Design-Build for New Versus Retrofitting Water Treatment Plants

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CONTENT EXPIRES: December 31, 2023

Design-build is gaining traction and becoming an increasingly popular delivery method for water infrastructure projects. Whereas the design-build advantages historically focused on greenfield projects, this delivery method can also be extremely beneficial for retrofits of existing facilities. This presentation will explore the merits of design-build for water treatment plants and will highlight two Indiana American Water treatment plant projects, one retrofit and one greenfield, that demonstrate the advantages of the delivery method and highlight customized approaches to meet the owner and project needs.


1. Demonstrate the advantages of design-build for greenfield projects and less conventional retrofit projects. 

2. Compare the design-build benefits for greenfield and retrofit projects. 

3. Explore the challenges with retrofit projects and how a design build team can work through the challenges collaboratively. 

4. Assess complications for project closeout amidst COIVD.

Timothy Glessner, P.E., DBIA

Principal Project Engineer

Gannett Fleming

Mr. Glessner is a Principal Project Engineer and technical lead of the Water Design Group in Gannett Fleming's home office in Camp Hill, PA.  Tim has over 30 years experience in design and construction of water treatment plants using a wide variety of processes including high rate clarification, membrane filtration, and UV.  Mr. Glessner has worked on projects using both conventional and alternative delivery methods.

Roy Francis

Senior Project Engineer

Indiana-American Water Company

Roy is a Senior Project Engineer with Indiana American Water. He has been responsible for managing capital projects of differing variety, including wells, pump stations, water storage tanks, treatment facility improvements, and new treatment facility construction. He has completed five major projects using progressive design-build.

Trisha Graves, P.E.

Project Engineer

Gannett Fleming

Trisha Graves is a Project Engineer with Gannett Fleming. She has 11 years experience in the water/wastewater industry, principally focused on the design of water treatment plants. Over the past several years, she has served as Project Manager and/or Lead Civil/Process Designer on design-build water treatment plant projects. She has a Bachelor’s degree from Pennsylvania State University and a Master’s degree from Villanova University and is a professional engineer in the State of Pennsylvania.


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1.00 CEU credit  |  Certificate available
1.00 CEU credit  |  Certificate available