EXECUTIVE SUMMARY

SECTION I: INTRODUCTION

I.A OVERVIEW
I.A.1 Need for this Study
I.A.2 Underground Bituminous Coal Mining’s Historical Role in Pennsylvania
I.A.3 Environmental Consequence of Mining

I.B ENVIRONMENTAL LAWS AND COAL MINING
I.B.1 Bituminous Mine Subsidence and Land Conservation ACT of 1966
I.B.2 Surface Mining Control Act of 1977
I.B.3 Act 54
I.B.4 Special Act 54 Requirements

I.C UNDERGROUND BITUMINOUS COAL MINING METHODS IN PENNSYLVANIA
I.C.1 Room-and-Pillar Method
I.C.2 Pillar Recovery Mining Method
I.C.3 Longwall Mining Method

I.D GENERAL DESCRIPTION OF COAL MINING IMPACTS
I.D.1 General Description of Coal Mining Impacts
I.D.2 General Description of Coal Mining Resolutions

I.E SUBSIDENCE RELATED IMPACTS
I.E.1 Potential Impacts Associated with Room-and-Pillar Mining
I.E.2 Potential Impacts Associated with Pillar Recovery and Longwall Mining
I.E.3 Formation of Subsidence Basin
I.E.4 The Final Shape and Impact of the Subsidence Basins

I.F CONTEXT OF THIS REPORT
I.F.1 1st Assessment
I.F.2 2nd Assessment
I.F.3 3rd Assessment

I.G CURRENT CONTRACT TASKS AND REPORT STRUCTURE
I.G.1 Data Collection and Spatial Analysis
I.G.2 Mining During the 3rd Assessment
I.G.3 Effects of Mining on Interstate 79
I.G.4 Effects of Mining on Structures
I.G.5 Effects of Mining on Water Supplies
I.G.6 Effects of Mining on Land
I.G.7 Effects of Mining on Streams and Wetlands
I.G.8 Effects on Utilities and Transportation

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