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Wastewater

Phone: 913-715-8500

11811 S. Sunset Drive, Suite 2500, Olathe, Kansas 66061

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Engineering Overview: Maps

Consolidated Main Sewer District Map

Johnson County's existing sanitary sewer infrastructure dates back to 1946. To help maintain this system and keep pace with Johnson County's rapid suburban development, Johnson County Wastewater uses new and emerging GIS (Geographic Information Systems) technology. Such systems enhance the ability to quickly access information concerning Johnson County Wastewater's infrastructure without the use of paper maps. Detailed information on the sewer system engineering records can be accessed through Johnson County's AIMS website. Be assured that our information is current as the databases are updated daily.

AIMS (Automated Information Mapping Systems) is the name of Johnson County's GIS. Current and future utilization of AIMS and Johnson County Wastewater's AIMS data layers greatly enhance staff's ability to access up-to-date information concerning the department's infrastructure without the use of paper maps. The use of GIS reflects a collaborative effort that uses data from city, county, regional, state, and federal resources.

Kansas Open Records Act Policy - Please Read Carefully

"No person shall knowingly sell, give or receive, for the purpose of selling or offering for sale, any property or service to persons listed therein, any list of names and addresses contained therein, or derived from public records..." K.S.A. 21-3914. Violation of this law is a Class C Misdemeanor and can subject the violator to prosecution and imprisonment up to 30 days and a fine of $500. Violators will be reported for prosecution. By accessing this site, the user makes the following certification pursuant to K.S.A. 45-220(c)(2): "the requester does not intend to, and will not:

  1. Use any list of names or addresses contained in or derived from the records or information for the purpose of selling or offering for sale any property or service to any person listed or to any person who resides at any address listed; or
  2. Sell, give, or otherwise make available to any person any list of names or addresses contained in or derived from the records or information the purpose of allowing that person to sell or offer for sale any property or service to any person listed or to any person who resides at any address listed."

Johnson County Wastewater Data Disclaimer - Please Read Carefully

It is understood that while the Automated Information Mapping System's (AIMS) participating agencies and information suppliers have no indication and reason to believe that there are inaccuracies in information incorporated in the base map, AIMS AND ITS SUPPLIERS MAKE NO REPRESENTATIONS OF ANY KIND, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE, NOR ARE ANY SUCH WARRANTIES TO BE IMPLIED WITH RESPECT TO THE INFORMATION, DATA, OR SERVICE FURNISHED HEREIN.

In no event, shall Johnson County Wastewater become liable to users of these data, or any other party, for any loss or damages, consequential or otherwise, including but not limited to time, money, or goodwill arising from the use, operation, or modification of the data. In using these data, users further agree to indemnify, defend, and hold harmless Johnson County Wastewater for any and all liability of any nature arising out of or resulting from the lack of accuracy or correctness of the data or the use of the data.

To assist Johnson County Wastewater in the maintenance of the data, users should provide their department information at the address shown below concerning errors or discrepancies found in using the data.

Johnson County Wastewater
Attn: AIMS Coordinator
11811 South Sunset Drive, Suite 2500
Olathe, KS 66061-7061

  • Please acknowledge Johnson County Wastewater and AIMS as sources when this data is used in the preparation of reports, papers, publications, maps, and other products.
  • To ensure that appropriate documentation and data limitations are provided, these databases should not be redistributed to any other parties.

Engineering Public Projects - Gardner Lake: Frequent Questions

General Questions

Q: If I sign the petition for sewers, do I have to connect to the sewer system?

A: No. You can decide if and when you would like to connect.

Q: What are low pressure sewers?

A: Low pressure sewers are sewer systems where each individual home has its own grinder pump unit which pumps into a pressurized system, which in turn, flows into a nearby conventional gravity sewer system.

Q: Why can’t we have regular gravity sewers?

A: Gravity sewers are not suitable for most lake communities. Low pressure sewers were designed to be used in lake communities.

Q: Can sewage be pumped into my house from the main line?

A: This is very unlikely as there are two check valves in the system between the main and the house to prevent this from happening.

Q: If the sewer district is created, is there any way to have the district creation documents require that Gardner Lake residents have a vote on any future annexation proposed by Gardner?

A: No. Current state statutes do not allow Gardner Lake residents a right to vote on future annexation proposals by the City of Gardner and the sewer creation documents cannot require it.

Q: Is the grinder pump unit (GPU) noisy enough to be heard?

A: No. The GPU is very quiet and can’t be heard unless you stand directly over it. Even then, it is very quiet.

