Combined Sewer Overflow (CSO) Wet Weather Disinfection

Project Summary and Scope

Installation of three Trojan® UV4000Plus UV reactors in the existing empty UV reactor channels in the WWTP Ultraviolet (UV) Disinfection Facility Building including installation of two new 2500 kVA 13.2kV – 480V transformers, 480V switchgear, electrical work, controls, instrumentation and other ancillary improvements. The project will also convert existing tanks for use as Primary Effluent Storage Tanks and replace the 96” diameter raw water venturi flowmeter.  This project is a requirement of the CSO Special Order by Consent between the City and the Virginia State Water Control Board.

“Information and documents authorizing, depicting or outlining details about the project, including, but not limited to, the following:

  1. CSO Special Order by Consent
  2. UDC Report to City Planning Commission
  3. CSO Grant Agreement with Virginia Resources Authority.
  4. Executed contracts with all contract documents, including contract modifications that make changes to, extend, or renew the contract.
  5. Procurement Bid Documents


Project Milestones

Construction Start - October 2017

Construction Completion - February 2021

Project Funding

DPU Wastewater CIP - $15,900,000 ($14,197,310 to be reimbursed by Virginia CSO Matching Fund Grant)

Project Status Updates

Work was fully completed in March 2021. The city is currently overseeing a warranty period.

Permit, information is listed below. For details please call the Department of Planning, Development and Review at 804-646-4169.

City Planning Commission Approval - March 2016

City Building Permit approved 2017

DEQ for Certificate to Construct approved 2017

Certificate to operate pending review as of April 2021

Expenses (costs are reported quarterly)

RAPIDS Project # 102099

Total expenditures as of 4/6/2020:  $15,900,000

Project Contact Information, if you have questions about this project please contact this individual.

For information about the details of any project first contact the public information office for the department running the project.  For most projects the following people can help:

Performance Measures and Benchmarks

Full mechanical and performance testing of the system was completed prior to project acceptance. A warranty period of 6-12 months will be observed on all aspects of the work.

Project Overall Status (Active, Pending or Complete)


Ordinance Information

Authorized through adoption of City Capital Improvement Program, Wastewater Utility.

Contract Information

Procurement Documents (although drawings and details about the design will be available from the Procurement office, these documents should be considered as protected by the Homeland Security exception and should not be shared unconditionally with the public.  Anyone requesting access to these documents should complete and sign a FOIA request form with DPU).

Click here to leave Feedback