The Garw and Ogmore Gas Co new gasworks opened at Pwllandras/ Brynmenin in 1913 and supplied Ogmore and Pontycymmer. In 1914 the annual gas production figures 30m cu.ft. from 2,673 tons of coal. The customers were primarily on slot meters (2,659) as opposed ordinary meters (410), they supplied 202 (incandescent) public gas lamps and operated 32 miles of mains. Sulphate made. Three gasholders (one large one at the new works and two at the old works site), capacities 12,000 cu.ft., 48,000 cu.ft. and 120,000 cu.ft. capacity. Wm. Johnson was the Chairman and S. Murray, the Engineer, Manager & Secretary. In May 1938 the Bridgend Gas undertaking stopped production in favour of a coke oven gas from Tondu coke oven via the Garw & Ogmore Company, who were supplied by the coke ovens. In 1949 the Garw & Ogmore Company were producing 6m cu.ft. plus purchasing 148m cu.ft. of coke oven gas, much of which was sold on to Bridgend. S. Murray was the Engineer, Manager & Secretary. In 1952 the “Gas World Year Book”, recorded that the Garw and Ogmore undertaking whose address was Aberkenfig was purchasing 171 m cu.ft. of coke oven gas and although not manufacturing, it was still listed as having horizontal retort plant. C.C. Evans was the Engineer, Manager and Secretary. These gasworks belonged to the Garw and Ogmore Gas Undertaking, whose records are held at the Glamorgan Archives. The gasworks were visible on the OS maps from 1914 to 1972 OS maps.