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为加快山区经济建设步伐，广东省在粤北韶关市评石至乳源县之间修建一条坪乳公路，它的建成将使坪石至广州的路程缩短60多公里。而白桥坑大桥就是在坪桥公路上乳源瑶族自治县境内的第三座单箱型拱桥，桥全长163米，桥底深有73米，工期为6个月。1996年12月20日上午9时，白桥坑大
To speed up the pace of economic construction in mountainous areas, Guangdong Province has built a Ping-Milk Highway between Pingshi and Ruyuan County in Shaoguan City, northern Guangdong Province. Its completion will shorten the total length of the Pingshi-Guangzhou route by more than 60 kilometers. The White Bridge pit bridge is on the Pingqiao Road Ruyuan Yao Autonomous County in the territory of the third single-box arch bridge, a total length of 163 meters, 73 meters deep bridge bottom, the construction period of 6 months. At 9:00 on December 20, 1996, white bridge pit