South Fork improvements program – a mid-program report NC AWWA-WEA 95th Annual Conference Template Revised 13 January 2012 South Fork improvements program – a mid-program report Kent A. Lackey, P.E. – Black & Veatch Project Manager

AGENDA Background Program Overview Program status Early successes

Background – Wastewater system Winston-Salem/Forsyth County Utility Commission Approximately 122,000 customers (3rd largest in NC) 2 WWTPS Muddy Creek 21 mgd capacity Archie Elledge 30 mgd capacity Three Drainage Basins South Fork Elledge 49 WW Lift Stations 1,723 miles of sewer Archie Elledge WWTP Muddy Creek WWTP

Background – long term wastewater treatment analysis Archie Elledge WWTP Muddy Creek WWTP Muddy Creek Basin South Fork Basin Elledge Basin South Fork PS New MC Transfer PS Where is it being generated? Convey all flows to plants using existing infrastructure Transfer flows between plants Transfer flows between basins System Equalization Scalping within the collection system Future New Plant introductions Future Plant Option 1 Future Plant Option 1

South fork improvements program program partners Program Owner : CCUC Program Consultants: Utilities Administration Hazen and Sawyer: Interceptor Design/EA Wastewater Treatment Highfill Infrastructure: Kerner’s Mill Design Collection & Maintenance Finance Southeastern Electrical Consultants: Kerner’s Mill PS Design City Attorney Program Manager: Black & Veatch Carolina Ecosystems: Environmental Field Support Program Management Hydromax USA: Pipeline Inspection MCCIPS and Force Main Design Allied Associates: Surveying Optimization Study/Design Sanborn: Aerial Topography Funding Assistance S&ME: Geotechnical Regulatory Permitting Clemson Engineering Hydraulics: Physical Modeling

South fork improvements program overview 26 December 2012 South fork improvements program overview Kerner’s Mill PS and Force Main Design Lead: Highfill Linville Springs & Wexford PS Design Lead: CCUC MCCIPS and Force Main AEWWTP Equalization Facilities AEWWTP Aeration Upgrades(New) MCWWTP Power Generation Upgrades(New) Design Lead: Black & Veatch South Fork Interceptors Design Lead: Hazen and Sawyer SSES Projects Design Lead: Several PowerPoint Sample

General program status project update – Optimization Study 26 December 2012 General program status project update – Optimization Study Study Completed in 2013-2014 Aeration/DO Evaluation Gas Utilization Evaluation Sidestream Treatment Evaluation for N and P Chlorine Control Performance Management System Energy Management Via Ammonia Control Interplant Pumping Control System Result: AEWWTP Aeration Upgrade and Power Generation Projects Initiated PowerPoint Sample

South Fork Program projects Additional Program Projects Process and Energy Optimization Study for AEWWTP and MCWWTP Program Funding Program Funding Application and Administration for State Revolving Fund Loan Federal Funding Screening and Application for all 2014 CIP projects Other Projects Added to the Program AEWWTP Equalization Facilities AEWWTP Aeration Improvements MCWWTP Power Generation Upgrades MCWWTP Blower Upgrades Funding

Program financial update program budget - construction 26 December 2012 Program financial update program budget - construction Current Anticipated Program Construction Cost: $98,320,000 MCWWTP CIPI: $51,060,000 MCWWTP Transfer Force Main: $4,850,000 AEWWTP Day Tanks: $9,000,000 AEWWTP Aeration System: $4,700,000 South Fork Interceptor Contract 1: $12,550,000 South Fork Interceptor Contract 2: $5,360,000 (estimated) Kerner’s Mill Force Main: $3,200,000 (estimated) Kerner’s Mill Pump Station Upgrade: $1,600,000 (estimated) MCWWTP Power Generation: $6,000,000 (estimated) Program is currently approximately $8M under budget PowerPoint Sample

General financial update program funding 26 December 2012 General financial update program funding SRF CS370399-08 $70,500,000 Loan Granted (2% rate) Funds MCCIPS, Force Main, AEWWTP Equalization SRF CS370399-09 $9,399,200 Loan Granted (2% rate) Funds SSES Projects: Peters Creek, 21st Street, Ardmore Basin No. 1 SRF CS370399-10 $1,079,400 Loan Granted (0% rate) Funds AEWWTP Aeration System Upgrade SRF CS370399-11 $6,003,772 Loan Granted (0% rate) Funds MCWWTP Power Generation Facilities Future Application MCWWTP Blower Replacement South Fork Interceptors PowerPoint Sample

program schedule update 26 December 2012 program schedule update Project Design Completion Construction Start Final Completion MCCIPS Complete 1/28/15 5/31/17 MCCIPS Force Main 6/15/15 8/16/16 AEWWTP Equalization System 6/25/15 11/17/16 AEWWTP Aeration Upgrades 9/1/15 5/27/16 MCWWTP Power Generation 10/31/15 2/2016 2/2017 Kerner’s Mill Force Main 1/2016 8/2016 Kerner’s Mill Pump Station Upgrade 2/2018 South Fork Interceptor Contract 1 7/15/15 12/16/16 South Fork Interceptor Contract 2 11/2015 11/2016 Red text indicates projects currently in construction PowerPoint Sample

