Answer by
ahsanmahmoodawan (1169)
HCR files are hydro files used by HYDROcad an interactive CAD stromwater modelling program used for water drainage sloutions
programs that run HCR files are HYDROCAD software solution hydrocad or hydrocad software solution hydrocad sampler
i think this can help but don't play with hcr files if you don't know more about it or it will corrupt windows