Digester Complex Upgrades

Construction Year: 2019
Project Budget:
Funding Source:
2013 Sewer Bond; partially
Year Completed:

Project Description: 
 Phase 2 of the Columbia Regional Wastewater Treatment Plant (CRWWTP) Improvements will enhance the operation and capacity of the existing digester complex. Black & Veatch was retained in June 2018 to perform detailed assessments of the existing digester facilities that are in need of upgrades and rehabilitation. Based on these assessments and discussions with City staff, Black & Veatch has compiled a preliminary basis of design memorandum for the project identifying the selected improvements for implementation and the associated costs. Black & Veatch will provide final design and construction plans for the selected improvements to the digester complex. The preliminary design includes using Vertical Linear Motion as the mixing system and replacing covers or roofs on the three primary digesters, then further evaluating the roof of the secondary digester for rehabilitation. Proposed work will include replacing the roof of the Digester Complex, upgrading controls and piping, rehabilitating brick work and other miscellaneous items.

Project Status:  Phase 2 construction to begin 2019

Project Manager: Erin Keys, P.E.

Construction by:River City Construction LLC – Construction Manager at Risk

Interested Parties Meetings: Sept. 27, 2018

Public Hearing:  November 5, 2018;  opens in a new windowView Memo


opens in a new windowLocation Map

opens in a new windowLocation diagram of WWTP