Skip to main content
Start of main content

City of Atlanta Water Supply Program

Providing water sustainability for the next 100 years

  • 500'

    Deep

  • 5

    Miles

  • 10'

    Diameter

  • Atlanta, Georgia

    Atlanta, Georgia

Moving raw water from the Chattahoochee River to two water treatment plants and storage facilities

Stantec is designing and providing construction administration for the underground aspects of the City of Atlanta's top priority infrastructure project—the Raw Water Supply Program. Current infrastructure includes components dating back to the 1890s, with critical portions well beyond their design life. The new system moves raw water from the Chattahoochee River to a quarry and the Hemphill and Chattahoochee water treatment plants providing water sustainability for over 100 years.

The project consists of 5 miles of 10-foot inside diameter tunnel in hard and abrasive Gneiss bedrock, a 2.4-billion-gallon quarry for raw water storage (one of the largest in the world), 10 shafts, raw water intake, pump station retrofit, and three new pump stations. The tunnel varies in depth from 250 feet to over 500 feet. The project is being delivered via a CM@Risk contract, making it the longest such tunnel ever built in North America.

Challenges include mining near the river and under the City's only active raw water reservoir, the Brevard Fault system, inability to shutdown treatment facilities, and construction near residences. To enhance project completion, we adopted an aggressive design schedule that includes multiple parallel activities, daily reporting of subsurface investigation results, geologic mapping of shaft and tunnel construction, and tunnel lining selection as mining progresses.

We are using the Envision rating system to incorporate sustainable design practices throughout the project.

At a Glance

Offices
Article
On A Grand Scale
Meet Our Team

Anil Dean, Tunnels and Trenchless Practice Leader

The interaction of value, project needs, and the ground makes for great variety and no two projects are ever the same.
Anil Dean Tunnels and Trenchless Practice Leader Read More

Don Del Nero, Vice President, Sector Leader, Tunnels & New Trenchless

From transit tunnels to water and sewer tunnels, my career improves the quality of life for millions of people in major metropolitan centers.
Don Del Nero Vice President, Sector Leader, Tunnels & New Trenchless Read More

Eric Dunford, Team Lead, Sustainable Development

True sustainable design comes from understanding and respecting the needs and values of stakeholders. Context is paramount.
Eric Dunford Team Lead, Sustainable Development Read More

Marty Janowitz, Vice President, Practice Leader Sustainable Development

Nature is the best design model. Vibrant communities, organizations, and ecosystems are diverse, resilient, interconnected, and inherently innovative.
Marty Janowitz Vice President, Practice Leader Sustainable Development Read More

John Take, Senior Vice President, Business Leader, Water

Protecting entire cities from flooding or helping industries keep their processes running—for me, it’s all about moving water.
John Take Senior Vice President, Business Leader, Water Read More
  • Anil Dean

    Tunnels and Trenchless Practice Leader

  • Don Del Nero

    Vice President, Sector Leader, Tunnels & New Trenchless

  • Eric Dunford

    Team Lead, Sustainable Development

  • Marty Janowitz

    Vice President, Practice Leader Sustainable Development

  • John Take

    Senior Vice President, Business Leader, Water

We're better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

    Contact Us
  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

    Join the Team
End of main content To top