Table Of Content'
Final
Design Report
Remedial Action
Subarea wIrtI£ documents collect;CJ
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Streamside Tailings Operable Unit A,CN T rary
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Silver Bow Creek/Butte Area NPL Site HELENA’ M0NrANA 59520
Preparedfor:
Montana Department ofEnvironmental Quality
Mine Waste Cleanup Bureau
MT
Helena 59620
And
U.S. EnvironmentalProtection Agency
301 S. Park
Drawer 10096
MT
Helena 59626-0096
Preparedby:
Maxim Technologies, Inc. Inter-Fluve, Inc.
P.O. Box 4699 25 North Wilson, Suite 5
Helena Montana 59604 Bozeman Montana 59715
Bighorn Environmental Reclamation Research Unit
305 West Mercury 106 Linfleld Hall
Butte, Montana 59701 Montana State University
Bozeman, Montana 59717- 0290
June 1999
Approved: Date: l 9
Approved: Pat
c c c
Approved: Date: } ) ) }
Rosemary Rowe, Environmental Scientist, EPA, Region VIII
Digitized by the Internet Archive
2015
in
https://archive.org/details/streamsidetailin1999maxi
TABLE OF CONTENTS
1.0
Rage
INTRODUCTION
1
PURPOSE AND OBJECTIVES
1.1 1
1.2 SITE DESCRIPTION 2
.
1 .3 AGENCY DESIGN ACTIVITIES 5
1.3.1 Field Data Collection 5
1.3.2 Stream Channel Studies 7
1.3.3 Mine Waste Relocation Repository Alternatives Evaluation 8
1.3.4 Railroad Material Remediation Conceptual Design 9
2.0
1.3.5 Pilot Test 9
1.3.6 Material Procurement and Utility Relocation 10
1.4 REPORT ORGANIZATION 10
SUMMARY OF SELECTED DESIGN 11
GROUNDWATER DEWATERING
2.1 11
2.2 STREAM DIVERSION AND DEWATERING 12
2.3 TAILINGS/IMPACTED SOILS REMOVAL 12
2.4 IN-STREAM SEDIMENTS REMOVAL 13
2.5 CONSTRUCTION HAUL ROUTES 14
2.6 MINE WASTE RELOCATION REPOSITORY 14
2.7 LIME RESOURCES 15
3.1
2.8 CHANNEL AND STREAMBANKS RECONSTRUCTION 15
2.9 BRIDGES/STREAM CROSSINGS 16
2.10 BORROW AREA 17
2.1 1 FLOODPLAIN RECONSTRUCTION 17
2.12 REVEGETATION 17
2.13 RAILROAD MATERIALS REMEDIATION 18
3.2
3.0 REMEDIAL DESIGN ELEMENTS 19
GROUNDWATER DEWATERING
19
3.1.4 Design Components 20
3.1.4.1 Sediment Detention Ponds 20
3.1.4.2 Dewatering Trenches 20
STREAM DIVERSION AND DEWATERING 21
3.2.1 Objectives 21
3.2.2 Design Criteria 22
3.2.3 SupportingData 23
3.2.4 Design Components 23
3.2.4.1 Diversion and Diversion Channel 23
Diversion.Headworks 23
Diversion.Channel 24
Diversion Channel Lining 25
A
Piper rcb Culvert 26
Diversion Channel Outflow 26
3.2.4.2 Haul Road Crossings 26
i
TABLE OF CONTENTS (continued)
Page
3.2.4.3 Dewatering ofthe Existing Channel 27
3.2.4.4 Incidental Dewatering 27
3.3 TAILINGS/IMPACTED SOILS REMOVAL 27
28
3.3.2 Design Criteria 28
29
3.3.4 Design Components 29
3.3.4.1 Determination ofExcavation Surface 29
3.3.4.2 Determination ofOver-Excavation Factor 32
3.3.4.3 Verification ofTailings/Impacted Soils Removal 33
3.3.4.4 Determination ofSaturated Materials 33
3.3.4.5 Volume Determination 34
3.4 IN-STREAM SEDIMENTS REMOVAL 34
3.4.1 Objectives 34
3.4.2 Design Criteria 35
3.4.3 Supporting Data 35
3.4.4 Design Components 35
3.4.4.1 Excavation ofIn-Stream Sediments 35
3.4.4.2 Disposal and Treatment ofContaminated Sediments 36
3.5 37
37
37
37
38
3.5.4.1 Haul Road Design 38
3.5.4.2 Stream, Diversion Channel, and Utility Crossings 38
3.5.4.3 Traffic Control 39
3.6 MINE WASTE RELOCATION REPOSITORY 39
3.6.2 Siting and Design Criteria 40
3.6.3 Supporting Data 41
3.6.4 Design Components 41
3.6.4.1 Site Selection 41
3.6.4.2 Mine Waste Characteristics and Repository Capacity 42
3.6.4.3 Waste Handling, Amendment and Placement 43
3.6.4.4 Soil Cover 43
3.6.4.5 Erosion 44
3.6.4.6 Runon, Runoffand Sediment Control 44
3.6.4.7 Geotechnical Evaluation 44
3.6.4.8 Hydrogeology 45
3.6.4.9 Groundwater Quality 45
3.6.4.10 Access Road 45
3.6.4.11 Topography 45
3.6.4.12 End Land Use 45
li
TABLE OF CONTENTS (continued)
Eage
3.7 LIME RESOURCES 46
.
