Final engineering report : final draft Rocky Boy's/North Central Montana Regional Water System

2004·12.5 MB·English

by  Chippewa-Cree Indians of the Rocky Boy's Reservation, Montana

s
628.144 MontanaStateLibrary
N7FER
2004 3 0864 1003 1318
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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
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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
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Digitized by the Internet Archive
2015
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https://archive.org/details/finalengineering2004mseh
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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
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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
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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
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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
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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
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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
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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
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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
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