Building Johnson County Governments Largest Project Tomahawk Creek - - PowerPoint PPT Presentation

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Nov 17, 2023 314 likes •729 views

Building Johnson County Governments Largest Project Tomahawk Creek Wastewater Treatment Facility Why Wastewater Treatment 2 About JCW Located in northeast Kansas Established in 1945 Enterprise funded 220 employees 6

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Building Johnson County Government’s Largest Project – Tomahawk Creek Wastewater Treatment Facility

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Why Wastewater Treatment

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About JCW

Located in northeast Kansas
Established in 1945
Enterprise funded
220 employees
6 WWTFs
32 pump stations
2,200 miles of sewer
500,000+ residents served
60 million gallons treated

each day

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About Tomahawk Creek WWTF

Leawood. Mission Rd and Lee Blvd
Established in 1955
Trickling Filter Facility
1980s Linking Interceptor
7 mgd onsite/10 mgd to KCMO
150,000 – 190,000 residents

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Blue River Basin

Kansas Missouri

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Drivers for Upgrade

Age of equipment
New regulations for

water quality

Increasing operational costs

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Planning Process

Previous Studies 2006 and 2013

– Evaluated 8 Alternatives – Evaluated 0 MGD, 10 MGD, and 19 MGD – Recommend 19 MGD Option

Project Definition Phase 2014-2015
Design and GMP Development 2017 – 2018
Construction 2018 - current

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Missouri River Load Reductions Relative to Existing Condition Baseline

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All flow Some Flow No Flow

Financial Evaluation of Options

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Operating Cost Comparison

Reduced Costs: $453 Million

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Goals for Long-Term Investment

Preserve high quality of life
Improve water quality
Provide the most cost-

effective long-term solutions for customers

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Existing Tomahawk Creek WWTF

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Preliminary Design Concept

Reuse Influent Pumping

Station and Digester Complex

IFAS BNR Basins & Blower

Building

Separate Sludge

Processing

Dual Purpose

Compressible Media Filters

Disinfection and

Reaeration Facilities

Concrete Lined Excess

Flow Holding Lagoon

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Dual Purpose Compressible Media Filters

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Tomahawk Creek Proposed Delivery Methods

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Why CMAR for this Project

Collaboration between All

parties

Signiant Pre-design already

completed

High risk, complicated project
Earlier cost certainty
Optimize design

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Tomahawk Creek Proposed CMAR Schedule

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Value Engineering led to Design Evolution

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Evolution of the Site

April 2017 July 2017

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Facility Protection Without Flood Rise

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Bedrock is at Different Elevations at Site

Rock Fill Only Piers Only Piers with Rock Fill

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Power Limitations were Addressed

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BIM / VR Tools were Utilized for Project

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Bluebeam was Used to Review Documents

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VE Analysis Continues during Construction

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Construction Statistics

250,000 CY of Earth to Move
53,000 CY of Structural Concrete
3 Miles of Electrical Ductbank
110,000 LF of Pipe (Above & Below

Grade)

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Plant Flow Diagram

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Startup Process Overview

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BNR Basin & Basin Blower Building

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Filter Disinfection Complex

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Solids Processing Building

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Administration Building

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Construction Challenges

2018 & 2019 - Wettest Water

Calendar Year in Kansas (57.88 inches)

Adjusting to COVID-19

Procedures

Tight Construction Footprint
Unforeseen Rubbish During

Excavations

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Project Successes

MOPO: Collection System Diversion Evergy Substation Energized

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Facility Startup

Coordination Meetings w/ Key

Personnel

Energization & LOTO Plan
System Startup Plans
Key Construction Milestones

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Lessons Learned

Know your site and existing facilities
Exploratory digging
SCADA Screen Development

– Big project – a lot to take on at once

Engage CMAR early
Communication, Trust, Teamwork

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For Updates: www.jcwtomahawk.com

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