View GP&L Timeline with pictures: GP&L Through the Decades

April 1, 1923: C.E. Newman closes the switch on GP&L’s 117 kilowatt (KW) diesel generator, bringing service to 300 customers

1943: First interconnection with another utility, the Brazos Electric Power Cooperative

1957: Construction of C.E. Newman Power Plant Units #1 and #2 is completed

1964: Final expansion of the Newman Plant to five units; C.E. Newman retires with GP&L having grown to 15,000 customers

1967: Construction of Ray Olinger Power Plant Unit #1 is completed near Lavon Lake

1971: Olinger Plant Unit #2 is completed

1975: Olinger Plant Unit #3 is completed, with GP&L at 35,000 customers

1977: Garland becomes a partner in the Texas Municipal Power Agency (TMPA), created to construct a coal-fueled plant to eliminate dependence on natural gas as a boiler fuel

1983: TMPA’s 420 megawatt (MW) Gibbons Creek Steam Electric Station is completed

1993: GP&L purchases Farmer’s Electric Cooperative facilities within Garland city limits

2001: 75 MW combustion turbine generator (Unit #4) installed at Olinger Plant, with GP&L at 66,000 customers

2003: Spencer Power Plant in Denton purchased, adding as much as 166 MW of energy production

2014: GP&L completes two transmission lines to bring wind power from West Texas

2018: GP&L completes its portion of the Houston Import Project, a series of critical bulk power transmission lines for the Electric Reliability Council of Texas grid

2021: TMPA sells the Gibbons Creek Steam Electric Station

April 1, 2023: With more than 73,000 customers, GP&L is the fourth largest municipal utility in Texas and the 43^rd largest in the nation