The relationship between temperature and earth pressure acting on a Rigidly Framed Earth Retaining Structure (RFERS) subject to wide temperature variation was explored in this chapter. The open concrete garage RFERS presented in Chapter 4 was instrumented and monitored for a period of four and a half years. The structure retains 11 m (36 ft) of soil on one side only. The measured displacements were used to calculate the earth pressure coefficient using closed form equations that were developed in Chapter 3. The data indicated that the coefficient of earth pressure behind the monitored RFERS had a strong linear correlation with temperature. The study also reveals that thermal cycles, rather than lateral earth pressure, caused some of the structural elements to fail.