War the engineering company Clayton and Shuttleworth required a 3.3 kV electricity supply from the municipal power station. However, as demand increased the corporation's station was unable to meet this demand. Clayton and Shuttleworth / Corporation power station, 1917–53 To meet its requirements for electricity for the war effort Clayton and Shuttleworth built a private supply power station (53°13'39"N 0°31'26"W) in Spa Road on the opposite side of the River Witham to its Titanic Works. The station contained: 4 × Babcock & Wilcox land-type boilers 3 × 750 kW the A.E.G. Company turbo-generators, 3,300 Volts, 50 Hz 1 × 2,000 kW the British Thomson-Houston Company turbo-generators, 3,300 Volts, 50 Hz. Coal was delivered via a railway siding off of the adjacent railway line. Spa Road power station, 1920–53 Lincoln Corporation took over the operation of the Clayton and Shuttleworth station in 1918/19. New plant was ordered and commissioned in 1921 and comprised: 4 × Marine type Babcock & Wilcox boilers, each with a capacity of 36,000 lb/hr (4.53 kg/s) 2 × 5,000 kW turbo-alternators, 6,600 Volts, 50 Hz. To allow for further expansion the Corporation purchased of land to allow for a projected total generating capacity of 40,000 to 50,000 kW to be built. The flow of the River Witham in summer was limited and was unable to meet the cooling water demand of the power station. Therefore, the new station was provided with a cooling pond east of the station building. The pond was square. By 1923 the generating plant comprised: 3 × 795 kW turbo-alternators 2 × 2,000 kW turbo-alternators 2 × 5,000 kW turbo-alternators. In 1923 the power station generated a total of 14.548 GWh; the total load on the system was 6,300 kW; and there was a connected load of 10,728 kW. The amount of electricity sold and the amount of revenue generated by the power station was as follows: The surplus of revenue over expenses was £41,367 for the Corporation of Lincoln. The Central Electricity Board (CEB) was established in 1926 to purchase electricity from the most efficient ‘selected’ power station across the country and to sell it to electricity undertakings. The CEB was also responsible for the construction of the National Grid, built in 1928–33. Lincoln was connected to the National Grid via a 132 kV substation east of the Spa Road site. In the early 1930s the engineering firm Ruston & Hornsby threatened