Q: Which portion of the system is my responsibility?

A: The four inch service line that goes from the home to the grinder pump unit is the responsibility of the homeowner. The pump, control panel, discharge line, and main line are all maintained by Johnson County Wastewater.

Maintenance

Q: Must I pay for maintenance or replacement of the pump?

A: No. There is no separate charge for this service. Johnson County Wastewater pays for normal maintenance and replacement of the grinder pumps. Funds for this are collected with the bi-monthly user charges paid by all Johnson County Wastewater customers.

Q: How reliable are low pressure sewers?

A: This is a very reliable technology that has been used widely for over 30 years. Johnson County Wastewater has around 350 pumps in use today, dating back to 1998. Based on this experience, on average, a home with a grinder pump will have a maintenance call once every five years. Johnson County Wastewater's maintenance provider typically responds within two hours on every call and will restore service very quickly once they arrive.

Q: Whom should I call if there is a problem with my grinder pump unit?

A: Every control panel displays the 24 hour service phone number of our maintenance provider. Currently, every year Johnson County Wastewater sends out a letter and refrigerator magnet with the maintenance number listed.

Q: How do I silence my alarm once it has activated?

A: There is a button on the bottom of each control panel. Once you push it, the audible alarm will stop. However, the visual alarm will stay lit.

Electrical

Q: What happens if the electricity goes out?

A: First, you need to reduce water use as much as possible because there is limited storage in the pump unit, and if that storage is exceeded, the sewage will back up into your house. If the power is out for more than four hours, please call the 24 hour service phone number and a technician will be sent to hook a generator to your pump to pump it down. The technician can pump down the system twice a day, but due to limited storage in the pump unit, they are only pumping out about 30 gallons at a time. So, you should reduce water use as much as possible.

Q: How much electricity does the grinder pump unit take to operate?

A: According to the manufacturer, it takes the same amount of electricity to run a 40 watt light bulb 24 hours a day, or about $28 per year.

Q: What is the required capacity of the electrical circuit to accommodate the GPU?

A: 240 volts, and 20-30 amps. It may be necessary, at the homeowner’s expense, to upgrade to a 100 amp service if the existing service is less than 100 amp.

Construction

Q: Will the streets be repaired if the sewer line cuts through them?

A: Yes. Under the construction contract, the contractor must repair the roads, where they are damaged by the construction work, back to their original state.

Q: Where will the main lines be installed?

A: Generally, the mains are installed parallel to streets in street right-of-way, but not in the streets, except at locations where the main crosses the street.

Septic System

Q: If the sewers are installed and my septic system/holding tank is failing, will I have to connect to the existing sewers?

A: Yes. If there is a major problem with your septic system or holding tank, you will be required to hook to the existing sewer system at that time in accordance with the Johnson County Environmental Code under the jurisdiction of the Johnson County Health and Environment Department.

Q: Our home has a separate grey water (clothes or dishwater) discharge. Will these flows be directed to the sanitary sewer system?

A: Yes. If you decide to connect to the sewer system once the main lines are in, you will be required to reroute all wastewater to the grinder pump unit at that time.

Q: If I sell my house, must I have an inspection of my septic system?

A: Yes. Under county code requirements, every time a house changes ownership in the unincorporated area of Johnson County, the septic system must be inspected by the Johnson County Health and Environment Department.

Q: What happens if the Health and Environment Department finds a problem with the septic system?

A: If it is a minor problem, like a missing baffle or tee in the tank, it can be fixed without major expense. However, if there is sewage surfacing or a cracked tank, then a holding tank will be required if the property is within 200 feet of the lake. Also, if a sewer is available, the property owner will have to connect at that time.

Cost

Q: What happens if the cost of the project is greater than what is budgeted for the project?

A: Prior to the initiation of construction, if it is determined the project cost exceeds the budget cost by more than 10 percent, all property owners in the district will be notified of a public hearing to reconsider the project. After the hearing, the Board of County Commissioners will determine whether to complete the project. If the Board does not authorize completion of the project, any costs for engineering, right-of-way acquisition, etc. incurred, will be assessed to the properties in the district. If the Board authorizes completion of the project, property owners will be assessed the higher costs.

Q: How much does the grinder pump unit cost?

A: Currently, these pumps cost around $3,500 each. The total amount of an installed unit is approximately $7,500 to $8,500. This is a cost financed by the homeowner, not Johnson County Wastewater.

Q: How much will I have to pay if the sewer system is approved?