3.7.1 Objectives 46
3.7.2 Design Criteria 46
3.7.3 Supporting Data 47
3.7.4 Design Components 47
3.7.4.1 Lime Amendment Sources 47
3.7.4.2 Lime Amendment Quality and Quantity 47
3.7.4.3 Lime Application Rates 47
3.7.4.4 Lime Mixing Methods 50
General Lime Mixing 50
Lime Incorporation Methods 50
Liming ofTop Three Feet of Repository 50
Quality Assurance 50
3.8 CHANNEL AND STREAMBANKS RECONSTRUCTION 51
3.8.1 Objectives 51
3.8.2 Design Criteria 51
3.8.2.1 UpperSection ofReach A 52
3.8.2.2 LowerSection ofReach A 53
3.8.4 Design Components 55
3.8.4.1 Channel Bed 56
3.8.4.2 Channel Banks 57
3.9
3.8.4.3 Bank Vegetation 57
Vegetative_Es.tablishment 57
Planting Densities 58
Plant Materials 59
Cuttings 59
Seed 59
Herbaceous Tubelings 60
.
Soil Requirements 60
BRIDGE AND STREAM CROSSINGS
61
3.10
3.9.3 Supporting Data 62
3.9.4 Design .Components 62
3.9.4.1 Interstate Bridge Piers and WaterPipeline Support Structures 63
3.9.4.2 Culverts 63
Culvert.CutQffZHeadwalls 63
Embankment and Road Approaches 64
3.9.4.3 Diversion Channel Culvert 64
BORROW AREA 64
3.10.1 Objectives 65
3.10.2 Design Criteria 65
3.10.2.1 Suitability Criteria 65
3.10.2.2 Excavation and Reclamation Criteria 65
iii
TABLE OF CONTENTS
(continued)
Rage
3.11 3.10.4 Design Components 67
FLOODPLAIN RECONSTRUCTION 69
3.11.1 Objectives 69
3.11.2 Design Criteria 69
3.11.3 Supporting Data 70
3.11.4 Design Components 71
3.12 REVEGETATION 72
3.12.1 Objectives 72
3.12.2 Design Criteria 73
3.12.2.1 Hydrologic Component ofRevegetation Habitat Types 73
3.12.2.2 Soil Component ofRevegetation Habitat Types 73
3.12.2.3 ARARs 74
3.12.3 Supporting Data 74
3.12.3.1 Soils 74
3.12.3.2 Hydrology 75
3.12.3.3 Vegetation and Revegetation 75
3.12.4 76
3.13 RAILROAD MATERIALS REMEDIATION 80
3.13.1 Objectives 80
3.13.2.1 Areas PotentiallyAffecting the Remediated Floodplain 81
3.13.2.2 Areas Outside ofthe Operable Unit 81
3.13.3 Supporting Data 81
3.13.4.1 Rock CoverforFloodplain Protection 82
3.13.4.2 Sediment Basins for Off-Site Retention 82
3.14 OTHER CONSIDERATIONS 84
3.14.3 Construction Sequencing 85
3.14.4 Permit Requirements 85
3.14.4.1 Air Quality 86
3.14.4.2 High Hazard Dam 86
3.14.4.3 Floodplain Development 86
3.14.4.4 Burning 86
3.14.4.5 Non-Hazardous and Hazardous Solid Waste Disposal 86
3.14.4.6 Highway Encroachment 86
3.14.4.7 Stream Preservation Act Permit 86
3.14.4.8 Montana Pollutant Discharge Elimination System (MPDES)) 87
3.14.4.9 Weed Control 87
3.14.4.10 Section 404 ofthe Federal Clean WaterAct 87
3.14.4.11 Montana Ground WaterPollution Control System 87
3. 14.4.12 Natural Streambed and Land Preservation Act 310 Permit 87
IV
TABLE OF CONTENTS (continued)
Page
3.14.4.13 Permit to Appropriate Water 87
3.14.5 Utilities ' 88
3.14.6 Greenway Service District and the Greenway Trail 88
3.14.7 Rocker 88
3.14.8 Roads and Highways 89
3.14.9 Railroads 89
3 14 11 Historic Resource Preservation 89
3 14 1? Fguipment Decontamination 91
