Above: Construction of the cofferdam at the Belmont River Water Basin. Inset: Resident Engineer Kam Patel. Credit: Philadelphia Water

In the public imagination, drinking water infrastructure usually comes down to two things: the drinking water treatment plants, and water mains that deliver the finished product to your tap.

In reality, the infrastructure it takes to treat hundreds of millions of gallons of water per day and get that top-quality water to 1.5 million people is far more complex, involving a variety of facilities along the way.

During Infrastructure Week 2016, we’ve been looking at some important infrastructure projects—all of which are funded solely by your water bill—that might get overlooked.

One such project is the renovated Belmont Raw Water Basin, which is in its final stages after years of work.

To give you an idea of how long this basin has been helping to provide Philadelphia with drinking water from the Schuylkill River, consider that Theodore Roosevelt became president the year construction began.

Check out amazing historic photographs of the original construction site here: