The free event was an effort to make the public more aware of the area's waste water utility.
The event featured tents set up with water conservation and public works projects for all ages.
Some of the major projects that were featured included stream separation projects and ultra violet disinfection, a new technology that disinfects the waste water that goes back into the river.
"So it's underneath all our feet all the time. It is running 24-7, 365 days a year, turning out cleaner water then it took in," said Environmental Services Supervisor Sean Deweese.
"I think it's really good that they did all of this because it helps people have more awareness, but also letting them have fun at the same time," said Boy Scout Colby Jeffers.
If you would like to know more about the projects, click here.