Union County, North Carolina Update of Wastewater Treatment Capacity Alternatives Evaluation for the Yadkin - Pee Dee Basin of Union County, NC Presented to Union County Board of Commissioners Presented by CH2M HILL Bob Forbes, PE March 1, 2007

Union County, North Carolina Agenda Project background Alternatives evaluation overview –Non-economic parameters –Economic parameters Summary Questions

Union County, North Carolina

WWTF Alt. 3A

Union County, North Carolina Basis for evaluation of alternatives Non-economic factors –NPDES permit factors –Institutional issues –Long-term suitability of WRF site –Other environmental factors Capital costs Site issues

Union County, North Carolina WWTF Alt. 3A Alt. 3A Route

Union County, North Carolina Non-economic comparison RANKING OF NON-ECONOMIC FACTORS FOR THE WRF ALTERNATIVES TO SERVE NORTHERN UNION COUNTY (each alternative scored on scale of 1 to 5 for each criterion, with 5 being best, then ranked in order of Total Score) WRF AlternativeNPDES Permit Factors Institu- tional Issues Long-term Suitability of WRF Site Other Envir. Factors Total Score RankRank Other Considerations 1 - WWTF near Rocky River and mouth of Crooked Creek Good NPDES conditions, near service area, but partially developed site (forest, farm & residential) 1A – WWTF near proposed Crooked Creek Pump Station with Rocky River discharge Good NPDES conditions, near western service area, but close to residential and rural neighborhoods. 2- WWTF near Rocky River and mouth of Grassy Creek Good NPDES conditions, near service area, mostly undeveloped site (forest & farmland). 2A – WWTF near State Hwy’s 218 & 200, discharge to Rocky River Good NPDES conditions, centrally-located, sparsely populated, large parcels available. 3- WWTF near Rocky River at Sugar&Wine Road Good NPDES conditions but farther from service area. Proposed site is mostly farmland. 3A – WWTF near Rocky River at State Hwy 742 Bridge Crossing Large, undeveloped parcels available and good NPDES conditions. Farther from initial service area, but could potentially serve more of the County by gravity.

Union County, North Carolina Non-economic comparison (cont.) RankRank RANKING OF NON-ECONOMIC FACTORS FOR THE WRF ALTERNATIVES TO SERVE NORTHERN UNION COUNTY (each alternative scored on scale of 1 to 5 for each criterion, with 5 being best, then ranked in order of Total Score) WRF AlternativeNPDES Permit Factors Institu- tional Issues Long-term Suitability of WRF Site Other Envir. Factors Total Score Other Considerations 4- LRR WRF on Rocky River near Richardson Creek in Anson County Good NPDES conditions, much farther from service area, undeveloped site in Anson County 5- WRF on Richardson Creek at Salem Creek in Union County Difficult NPDES conditions (discharge to small creek, upstream WS and WWTP), close to service area, partially developed site 5A – WRF on Richardson Creek near Anson County line, discharge to RR Good NPDES conditions, near eastern service areas, but close to residential neighborhoods and smaller land lots. 6- Transfer wastewater to Twelve Mile Creek WRF Difficult NPDES conditions (discharge to small creek, existing WWTP), far from service area, partially developed site. 7- Transfer WW to CMUD McAlpine Creek WWTP Moderate NPDES conditions, farther from service area in Mecklenburg County, question of available capacity 8 – Transfer WW to Anson County WRF on Pee Dee River Best NPDES conditions, farthest from service area in Anson County, undeveloped site

Union County, North Carolina Cost Comparison – First 8 Alternatives TABLE 2 Summary of Potential Costs in Million Dollars (first eight alternatives, increased from 5 MGD to 6 MGD capacity in initial phase, decreased from 10 MGD to 9 MGD expansion capacity in 2 nd phase, and updated from March 2004 to November 2006 dollars) Initial Phase for 6 MGDAlt#1Alt#2Alt#3Alt#4Alt#5Alt#6Alt#7Alt#8 Force Main Costs$12.6M$14.2M$17.6M$29.0M$22.4M$44.3M$59.5M$53.1M Pump Station Costs$4.3M $6.4M Collection System Costs$26.7M 6 MGD ADF WRF Capacity$47.8M $37.5M$47.8M Initial Phase Capital Costs$91M$93M$96M$110M$103M$125M$130M$134M Ultimate Build Out-15 MGD Force Main Capacity Expansion (Booster Pump Stations) None $3.4M.$6.8M$3.4M Pump Station Capacity Expansion Cost $9.0M $14.1M Collection System Extension$26.7M 9 MGD ADF WWTF Capacity Expansion $71.6M Capacity Expansion Costs of Each Alternative $107M $112M $116M$119M$116M Ultimate Buildout Total$199M$200M$204M$222M$216M$241M$249M$250M

Union County, North Carolina Cost Comparison – Other 4 Alternatives TABLE 3 Summary of Potential Costs in Million Dollars (last four alternatives evaluated, with capacity increased from 5 MGD to 6 MGD in initial phase, decreased from 10 MGD to 9 MGD in 2nd phase, and updated from March 2004 to November 2006 dollars) Initial Phase for 6 MGDAlt#1AAlt#2AAlt #3AAlt#5A Force Main Costs$15.9M$16.0 M$24.0M$26.8M Pump Station Costs$4.3M Collection System Costs$26.7M 6 MGD ADF WWTF Capacity$47.8M Initial Phase Capital Costs$95M $103M$106M Ultimate Build Out for 15 MGD Force Main Capacity Expansion (Booster Pump Stations) None Pump Station Capacity Expansion Cost$9.0M Collection System Extension$26.7M 9 MGD ADF WRF Capacity Expansion$71.6M Capacity Expansion Costs of Each Alternative $107M Ultimate Buildout Total Costs$202M $210M$213M

Union County, North Carolina Evaluation Summary TABLE 4 SUMMARY RANKING OF NON-ECONOMIC FACTORS AND ESTIMATED COSTSFOR THE WRF ALTERNATIVES TO SERVE NORTHERN UNION COUNTY Alternative & DescriptionNon- economic Ranking Cost Ranking Total Score Overall Rank 1- LRR WRF on Rocky River near Crooked Creek A – WRF near proposed Crooked Creek Pump Sta. with discharge into Rocky River LRR WRF on Rocky River near Grassy Creek A – WRF near State Hwy’s 218 & 200, discharge to Rocky River LRR WRF on Rocky River at Sugar & Wine Road A – WWTF near Rocky River just downstream of State Hwy 742 Bridge Crossing LRR WRF on Rocky River near Richardson Creek in Anson County WRF on Richardson Creek at Salem Creek in Union County A – WRF on Richardson Creek near Anson County line, discharge to RR Transfer wastewater to Twelve Mile Creek WRF Transfer WW to CMUD McAlpine Creek WWTP – Transfer WW to Anson County WRF on Pee Dee River Non-economic rankings are from Table 1; cost rankings are in order of estimated costs (lowest to highest, from Tables 2 & 3), and the overall rankings of the 12 alternatives represent the sum of non-economic and cost rankings