A: Every assessed lot would pay an estimated lump sum amount of $2,148. You can also choose to have this cost put on your tax bill over a 20-year period at an estimated 2.75 percent interest rate. The resulting estimated amount would be $141 per year for 20 years.  If the final cost of the project is more or less than these estimates, you will be assessed the actual costs.

Engineering Public Projects: DLSMB Cogeneration

In May 2009, federal, state, and local officials broke ground on the largest "green infrastructure" project in the State of Kansas to be funded by the American Recovery and Reinvestment Act (ARRA) of 2009 -- nearly $18 million in a series of improvements to Johnson County's Douglas L. Smith Middle Basin Treatment Plant (DLSMB).

The facility is located in Overland Park, bordered by commercial and residential development. Originally constructed in 1979, it was recently expanded from 12 million gallons per day (MGD) to 14.5 MGD and upgraded to meet strict nitrogen and phosphorus effluent goals. As a result of that expanded liquid treatment capacity, additional solids processing capabilities were needed. Thus plans were developed to expand the anaerobic solids treatment system.

This project was “shovel ready,” which was a requirement for funding when the ARRA was approved in 2009. Through the Environmental Protection Agency's State Revolving Fund program, administered by the Kansas Department of Health and Environment, this project was awarded $17.8 million as a “green” project with $8.1 million of this amount as principal forgiveness or in other words, a grant.

The co-generation facility at the Douglas L. Smith Middle Basin Wastewater Treatment Plant produced 7,014,000 kWh of green power (power produced off the grid) in 2013.

The project was originally borne of the desire to increase solids handling capacity while reducing the carbon footprint. In December 2007, the Johnson County Board of Commissioners passed a resolution to reduce greenhouse gas emissions by one third by 2020, County-wide by 80 percent by 2050, and to reduce GHG from energy use in new and largely renovated County buildings to zero by 2030. The project, built by contractor BRB Contractors, Inc. of Topeka, Kan., was officially approved by the Johnson County Board of Commissioners in March 2009.

Components of the treatment plant improvements included the construction of a new anaerobic digester, a FOG (Fats, Oils and Grease) station to more efficiently receive and treat used greases and oils from restaurants and industries, and a cogeneration system to produce virtually all of the plant's annual operating energy from captured biogases.

President Obama signed the American Recovery and Reinvestment Act of 2009 on Feb.17, 2009, and directed that the ARRA be implemented with unprecedented transparency and accountability. To that end, the American people can see how every dollar is being invested at www.recovery.gov. The Recovery Act seeks in part to spur technological advances in science and health and to invest in environmental protection and other infrastructure that will provide long-term economic benefits.

This project has attracted a good deal of attention, starting with the groundbreaking ceremony attended by dignitaries from the Kansas Department of Health and Environment, U.S. Environmental Protection Agency, Johnson County, and several media crews from local newspapers and TV stations.

  • The Environmental Protection Agency had a film crew out to shoot video to put on their website.
  • In February 2010, Craig Hooks, assistant administrator for the EPA Office of Administration and Resources Management, made a site visit to tour the project. Prior to his visit, he had recently highlighted this project during testimony on Capitol Hill (page 5) regarding EPA’s progress in implementation of the ARRA program in 2009.
  • At the summer meeting of the National Association of Clean Water Agencies, this project received the National Environmental Achievement Award.
  • Kansas City’s KCTV Channel 5 featured this project as a part of its investigation series, Road to Recovery? Going Green.
  • This project also made Vice-President Biden’s list of “100 Recovery Act Projects that are Changing America.”
  • MARC Sustainable Success Stories Award
  • NEHA Sustainability Award

Engineering Public Projects: Gardner Lake

Kill Creek #2, Lateral Sewer District #1

Current Status

J&N Utilities, Inc. has been awarded the sewer construction portion of this project and Electrical Associates LLC has been awarded the residential electrical portion. The Notice to Proceed for Construction of this project is scheduled for September 2015. Residents in this area can expect to see construction activities in association with this project for at least 18 months (September 2015 to March 2017). The contractors will contact all property owners connecting to sewers to notify them of the construction activities, as well as to schedule the required electrical work that will need to take place inside the house. The Notification of Contractors letter was mailed to all property owners in this district on August 17, 2015. This is the updated project cost sheet.

  • ADDITIONAL FUNDING INFORMATION: On June 18, 2015, a resolution to authorize additional funds to provide low pressure sewers to serve Lateral District No. 1 of Kill Creek No. 2 (LSD 1 of KC02) was presented to the Johnson County Board of Commissioners. The additional amount was $2,403,893, revising the total project authorization to an amount not to exceed $10,735,671. At the same meeting, the Board voted to authorize a contract with J&N Utilities, Inc., to construct Lateral Sewer District No. 1 of Kill Creek No. 2 for an amount not to exceed $7,409,542. Electrical Associates LLC was also authorized to construct the residential electrical portion of Lateral Sewer District No. 1 of Kill Creek No. 2 for an amount not to exceed $537,327.80. Once all contracts are signed, a pre-construction conference will be held with the contractors and a Notice to Proceed will be issued. Construction is anticipated to begin in August 2015. This link takes you to a video of the June 18 BoCC meeting.
  • Please call Johnson County Wastewater's Senior Engineering Technician at 913-715-8556 with any questions about the project or Low Pressure Sewers (LPS).

Video Recording - Info Meeting - Study Area No.1 of Kill Creek Sewer District No.2 4-2011

Background and Objectives

Following three requests for information meetings (the required number) by area residents, Johnson County Wastewater staff studied how this area might be best served by sanitary sewers, planned proposed sewers, and developed cost estimates. The project will serve approximately 85 acres and 352 properties around the Gardner Lake area with LPS. The proposed district consists of a residential neighborhood of 279 homes which are served by septic tanks. These sewers would provide service to all existing homes and vacant lots that could be developed in the proposed sewer district. The link above shows the proposed sewer district with the main lines.

The Kansas Department of Health and Environment (KDHE) administers a State Revolving Fund Loan Program (SRF) and has approved financing for this project. The program allows for a low interest loan from the state for a 20 year period to residents in the proposed district. It also calls for a 40 percent principal forgiveness (essentially, a grant) on the project. This program also offers financing for the installation of the grinder pump unit and connection fees for each home. Those properties that are “not assessed” will pay nothing. This color-coded map shows which properties are and which are not assessed.

A petition bearing signatures of owners of 57.9 percent (51 percent is the minimum required) of the land area in the proposed district requesting the installation of low pressure sewers was submitted to the County. A Public Hearing was held on Aug. 22, 2011. On Sept. 15, 2011, the Johnson County Board of Commissioners voted to approve the Gardner Lake Pressure Sewer Project. On March 8, 2012, the Board approved the KDHE SRF Loan Agreement for the project.

Project Facts

  1. Consistent with other similar projects, Johnson County Wastewater’s capital fund will pay for some of the proposed project costs. In this case, it is estimated that the department will pay for approximately 63 percent of the overall project cost to construct the main lines. This reduces the overall assessment for each property owner. The remaining costs will be paid for by a benefit district. The boundary of the proposed district is shown on the two map links above.
  2. Low pressure sewers are the only type of sewers feasible for this proposed area due to the topography of the land.
  3. Johnson County Wastewater provides 24 hour service to homes on grinder pumps via a contract provider. There is no separate charge for this service. During power outages longer than four (4) hours, Johnson County Wastewater's contractor is required to power individual units with a portable generator.
  4. Based on the current alignment, this project will consist of:
    1. Total estimated project cost prior to 40 percent principle forgiveness
      •  $4.6 M sewer mains, $6.1 M LPS pumps, $1.0 M connection costs
      •  Estimated length of sewer line: approximately 30,000 feet
    2. Estimated project cost to each assessed property after 40 percent principle forgiveness
      •  $191 (main) + $992 (pump) per year if spread over 20 years. See project cost sheet link above for more details and additional costs.

Key Contacts

Senior Engineering Technician, 913-715-8556
New Development Engineer, 913-715-8532

 

Engineering Public Projects: I/I Study Overview

Current Project Status

All construction phase work was completed in May 2013. Johnson County Wastewater will conduct post-construction flow monitoring, data analysis, and evaluation of the effectiveness of the completed construction through 2014. As part of the post-construction evaluation, Johnson County Wastewater is also evaluating the costs of numerous infiltration and inflow (I/)I removal strategies and will then determine how best to achieve I/I removal in the remaining watershed areas. Ultimately, Johnson County Wastewater's concern is to provide more dependable, cost-effective, and environmentally sound wastewater service to our customers. Please call Johnson County Wastewater's Project Manager at 913-715-8544 with any questions.

Project Description and Objectives

Sanitary sewer system performance within two watersheds, Mission Township Main (MTM1) - located in Prairie Village and Shawnee Mission Turkey Creek (SMTC) -  located in Shawnee, is impacted by the magnitude of wet weather flows (I/I) that enter the sanitary sewer system through cracked or broken pipes, root penetrations, illicit connections, and other deficiencies within the system. The wet weather flows are also the result of illicit connections. This pilot study is needed to fill a critical gap in the data that exists relative to the system improvements necessary to adequately manage I/I, and in so doing meet both customer service goals and respond to evolving regulatory requirements established by the Environmental Protection Agency (EPA). The project included the construction phase which involved repair of the sanitary sewer system to remove I/I.

Lessons learned from the study and construction phases of this project will be used to develop the process and procedures for future removal of public and private sector I/I sources throughout the entire MTM1 and SMTC watersheds.

Study Phase (2009)

The Pilot I/I Project was initiated in March 2009 as a result of ongoing efforts by Johnson County Wastewater to effectively manage wet weather flows in the Nelson service area and is part of the most recent permit renewal process for the Nelson Treatment Complex. The study phase was completed in April 2010. The study involved a series of inspections, including televising of sewer lines and house service laterals, visually inspecting homes and businesses (including internal basement plumbing), manhole inspections, smoke testing, and various other inspections. The project took place in three (3) selected areas suspected of having high I/I:

Turkey Creek
(Shawnee - Vicinity of Quivira Road from Johnson Drive to 50th Street)

  • 677 buildings
  • 50,000 feet of sanitary sewer pipe      
  • 203 manholes

Mission Main
(Prairie Village - Vicinity of Roe Avenue from 75th Street to 79th Street)

  • 288 buildings
  • 20,000 feet of sanitary sewer pipe
  • 111 manholes

Leawood
(Lee Boulevard to State Line Road and 80th Street to 87th Street)

  • 327 buildings
  • 35,000 feet of sanitary sewer pipe
  • 170 manholes

Construction Phase (2011)

The construction activities on this project included rehabilitation and repair of existing sanitary sewer mains and private service lines, and disconnection of sources within buildings and on private property. Construction was completed in May 2013. The two links above to the project study maps show not only pilot I/I rehabilitation areas, but also where the strategies listed below were used:

  • Everything – rehabilitate all main sewers, manholes, service line connections, and service lines; and remove all identified building and inflow sources/defects
  • Private Only – rehabilitate all service line connections and service lines; and remove all identified building and inflow sources/defects
  • Public Only – rehabilitate all main sewers and manholes
  • Typical Comprehensive – rehabilitate main sewers and manholes that are contributing significant amounts of I/I; and remove all identified building and inflow sources/defects
  • Typical Comprehensive + LL – rehabilitate main sewers and manholes that are contributing significant amounts of I/I; remove all identified building and inflow sources/defects; and rehabilitate all service line connections and lower laterals (i.e., service line between main sewer connection and a point between three (3) and 10 feet from main sewer)
  • Control – no rehabilitation work will occur

This project included three (3) general types of construction:

  1. Rehabilitation of Johnson County Wastewater's or public main sewers and manholes
    • Construction of four (4) manholes
    • Rehabilitation of 123 manholes
    • Main sewer open cut excavation replacement (250 ft)
    • Main sewer trenchless (pipe bursting) replacement (274 ft)
    • Main sewer trenchless (CIPP lining) rehabilitation (28,585 ft)
  2. Rehabilitation of private service lines (the pipe that connects private buildings to the main sewer)
    • Cleanout Installations (203)
    • Service line open cut excavation replacement (11 properties)
    • Service line trenchless (pipe bursting) replacement (2 properties)
    • Service line trenchless (CIPP lining) rehabilitation (377 properties)
  3. Remove building and inflow sources/defects. For example, removal of sump pump discharge connections to the sanitary sewer. In some cases, this construction required access inside the home.

Engineering Public Projects: Lone Elm and 180th

Little Bull Creek #1 - Lateral Sewer District #2

Current Project Status

-A Public Hearing regarding a Special Assessment for Lateral Sewer District No. 2 of Little Bull Creek No. 1 was held July 23.

The method of assessment for this district is the Per Homesite Method. This method recognizes the equal benefit to each homesite and apportions costs equally. All 65 homesites within Lateral Serwer District No. 2 of Little Bull Creek No. 1 will pay an equal share of the pressure main costs and the 56 homes that had pumps installed by this project will in addition pay equally for the pump system costs.

Any questions about this project should be directed to Johnson County Wastewater's Senior Engineering Technician at 913-715-8556.

Background and Objectives

Following several requests for information meetings by area residents, Johnson County Wastewater staff studied how this area might be best served by sanitary sewers, planned proposed sewers and developed cost estimates. The project will serve approximately 38 acres and 63 properties with low pressure sewers, including all existing homes and any vacant lot that could be developed in the sewer district.

The Kansas Department of Health and Environment (KDHE) administers a State Revolving Fund Loan Program (SRF) and has approved financing for this project. The program allows for a low interest loan from the state for a 20 year period to residents in the proposed district. It also calls for a 40 percent principal forgiveness (essentially, a grant) on the project. This program also offers financing for the installation of the grinder pump unit and connection fees for each home. Project cost sheet 

A petition bearing signatures of owners of 57.9 percent (51 percent is the minimum required) of the land area in the proposed district requesting the installation of low pressure sewers was submitted to the County. A Public Hearing was held on Aug. 25, 2011. On Sept. 22, 2011, the Johnson County Board of Commissioners voted to approve the Lone Elm Pressure Sewer project. On March 8, 2011, the Board approved the KDHE SRF Loan Agreement for the project.

Engineering Public Projects: Overview

Investing in Our Infrastructure

Johnson County is a community that is thriving both socially and economically. This continued prosperity is strengthened by having reliable and sustainable wastewater networks with the capacity to support the community. Johnson County Wastewater's Engineering Group manages sewer design and construction projects throughout the County. These improvements are being built so that we can continue to provide you, our customers, with reliable sanitary sewer service.

Living With Construction

Johnson County Wastewater does all it can to minimize the impact of sanitary sewer construction on people who live and work in the project areas. Sometimes this work goes unnoticed because it often takes place underground. But occasionally work must be done in streets or alleys near homes or businesses. We take care to reduce noise, dust, traffic, and any other potential construction nuisance to a minimum. We also meet with and mail updates to impacted neighbors before and during construction to get their input and provide them with progress reports.

Sewer Expansion

The traditional method for enlarging Johnson County Wastewater’s sewer service area is to petition to add the described land to the Consolidated Main Sewer District (CMSD).  The enlargement process is described in the link below. Publically-financed main sewers do not serve every parcel of land within a watershed, but provide the backbone of the sewer system.  Branch lines which extend from these publically-financed main sewers are privately financed by the property owners.

Enlargement Process

Public Meetings

Engineering

Service Area Brochure explains the costs and process of bringing properties into the Johnson County Wastewater Service Area for sanitary sewers.

Contract District Brochure explains the costs and process of creating a Contracy District within the Johnson County Wastewater Service Area for sanitary sewers.

Engineering Public Projects: Tomahawk Creek Wastewater Treatment Facility Improvements

The Tomahawk Creek Wastewater Treatment Facility, located at 10701 Lee Boulevard in Leawood, was originally built in 1955. The facility treats wastewater from the Tomahawk Creek watershed, the Indian Creek watershed downstream of the Douglas L. Smith Middle Basin WWTF (Lower Indian Creek), and the Dykes Branch sub-watershed. It currently treats 7 million gallons per day, which is 40 percent of the wastewater collected from parts of Leawood, Olathe, Overland Park, and Prairie Village. The remaining 60 percent is currently sent to Kansas City, Mo., for treatment.

Current Status

Johnson County Wastewater is currently proceeding with the detailed design of the improvements recommended in the Preliminary Design Report, prepared during the project definition phase. It is anticipated that the project will utilize an alternate delivery construction approach. Award of the construction contract will occur in mid-2018, following the Kansas Department of Health and Environment's approval of final design documents. Work at the treatment facility is expected to be completed by the end of 2021.

The public will be updated throughout the entire process. Your input will be important as decisions are made, so please participate in future public meetings as well as continue to monitor this webpage for project updates.

Project Definition Phase

The Project Definition Phase of the expansion was recently completed and focused on the following tasks: refining the previously recommended improvements, project costs, and schedule; developing a conceptual level site plan to support public outreach efforts and site permitting; and negotiating and finalizing a discharge permit for the new facilities. The results of this effort are summarized in the Preliminary Design Report.

Process Improvements Pre-Design Study

Several studies were prepared to determine the future of the Tomahawk Creek Wastewater Treatment Facility. The Pre-Design Study evaluated various treatment alternatives and capacity scenarios using the latest user rate information and regulatory perspectives. The study identified $280 million in investments to expand the facility to 19 MGD as the most beneficial alternative.

