With more than 30 years of service in Kentucky and Tennessee, CH2M HILL provides highly-effective, innovative, sustainable solutions — helping improve efficiency, safety and quality of life for the residents of the Kentucky and Tennessee region. With more than 210 staff in our 4 regional offices, we deliver a range of projects from very small to large and complex. We are looking forward to participating in the 2013 Kentucky/Tennessee Water Professionals Conference, sharing our knowledge and enjoying the plethora of great people and topics present at the conference. We consider this an opportunity to not only discuss the latest water issues facing our region, but also to better get to know our clients to understand their needs, issues, and overall objectives. We look forward to seeing those of you attending in Louisville, KY!
CH2M HILL Technical Presentations: Tuesday, July 16
Get a printable version of CH2M HILL’s presentations and presence at the KY/TN Water Professionals Conference.
First Year Operations of Advanced Treatment Facilities at the Northern Kentucky Water District
9:15 AM | Water Treatment – Session T3A
CH2M HILL’s Nick Winnike, with co-presenters Mary Carol Wagner from the Northern Kentucky Water District and Brent Tippey from HDR
The Northern Kentucky Water District constructed Advanced Treatment (AT) facilities at its Memorial Parkway (MPTP) and Fort Thomas (FTTP) water treatment plants with completion in mid 2012. Designed and constructed specifically to comply with the Disinfectant/Disinfection By-Products Rule, and to provide an additional
disinfection barrier, the AT facilities include post-filtration granular activated carbon contactors followed by ultraviolet light disinfection. The initial capacity of the MPTP AT project is 10 MGD, but is easily expandable to 20 MGD. The MPTP facilities went on-line in March 2012. The capacity of the FTTP AT project is 44 MGD and the facilities on-line in July 2012.
The presenters will discuss system performance during the first year of operations including water quality data with respect to both regulatory requirements and taste and odor reduction when an MIB and geosmin episode occurred. Operations observations will be shared concerning contactor backwash cycles with respect to frequency of backwash and chlorine concentration in the feed water to the contactors. Finally a cycle of carbon regeneration will have been completed and observations will be presented on alternatives available for regeneration along with successes and challenges with the regeneration process.
Real Time Control–Taking it to the Next Level
11:30 AM | Collection Systems – Session T1B
CH2M HILL’s Gary Swanson with co-presenter John Loechle from Louisville MSD
Louisville and Jefferson County Metropolitan Sewer District is responsible for stormwater and sanitary sewer service in the Louisville, Kentucky Metropolitan area. In response to a Federal Consent Decree, MSD developed an Integrated Overflow Abatement Plan to control sanitary sewer overflows and combined sewer overflows. The IOAP approach builds on MSD’s existing Real Time Control system which currently controls in-line and off-line storage at six locations throughout MSD’s combined sewer area. In FY 2012 the RTC system reduced CSO volume by over 1 billion gallons, mainly by storing combined sewage in existing large interceptors, then routing the flow to the Morris Forman Water Quality Treatment Center following the rain event.
Given the success of the existing RTC system, MSD plans to add 16 additional control points during implementation of the IOAP, expanding the use of the RTC system into the separate sanitary sewers tributary to the Morris Forman plant. The new control points will include additional in-line storage, off-line storage, flow diversions, and a remote high-rate treatment system. In addition to controlling the filling of storage basins, the RTC system will be expected to route flow through several potential flow paths, determine loadings on two separate treatment facilities, prioritize the emptying of in-line and off-line storage, and control the rate of emptying to match the treatment capacity available at the Morris Forman plant or at the new high-rate treatment system.
This presentation will review the status of the existing RTC system and track its effectiveness at reducing CSOs since initial implementation in 2005 and first expansion in 2009. In addition to performance statistics, a summary of “lessons learned” for further development of the system will be presented.
