North Water Reclamation Plant Expansion
What is the purpose of this project?
Parker Water and Sanitation District (PWSD) currently operates two water reclamation (wastewater treatment) facilities:
- The South Water Reclamation Facility (SWRF) was constructed in 1988 and has undergone a number of subsequent improvements during the following three decades.
- The North Water Reclamation Facility (NWRF) was placed into service in 2004 and has not seen any significant improvement projects since its original construction.
The SWRF is currently operating at a level (2 million gallons per day) that is above its originally intended usage levels. To address this issue, PWSD plans to continue SWRF operations while offloading a portion to a new interceptor (the Cherry Creek Interceptor) that will divert a portion of the SWRF flows and loads to the NWRF.
In order to accommodate existing and future flows from the SWRF collection system, the NWRF is being built out to expand capacity. The NWRF is being expanded to include the following: expansion of headworks, addition of primary clarification, advanced water treatment (AWT) equalization and pumping, conversion to ultraviolet disinfection, conversion of existing aerobic digestors to Autothermal Thermophilic Aerobic Digestion, and the expansion of dewatering facilities.
Our long-term plans for the SWRF are to be determined. Once the NWRF expansion and Interceptor are complete, we plan to limit its usage to 1mgd for the foreseeable future. We are working on a treatment master plan study with HDR to see if we can do something to make the system more reliable and redundant, while making SWRF plant more robust and capable of meeting future discharge permits.
What is the timeline for this project?
This project began in Aug. 2019 and it will be complete in Spring 2022.
What is the budget for this? Will it affect my rates?
The budget for this project is currently $56 million. While all projects completed by PWSD have an indirect impact on rates, the costs for this project do not have a direct impact on customer rates as the project was built into our long-term plan along with many other necessary projects and costs.
Will there be any negative impacts to our community?
While all of the construction is occurring on PWSD's property, our neighbors will be impacted by construction noise and vehicle traffic. We have sent a letter to our neighbors alerting them to what’s happening and what to expect. Construction will be limited to after 7am on weekdays except for rare occasions, in which case we will request a variance from the Town of Parker.
Who are your partners on this project?
We are working with Jacobs Engineering and Garney Construction on this project.
Are you using any new or innovative technologies?
There are a number of new technologies that we are installing as part of this project. They include:
A new primary clarifier is being installed will help remove solids before they go the aeration basin, which will save us the cost of having to build a second aeration basin.
We are also changing our disinfection from chlorine to UV, which will lead to less chemical usage. UV is a well-known technology that requires less work to meet discharge requirements.
Additionally, we’re changing the digesters we use from aerobic to ATAD, which will reduce the number of solids we produce. Currently we produce Class B biosolids which have to be disposed in a landfill, but in the future we will produce Class A biosolids which may be used in other ways such as agricultural fertilizer. ATAD will decrease the amount of biosolids we produce, which will decrease our hauling costs as well.