Tomahawk Creek Wastewater Treatment Facility Improvements Fact Sheet

Section 1: Executive Summary
Section 2: TM 1 - Basis of Analysis
Section 3: TM 2 - Alternatives Identification & Development
Section 4: TM 3 - Alternatives Selection - Dry Weather Treatment
Section 5: TM 4 - Wet Weather Flow Evaluation & Alternative Definition
Section 6: TM 5 - Wet Weather Flow Alternatives Selection
Section 7: TM 6 - Combined Dry & Wet Weather Alternative Selection

Public Outreach

The project team has completed several public outreach meetings, including a presentation to the Leawood City Council on Feb. 1, 2016, and a public meeting on Mar. 22, 2016. A recommendation for the design phase of the project was presented to the Johnson County Board of County Commissioners (BOCC) on Mar. 31, 2016. At that time the BOCC directed JCW to execute the regulatory permit for the project and to bring forward an authorization for design of the recommended improvements. At its regular meeting on May 5, 2016, the Johnson County Board of County Commissioners unanimously approved authorization of funding for the design phase of the Tomahawk Creek Wastewater Treatment Facility expansion and upgrade. If you have any questions regarding the project, please contact Lori Sand, Johnson County Wastewater's Director of Communications at 913-715-8572.

Media Coverage

Tomahawk treatment plant takes step toward $280 million rebuild

Tomahawk Wastewater Treatment Facility gets green light from Johnson County Commission

Johnson County Wastewater proposes $280 million expansion of Leawood facility that treats some NEJC wastewater

New EPA guidelines to affect Tomahawk sewage treatment plant

 

Engineering: Backup Prevention Program (BUPP)

In the past, some Johnson County homeowners have faced the frustrating challenge of basement flooding during extremely heavy rains. There are several common causes for wet basements. Because Johnson County Wastewater wants to help you better protect your home during these rains, a Backup Prevention Program is available to homeowners. This program is voluntary and provides funding to eligible homeowners so they may install a backup prevention device or make plumbing modifications on their property.

There are many options available under this program. A contractor and Johnson County Wastewater will work with you to determine the option that offers the best solution for your property. Since the plumbing system in each home is unique, a contractor must inspect and determine the best solution to protect your property from future sewer backup. This may include a combination of options recommended by Johnson County Wastewater and the contractor.

This program is intended to help protect your home from future backups during heavy rains. However, a backup device or these plumbing modifications will not resolve basement water problems caused by cracks in walls, floors, window well leakage, and surface water flooding.

Eligibility

Johnson County Wastewater serves most cities in Johnson County. Only residents served by Johnson County Wastewater are eligible for this assistance.To be eligible for the program, your home must have experienced a confirmed sanitary sewer basement backup as a result of an intense rain event. The backup must have been the direct result of capacity problems in the sanitary sewer system. Johnson County Wastewater willl be responsible for confirming whether you are a qualified homeowner and will determine eligibility through the following process:

  • determine if your property is located in a flood-prone area
  • review Sanitary Sewer Backup Response Questionnaire submitted by the homeowner
  • determine if your neighbors are also experiencing sanitary sewer backups
  • check Johnson County Wastewater's history of cleaning and televising of the line
  • conduct on-site visit with you to determine the cause of the flooding

Process

  1. Please complete the Sanitary Sewer Backup Response Questionnaire either online or ask that one be sent to you. All property owners who report a sanitary sewer backup need to also complete the questionnaire.
  2. Johnson County Wastewater reviews each questionnaire and evaluates each property to determine whether basement flooding was the direct result of a sewer backup. Homeowners will receive a letter from the utility detailing the property's status. If you do not qualify, you may email Johnson County Wastewater to request a discussion of the decision in greater detail.
  3. If you are eligible, you will receive an information packet, including:
    1. details on the backup prevention procedure
    2. an agreement that must be signed before any work by the contractor begins
    3. a copy of the release you will sign once the contractor completes the specified work on your property
  4. Once you receive the information packet, you will obtain two (2) estimates for work to be performed on your property. Johnson County Wastewater has compiled a list of contractors for your convenience only. Contractors placed on the list have confirmed interest in this program and have attended an informational meeting on the Backup Prevention Program. Copies of the estimates and agreements may be submitted either by scanning and emailing to bupp@jcw.org or by U.S. mail to Johnson County Wastewater, ATTN: Troy Young, 4800 Nall Avenue, Mission, KS 66202. At this time, you may elect not to particpate in the program and should indicate this on the bottom portion of the agreement.
  5. Johnson County Wastewater will then review the estimates. For your protection, additional estimates may be required. Johnson County Wastewater will notify you of the approved estimate.
  6. Schedule the work to be done on your property. The contractor is responsible for all permits and city inspections. Once the work is completed, please notify Johnson County Wastewater to schedule an inspection. The department's inspector willl verify that the work, as outlined in the estimate, has been completed.
  7. Following Johnson County Wastewater's confirmation of installation, please sign and return the release form which was enclosed in your information packet. Once this has been completed, Johnson County Wastewater will either make payment to you (if you have provided verification of your payment to the contractor) or to the contractor. You will be responsible for any additional costs not outlined in the estimates you submit.

