Have no fear about the helicopter you may hear.
Residents in the Upton area may notice increased helicopter activity in the coming weeks as National Grid undertakes its twice-a-year helicopter inspection of more than 2,900 miles of high-voltage transmission lines in Massachusetts, Rhode Island, New Hampshire and Vermont, said National Grid in an announcement.
National Grid is conducting comprehensive flights that includes brief stops at transmission line structures to observe any abnormalities.
The color of the helicopters will primarily be blue and yellow and have the following tail numbers; N801JB, N800JB, N445JB, N219CT
“Spotting potential problems before they turn into service interruptions is an essential part of maintaining the safety and reliability of the transmission system that supplies power to National Grid’s 1.7 million New England electricity customers and other electric utility companies,” said Gerald Convery, National Grid’s Director of Electricity Transmission Inspections & Maintenance, in a release. “Particularly during the winter months when ice and high winds can impact our transmission equipment, we owe it to our customers to take pre-emptive measures to head off service interruptions whenever and wherever we can.”
The inspections are scheduled to take place between June 8, 2015 and mid august.
UPTON DAILY 
I’d love to see more detailed schedules if they had them. We live right on the power lines in Mendon and my son would love to see the helicopters 🙂