Starting next month, people in Anacortes can get something unusual in their drinking water: the internet.

An hour north, the seaside town of Anacortes has found a way to avoid all that disruption: fiber optics cables in existing water pipes.

A normally busy sidewalk on Seattle’s University Way Northeast has been cordoned off for an all-too-common reason: the concrete is being torn up to put in new fiber optic cable.

“We have inserted a fiber optics cable inside of live water lines all the way from Mount Vernon to Anacortes," said Fred Buckenmeyer, who runs the city's public works department. "First in North America.”

Buckenmeyer said this internet tube is made of the same plastic as the water pipe it sits inside.

“Like having a water pipe inside a water pipe,” he said. “No chance of contamination or anything like that.”

Buckenmeyer said the utility had lots of leftover capacity after installing a fiber-optic system for monitoring the various pumping stations along its water system. He said this novel approach cost less than the alternative: digging under the Skagit River, the Swinomish Slough and 15 miles of farms, wetlands, streets and sidewalks along the way.

City officials say they hope to entice customers away from Comcast with locally owned and cheaper internet service.

Project manager Jim Lemberg said if municipal broadband can capture a third of the Anacortes market for internet service, the project will pay for itself in 15 years.