A well in front of the family building of the Agricultural Bank of China, which has no property street management building for nearly 30 years, is blocked almost every year. Which department should I

A well in front of the family building of the Agricultural Bank of China, which has no property street management building for nearly 30 years, is blocked almost every year. Which department should I find to solve it? The right to use this well belongs to all the owners of the family building. I think it is reasonable for owners to maintain collectively based on the principle of "user pays". This well should be cleaned several times a year, otherwise it will be blocked. If the municipal pipe is blocked and the well of the family building cannot be discharged, the municipal government will be responsible.