Figure 1 Demands on Lake Athens

Transcription

1 Table 1 Projected Demands for Athens MWA and Lake Athens Water User Group Demand on Lake Athens Comments City of Athens 2,326 2,832 3,431 4,111 5,003 6,108 Henderson Co. Irrigation Local irrigation at lake Henderson County Livestock 3,023 3,023 3,023 3,023 3,023 3,023 Fish Hatchery Henderson County Manufacturing (60% - Reg C) Total Demand 5,574 6,090 6,703 7,399 8,308 9,433 Future Customers Henderson County Manufacturing Total Demand Current and Future 5,607 6,125 6,743 7,444 8,360 9,492 Figure 1 Demands on Lake Athens 10,000 Acre-Ft/Year 8,000 6,000 4,000 2,000 Hatchery Athens MWA

2 Table 2 Currently Available Supplies and Demands for Athens MWA and Lake Athens - Values in Acre-Feet per Year - Source Currently Available Supplies Lake Athens (firm yield) 6,064 5,983 5,903 5,822 5,741 5,660 Lake Athens (safe yield) 5,172 5,084 4,996 4,908 4,820 4,730 Lake Athens (operational yield) 2,900 2,900 2,900 2,900 2,900 2,900 Reuse (limit- 2,677) Total Supplies (Limited by constraints) 2,900 2,900 2,900 2,900 2,900 2,900 Projected Demands 5,607 6,125 6,743 7,444 8,360 9,492 Projected Surpluses or (Shortages) (2,707) (3,225) (3,843) (4,544) (5,460) (6,592) Figure 2 Supply and Demands on Lake Athens 10,000 Acre-Ft/Year 8,000 6,000 4,000 2,000 Lake Athens Demands

3 Strategy Quantity (Ac- Ft/Yr) Capital Cost Table 3 Summary of Costs and Impacts of Potentially Feasible Strategies for Athens MWA and Lake Athens Unit Cost ($/kgal.) Pre-Amort. Post-Amort. Reliability Environmenta l Factors Agricultural/ Rural Impacts Other Natural Resources 3rd Party Impacts Key Water Quality Parameters Temporary Pumping for Fish Hatchery 1,500 $432,500 $0.14 NA High Low Low Low Medium low Low Indirect Reuse 2,677 $3,601,700 $0.48 $0.18 High Low Low Low Low Medium low Forest Grove (all to Lake) 4,500 $6,105,700 $0.41 $0.11 High Medium low Low Low Positive Medium low Forest Grove (split to Lake and City) 4,500 $5,696,900 $0.38 $0.10 High Medium low Low Low Positive Medium low Palestine 4,000 $9,361,100 $0.80 $0.28 High Low Low Low Low Low Dallas 4,000 $1,333,125 $0.50 $0.42 High Low Low Low Medium low Low 5 MGD New WTP at Lake $17,476,500 $1.84 $0.44 High Low Low Low Low Low 1.5 MGD WTP Expansion at Lake $4,150,100 $1.50 $0.40 High Low Low Low Low Low 3.5 MGD New WTP at City $11,423,800 $1.65 $0.35 High Low Low Low Low Low Implementation Issues Requires change in permitted use and agreement with TXU Requires change in permitted use and agreement with TXU Requires contract with UNRMWA Requires contract with DWU Comments May impact recreational use Will improve property values around lake. Will improve property values around lake.

4 12,000 Figure 3 Athens MWA 10,000 Forest Grove w/ Trmt at City 8,000 Forest Grove w/ Add. Trmt at Lake Acre-ft/year 6,000 4,000 Forest Grove raw water Temporary pump Reuse Conservation Lake Athens Demand 2,

5 Table 4 Recommended Water Management Strategies for Athens MWA that Provide Additional Water Supply Source Existing Supplies Lake Athens 2,900 2,900 2,900 2,900 2,900 2,900 Water Management Strategies Conservation Reuse 1,662 1,966 2,325 2,677 2,677 2,677 Temporary pump 1,500 Forest Grove raw water 0 2,000 1,660 1,660 1,660 1,660 Forest Grove w/ Add. Trmt at Lake Forest Grove w/ Trmt at City 2,000 2,000 Total Supplies from Strategies 3,187 4,160 5,171 5,646 7,786 7,967 Total Supplies 6,087 7,060 8,071 8,546 10,686 10,867 Total from Conservation and Reuse 1,687 2,160 2,671 3,146 3,286 3,467 Percent of Supplies from Conservation and Reuse 27.7% 30.6% 33.1% 36.8% 30.8% 31.9% Demand 5,607 6,125 6,743 7,444 8,360 9,492 Surplus or (Shortage) ,328 1,102 2,326 1,375 Table 5 Summary of Costs for Recommended Water Management Strategies Quantity Capital cost Annual Cost Cost/Ac-ft Raw Water $/1,000 gal Treated $/1,000 gal Reuse 2,677 $3,601,700 $418,718 $156 $0.48 Forest Grove (split to Lake and City) 4,500 $5,696,900 $559,500 $124 $ MGD Expansion at Lake 840 $4,150,100 $411,700 $490 $ MGD New WTP at City 1,960 $11,423,800 $1,053,400 $537 $1.65 Total $24,872,500

