EM-Johnson-Basins

E.M. Johnson Water Treatment Plant Basins 1 - 4 Modifications

Flocculation and Sedimentation Basin Upgrades

The project will modify and replace aging infrastructure as well as upgrade and expand the water treatment process facilities associated with rapid mixing, flocculation, and sedimentation at the City of Raleigh's E.M. Johnson Water Treatment Plant. A full scale pilot of the proposed process and infrastructure modifications was previously completed in March 2020 for one of the treatment basins. The proposed project extends these modifications to the remaining four treatment basins.

Project Details

 
Type:
Water and Sewer
Budget:
$46,500,000
Project Lead:
Raleigh Water

Contact

 

Edward Stempien, PE
Senior Project Administrator
Phone: 919-996-3490 
Office Location: 1 Exchange Plaza Suite 620
Raleigh, NC 27601 

Lead Department:
Water

Subscribe

 

Planning

This phase is complete.

Lead Department:
Water

Design

This phase is complete.

Lead Department:
Water

Construction

Construction will begin Winter 2021.

Flocculation and Sedimentation Basin modifications are currently scheduled to be completed as follows:

Basin 4 Completion Date: April 2023
Basin 3 Completion Date: June 2024
Basin 2 Completion Date: September 2025
Basin 1 Completion Date: December 2026

Lead Department:
Water

Complete

Check back for future phase details. 

Lead Department:
Water

History

The City of Raleigh’s E.M. Johnson Water Treatment Plant was originally constructed in 1965 with a capacity of 25 million gallons per day. The plant has undergone several upgrades and currently has a permitted capacity of 86 million gallons per day. The E.M. Johnson Water Treatment Plant receives water from Falls Lake Reservoir, which inbounds water from the Neuse River. Raw water is conveyed to the plant site and stored in two 70 million-gallon terminal reservoirs. Raw water flows by gravity from the terminal reservoirs through rapid mixing, flocculation, and sedimentation processes prior to ozonation, filtration, and disinfection. The proposed upgrades to rapid mixing, flocculation, and sedimentation will expand treatment capacity of these three processes and pave the way for a future plant treatment capacity of 120 million gallons per day.

Schedule

Date Activity
Spring 2021 Project Design Complete
Fall 2021 Permitting Complete
N/A Easement Acquisition Complete
Spring 2021 Project Bid Complete
Winter 2021 Project Construction Begins
Winter 2026 Project Construction Complete