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(GP/GT) for Additional Water Supply in the Lower Rio Grande

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lli-9<br />

Comparative Assumed Input Inrormation - EDR versus RO<br />

EDR<br />

BQ<br />

Feedwater: <strong>Rio</strong> Ground <strong>Water</strong> <strong>Rio</strong> Ground <strong>Water</strong><br />

Reservoir<br />

Reservoir<br />

General Geographical Area: McA - HRL· HRL -BRO"<br />

Plant Capacity: 5.0 MGD 5.0 MGD<br />

Current Build<strong>in</strong>g Cost Index: 3,014 3,014<br />

Current Labor Cost Index: 4,720 4,720<br />

Interest Rate: 6.5% 6.5%<br />

Amortization Period: 20 years 20 years<br />

Cost of Electric Power from Grid: $0.071KWH $0.071KWH<br />

Length of Feedwater Pipel<strong>in</strong>e: 2 miles 2 miles<br />

Elevation of Desalt Plant: 57 ft. 30 ft.<br />

Elevation of Well Field: 57 ft. 30 ft.<br />

Well Pump<strong>in</strong>g Depth-Feedwater <strong>Supply</strong>: 220 ft. 220 ft.<br />

Well Depth - Br<strong>in</strong>e Disposal: 3,000 ft. 3,000 ft.<br />

Land Cost: $3,OOO/ac. $3,000/ ac.<br />

Right~f-Way Cost: $5, OOO/ac. $5,OOO/ac.<br />

<strong>Water</strong> Analysis:<br />

Total Dissolved Solids: 2,477 ppm 4,130 ppm<br />

SodiumIPotassium: 630 ppm 1,220 ppm<br />

Chloride: 454 ppm 1,250 ppm<br />

Calcium: 59 ppm 143 ppm<br />

Iron: 0.9 ppm 0.4 ppm<br />

Manganese:· < 1 ppm < 1 ppm<br />

Magnesium: 62 ppm 99 ppm<br />

Temperature: 800F 80"F<br />

Net Evaporation Rate: 40 <strong>in</strong>.lyr. 50 <strong>in</strong>.lyr.<br />

Goal: Product water of < 500 ppm Product water of < 500 ppm<br />

IDS<br />

IDS<br />

• McAllen to Harl<strong>in</strong>gen<br />

•• Harl<strong>in</strong>gen-Brownsville (west side)<br />

d:lld>lfjO'....u._

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