Avoiding the Rehab Rut
3:45 PM | Collection Systems – Session T1D
CH2M HILL’s Robert Cook with co-presenters Dwayne Frye and Sharon Deane from the Knoxville Utilities Board
As part of the PACE 10 Program, the Knoxville Utilities Board (KUB) continues to diligently mitigate sanitary sewer overflows (SSOs) within its sewer collection system. In the current era of sewer consent decrees and annual rehabilitation programs, it is easy to fall into the “rehab rut” by defaulting to trenchless rehabilitation technologies to mitigate known SSOs. All too often, however, rehabilitation efforts alone will not mitigate the SSOs because of underlying system characteristics. Such was the case with Mini-basins 08B3 and 24B1. In evaluating the basin and reviewing the maintenance history, several “red flags” directed the team to conduct a more detailed analysis of each basin, which revealed multiple SSO factors that would not have been addressed with trenchless rehabilitation technologies alone.
The in-depth analysis included a review of existing sanitary sewer evaluation survey data including flow monitoring, maintenance histories, previous rehab efforts, and the results of a hydraulic analysis of the basins’ mainline collector pipe. In both mini-basins 08B3 and 24B1, the existing 8-inch mainline sewer proved to be undersized; therefore, requiring the mainline to be upsized to an appropriate diameter slope. Severe sags were identified downstream of the SSOs and determined to also be contributing to the SSOs. The conference presentation will detail the “red flags” that guided the project team to performing a more detailed analysis and the underlying basin characteristics which required downstream capacity improvements in conjunction with trenchless rehabilitation.
Working in Maryville, Tennessee
CH2M HILL is assisting the City of Maryville with development of Local Limits as required by the City’s NPDES permit and in support of their Sewer Use Ordinance and Industrial Pretreatment Program. A detailed development effort, including field sampling and laboratory analysis, was necessary due to significant changes to wastewater plant treatment processes and influent flows and loads. When completed, the City will have toolsets to quickly evaluate the need for future adjustments to their Local Limits.
Additionally, CH2M HILL is working with Maryville to evaluate their sewer system in support of the City’s Sewer Rehabilitation Program. The current phase of work includes analysis of flow meter data in order to quantify and prioritize sewer basins for detailed SSES investigation of sewer assets. CH2M HILL and the City will work together to evaluate the results and develop input for their 5-year CIP related to the program.
Improvements to the Louisville Water Company’s Crescent Hill Water Treatment Plant
There will be a conference tour of this facility on Sunday, July 14, 1:00-4:00 PM.
Partnering with the Water Authority of Dickson County, TN
In 2012, CH2M HILL was asked to work with the Water Authority of Dickson County on two long-term planning projects. The first was an update to their existing water distribution system model, which has been crucial in the process of meshing the former distinct systems into one regional system. Today, with pressing needs to improve service in the southwestern quadrant of the system and to further integrate the Fairview system while working to more efficiently utilize the system’s three water treatment facilities, the modeling work is one of the most useful tools in their planning toolbox.
The other long-term planning need for the Water Authority of Dickson County involves a proactive approach to improving their sewer collection system. Unlike many systems who opt to wait until forced to do so through regulatory action, WADC is taking a proactive stance of developing a Corrective Action Plan for their sewer collection system. CH2M HILL is developing this Corrective Action Plan based off of flow monitoring data and CCTV data that has been collected over the past several months and prioritizing areas for rehabilitation where WADC has the potential to realize the best “bang for the buck” when allocating resources to address this issue.
CH2M HILL Offices Serving Kentucky and Tennessee
One Riverfront Plaza | 401 West Main Street | Suite 500 | Louisville, KY 40202-2576 | (502) 584.6052
210 25th Avenue North | Suite 500 | Nashville, TN 37203 | (615) 806.6560
2095 Lakeside Centre Way | Suite 200 | Knoxville, TN 37922 | (865) 560.2801
Robbie Cook at firstname.lastname@example.org
10123 Alliance Road | Suite 300 | Cincinnati, OH 45242 | (513) 530.5520