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June 6, 2013. SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE. Nick Anton, CDM Smith Todd Bragdon, CDM Smith Mary Boardman, CDPHE Joy Jenkins, U.S. EPA Region 8 Chad Van Drie, CO Cleanup Corp. Introduction – Captain Jack Mill Superfund Site.

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June 6 2013

June 6, 2013

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Nick Anton, CDM Smith

Todd Bragdon, CDM Smith

Mary Boardman, CDPHE

Joy Jenkins, U.S. EPA Region 8

Chad Van Drie, CO Cleanup Corp.


Introduction captain jack mill superfund site

Introduction – Captain Jack Mill Superfund Site

  • Remedial Design/Action (RD/RA) Project Team

    • CDM Smith; Engineering Design and Construction Administration

    • Colorado Department of Public Health and Environment;Lead Regulatory Agency

    • U.S. EPA Region 8; Supporting Regulatory Agency

    • Boulder County;Supporting Local Agency

    • Colorado Cleanup Corporation; Remedial Action Contractor

  • Previous RI/FS & ROD

    • Nature & Extent of Contamination

    • Selected Remedy

  • RD/RA Discussion Summary

    • Site Conditions

    • Design Approach

    • Construction Activities

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Site location layout

Site Location & Layout

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Site conditions big five mine dump

Site Conditions - Big Five Mine Dump

Erosion (Head-cutting), Stormwater &Adit Discharge (Infiltration), Direct Exposure

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Site conditions black jack adit captain jack mill

Site Conditions - Black Jack Adit & Captain Jack Mill

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Former Mill & Tailings Ponds & Adit, Direct Exposure, Boulder County Borrow Area


Site conditions residential property philadelphia mine

Site Conditions - Residential Property & Philadelphia Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Erosion, Direct Exposure


Site conditions white raven mine

Site Conditions – White Raven Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Erosion, Direct Exposure


Pre design investigation

Pre-Design Investigation

Additional Data Collection to Support Design

Geotechnical properties of mine waste

Geotechnical/agronomic properties for borrow material characteristics and volumes

Additional mine feature assessment (Cornucopia and Philadelphia Mines)

Additional structural/features assessment including culverts, Mill building, debris volume, ACM, and septic system

Additional cultural resource assessment

Team Subcontractors: Geocal Inc., Advanced Terra Testing, PinyonEnv. Engineering, SWCA Env. Consultants, CSU Soils Laboratory

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Remedial action overview

Remedial Action Overview

Remedial Action Objectives

Reduce Exposure to Metals in Soil (Arsenic, Lead, and Thallium)

Reduce Metals Loading to Groundwater from Surface Sources

Reduce Instream Surface Water Metals Concentrations

Remedial Goal: Lead in Soil < 380 to 860 mg/kg (Area Specific)

Selected Remedy (2008 Record of Decision)

Adit Water Diversion

Removal of Mine Waste from Various Site Sources and Consolidate and Cover Mine Waste at the Captain Jack Repository

Regrade and Cover Mine Waste at Big Five Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Remedial action overview1

Remedial Action Overview

Additional Reclamation Components

Structure demolition

Extend Black Jack Portal

Sedimentation basins for adit water diversion system

Run-on and runoff controls at repositories

Cover systems - 12” subsoil and 12” growth media

Restoration of excavated and disturbed areas

4-6” growth media, seeding, erosion controls

Parent ground reclamation

Willow and tree plantings

Residential property septic system replacement

Culvert replacement

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Design approach big five mine dump

Design Approach - Big Five Mine Dump

Divert Adit Discharge, Regrade3H:1V (16,000 CY), Install Soil Cover

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Design black jack adit captain jack mill

Design - Black Jack Adit & Captain Jack Mill

Regrade Tailings Pond, Extend Portal, Consolidate Mine Waste (46,000 cy), Borrow Source, Install Soil Cover

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Design residential property philadelphia mine

Design - Residential Property & Philadelphia Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Relocate Residents, Remove Debris, Remove Mine Waste (6,000 cy), Restore Property


Design white raven mine

Design – White Raven Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Remove Mine Waste (12,000 cy), Restore Property


Remedial action big five mine dump

Remedial Action – Big Five Mine Dump

  • Excavation and regrading mine waste, 2 ft soil cover

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Remedial action big five mine dump1

Remedial Action – Big Five Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Run-on control; adit drainage ponds and discharge piping


Remedial action big five mine dump2

Remedial Action – Big Five Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Access and runoff controls


Remedial action big five mine dump3

Remedial Action – Big Five Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Runon controls and cornucopia mine reclamation


Remedial action captain jack area

Remedial Action – Captain Jack Area

  • Portal extension and lime amendment

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Remedial action captain jack area1

Remedial Action – Captain Jack Area

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Mill demolition, mine waste consolidation, borrow material preparation


Remedial action captain jack area2

Remedial Action – Captain Jack Area

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Mine waste consolidation and 2-ft soil cover


Remedial action captain jack area3

Remedial Action – Captain Jack Area

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Run-on controls


Remedial action captain jack area4

Remedial Action – Captain Jack Area

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Runoff controls


Remedial action captain jack area5

Remedial Action – Captain Jack Area

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Erosion controls and seeding


Remedial action residential property

Remedial Action – Residential Property

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Mine waste removal, culvert replacement, septic system replacement


Remedial action philadelphia mine dump

Remedial Action –Philadelphia Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Mine waste excavation, parent ground amendment, slash placement


Remedial action philadelphia mine dump1

Remedial Action –Philadelphia Mine Dump

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Erosion control and seeding


Remedial action residential property philadelphia

Remedial Action – Residential Property & Philadelphia

Property Restoration – Growth media placement, seeding, erosion controls, sod, tree planting, willow stakes

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


Remedial action white raven mine

Remedial Action – White Raven Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Mine waste removal; adit portal structural restoration and gate

xxx


Remedial action white raven mine1

Remedial Action – White Raven Mine

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE

Restoration – Fill and rock placement, erosion controls, seeding


Questions

Questions

SURFACE RECLAMATION OF THE CAPTAIN JACK MILL SUPERFUND SITE


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