s 628.144 MontanaStateLibrary N7FER 2004 3 0864 1003 1318 1 Final Engineering Report Regional Water System Prepared for North Central Montana Regional Water Authority And Chippewa-Cree Tribe Prepared by HDR Engineering Inc. P.O. Box 31318 3075 N Reserve St., Suite A Billings, MT 59107-1318 Missoula, MT 59808-1390 September 2004 MAY 3 0 2006 TABLE OF CONTENTS Page SUMMARY 1. 1-1 INTRODUCTION 2. 2-1 2.1 Statement ofPurpose 2-1 2.2 Statement ofScope 2-2 2.3 Definition ofTerms 2-2 2.4 Previous Studies/Reports 2-5 2.5 Existing Public Water Systems 2-9 2.5.1 Sources and Treatment 2-9 2.5.2 Water Quality 2-9 2.5.3 Ownership 2-9 2.6 Water Rights 2-9 2.7 Ownership 2-10 ECONOMIC AND ENVIRONMENTAL PRINCIPLES AND GUIDELINES 3. ANALYSES 3-1 3.1 Introduction 3-1 3.2 Alternative Plan Formulation 3-1 3.3 Municipal and Industrial (M&I) Evaluation Procedure 3-4 3.3.1 Identification ofthe Study Area 3-4 3.3.2 Future M&I Water Supplies 3-4 3.3.3 Future M&I Water Use 3-4 3.3.4 Deficit Between Future Water Supplies and Use 3-5 3.3.5 Alternative Without Federal Plan 3-5 3.3.6 Ranking ofAlternative Plans based on Least Cost 3-5 3.3.7 Identification ofthe Most Likely Alternative 3-6 3.3.8 Computation ofM&I Water Supply Benefits 3-7 3.3.9 Display 3-7 3.4 Accounts 3-7 3.4.1 Recommended Plan 3-7 DEMOGRAPHICS 4. 4-1 4. Historic Population and Growth Rates ofProject Area 4-1 1 4.2 Montana Indian Population and Growth Rates 4-1 4.3 Project Population Projection from 2000 Census 4-1 4.4 Historic Water Demands 4-4 5. DESIGN CRITERIA 5-1 5.1 Summary ofDesign Criteria 5-1 5.2 Water Use Design Criteria 5-2 5.2.1 Reservation Water Needs 5-2 5.2.2 Off-Reservation Water Needs 5-4 5.3 Physical Parameter Design Criteria 5-4 5.3.1 Pressures 5-6 5.3.2 Transmission Pipelines 5-7 5.3.3 Pumping Stations 5-7 5.3.4 Storage 5-7 5.3.5 Reservation Transmission System Sizing 5-8 - - i H:\06\M414130\FER.doc 09/22/04 @ 4:50 PM MAY 3 0 2006 Digitized by the Internet Archive 2015 in https://archive.org/details/finalengineering2004mseh 1 TABLE OF CONTENTS Page SUMMARY 1. 1-1 INTRODUCTION 2. 2-1 2.1 Statement ofPurpose 2- 2.2 Statement ofScope 2-2 2.3 Definition ofTerms 2-2 2.4 Previous Studies/Reports 2-5 2.5 Existing Public Water Systems 2-9 2.5.1 Sources and Treatment 2-9 2.5.2 Water Quality 2-9 2.5.3 Ownership 2-9 2.6 Water Rights 2-9 2.7 Ownership 2-10 ECONOMIC AND ENVIRONMENTAL PRINCIPLES AND GUIDELINES 3. ANALYSES 3-1 3.1 Introduction 3-1 3.2 Alternative Plan Formulation 3-1 3.3 Municipal and Industrial (M&I) Evaluation Procedure 3-4 3.3.1 Identification ofthe Study Area 3-4 3.3.2 Future M&I Water Supplies 3-4 3.3.3 Future M&I Water Use 3-4 3.3.4 Deficit Between Future Water Supplies and Use 3-5 3.3.5 Alternative Without Federal Plan 3-5 3.3.6 Ranking ofAlternative Plans based on Least Cost 3-5 3.3.7 Identification ofthe Most Likely Alternative 3-6 3.3.8 Computation ofM&I Water Supply Benefits 3-7 3.3.9 Display 3-7 3.4 Accounts 3-7 3.4.1 Recommended Plan 3-7 DEMOGRAPHICS 4. 4-1 4.1 Historic Population and Growth Rates ofProject Area 4-1 4.2 Montana Indian Population and Growth Rates 4-1 4.3 Project Population Projection from 2000 Census 4-1 4.4 Historic Water Demands 4-4 5. DESIGN CRITERIA 5-1 5.1 Summary ofDesign Criteria 5-1 5.2 Water Use Design Criteria 5-2 5.2.1 Reservation Water Needs 5-2 5.2.2 Off-Reservation Water Needs 5-4 5.3 Physical Parameter Design Criteria 5-4 5.3.1 Pressures 5-6 5.3.2 Transmission Pipelines 5-7 5.3.3 Pumping Stations 5-7 5.3.4 Storage 5-7 5.3.5 Reservation Transmission System Sizing 5-8 - i - H:\06\M414130\FER.doc 09/22/04 @ 4:50 PM WATER SUPPLY AND TREATMENT 6. 