The Koh Norea cable-stayed bridge, which connects the islands of Koh Pich and Koh Norea, is considered as one of Cambodia's most significant projects. The main bridge is an extrados cable-stayed bridge with two tall pylons. The pylon is supported by eighteen 2.0m diameter, 62.60m long drilled piles that are rock socketed into coal measure sandstone. Large diameter super-long bored piles typically have a high bearing capacity. The self-balanced method is a new type of static load test method that is suitable for the test since the Koh Norea Bridge is a river cross bridge that passes across the Bassac River at its estuary to the Mekong. This paper describes the geology and ground conditions at the bridge side, the rationale for foundation length selection, and a detailed report of a successful Bi-directional static load test procedure utilizing the Osterberg Cell Test technique on the bored pile (drilled shaft) foundation work for the Koh Norea Bridge in the Bassac River, Cambodia. A bi-directional static load test pile known as P3- 18 was done. The main objective of this load test was to load the test pile to its designed ultimate bearing capacity of 33,000kN, which is double the safe working load of 16,500kN. The maximum pile end bearing capacity as well as the maximum frictional resistance of the pile shaft will be tested. The interpretation of the data allowed an approximated prediction of the test pile's behavior and confirmed the designed bearing capacity for the working piles. Based on the test results and analysis, the ultimate bearing capacity of test pile P3-18 is 33,110kN.