3.14.14 Stormwater Management and Erosion Control 92
4.0 ANCILLARY PLANS 95
PERFORMANCE STANDARDS COMPLIANCE PLAN 95
4.1
4.2 OPERATION AND MAINTENANCE PLAN 95
4.3 CONSTRUCTION QUALITY ASSURANCE PLAN 96
4.4 LONG-TERM MONITORING PLAN 96
4.5 INSTITUTIONAL CONTROLS/MANAGEMENT AND MAINTENANCE 96
4.6 INTERIM MONITORING PLAN 96
3.2-
5.0 CONSTRUCTION SCHEDULE 97
3.2-
3.3-
3R.E4-FERENCES
3.6-
3.6- LIST OF TABLES
3.7-
3.7-
3.9-1 Expected Discharge Apportionment at Diversion Channel Headworks 24
2 Diversion Channel Stone Size Gradations 25
3.10-1 Percentage Volume Removed as a Function of Over-Excavation Depth 32
3.10-1 Streambed Sediment Sampling Results 36
3.12-1 Mine Waste Characteristics and Repository Capacity 42
3.13-
2 Metal Concentrations in Leachate Solution from Amended Tailings Material ........ 46
3.13-1 General Characteristics Examined for Lime Amendment Materials 48
2 Lime Requirements for Six Highest Values 49
3.14-1 Estimated Backwater Elevations for Existing and Proposed Culvert Road Crossings . 64
1 Suitability Criteria for Floodplain Backfill Materials 66
2 In-place Densities and Borrow Volume Required 68
1 Summary of Seeding and Planting Acreage 78
1 Summary of Sediment Basins for Treatment of Runofffrom Neversweat
and Washoe Railroad Waste Material Areas 83
2 Summary of Slope Stability Analyses for Sediment Basins Treating Runoff
from Neversweat and Washoe Railroad Waste Material Areas 84
1 Landowner List - Reach A Remedial Action 90
v
TABLE OF CONTENTS
(continued)
LIST OF FIGURES
Figune Nq.
1.2-1 Location and Vicinity Map 3
3.7-1 Lime Requirement (Modified Sobek) 49
5-1 Construction Schedule 98
LIST OF APPENDICES
A SPECIAL PROVISIONS AND TECHNICAL SPECIFICATIONS
A-1 Special Provisions
A-2 Technical Specifications
B GROUNDWATER DEWATERING
C STREAM DIVERSION AND DEWATERING DATA
C-1 Diversion Structure
C-2 Diversion Channel
C-3 Upstream Reach A Dewatering (Above Diversion Structure)
D TAILINGS/IMPACTED SOILS REMOVAL DATA
D-1 Test Pit Results Within the Horizontal Extent ofTailings/Impacted Soil
D-2 Excavation Depth Calculation
D-3 Streambank Contaminant Concentration Data
E TRANSPORTATION PLAN AND HAUL ROAD DATA
E-1 Transportation Plan
E-2 Haul Road Data
F MINE WASTE RELOCATION REPOSITORIES DATA
F-1 Volume Estimates
F-2 Erosion Calculations
F-3 Runon Ditches, Runoff Ditches, and Sediment Basins Sizing
F-4 Geotechnical Evaluation
F-5 Groundwater Quality
F-6 Old Highway 10 Correspondence
G LIME RESOURCES
H CHANNEL AND STREAMBANKS RECONSTRUCTION DATA
H-1 Channel and Streambanks
H-2 County Road Crossing
BORROW AREAS DATA
REVEGETATION DATA
J
K RAILROAD MATERIALS REMEDIATION
K-1 Design Calculations for Off-Site Sediment Basins
K-2 Field Verification of Contaminated Material Locations and Properties
K-3 Rock Cover Volume Estimate for Railroad Materials Remediation
L MPDES STORMWATER EROSION CONTROL PLAN
vi
0
TABLE OF CONTENTS (continued)
LiST OF PLAN SHEETS
Sheet No.