6-1 6.1 Introduction 6-1 6.2 Basis ofDesign 6-1 6.2.1 Water Production Requirements 6-1 '. 6.2.2 Water Treatment Components 6-2 6.2.3 Water Quality Goals 6-3 6.3 Raw Water Quality and Finished Water Goals 6-4 6.3.1 Water Quality Data 6-4 6.3.2 Current Regulations 6-9 6.3.3 Future Regulations 6-15 6.3.4 Regulatory Schedule 6-17 6.3.5 Expected Future Regulatory Impacts and Concerns 6-17 6.3.6 Additional Water Quality Data Needed and Summary of Regulatory Impacts 6-19 6.4 Intake and Pump Station 6-19 6.4.1 Alternative 1 Dry Tap 6-21 A 6.4.2 Alternative Microtunneling 6-22 1 6.4.3 Alternative ID Directional Drilling 6-30 6.5 Water Treatment Plant 6-30 6.5.1 Raw Water Storage/Presedimentation 6-33 6.5.2 Pretreatment 6-33 6.5.3 Filtration 6-40 6.5.4 Clearwell 6-44 6.5.5 Disinfection 6-45 6.5.6 Eligh Service/Backwash Pumping 6-48 6.5.7 Chemical Facilities 6-51 6.5.8 Residual Handling Facilities 6-54 6.5.9 Site Layout and Support Facilities 6-55 6.6 Estimated Cost 6-59 6.7 Construction Phasing 6-60 6.8 Additional Technical Investigations 6-61 6.8.1 Pilot Testing 6-62 6.8.2 Geotechnical Investigation 6-63 6.8.3 Topographic Survey 6-63 6.8.4 Real Estate or Easement Acquisition 6-64 PIPELINES, PUMPING, AND STORAGE 7-1 7. 7.1 Introduction 7-1 7.2 Disposition ofVE Proposals and Items for Further Study 7-1 7.3 Discussion ofGeneral Design Methodology 7-3 7.3.1 Sizing 7-3 7.3.2 Pipe Material and Corrosion Protection 7-4 7.3.3 Crossings/Land Acquisition 7-4 7.3.4 Appurtenances 7-5 7.3.5 Pumping Stations 7-6 7.3.6 Storage 7-6 7.4 Pipeline, Pumping, and Storage System Costs 7-7 7.4.1 Pipeline Unit Prices 7-7 7.4.2 Pumping Station Unit Costs 7-7 - ii - H:\06\M414130\FER.doc 09/22/04 @4:50 PM 1 7.4.3 Storage Tank Unit Costs 7-7 7.5 Description ofthe Proposed System 7-12 7.5.1 Core System 7-12 7.5.2 Non-Core System 7-17 PROJECT COST SUMMARY 8. 8-1 8.1 Project Cost Summary 8-1 8.2 Major Contract Items 8-3 8.2. Supervisory Control and Data Acquisition (SCADA) 1 Instrumentation 8-4 8.2.2 Electrical Distribution 8-5 8.2.3 Maintenance Equipment 8-5 8.3 Non-Contract Costs 8-6 8.3.1 Design 8-6 8.3.2 Design Surveys and Geotechnical 8-6 8.3.3 Environmental 8-7 8.3.4 Construction Administration 8-7 TERO 8.3.5 Construction / Training / 8-7 8.3.6 Construction Administration / Reclamation 8-8 8.4 Source ofFunds 8-9 CONSTRUCTION SCHEDULE 9. 9-1 9.1 Construction by Project Segment 9-3 9.2 Activities in Advance ofEach Year’s Construction 9-4 ' 9.2.1 Preliminary Route 9-6 9.2.2 Permission to Survey and Easement Acquisition: Rocky Boy's Indian Reservation 9-6 9.2.3 Permission to Survey and Easement Acquisition: North Central Montana Rural Water System Authority 9-9 9.2.4 Surveys and Investigations for Engineering, Cultural Resource and Hazardous Waste Purposes 9-9 9.2.5 Permitting 9-10 9.2.6 Design, Design Review and Plan Amendment 9-10 9.2.7 Period ofAdvertisement, Bid Opening, Notice ofAward and Notice to Proceed 9-10 10. OPERATION, MAINTENANCE, AND REPLACEMENT COSTS 10-1 10. 1 Electrical Power Source 10- 10.2 Chemicals 10-1 10.3 Replacement ofSystem Components 10-6 10.4 Labor Costs 10-6 10.5 Operation and Maintenance Manual 10-6 10.6 Operation, Maintenance, and Replacement Responsibilities 10-7 - iii - H:\06\M414130\FER.doc 09/22/04 @ 4:50 PM 1 LIST OF FIGURES Figure 1-1 North Central Montana Regional Water System Components 1-2 Figure 6-1 Water Treatment Plant Schematic 6-5 Figure 6-2 Tiber Locations 6-6 Figure 6-3 Maximum and Average Turbidity for Tiber Reservoir Sampling Locations 6-8 Figure 6-4 Proposed Intake/ Pump