Water main flushing is performed, weather permitting, twice each year - in the spring and the fall.
Why We Flush Mains
Flushing of the Jamestown water distribution system accomplishes several things: 
- By systematically opening hydrants and allowing the water to run full force, the utility flushes out minerals, sediment and corrosion products that have settled in the mains.
- Flushing mains serves as an opportunity for the operators to perform valve and hydrant inspections for optimal fire protection.
- This process allows the utility to achieve greater flows through its mains.