Prairie Value is the value assuming that not only is the subject land vacant but also, so is the surrounding infrastructure. However, this is the wrong approach as only the subject site is considered as being vacant so that all external services such as roads, electricity, water, and sewerage are "as is" and available to the land - McGeoch v Fed Comm (1929) 43 CLR 277; Tetzner v CSR (1956) 14The Valuer 477 [1958])50; Comm of Rail v VG (1962) 10 LGRA 20; 16The Valuer 512.