Options under the Backup Prevention Program

A Johnson County Wastewater representative is available to meet with you and your contractor to discuss all options in deciding the best possible solution for your property.

Backup Prevention Valve

A contractor may recommend installation of a backup prevention valve on the sanitary sewer service line just before it exits your house. This will require that a small portion of the basement floor be removed and the service line exposed for installation of the valve. Due to the regular maintenance required by the valve, Johnson County Wastewater recommends that the valve be installed in a location which is easily accessible on a regular basis.

Sewage Ejector Pump

A contractor may recommend a sewage ejector pump as an alternate to a backup prevention valve when floor and laundry drains are the only basement plumbing fixtures. Sewage ejector pumps are located in the basement and the drain lines from floor drains and sinks are connected to its basin. The pump located inside the basin has a float system that when activated will move solids and liquids to a higher elevation before it enters the home's sanitary plumbing again.

Contractor Qualifications

Johnson County Wastewater's list of contractors is for your convenience only. Contractors placed on the list have confirmed interest in this program and have attended an informational meeting on the Backup Prevention Program. Property owners are not obligated to employ a contractor on the list, and have the right to obtain a bid from any contractor.

Contractors performing work under this program shall maintain commercial general liability, including completed Operations coverage with a minimum limit of $500,000 combined single limit property damage and bodily injury liability, and Worker's Compensation coverage, if required by the State of Kansas or Missouri, depending on the place of business. Missouri contractors who maintain Worker's Compensation coverage shall have an "All States" endorsement included on their coverage.

Johnson County Wastewater does not endorse or recommend contractors for the purpose of installing backup prevention devices or the installation of sewage ejector pump systems. Any contractor who generates numerous complaints from property owners or neglects to perform quality workmanship shall be removed from the list at the discretion of Johnson County Wastewater.

Responsibility and Liability

Contractor

  • The contractor is responsible for all permits and city inspections.
  • All work performed under the Backup Prevention Program will be warranted by the contractor for a period of not less than one (1) year following the date of installation.

Property Owner

  • Prior to the beginning of any work, an agreement must be signed by the property owner and returned to Johnson County Wastewater.
  • Following completion of work, the property owner must sign a release form and return it to Johnson County Wastewater.
  • Once the work is completed, please notify Johnson County Wastewater to schedule an inspection.
  • No payment will made to the property owner or the contractor until both forms have been submitted.
  • Any property owner refusing to sign an agreement or release will not be eligible for funding under Johnson County Wastewater's Backup Prevention Program. 
  • Routine cleaning of the backup prevention valve will be the responsibility of the property owner from the date of installation.
  • Any maintenance, repair, or replacement costs associated with the backup prevention valve or any modifications of the plumbing shall be the responsibility of the property owner following the one (1) year warranty period. 

Johnson County Wastewater

  • Johnson County Wastewater shall not be responsible for any malfunction of the valve or plumbing modification which results in a sanitary sewer backup.
  • Johnson County Wastewater shall provide a copy of the release form to the property owner prior to the completion of any work.
  • The Backup Prevention Program funding covers only new devices and installations.

Recommended Annual Backwater Valve Maintenance

Since 1984, Johnson County Wastewater has spent in excess of $84 million to reduce the number of wet weather-related backups into homes and businesses. During this time, Johnson County Wastewater has reduced the number of annual wet weather sewer backups from more than 1,000 in the early 1980s to about 20 today. While the department has made great progress in this area, there are remaining problem areas where solutions have been more difficult to implement. As the department continues to study these difficult areas, property owners are encouraged to perform annual checks on the backwater valve to ensure that it is operating properly. This is particularly important prior to the spring storm season. This link will provide information regarding the operation and maintenance requirements of a typical backwater valve. Any maintenance, repair, or replacement costs associated with the backup prevention valve or any modifications of the plumbing shall be the responsibility of the property owner following the one (1) year warranty period. 

For additional information:

This link provides you with the Back-up Prevention Program brochure

Please either email Johnson County Wastewater's Engineering Technician or call 913-715-8554.

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