Station 6-23 Figure 6-5 Preliminary Pump Station Layout 6-25 Figure 6-6 Proposed Intake Pump Station Site 6-27 Figure 6-7 Plant Flow Schematic 6-31 Figure 6-8 Proposed Site Plan 6-32 Figure 6-9 Conventional Sedimentation Basin 6-34 Figure 6-10 Plate Settling Alternative 6-36 Figure 6-1 Actiflow Sedimentation Basin 6-38 1 Figure 6-12 Lower Level Filter Building Plan 6-42 Figure 6-13 Clearwell Schematic 6-46 Figure 6-14 High Service Pump Station 6-49 Figure 6-15 Recovery Pump Station 6-56 Figure 7-1 Pump Station Cost Curve (0-81 hp Stations) (October 2002 Costs) 7-9 Figure 7-2 Pump Station Cost Curve (1000 - 7000 gpm) (October 2002 Costs) 7-10 Figure 7-3 Concrete Storage Reservoir Costs (October 2002 Costs) 7-1 Figure 7-4 Regional Water System Components 7-13 Figure 7-5 Core Branch ofthe Water Transmission System 7-14 Figure 7-6 Non-Core Branch ofthe Water Transmission System 7-18 Figure 7-7 Rocky Boy's Indian Reservation Core and On-Reservation Water System 7-19 LIST OF TABLES Table 1-1 Project Summary Recommended Plan 1-4 Table 2-1 DEQ Current and Future Compliance Concerns 2-11 Table 3-1 Service Area Alternatives from 1997 Appraisal Study 3-2 Table 3-2 Comparison ofRaw Water Sources 3-3 Table 3-3 Ranking ofAlternative Plans 3-6 Table 3-4 Environmental Quality Account 3-8 Table 3-5 Other Social Effects 3-9 Table 4-1 Census Counts, North Central Montana Counties 4-2 Table 4-2 Population and Growth Rate ofMontana Indians 4-2 Table 4-3 Population Projections 4-3 Table 4-4 Historic Water Demands 4-5 Table 5-1 Design Criteria for the Final Engineering Report 5-1 Table 5-2 Future Reservation Demands 5-3 Table 5-3 North Central System Community Demands 5-5 Table 6-1 Total Organic Carbon (TOC) Concentrations at Sample Point T5 (mg/L) 6-7 - iv - H:\06\M414130\FER.doc 09/03/04 @ 2:07 PM Table 6-2 Total Organic Carbon (TOC) Removal Requirements 6-13 Table 6-3 EPA Proposed Bins for Treatment Requirements Based on Cryptosporidium Concentration 6-16 Table 6-4 Current and Future Safe Drinking Water Act (SDWA) Regulation Summary 6-18 Table 6-5 Raw Water Quality Sampling Parameters and Frequency 6-20 Table 6-6 Proposed Intake/Pump Station Site 6-21 Table 6-7 Raw Water Pumps 6-28 Table 6-8 Design Criteria for Pretreatment Alternatives 6-39 Table 6-9 Pretreatment Alternative Capital Costs 6-40 Table 6-10 Design Criteria for Filter System 6-41 Table 6-1 Design Criteria for Disinfection 6-48 1 Table 6-12 High Service Pumps 6-50 Table 6-13 Chemical Feed Summary Table 6-52 Table 6-14 Estimated Opinion ofRaw Water Intake, Pump Station, and Water Treatment Plant Capital Costs 6-60 Table 6-15 Example - Phased Construction Strategy 6-61 Table 7-1 Summary ofUnit Pipe Costs 7-8 Table 7-2 Summary ofTotal Pipe Lengths 7-15 Table 7-3 Summary ofTotal Pipe Costs 7-16 Table 7-4 Summary ofOn-Reservation Pumping Stations 7-20 Table 7-5 Summary ofOn-Reservation Storage Tanks 7-21 Table 7-6 Non-Core Pumping Station Summary 7-22 Table 7-7 Non-Core Storage Tank Summary 7-23 Table 8-1 Regional Water System Capital Costs 8-2 Table 8-2 Non-Contract Costs 8-4 Table 8-3 PL 107-331 Act of2002 and June 2004 FER Project Costs 8-10 Table 9-1 Construction Schedule 9-2 Table 9-2 Illustrative Schedule ofActivities in Advance ofConstruction Start 9-5 Table 10-1 Design Year Operations and Maintenance Costs 10-2 Table 10-2 Life Cycle Costs 10-3 Table 10-3 Off-Reservation Pumping Station, Water Treatment Plant, and Intake Power Requirement Summary 10-4 Table 10-4 On-Reservation Pumping Station Power Requirement Summary 10-5 - v - H:\06\M414130\FER.doc 09/03/04 @ 2:13 PM