Yellow River WRF Improvements

Total plant bypass to maintain operation during construction.

Water Reclamation Facility
Lilburn, GA
Delivery Method
CM at-Risk
Gwinnett County, GA
Year Complete

Project Overview

This $238.3 million award-winning project allowed Gwinnett County to divert, consolidate and treat flow from six aging wastewater treatment plants to this one facility. Originally constructed in 1979, the project required the complete replacement of the existing wastewater treatment process and a capacity expansion from 14.5 mgd to 22 mgd to meet the project’s objective of dramatically improving effluent quality and operational efficiency.

Work included a new preliminary treatment building, influent pump station, primary clarifiers, two 20-million-gallon equalization tanks, fine screen/lime facility, biological reactor basins, GE Zenon membrane filtration facility, UV disinfection facility, plant odor-control and chemical feed systems, sludge pump station and operations building.

Using construction management at-risk to execute and manage the complex project resulted in delivery six months ahead of schedule and more than $10 million under budget.


  • ASCE Georgia Outstanding Civil Engineering Achievement Award
  • CMAA Construction Management Project Achievement Award
  • ENR Best of the Best Award
  • ENR Best Project Award
  • GAWP Platinum Award
  • NACWA Platinum Peak Performance Award
  • Water & Wastes Digest Top Water and Wastewater Project
  • WEF George W. Burke Jr. Facility Safety Award
  • LEED Gold Operations Building


Total Gallon Equalization Tanks


Contract Savings Using CMAR Delivery


Contract Value Self-Performed by PC