General program status project update - MCCIPS 26 December 2012 General program status project update - MCCIPS Muddy Creek WWTP Consolidated Influent Pumping Station 82 mgd Influent PS Expandable to 138 mgd Screening/Grit Removal 9.5 mgd Transfer PS & 30” Force Main Expandable to 30 mgd Odor Control 2 - 1 MG Day Tanks 2 – 3.9 MG Storm EQ Basins Electrical Switchgear Replacement NPW Pump Replacement Demolition of Exist Primary Treatment and Influent PS Ferric Chloride Storage/Feed PowerPoint Sample

General program status project update - MCCIPS 26 December 2012 General program status project update - MCCIPS PowerPoint Sample

General program status project update – AEWWTP 26 December 2012 General program status project update – AEWWTP Elledge WWTP Equalization Objective: Combine AEWWTP and MCWWTP Flows and Equalize Diurnal Variation 2 – 2.0 MG Day Tanks w/ Vertical Mixers Rate Control Structure Elledge Aeration Upgrades Segment Aeration Basins into 4 independent DO Control Zones Results: Reduce air requirements by 7,300 scfm Approximate Power Savings: $186,000/yr Approximate 3-4 yr payback PowerPoint Sample

General program status project update – MCWWTP Power Generation 26 December 2012 General program status project update – MCWWTP Power Generation MCWWTP Power Generation 1 - 1.1 MW Dual Fuel Engine Generator Self Enclosed Outdoor Unit 800kW Capacity on Digester Gas 1.1 MW Emergency Capacity on Natural Gas Power Supplied to Grid Digester Gas Cleaning: particulates, moisture, H2S Compressor via Blowers Waste Heat Hot Water for Digester Heating Approximately 8 yr payback PowerPoint Sample

General program status project update – Interceptors 26 December 2012 General program status project update – Interceptors Contract 1 23,900 LF of 54” pipe Pipe Material: FRP with DIP at road crossings Contract 2 8,860 LF of 15-42” pipe Pipe Material: FRP (42”), DIP (42”), Clay (15”/18”) PowerPoint Sample

South fork program early successes Pumping System Final Capacity Refined at 30% Design Reduced due to Muddy Creek Basin Master Plan and South Fork Basin Refinement Reduce PS Cost and Deferred Initial Equipment (Approx. $1M) No Impact to Aggressive Schedule for South Fork Basin Improvements Basin 5 yr Storm Peak Flow (mgd) Initial 2041 Flows Final 2041 Flows Muddy Creek Basin 110(Assume 3.4 PF) 92.9 South Fork Basin 40 35.6 Davidson County 1.5 10.0 Total 171 138.5

South fork program early successes Two significant Program Interceptor Projects were Deferred ($11M) South Fork Basin MP Re-calibration Efforts Completed and Assessed Before Detailed Design Commenced Reduced Program Construction and Engineering Cost No Impact to Aggressive Schedule for South Fork Basin Improvements Projects Deferred Program Manager was Able to Make Effective, Ongoing Decisions Based on Collective Information

Consolidated industrial allocation tracking Archie Elledge WWTP This figure provide a nice snapshot of how the overall system will be configured There is approx 4.6miles between plants with a elevation difference of less than 20 feet Three outfalls lead to the AEWWTP and are pumped into the plant by the IPS Two outfalls lead to the MCWWTP and are either pumped into the plant or transferred to the AEWWTP via a 30” force main They have the ability to measure flow from the various outfalls and will also have the ability to measure COD/TOD load into the plants. Muddy Creek WWTP Transfer Force Main 19

South fork program early successes The Program Team is Driving Effective and Open Collaboration Multiple Projects MCWWTP Clarifier Improvements Project Collection System Master Plan Project South Fork Program Multiple Engineering Firms Provide Collective Decision Making Winston-Salem Black & Veatch Hazen & Sawyer Highfill Infrastructure Engineering Winston-Salem is Benefiting from Collective Expertise and Effective Collaboration

South fork program early successes Benefiting from Effective Collaboration Exchanged Scope Between MCWWTP Clarifier Improvements Project and Program Project Deferred Sitework to Program; Moved Clarifier Splitter Structure to Clarifier Project Evaluating and Coordinating Project Sequencing Interceptor Designers Considered “Replace in-place” concept to avoid considerable rock removal along alignment Program Manager Evaluated Interceptor Sections and Impact on MCWWTP Flows Evaluated Early Milestones in PS Project to Incorporate Higher Influent Flows to Allow full “replace in-place” Without Delay to Program Completion

South fork program early successes Significant Benefits in Bidding and Construction Significant Contractor interest including in some cases 15 bidders for a project. Consolidated and coordinated construction administration efforts Consolidated database for construction documents and records to keep things organized for CCUC

conclusions Unique Program Management Approach Has Created Value for CCUC Allows for Expediting Relief of South Fork Basin While Concurrent Projects are Completed Allowed to Initiate Projects without “Final” design criteria in order to Expedite Completion Consolidated “like” Efforts Increasing Efficiency and Reducing Cost Greatly Reduced CCUC Staff Requirements for a Complex set of Projects Single Point of Responsibility with a High Level of Collaboration Between Team Members – Increasing Quality and Value.