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PolyMet Mining Proposed Plant and Tailings Sites

PolyMet Mining Proposed Mine Site

WhitefaceReservoirWhitefaceReservoir

LongLakeLongLake

ComstockLakeComstockLake

WolfLakeWolfLake

KingLakeKingLake

LieunaLakeLieunaLake

Lake SuperiorLake Superior

LaxLakeLaxLake

GreenwoodLakeGreenwoodLake

BigLakeBigLake

Seven BeaverLakeSeven BeaverLake

PineLakePineLakeButterball

LakeButterballLake

CaddotteLake

CaddotteLake

BassettLakeBassettLake

LoonLakeLoonLake

WhitewaterLakeWhitewaterLake

ColbyLake

ColbyLake

SabinLake

SabinLake

WynneLake

WynneLake

BirchLakeBirchLake

SandLakeSandLake

SlateLakeSlateLake

DumbbellLake

DumbbellLake

IsabellaLakeIsabellaLake

BogLakeBogLake

QuadgaLakeQuadgaLake

Bald EagleLakeBald EagleLake

GabbroLake

GabbroLake

GullLakeGullLake

WhiteIronLake

WhiteIronLake

One PineLakeOne PineLake

JohnsonLakeJohnsonLake

Bear IslandLakeBear IslandLakeBear

HeadLake

BearHeadLake

OmadayLake

OmadayLake

Nickel LakeNickel Lake

BogberryLake

BogberryLake

SouthMcDougalLake

SouthMcDougalLake

NorthMcDougal

Lake

NorthMcDougal

Lake

St. Louis River

St. Louis River

BirchLakeBirchLake

Cloquet

River

Cloquet

River

HarrisLake

HarrisLake

Boundary Waters Canoe Area Wilderness (BWCAW)

BWCAW

BWCAW

Sand Lake Peatland Scientific

and Natural Area

Sand Lake Peatland Scientific

and Natural Area

Tettegouche State Park

BearHeadLakeState Park

Purvis Lake-Ober Foundation SNA

Hoyt LakesHoyt Lakes

AuroraAurora

TwoHarborsTwoHarbors

Silver BaySilver Bay

BabbittBabbitt

IsabellaIsabella

TowerTower

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135

T. 61, R. 11

T. 60, R. 11

T. 59, R. 11

T. 58, R. 11

T. 57, R. 11

T. 56, R. 11

T. 55, R. 11

T. 54, R. 11

T. 53, R. 11

T. 62, R. 11

T. 61, R. 12

T. 60, R. 12

T. 59, R. 12

T. 58, R. 12

T. 57, R. 12

T. 56, R. 12

T. 55, R. 12

T. 54, R. 12

T. 53, R. 12

T. 62, R. 12

T. 61, R. 10

T. 60, R. 10

T. 59, R. 10

T. 58, R. 10

T. 57, R. 10

T. 56, R. 10

T. 55, R. 10

T. 54, R. 10

T. 53, R. 10

T. 62, R. 10

T. 61, R. 9

T. 60, R. 9

T. 59, R. 9

T. 58, R. 9

T. 57, R. 9

T. 56, R. 9

T. 62, R. 9

T. 61, R. 8

T. 60, R. 8

T. 59, R. 8

T. 58, R. 8

T. 57, R. 8

T. 56, R. 8

T. 62, R. 8

T. 61, R. 7

T. 60, R. 7

T. 59, R. 7

T. 58, R. 7

T. 57, R. 7

T. 56, R. 7

T. 62, R. 7

T. 61, R. 13

T. 60, R. 13

T. 59, R. 13

T. 58, R. 13

T. 57, R. 13

T. 56, R. 13

T. 55, R. 13

T. 54, R. 13

T. 53, R. 13

T. 62, R. 13

T. 61, R. 14

T. 60, R. 14

T. 59, R. 14

T. 58, R. 14

T. 57, R. 14

T. 56, R. 14

T. 55, R. 14

T. 54, R. 14

T. 53, R. 14

T. 62, R. 14

T. 60, R. 15

T. 59, R. 15

T. 58, R. 15

T. 57, R. 15

T. 56, R. 15

T. 55, R. 15

T. 54, R. 15

T. 53, R. 15

Spruce Road DepositTwin Metals Minnesota

Cu,Ni,PGM

Maturi DepositTwin Metals Minnesota

Cu,Ni,PGM

Birch Lake DepositTwin Metals Minnesota

Cu,Ni,PGM

Serpentine DepositEncampment Minerals

Cu,Ni,PGM

Mesaba DepositTeck American Inc.

