Gilgel-Gibe I Dam is located in Sekoru woreda Jima zone of Oromia region. It isrnembankment asphalt faced rock fill dam. Although dams are constructed with greatrnattention to carefully survey, design, and construction such as Gouhou dam in China,rnBaldwin Hills Dam in Los Angeles, Teton Dam in USBR have been failed and resultrnserious accidents in the world. This study is intended to devise a methodology forrnembankment dam safety monitoring through seepage analysis of Gilgel-Gibe I Dam.rnSeepage was numerically performed using 2-D FEM steady state analysis to investigaternthe seepage in the dam body. Trial seepages were produced for different reservoirrnwater level and trial hydraulic conductivity assigned to asphalt face. The trial seepagesrngenerated from seep/w software of Geo-studio 2012 package, and measured (recorded)rnseepage data are an input to linear regressions. Then, the LR coefficients wererncalculated by optimizing the seep/w results with the measured seepages usingrnMATHLAB model. The calculated seepage concides with the measured seepage withrnRMSE, Mean error , mean absolute error being closer to zero while the rï¿½ï¿½ value beingrnaproximately one. By combining these calibrated LR coefficient and seep/w seepagernresult predicted seepage is developed. From this by adding and subtracting RMSE,rnupper and lower limit is developed. The upper limit is checked against piping and slopernstability. It is the critical value beyond which cause piping, instability and disaster. Therncurve obtained can be used to monitor the dam safety against seepage for futurernoperation.rnKey words: Dam safety monitoring; Gilgel Gibe I dam, linear regression, SEEP/W