The Inkerman Water Supply Board was constituted in February 1917 to manage and repay the capital cost over 28 years, the anticipated life of the plant. Detailed survey work was undertaken and by the end of the year, 100 well sites had been tested, 70 selected, and a contract for the manufacture of reinforced concrete casing let to Hume Brothers of Melbourne, with production commencing in late 1918. The cost of the scheme escalated due to inflation after First World War. Shortages and strikes following the war delayed the construction of the central powerhouse, the cost of which had risen by 150 percent. The cost of well sinking had nearly quadrupled, and the number of transmission lines had doubled. In 1921 a fresh estimate put the cost of the scheme at . On 15 May 1922 Premier Ted Theodore performed the official opening, although the main turbine was not yet completed. The powerhouse provided electricity to the town of Home Hill (surveyed in 1911 to service the Inkerman Repurchased Estate and developed from ), and to a few Inkerman farmers for irrigation purposes with the rest waiting to be connected. The central powerhouse could not drive all the pumps at once, and to prevent overload, power was provided in rotation, whilst at night there was hardly any load on the system. Under the Irrigation Act of 1922 control passed to the Irrigation and Water Supply Commission, which found many discrepancies between the book values and actual worth of many of the assets. All the dead and abandoned wells were written off, and the value of the powerhouse building halved as it was considered that a less elaborate structure would have served as well. , 478 was wiped off the capital assets giving a net worth of . By mid 1923 nearly had been spent yet only were irrigated. Inevitably, the half-complete scheme lost money. Although wartime conditions had contributed, the Water Supply Department had to share the blame; there had been no proper supervision to control well-sinking costs, and operating costs were high with a large powerhouse running at night just to power lights in Home Hill.  1931 was so dry that the powerhouse worked 24 hours per day from March to June. Farmers were rostered to maintain an even demand day and night. The installation of meters at last ensured that water and power were not wasted. For the first time the operation made a profit of nearly after paying interest, its first contribution to paying off the capital cost. The Moore Government, which replaced the Labor administration in 1929, sold most of the State Enterprises, and accepted the Inkerman farmers proposal to take over the district's power supply and irrigation scheme.