Is participation in the cost of a water pump in a village considered an ongoing charity (Sadaqah Jariyah) for a deceased mother, and does this charity continue if the pump ceases to function?

Purchasing a pump (bomb) that raises water to tanks and endowing it with the intention of reward for one's parents or one of them is considered an ongoing charity (Sadaqah Jariyah) as long as it functions. If it breaks down, the charity ceases.