Cu,Ni,PGM

NorthMet DepositPolyMet Mining Corp.

Cu,Ni,PGM

Titac South Deposit Fe, Ti

Longnose Deposit Ti

Titac North Deposit Fe, Ti

Water Hen DepositPrime Meridian Resources

Cu,Ni,PGM,Ti

Skibo DepositEncampment Minerals

Cu,Ni,PGM,Ti

Sect. 22 DepositEncampment Minerals

Cu,Ni,PGM,Ti

Wyman Creek DepositEncampment Minerals

Cu,Ni,PGM,Ti

Section 17 Deposit Ti

Longear Deposit Ti

Dunka Area Deposits Cu,Ni,PGMTwin Metals Minnesota

S. Filson Creek Deposit Cu,Ni,PGMEncampment Minerals

Wetlegs Deposit Cu,Ni,PGM

NI 43-101

NI 43-101

NI 43-101

NI 43-101

NI 43-101

NI 43-101

MesabiNuggetIdledPlant

Cliffs Natural ResourcesNorthshore Taconite Mining Plant

TamarackTamarackHigh

way 210

Highway

210

Highway 210Highway 210

Burlington Northern Santa Fe Railway

Carlton C

ountyC

arlton County

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RoundLake

RoundLake

LakeMinnewawaLakeMinnewawa

SherriffLake

SherriffLake

T. 47, R. 22

T. 48, R. 22

T. 47, R. 23T. 47, R. 21

T. 48, R. 21

T. 48, R. 23

T. 49, R. 23

T. 49, R. 22

T. 49, R. 21

Wright

Canadian National Railway

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Northshore Mining Railroad

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6037

Kennecott explorationdrilling compiled by DNR

11 - 20 drill holes11 - 20 drill holes1 - 10 drill holes1 - 10 drill holes

20 - 30 drill holes20 - 30 drill holes

30 - 40 drill holes30 - 40 drill holes

40 - 60 drill holes40 - 60 drill holes

Cluster analysis applied by DNR to generalize the exploration drill hole locations due to this small scale maprepresentation.

0 1 2Miles Map Scale 1:100,000

Tamarack Area Inset Map

Tamarack North DepositKennecott Exploration & Talon Metals JV

Ni,Cu,PGM

NI 43-101

Exploration for Metallic Mineral Resources in MinnesotaCopper, Nickel, and Platinum Group Metals

TheDULUTH COMPLEXHosting World

Class Copper, Nickel, and Platinum Group

Metal ResourcesExplor ing since 1948

There are many deposits of copper, nickel, and Platinum Group Metal (PGM) resources in the bedrock along approximately 40 miles of the edge of the Duluth Complex near Babbitt, Minnesota. This map shows the locations of the deposits, state metall ic mineral leases, and federal hardrock leases and prospecting permits.

There is another discovery of copper, nickel, and PGM at Tamarack (shown in the Tamarack Map below) , which is located along the west flank of the Midcontinent Rift approximately 100 miles south-west of the Babbitt area deposits. The discovery is contained within an intrusion that is associated with the Midcontinent Rift.

TheTAMARACKDISCOVERY

A Nickel, Copper, andPlatinum Project

First drilled in 1984 by the MGS. Followed up in 1999 by Kennecott Exploration who discovered significant mineralization by 2008. In June 2014 Talon Metals

Corporation entered into anexploration and option agreement

with Kennecott.