6 Probable Owner: Athens MWA Amount: 2,677 Acre-Feet/Year 2.4 MGD design TRANSMISSION FACILITIES Table A-1 Athens MWA Reuse Pipeline Size Quantity Unit Unit Price Cost Pipeline Urban 12 in. 19,000 LF $42 $798,000 Pipeline Urban 10 in. 23,800 LF $36 $856,800 Right of Way Easements (Rural) 0 ft. 0 Acre $3,000 $0 Right of Way Easements (Urban) 20 ft. 10 Acre $30,000 $300,000 Engineering and Contingencies (30%) $496,000 Subtotal of Pipeline $2,450,800 Pump Station(s) Pump Station at West WWTP 50 HP 1 EA $400,000 $400,000 Pump Station at North WWTP 100 HP 2 EA $620,000 $1,240,000 Engineering and Contingencies (35%) $574,000 Subtotal of Pump Station(s) $974,000 Permitting and Mitigation 1 LS $32,900 CONSTRUCTION TOTAL $3,457,700 Interest During Construction (12 months) $144,000 TOTAL CAPITAL COST $3,601,700 ANNUAL COSTS -RAW WATER Debt Service (6% for 30 years) $261,660 Raw water purchase NA Electricity ($0.06 kwh) $88,000 Facility Operation & Maintenance $69,058 Total Annual Costs $418,718 UNIT COSTS (During Amortization) Per Acre-Foot of raw water $156 Per 1,000 Gallons of raw water $0.48 UNIT COSTS (After Amortization) Per Acre-Foot of raw water $59 Per 1,000 Gallons of raw water $0.18

7 Probable Owner: Athens MWA Amount: 4,500 Acre-Feet/Year 5 MGD design Table A-2 Obtain Water from Forest Grove Reservoir and Transport All to Lake Athens TRANSMISSION FACILITIES Pipeline Size Quantity Unit Unit Price Cost Pipeline Rural 24 in. 41,560 LF $66 $2,743,000 Pipeline Urban 24 in. 2,000 LF $99 $198,000 Right of Way Easements (Rural) 30 ft. 29 Acre $3,000 $87,000 Right of Way Easements (Urban) 30 ft. 1 Acre $30,000 $30,000 Engineering and Contingencies (30%) $882,000 Subtotal of Pipeline $3,940,000 Pump Station(s) Intake and Pump Station - FG 290 HP 1 EA $1,200,000 $1,200,000 Engineering and Contingencies (35%) $420,000 Subtotal of Pump Station(s) $1,620,000 Permitting and Mitigation 1 LS $49,700 CONSTRUCTION TOTAL $5,609,700 Interest During Construction (18 months) $346,000 Permitting associated with Water Rights Transfer $150,000 TOTAL CAPITAL COST $6,105,700 ANNUAL COSTS RAW WATER Debt Service (6% for 30 years) $443,572 Raw water purchase $0 Electricity ($0.06 kwh) $90,000 Facility Operation & Maintenance $71,300 Total Annual Costs $604,872 UNIT COSTS (During Amortization) Per Acre-Foot of raw water $134 Per 1,000 Gallons of raw water $0.41 UNIT COSTS (After Amortization) Per Acre-Foot of raw water $36 Per 1,000 Gallons of raw water $0.11

8 Table A-3 Obtain Water from Forest Grove Reservoir and Transport Portion to Lake Athens/ Transport Portion to New WTP Near Athens Probable Owner: Athens MWA Amount: 4,500 Acre-Feet/Year 5.8 MGD design Raw water to Lake Athens 2500 ac-ft/yr 2.79 MGD design Raw water to City 2000 ac-ft/yr 3.57 MGD design TRANSMISSION FACILITIES Pipeline Size Quantity Unit Unit Price Cost Pipeline Rural 24 in. 13,500 LF $66 $891,000 Pipeline Rural 18 in. 29,500 LF $42 $1,239,000 Pipeline Urban 18 in. 4,400 LF $63 $277,200 Right of Way Easements (Rural) 30 ft. 30 Acre $3,000 $90,000 Right of Way Easements (Urban) 30 ft. 3 Acre $30,000 $90,000 Engineering and Contingencies (30%) $722,000 Subtotal of Pipeline $3,309,200 Pump Station(s) Intake and Pump Station 360 HP 1 EA $1,400,000 $1,400,000 Engineering and Contingencies (35%) $490,000 Subtotal of Pump Station(s) $1,890,000 Permitting and Mitigation 1 LS $25,700 CONSTRUCTION TOTAL $5,224,900 Interest During Construction (18 months) $322,000 Permitting associated with Water Rights Transfer $150,000 TOTAL CAPITAL COST $5,696,900 ANNUAL COSTS RAW WATER Debt Service (6% for 30 years) $413,900 Raw water purchase $0 Electricity ($0.06 kwh) $78,000 Facility Operation & Maintenance $67,600 Total Annual Costs $559,500 UNIT COSTS - (During Amortization) Per Acre-Foot of raw water $124 Per 1,000 Gallons of raw water $0.38 UNIT COSTS - (After Amortization) Per Acre-Foot of raw water $32 Per 1,000 Gallons of raw water $0.10

