Federal engineers have begun a $4.6 million dredging project in Hampton-Seabrook harbor.
Vessel owners in the state's largest fishing port say the emergency dredge is long overdue.
They say sandy shoals that have built up on the bottom of the harbor are creating navigational hazards and hurting their businesses.
Senator Jeanne Shaheen has advocated for the project. She filmed a video Monday near the dredge site.
"We're excited," Shaheen said over the drone of dredging equipment. "We hope that this harbor is going to be fully navigational by next spring."
Shaheen says the first area of dredging should be done by late this year.