《明史·列传·卷二百》
二十四年，曹震到泸州巡察，看到有支流通往永宁，便凿去石头、削平崖壁、疏通河道以通漕运。
二十四年，震至泸州按视，有枝河通永宁，乃凿石削崖，以通漕运。
In the twenty-fourth year, Cao Zhen inspected the prefecture of Luzhou and saw that there was a branch leading to Yongning, so he cut away the stones, leveled the cliffs, and dredged the waterway so that it could be used for transportation.