Prepared for: EARLY SUMMER RARE VEGETATION SURVEY FOR THE PROPOSED ENBRIDGE PIPELINES INC. ALBERTA CLIPPER PROJECT Enbridge Pipelines Inc. Prepared by: TERA Environmental Consultants Suite 1100, 815 - 8th Avenue S.W. Calgary, Alberta T2P 3P2 Phone: (403) 265-2885 September 2007 4462.07 Enbridge Pipelines Inc. Alberta Clipper Project Early Summer Rare Vegetation Survey TABLE OF CONTENTS Page 1.0 INTRODUCTION.............................................................................................................................. 1 1.1 Project Description.............................................................................................................. 1 1.2 Ecosystem Classification .................................................................................................... 3 2.0 METHODS ....................................................................................................................................... 5 2.1 Literature Review ................................................................................................................ 5 2.2 Data Collection.................................................................................................................... 6 2.3 Survey Locations................................................................................................................. 6 3.0 RESULTS......................................................................................................................................... 7 3.1 Alberta................................................................................................................................. 7 3.1.1 Potential Species at Risk ....................................................................................... 7 3.1.2 Previous Rare Species and Community Observations.......................................... 7 3.1.3 Rare Plants .......................................................................................................... 10 3.1.3.1 Pale Blue-Eyed Grass (Sisyrinchium septentrionale) (S2S3)................. 10 3.1.4 Rare Plant Communities ...................................................................................... 10 3.2 Saskatchewan................................................................................................................... 10 3.2.1 Potential Species at Risk ..................................................................................... 10 3.2.2 Previous Rare Species and Community Observations........................................ 11 3.2.3 Rare Plants .......................................................................................................... 15 3.2.3.1 Annual Lupine (Lupinus pusillus) (S3) .................................................... 15 3.2.3.2 Bracted Bog Orchid (Coeloglossum viride var. virescens) (S3S4)......... 16 3.2.3.3 Bristly Mousetail (Myosurus apetalus var. borealis) (S2?) ..................... 16 3.2.3.4 Common Beggarticks (Bidens frondosa) (S2S3).................................... 16 3.2.3.5 Field Grape Fern (Botrychium campestre) (S1)...................................... 17 3.2.3.6 Pale Blue-Eyed Grass (Sisyrinchium septentrionale) (SNR).................. 17 3.2.4 Rare Plant Communities ...................................................................................... 17 3.3 Manitoba ........................................................................................................................... 17 3.3.1 Potential Species at Risk ..................................................................................... 17 3.3.2 Previous Rare Species and Community Observations........................................ 18 3.3.3 Rare Plants .......................................................................................................... 18 3.3.3.1 Golden Bean (Thermopsis rhombifolia) (S2) .......................................... 18 3.3.3.2 Narrowleaf Milk Vetch (Astragalus pectinatus) (S2S3)........................... 19 3.3.3.3 Small White Lady's-Slipper (Cypripedium candidum) (S1)..................... 19 3.3.4 Rare Plant Communities ...................................................................................... 19 4.0 DISCUSSION AND RECOMMENDATIONS.................................................................................. 20 5.0 REFERENCES............................................................................................................................... 22 5.1 Personal Communications ................................................................................................ 22 5.2 Literature Cited.................................................................................................................. 22 LIST OF APPENDICES Appendix A Potential Rare Vascular Plant Species in the Ecoregions Traversed by the Proposed Alberta Clipper Pipeline Route ......................................................................... 25 Appendix B Potential Rare Vascular Plant Communities in the Ecoregions Traversed by the Proposed Alberta Clipper Pipeline Route ................................................................... 58 Appendix C Element Occurrence Results Within 1 km of the Proposed Alberta Clipper Pipeline Route................................................................................................................... 62 September 2007 4462 Page i Enbridge Pipelines Inc. Alberta Clipper Project Early Summer Rare Vegetation Survey Appendix D Rare Plant Survey Locations Along the Proposed Alberta Clipper Pipeline Route................................................................................................................................. 66 Appendix E Locations of Rare Plants Observed Along the Proposed Alberta Clipper Pipeline Route During the 2007 Early Summer Survey.................................................... 77 Appendix F Photoplates of Observed Rare Plant Species Along the Proposed Alberta Clipper Pipeline Route ...................................................................................................... 89 Appendix G Observed Plant Species Along the Proposed Alberta Clipper Pipeline Route – by Type and Common Name ............................................................................ 101 LIST OF FIGURES Figure 1 Regional Location of the Alberta Clipper Project ................................................................ 2 Figure D-1 Rare Plant Survey Locations along the Proposed Alberta Clipper Pipeline ..................... 73 Figure E-1 Locations of Rare Plants Observed along the Proposed Alberta Clipper Pipeline Route during the 2007 Early Summer Survey .................................................... 78 LIST OF TABLES Table 1 Ecoregions Encountered by the Proposed Alberta Clipper Pipeline Route........................ 3 Table 2 Rare Plants Observed in Alberta During Previous Surveys for Terrace Phase II ............................................................................................................................... 8 Table 3 Location of Pale Blue-Eyed Grass (S2S3) Occurrences Along the Alberta Clipper Pipeline Route in Alberta...................................................................................... 10 Table 4 Rare Plants Observed During Previous Surveys in Saskatchewan ................................. 11 Table 5 Locations of Rare Plants Along the Alberta Clipper Pipeline Route in Saskatchewan................................................................................................................... 15 Table 6 Locations of Rare Plants Observed Along the Proposed Alberta Clipper Pipeline Route During the Early Summer 2007 Survey.................................................... 18 Table 7 Recommended Mitigation Measures for the Rare Plant Species Observed Along the Alberta Clipper Pipeline Route ......................................................................... 20 Table A-1 Potential Rare Vascular Plant Species in the Central Parkland Natural Subregion of Alberta ......................................................................................................... 26 Table A-2 Potential Rare Vascular Plant Species in the Northern Fescue Natural Subregion of Alberta ......................................................................................................... 29 Table A-3 Potential Rare Vascular Plant Species in the Aspen Parkland Ecoregion of Saskatchewan................................................................................................................... 30 Table A-4 Potential Rare Vascular Plant Species in the Moist Mixed Grassland Ecoregion of Saskatchewan ............................................................................................. 36 Table A-5 Potential Rare Vascular Plant Species in the Mixed Grassland Ecoregion of Saskatchewan................................................................................................................... 43 Table A-6 Potential Rare Vascular Plant Species in the Aspen Parkland Ecogregion of Manitoba ........................................................................................................................... 50 Table A-7 Potential Rare Vascular Plant Species in the Boreal Transition Ecoregion of Manitoba ........................................................................................................................... 54 Table A-8 Potential Rare Vascular Plant Species in the Lake Manitoba Plain Ecogregion of Manitoba ...................................................................................................