A commercial plaza has a stormwater management pond with an overflow weir. During a heavy rainfall event, a plumber observes that the weir is flowing but the water level in the pond is significantly higher than usual and the surrounding drains are backed up. An inspection reveals a partially submerged outflow pipe from the pond. What immediate action should the plumber consider?

Question: A commercial plaza has a stormwater management pond with an overflow weir. During a heavy rainfall event, a plumber observes that the weir is flowing but the water level in the pond is significantly higher than usual and the surrounding drains are backed up. An inspection reveals a partially submerged outflow pipe from the pond. What immediate action should the plumber consider?

Answer options:

• Increase the outflow pipe diameter. ✅ Inspect and clear any debris or obstructions from the outflow pipe and weir.
• Divert excess water directly to the municipal sanitary sewer.
• Notify the city to increase the capacity of the downstream municipal storm sewer.

Correct answer: Inspect and clear any debris or obstructions from the outflow pipe and weir.

Explanation: The most immediate and practical action for a plumber observing a high water level and overflowing weir in a stormwater pond is to inspect and clear any blockages in the outflow pipe or weir itself, as accumulated debris is a common cause of reduced flow. Increasing pipe diameter or diverting to sanitary sewers are not appropriate immediate actions.