Division of Ecological Services
U.S. Fish and Wildlife Service
Department of the Interior
Washington, D.C.
Habitat as a Basis for Environmental Assessment: 101 ESM
09.15.1980
Release 4-80
Link to Entire 101 ESM
PDF 1.4 MB
Transmittal Sheet, Cover Page, Preface, Table of Contents
PDF 197 k
1. Introduction
PDF 88 k 
2. Legal Basis for Environmental Impact Assessments
PDF760 k
3. Ecological Basis for Environmental Impact Assessments
PDF669 k
4. Carrying Capacity and Habitat as a Basis for Environmental Impact Statements
PDF351 k
5. A Habitat-Based Impact Assessment Technique
PDF320 k
6. References Cited 
PDF326 k
Habitat Evalutation Procedures: 102 ESM
03.31.1980
Release 2-80
Link to Entire 102 ESM
PDF 10.3 MB
Cover, Preface, Table of Contents, List of Figures, List of Tables
PDF 199 k
1. Introduction
PDF151 k
2. Determination of the Applicability of HEP to a Wildlife Planning Effort
PDF256 k
3. Definition of Study Limits
PDF 1.1 M
4. Calculating Study Area Habitat Units
PDF 736 k
5. Habitat Assessments Using Habitat Units
PDF 812 k
6. Trade-Off Analysis 
PDF 509 k
7. HEP Application to Compensation Analysis
PDF 615 k
8. Example of HEP Application (Pages 1 - 16)
PDF 1.1 M
   Example of HEP Application (Pages 17 - 27)
PDF 694 k
9. References Cited & Appendix A: Forms for Use in the Habitat Evaluation Procedures (Pages 1 -15)
PDF 954 k
   References Cited & Appendix A: Forms for Use in the Habitat Evaluation Procedures (Pages 16 -32)
PDF 1.1 M
Appendix B: Guidelines for Development of Sampling
PDF 968 k
Appendix C: Glossary
PDF 301 k
Standards for Development of HSI Models: 103 ESM
04.10.1981
Release 1-81
Link to Entire 103 ESM
PDF 5.5 MB
Transmittal Sheet, Cover, Preface, Table of Contents, List of Tables, List of Figures
PDF 203 k
1. Introduction
PDF 96 k
2. Use of Existing Models to obtain an HSI
PDF 220 k
3. Construction of HSI Models (Pages 1 - 20)
PDF 661 k
  Construction of HSI Models (Pages 21 - 40)
PDF 591 k
  Construction of HSI Models (Pages 41 - 54)
PDF509 k
References Cited & Appendix A: Habitat Use Information and HSI Model for the Gray Squirrel 
PDF461 k
Appendix B: Habitat Use Information and HSI Model for the Red-tailed Hawk
PDF687 k
Appendix C: Example Application of Model for the Red-tailed Hawk
PDF307 k
Appendix D: Habitat Use Information and HSI Model for the Channel Catfish
PDF1.1 M
Appendix E: Cover Types for Model Building
Appendix F: HSI Models Based on Discriminant Analysis
Appendix G: Glossary
PDF670 k
For additional information regarding this Web page, contact Krista Bibb , in the Division of Policy and Directives Management, at Krista_Bibb@fws.gov 

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