Redundancy and Emergency Interconnectivity (REI) Plan For the Coosa North Georgia Region May 4, 2016 Presented by: Michelle Vincent, Jacobs and Tanya Kinnard, Amec Foster Wheeler

Introduction Background 2015 Seed Grant Completed first focus area Redundancy and Emergency Interconnectivity Study Service Areas Existing interconnections Emergency scenarios and reliability targets for focus area Additional interconnection projects and costs Next steps and recommendations Water Transmission Grid Study Conceptual grid development Potential sources Recommendations and costs Future Activities

Background Studies were commissioned by the Coosa North Georgia Regional Water Planning Council (“Council”) to support Regional Water Plan implementation efforts The Council: Established by Georgia's State Water Plan in 2008 Sets direction, goals, and policy for water planning in the region Works closely with Georgia Environmental Protection Division to produce Regional Water Plans and support implementation Meets semi-annually to quarterly The North Georgia Water Partnership (“Partnership”) serves as the technical advisory body for the Council, in addition to implementing goals for water planning and service for the region. The Partnership: Formed in 2003 Provides proactive regional water-based planning, technical assistance and education Meets monthly and assists with implementation process

Background Coosa North Georgia Water Planning Region River basins: Tennessee, Coosa, Chattahoochee, Savannah

Redundancy and Emergency Interconnectivity Major tasks of Study: Data collection Determine Service Areas - Coosa North Georgia Region Analyze and map existing interconnections – Coosa North Georgia Region Evaluate emergency scenarios and reliability targets Propose additional interconnection projects Next steps and recommendations

Redundancy and Emergency Interconnectivity Determined and mapped service areas for region Public Water Service Areas

Redundancy and Emergency Interconnectivity 2016 Seed Grant Goal is to cover entire Coosa Region and incorporate appropriate findings and targets into Regional Plan 2015 Focus Areas Complete Chatsworth Dalton Rome (Floyd County) Calhoun 2016 Focus Areas by phase Dade, Walker, Catoosa, Chattooga, Polk, (Tennessee) Gilmer, Murray, Pickens, Dawson, (Big Canoe), (Tennessee), (connections with Cherokee Co and Metro Influence) Fannin, Union, Lumpkin, (Tennessee) Towns, White, Habersham

2016 Seed Grant Focus Areas

Redundancy and Emergency Interconnectivity Data collection Analyse and map existing interconnections Develop interconnection projects Collected data, pipes, water mains, water treatment plan capacities, permit limits, water availability. Demand – current (2010) and 2050 – from Regional Water Plan Red dots are existing; orange are proposed.

Redundancy and Emergency Interconnectivity Meeting existing and future demand – 2015 Results Compare existing and future (2050) demand of Annual Average Day demand with water availability Findings from 2015 included Calhoun’s current supplies would not meet 2050 demand Focus Area results: System Annual Average Day – 2010 Demand Annual Average Day – 2050 Demand Chatsworth  Dalton Rome Calhoun X For purposes of interconnection plan, we assume that Calhoun will expand or build new water treatment facility to meet demand. [MJHV note for next week: combine and summarize these 3 slides – results from last phase more succinctly]

Redundancy and Emergency Interconnectivity 2015 Results - Reliability Targets and Emergency Scenarios Emergency Scenarios: Failure of largest treatment facility within a Partnership member’s system Short-term catastrophic failure of distribution system Short-term contamination of a water supply system Short-term contamination of a raw water source Reliability Targets 100% Annual Average Day Demand 65% Annual Average Day Demand 35% Annual Average Day Demand

Redundancy and Emergency Interconnectivity 2015 Results - Reliability Targets and Emergency Scenarios Maximum Deficit, for evaluated emergency planning scenarios: System 65% of Immediate Demand 35 % of Immediate Demand 65% of 2050 Demand 35% of 2050 Demand Chatsworth  Dalton 2.0 MGD Rome 2.5 MGD Calhoun Dalton and Rome: Minor shortfalls would occur if 1. Failure of largest water treatment facility or 2. Short-term failure of water distribution system.

Redundancy and Emergency Interconnectivity Potential additional projects and/or interconnections Estimate costs for interconnections Red dots are existing; orange are proposed.

Redundancy and Emergency Interconnectivity Range of cost ~$10,000 to $230,000 based on length Proposed projects and estimated costs

Redundancy and Interconnectivity: Implementation Project in process/completed: Dalton – Chatsworth Additional Connection 1400’ of 8” pipe on Sugar Creek Road Jacobs/AMEC Foster Wheeler recommended project – City of Chatsworth had already initiated work, came to same conclusion independently. Project cost was estimated ~ $200,000 Actual costs turned out to be lower, as per Chatsworth

Data Gathering Phase Submit Data: Public water system service areas Transmission mains Existing and proposed Interconnections Raw water intake and treatment plant locations Distribution system tank locations Pressure zone boundaries and hydraulic grade Planned capital improvements that affect interconnection/transmission capacity Each phase take about 6-9 months, but could be delayed due to budget concerns.

Comments, Questions and Discussion Michelle Vincent, Jacobs and Tanya Kinnard, Amec Foster Wheeler