9 Probable Owner: Athens Fish Hatchery Quantity: 1,500 AF/Y 1.67 MGD TRANSMISSION FACILITIES Table A-4 Henderson County Livestock Additional Use from Lake Athens through Temporary Pumping Pipeline Size Quantity Unit Unit Price Cost Pipeline Rural 16 in. 5,000 LF $34 $170,000 Pipeline Urban 16 in. 0 LF $0 Right of Way Easements Rural (ROW) 0.0 ACRE $2,000 $0 Right of Way Easements Urban (ROW) 0.0 ACRE $20,000 $0 Engineering and Contingencies (30%) $51,000 Subtotal of Pipeline $221,000 Pump Station(s) Temporary Lake Pump 10 HP 1 LS $150,000 $150,000 Booster Pump Station 0 HP 1 LS $0 $0 Engineering and Contingencies (35%) $52,500 Subtotal of Pump Station(s) $202,500 Ground Storage Ground Storage Tanks at Booster 0.00 MG 0 LS $0 $0 Engineering and Contingencies (35%) $0 Subtotal of Ground Storage $0 Surface Water Treatment Water treatment plant 0 MGD 0 LS $0 $0 CONSTRUCTION TOTAL $423,500 Permitting and Mitigation $0 Interest During Construction (6 months) $9,000 TOTAL COST $432,500 ANNUAL COSTS Debt Service (6% for 10 years) $59,000 Electricity ($0.06 kwh) $3,000 Operation & Maintenance $7,000 Raw Water Purchase Kgal $0.00 $0 Treatment Kgal $0.00 $0 Total Annual Costs $69,000 UNIT COSTS (During Amortization) Per Acre-Foot of treated water $46 Per 1,000 Gallons $0.14

10 Table A MGD Water Treatment Plant Expansion at Lake Athens Probable Owner: Athens MWA Amount: 840 Acre-Feet/Year Expansion at Lake Athens 840 ac-ft/yr 1.5 MGD design Pump Station(s) Expand intake at Athens by 1.5 MGD 1 LS $150,000 $150,000 Engineering and Contingencies (35%) $53,000 Subtotal of Pump Station(s) $203,000 Permitting and Mitigation 1 LS $1,800 WATER TREATMENT FACILITIES Additional Treatment Capacity at Lake 1.5 MGD $2,775,000 Engineering and Contingencies (35%) $971,000 Subtotal of Treatment $3,746,000 Permitting of treatment plant $33,300 CONSTRUCTION TOTAL $3,984,100 Interest During Construction (12 months) $166,000 TOTAL CAPITAL COST $4,150,100 ANNUAL COSTS TREATED WATER Debt Service (6% for 30 years) $301,500 Electricity ($0.06 kwh) $9,900 Facility Operation & Maintenance $4,500 Water Treatment ($.35/1,000 gal finished water) 840 af/y $95,800 Total Annual Costs $411,700 UNIT COSTS (During Amortization) Per Acre-Foot of treated water $490 Per 1,000 Gallons of treated water $1.50 UNIT COSTS (After Amortization) Per Acre-Foot of treated water $131 Per 1,000 Gallons of treated water $0.40

11 Table A-6 Water Treatment Plant Expansion at Lake Athens - Forest Grove Option B Probable Owner: Athens MWA Amount: 1,960 Acre-Feet/Year New WTP at City 1,960 ac-ft/yr 3.5 MGD design WATER TREATMENT FACILITIES New Treatment Plant at City 3.5 MGD $7,900,000 Engineering and Contingencies (35%) $2,765,000 Subtotal of Treatment $10,665,000 Permitting of treatment plant $94,800 CONSTRUCTION TOTAL $10,759,800 Interest During Construction (18 months) $664,000 TOTAL CAPITAL COST $11,423,800 ANNUAL COSTS TREATED WATER Debt Service (6% for 30 years) $829,900 Electricity ($0.06 kwh) $0 Facility Operation & Maintenance $0 Water Treatment ($.35/1,000 gal finished water) 1960 af/y $223,500 Total Annual Costs $1,053,400 UNIT COSTS (During Amortization) Per Acre-Foot of treated water $537 Per 1,000 Gallons of treated water $1.65 UNIT COSTS (After Amortization) Per Acre-Foot of treated water $114 Per 1,000 Gallons of treated water $0.35