htac 12 01-10 slridt update

SLRIDTSLRIDT(St. Louis River/Interlake/Duluth (St. Louis River/Interlake/Duluth

Tar)Tar) Superfund Site Superfund SiteUpdateUpdate

December 1, 2010December 1, 2010

SLRIDTSLRIDTSuperfund Site UpdateSuperfund Site Update

• SLRIDT Site Remediation SLRIDT Site Remediation Activities (2006-2009)Activities (2006-2009)

• 2010 Tallas Island Winter 2010 Tallas Island Winter DredgingDredging

• 2010 Construction Activities 2010 Construction Activities • 2011 Construction Activities2011 Construction Activities

SLRIDTSLRIDTSite Remediation 2006Site Remediation 2006

SLRIDTSLRIDT2010 Tallas Island Mitigation – Winter 2010 Tallas Island Mitigation – Winter

WorkWork

Tallas Island Winter DredgingTallas Island Winter Dredging

Segregation of Vegetative Root Mass from Ice



Tallas Island Winter Work


2010 Completed Construction Activities

• Installation of Residential Docks in Stryker Bay

• Installation of Reactive Carbon Mat in CAD

• Environmental Media Placement-Above Water

• CAD Cap Sand Delivery from Local Borrow Source

• CAD Capping with Sand Removed From Stryker

Bay Surcharge and Local Borrow Sources


2010 Completed Construction Activities • Tallas Island Compensatory Mitigation Project-Environmental

Media Dredging

• Environmental Media Placement-Below WaterStryker Bay

Slip 7Slip 6/CAD

• CAD End Dike Modifications

• Shoreline Buffer Zone and Habitat Restoration (MN Portion Only)

• Conduct Environmental Monitoring

Residential Docks Installed in Stryker Bay


ACM Installation in the CAD



EM Placement on Slip 7 Mud Flats Sand Cap


Vegetative Growth from EM Placement onSlip 7 Mud Flats Sand Cap

CAD Capping Sand Staged on Hallett Dock 6



CAD Capping Sand Conveyor System


CAD Capping Sand Spreader Barge


CAD Capping Sand Survey Operations

Daily Report for CAD capping sand placement



Tallas Island Dredging Equipment

Booster Pump For Transporting EM to SLRIDT Site


Spreader Barge Placing EM



Tallas Island Completed Dredge Area-Knowlton Creek

Shoreline Buffer Zone and Habitat Restoration Plan


EM Top Soil Stockpiling


SLRIDT SLRIDT Superfund Site UpdateSuperfund Site Update

Stryker Bay Buffer Zone Before Restoration

SLRIDT SLRIDT Superfund Site UpdateSuperfund Site Update

Stryker Bay Buffer Zone During Restoration


Stryker Bay Buffer Zone Before Restoration


Stryker Bay Buffer Zone After Restoration

59th Avenue Shoreline BufferZone Before Restoration


59th Avenue Shoreline Buffer Zone After Restoration


59th Avenue Shoreline Buffer Zone

(MN Portion Complete)

WIMN


Arrowhead Point Buffer Zone Before Restoration


Arrowhead Point Buffer Zone After Restoration


54th Avenue Peninsula EM Placement


54th Avenue Peninsula Restoration


54th Avenue Peninsula Buffer ZoneBefore Restoration - (East Side of CAD)


54th Avenue Peninsula Buffer Zone After Restoration - (East Side of CAD)


54th Avenue Peninsula Buffer ZoneBefore Restoration - (East Side of CAD)


54th Avenue Peninsula Buffer ZoneAfter Restoration - (East Side of CAD)


54th Avenue Peninsula Buffer Zone During Restoration


54th Avenue Peninsula Buffer Zone After Restoration


CAD End Dike Prior to Removal


CAD End Dike Removal


CAD End Dike Removal After Completion



54th Avenue Peninsula Buffer Zone Before Restoration


54th Avenue Peninsula Buffer Zone After Restoration


2011 Construction Activities

• Shoreline Buffer Zone and Habitat Restoration-Wisconsin Portion

• Long-Term Monitoring Activities

SLRIDTSLRIDT Superfund Site Update - Next Steps Superfund Site Update - Next Steps

Long Term Monitoring Plan:

1. Cap Effectiveness

2. Cap Stability

3. Vegetation Establishment

4. Benthic Establishment

Next Five Year Review for entire site• Start in 2012 and end in 2013

SLRIDTSLRIDT Superfund Site Update - Next Steps Superfund Site Update - Next Steps

Reports:1. Construction Completion Report March

2011• Summary of activities• As-built plans• Data

2. Annual Monitoring Report• Site Activity Summary• Monitoring Data

Want More Information?Visit www.slridt.com or contact

Lisa Neitzel at [email protected]

Thank you!


htac 12 01-10 slridt update

Technology

thavenue peninsula restoration

source cad capping

thavenue peninsula bufferzone

water cad cap sand delivery

thavenue shoreline bufferzone

habitat restoration

stryker bay surcharge

water stryker bay slip