It's the first step toward a healthier and safer Jordan Creek.
Crews have started work to remove nine dams along the creek.
Crews removed part of the dam so they can lower the water level of the creek and complete the work.
Organizers of the project hope removing the barrier will not only create cleaner water but help save lives.
With just a little bit of work, water flow in the Jordan Creek is a lot different.
"By removing the dam, we are bringing it to a natural state of a lot of channels, a lot of diversity, a lot more life in the stream," said Kristie Fach of the Wildlands Conservancy.
Wildlands Conservancy is heading up the project.
This is the first of nine dams that will be removed from Jordan Creek.
Behind each barrier you can see a lot of silt and no movement.
"We've had a lot of support from the city as well as other municipalities and a lot of funding. We're very proud of this project," said Fach.
It will cost $451,000 to remove the nine dams.
All of the money was donated and the residents of Allentown will benefit from the move.
"This eliminates a safety hazard. The Jordan Dam unlike many others has a series of tubes running underneath it. Those tubes have resulted in several near drownings and a drowning," said Allentown Parks and Recreation director John Mikowychok.
"There's still going to be a lot of fishing opportunities because we are improving the stream health and we're also installing some fish habitat structures.
Organizers say it will take 30 days to fully remove the dam.
They are working out a schedule on removing the other eight dams.