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Conjunctive Water Resource Management Technical Data Report-Volume I

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Conjunctive Water Resource Management Technical Data Report-Volume I Conjunctive Water Resource Management Technical Data Report-Volume I Colorado Prepared for the New Mexico/Texas Water Commission June 1994 BOI,ILE Engineering-Science, Inc. Conjunctive Water Resource Management and Aquifer Restoration Study for New Mexico/Texas Water Commission Revised - 1116/95 Table of Contents Executive Summary ................................................................... 1 Introduction ............................................................................... 7 Purpose of the Study ........................................................... 7 Study Area .......................................................................... 7 Historic Perspective ............................................................ 7 EI Paso's Water Supply ....................................................... 9 Subject of the Study for Phases II and m........................... 12 General Methods Applied .................................................. 13 Approach .......................................................................... 14 Data Collection ....................................................................... 15 Base Map ......................................................................... 15 Water Budget .................................................................... 15 Water Demand .................................................................. 18 Conveyance, Treatment and Distribution ........................... 18 Alternative Objectives ............................................................. 19 Alternative Objective 1 ...................................................... 19 Alternative Objective 2 ...................................................... 19 Alternative Objective 2a .................................................... 20 Alternative Objective 3 ...................................................... 22 Physical Attributes of Conceptual Alternatives .................. 22 Capital Cost Estimates .................................. , ................... 42 Water Conveyance Costs ................................................... 50 Regional Water Treatment Plants ............................................ 54 Rio Grande Project Water Supply...................................... 54 Future Population and Water Demand ............................... 54 Estimation of Ultimate Demand ......................................... 60 Treatment Processes .......................................................... 61 Raw Water Quality ........................................................... 62 Treatment Water Quality Goals ......................................... 64 Regulatory Objectives ....................................................... 64 Policy Objectives .............................................................. 70 Process Selection .............................................................. 71 Estimation of Treated Storage Capacity ............................. 72 Distribution System Development ................................... '" 72 Las Cruces Regional Treatment Plant and Distribution System ......................................................................................... 72 Phased Development Plan for Las Cruces .......................... 78 Anthony Regional Treatment Plant and Distribution System84 Distribution System ........................................................... 86 Phased Development Plan for Anthony .............................. 88 Water Budget Analysis ............................................................ 96 Introduction ...................................................................... 96 Methodology ..................................................................... 97 Results ............................................................................ 101 Additional Considerations ...................................................... 113 Canal and Drain Storage ................................................. 113 Return Flow Treatment ................................................... 117 Aquifer Storage and Recovery ......................................... 119 Drought Contingency ....................................................... 122 Environmental Considerations ......................................... 124 Swnmary of Study Results .................................................... 126 Alternative Objective No.1 ............................................. 128 Alternative Objective No.2 ............................................. 128 Alternative Objective No.3 ............................................. 129 Costs .............................................................................. 130 Water Budget Analysis .................................................... 131 Surface Water Loss Evaluation ....................................... 135 Summary of Aquifer Effects .......................................... ,. 135 List of References .................................................................. 142 Technical Appendices ............................................................ 145 A. Study Criteria Memorandum ...................................... 145 B. Cost Memorandum ..................................................... 145 C. Calculations ............................................................... 145 D. Water Budget Spreadsheet .......................................... 153 List of Figures 1 Hueco Basin Aquifer Depletion 2 Canal Cross Section for Alternative 1 3 Routesfor Alternatives 1, 2, and 3 4 Typical Siphon River Crossing 5 Typical Check Structure 6 Typical Check Structure Sections 7 Typical Turnout 8 Typical Turnout Sections 9 Alternative 1 Flow Diagram for Year 2005 10 Alternative I Flow Diagram for Year 2015 11 Alternative 1 Flow Diagram for Year 2035 12 Canal Cross Section for Alternative 2 13 Alternative 2 Flow Diagram for Year 2005 14 Alternative 2 Flow Diagram for Year 2015 15 Alternative 2 Flow Diagram for Year 2035 16 Dual Canal Section for Alternative 2a 17 Alternative 2a Flow Diagram for Year 2005 18 Alternative 2a Flow Diagram for Year 2015 19 Alternative 2a Flow Diagram for Year 2035 20 Alternative 3 Flow Diagram for Year 2005 21 Alternative 3 Flow Diagram for Year 2015 22 Alternative 3 Flow Diagram for Year 2035 23 Las Cruces Water Treatment Plant Region 24 AnthonyTreatment Plant Region 25 Dona Ana County Census Division 26 Treatment Plant Process Flow Diagram 27 Las Cruces Water Treatment Plant Treated Reservoir Service areas 28 Las Cruces Water Treatment Plant and 2015 Distribution System 29 Las Cruces Water Treatment Plant and 2005 Distribution System -------- 30 Las Cruces Water Treatment PIant and Ultimate 2035 System 31 Las Cruces Water Treatment Plant and Ultimate Distribution System 32 Anthony Water Treatment PIant Treated Reservoir Service Areas 33 Anthony Water Treatment Plant and 2015 Distribution System 34 Anthony Water Treatment Plant and 2005 Distribution System 35 Anthony Water Treatment Plant and 2035 Distribution System 36 Anthony Water Treatment PIant and Ultimate Distribution System 37 Water Budget - Baseline 38 Total Dissolved Solids (TOS) Mass Budget - Baseline 39 Water Budget - Alternative 1 40 Total Dissolved Solids (TOS) Mass Budget - Alternative 1 41 Water Budget - Alternative 2 42 Total Dissolved Solids (TOS) Mass Budget - Alternative 2 43 Water Budget - Alternative 3 44 Total Dissolved Solids (TOS) Mass Budget - Alternative 3 45 Regulating Storage Reservoirs 46 Service Fields of Alternatives 47 Mesilla Basin Loss Rate vs. Time 48 Hueco Basin Loss Rate vs. Time Tables I Capital Cost for Alternative I 2 Capital Cost for Alternative 2 3 Capital Cost for Alternative 2a 4 Capital Cost for Alternative 3 5 Water Conveyance Unit Cost 6 Annual Water Conveyance Cost 7 Mesilla Valley Population, New Mexico 8 Mesilla Valley Population, Texas 9 Water Treatment Plant Region Populations 10 Mesilla Valley Projected Daily per Capita Water Use II Regional Water Treatment Plant Capacities 12 Water Quality in Caballo Reservoir Releases 13 Current and Expected SDWA Requirements 14 Average and Maximum Daily Demands for Las Cruces 15 Construction Cost for Las Cruces, 2015 16 Construction Cost for Las Cruces, 2035 17 Average and Maximum Daily Demands for Anthony Plant 18 Construction Costs for Anthony, 2015 19 Construction Costs for Anthony, 2035 20 Regulatory Reservoirs Description 21 Capital and Conveyance Cost 22 Water Treatment Plant Costs 23 Water Budget Sununary 24 Mass Budget Sununary 25 River Flow and Quality at Key Locations 26 Surface Water Loss Analysis for Average Year Acronyms and Definitions af - acre feet af/yr - acre feet per year AquiferlBasinlBolson used interchangeably acequias - irrigation canals, laterals, ditches. cfs - cubic feet per second New Mexicoffexas Water Commission (Commission) EBID - Elephant Butte Irrigation District EDR - Electric Dialysis Reversal EPCWID# I - EI Paso County Water Improvement District No. 1 EPWU - EI Paso Water UtilitiesJPublic Service Board gpcd - gallons per capita per day mwc - International Boundary and Water Commission M&I - Municipal and Industrial mCilday - micro-Couries per day MCL - maximum contaminant level MCLg - maximum contaminant level goal MG - million gallons mg/L - milligrams per liter MGD - million gallons per day . NTU - nephelometric turbidity unit RGP - Rio Grande Project RO - Reverse Osmosis SDWA - Safe Drinking Water Act TDS - total dissolved solids TOe - total organic carbon USBR - United States Department of the Interior, Bureau of Reclamation USGS - United States Geologic
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