DisclaimerThe State of Minnesota makes no representations or warranties express or implied, with respect to the use of the information contained herein regardless of its format or the means of its trans-mission. There is no guarantee or representation to the user as to the accuracy, currency, suitabil ity, completeness, usefulness, or reliabil ity of this information for any purpose. The user accepts the information “as is." The State of Minnesota assumes no responsibil ity for loss or damage incurred as a result of any user’s reliance on this information. All maps, reports, data, and other information contained herein are protected by copyright. Permission is granted to copy and use the materials herein for any lawful noncommercial purpose. Any user of this information agrees not to transmit or provide access to all or any part of this information to another party unless the user shall include with the information a copy of this disclaimer.

About this map and dataMap was updated by Kevin Hanson in February of 2016 at the Minnesota Department of Natural Resources, Division of Lands and Minerals.

Iron Mining Plant Status (1/17), Iron Mining Features (1/15), Known Metall ic Mineral Deposits (02/14), Exploration Drill ing for Kennecott Exploration (12/16), and Active State Metall ic Mineral Leases (02/28/17) from the DNR’s Division of Lands and Minerals. Federal Hardrock Leasing and Prospecting Permits from USDA Forest Service (1/15 - No changes to this data since January of 2015 through August of 2016). Bedrock Geology features were generalized from the MGS S-21, 2011 version (1:500,000). Roads and Railroads from MnDOT; County Boundaries, State Parks, SNAs, BWCAW, Public Land Survey features, and Cities from the DNR; Lakes shown are greater than 200 acres and were taken from the DNR.

February 2017 - Exploration for Metallic Mineral Resources: Copper, Nickel, and Platinum Group Metals, Duluth Complex Map

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Map Locations

Duluth

Minneapolis and St. PaulMinneapolis and St. Paul

Ontar io, Canada

MINNESOTA

Duluth Complex

MapTamarack

Map

Iron Ore Mining FeaturesIdled taconite pellet plant or pig iron nugget plant

In closure taconite mining plant

Biwabik Iron Formation

Taconite or Natural Iron Ore PitTailings Basin

Exploration Leases and Permits

Active state nonferrous metallic mineral leasesSee company label codes below for map labels. State leases have no numberappended to the label.

Active federal hardrock mineral leasesBeaver Bay Joint Venture (’B2’) is the only company with federal mineral leases.

Active federal hardrock prospecting permitsThe map labels add a ‘3’ after a companies label code where theyhave a federal prospecting permit to help differentiate them from other leases.

Company labeled codesA - Agate Lake Resources D - DMC (USA) LLCE - Encampment MineralsP3 - Prime Meridian ResourcesTA - Teck American Inc.

Twin Metals Minnesota and its Ownership InterestsB2 - Beaver Bay Joint VentureF - Franconia MineralsL - Lehmann ExplorationT - Twin Metals Minnesota

Tamarack Inset Map Only: HTX - HTX Minerals K - Kennecott Exploration Co.

Mineral DepositsDeposits of Copper, Nickel, PGM and/or Titanium

*National Instrument NI 43-101 is a national instrument for the Standards of Disclosure for Mineral Projects within Canada. Mineral deposits on this map with a completed NI 43-101 are: Spruce Road, Maturi, Birch Lake, NorthMet, Longnose, Titac South, and Tamarack North.

General Bedrock Geology TerranesDuluth Complex

North Shore Volcanic Group, Beaver Bay Complex, or miscellaneous midcontinent rift intrusions

Penokean Virginia Formation, Thomson Formation, or Pokegama Quartzite

Archean Granite or Greenstones of the Superior Province

Deposit Name MineralsCompany

PolyMet’s NorthMet Project Area

Map Scale is 1:110,000

*NI 43-101

The number ‘3’ is appended to the label code for Federal Prospecting Permits.

Private mineral leases are not shown.

Terminated state nonferrous metallic mineral leases (1967-March 2017)

Active taconite mining plant

0 1 2 3 4Miles