocked with stubble, is just incredible."
The Harrises say flawed flood modelling is just part of the ongoing frustration of dealing with the Australian Rail Track Corporation.
"They just refuse to acknowledge the evidence even when it is placed in front of them, let alone act on it," Mr Harris said.
"It's clear the people who are sent out to talk to us are very well trained not to react, no to show any change in emotion, just to push the ARTC line," Mr Harris said.
"Even when you ask them directly, they just say nothing rather than justify their modelling.
"It is incredibly frustrating. What confidence can we have when reality is ignored.
"You're just left shaking your head in wonder at the stupidity of it all."
The Senate committee reviewing the construction of the Inland Rail is scheduled to table its report at the end of September.