Cover
1
M2 General Legend and Notes
M3 General Site Plan
M4a-d Existing Conditions
M5a-d Staking Plan
M5e Survey Control and Staking Elevations
M5f Haul Road Staking Plan (Floodplain Only)
M6a-d Groundwater Dewatering Plan
M6e Groundwater Dewatering Details
M7a-d In-Stream Sediment Removal And Fencing Plan
M8 Borrow Area
1
M9a Mine Waste Relocation Repository 2 Existing Site Features
M9b Mine Waste Relocation Repository 2 Site Plan - Final Buildout
M9c Mine Waste Relocation Repository 2 Site Plan - Reclamation
M9d Mine Waste Relocation Repository 2 Sections
M9e,f Mine Waste Relocation Repository 2 Details
MIOa-d Railroad Materials Remediation
MlOe Railroad Materials Remediation Floodplain Protection Details
MlOf Railroad Materials Remediation Sediment Basins
MIOg Railroad Materials Remediation Sediment Basin Details
Mil Transportation Plan
11 Site Plan of Reach A
12-16 Reconstructed Channel and Diversion Channel Plan and Profiles
17-111 Reconstructed Channel Cross-Sections
112 Typical Bank Treatment Details
113 Coir Fabric Installation
114 Fabric Wrapped Lift Assembly
115 Fabric Wrapped Lift Construction Forms
116-122 Diversion Channel Cross-Sections
123 Diversion Structure Details
124 Diversion Channel Details
125 Diversion Channel Outflow and Haul Road Crossing Details
126 County Road Crossing Details
127 Dewatering Cofferdam for Non-Deformable Channel
PI Cover Sheet
P2-P6 Greenway Trail Alignment
P7-P9 Greenway Trail Profile
P10 Typical Greenway Trail Details
P11 Whiskey Gulch Station Plan
P12 Horizontal and Vertical Alignment Data
LIST OF ABBREVIATIONS AND ACRONYMS
AA Assessment Area
AASHTO Amer. Assoc, of State Highway & Transportation Officials
ABA Acid-Base Account
ARARs Applicable or Relevant and Appropriate Requirements
ARCO Atlantic Richfield Company
BA Borrow Area
BA&P Butte, Anaconda, and Pacific Railroad
BMPs Best Management Practice
bey bank cubic yard
cfs cubic feet per second
C3CO3 Calcium Carbonate
CaO Calcium Oxide
Ca(OH) Calcium Hydroxide
2
CCE Calcium Carbonate Equivalent
CEC Cation Exchange Capacity
CMP Corrugated Metal Pipe
COE U.S. Army Corps of Engineers
Comprehensive SAP Comprehensive Sampling and Analysis Plan
CWA
Clean Water Act
cy cubic yard
DJ&A Druyvestein, Johnson, and Anderson
DNRC Department of Natural Resources
ECCE Effective Calcium Carbonate Equivalent
EO Executive Order
EPA U.S. Environmental Protection Agency
ESD Explanation of Significant Differences
ft feet
FDR Final Design Report
FS Feasibility Study
HOPE High Density Polyethylene
1-90/15 Interstate 90/15
ICs Institutional Controls
IDR Intermediate Design Report
Ibs/A pounds per acre
Ibs/cft pounds per cubic foot
Ibs/ft2 pounds per square foot
LAO Lower Area One
LKD Lime Kiln Dust
mg/Kg milligrams per kilogram
mg/L milligrams per liter
MEI Mussetter Engineering, Inc.
Milwaukee Road Chicago, Milwaukee, and St. Paul Railroad
MDEQ Montana Department of Environmental Quality
MUTCD Manual on Uniform Traffic Control Devices
MWRR Mine Waste Relocation Repository
NCP National Contingency Plan
viii
