Geotechnical report : Phase II study and evaluation of Tsaile Dam, Apache County, Arizona
Engineers Testing Laboratories, Inc.. 1981. Geotechnical report : Phase II study and evaluation of Tsaile Dam, Apache County, Arizona. Phoenix, Arizona
A Phase II study and evaluation was performed for Tsaile Dam to develop the most effective means of correcting the conditions causing the severe piping erosion observed at the downstream abutment contacts and of modifying the spillway and dam crest to pass the required flood event without overtopping. This study included the performance of ten test borings, undisturbed sampling, rock coring and water pressure testing in those test borings and laboratory testing of the samples recovered. The results of the field and laboratory work were utilized to develop specific recommendations for treatment of the abutment contact areas and to analyze the embankment stability. In addition, refined hydrologic and hydraulic analyses were performed to define the Probable Maximum Flood (PMF) and analyze various spillway and dam crest modifications for passing the 0.5 PMF without overtopping.