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The Natural Heritage Network and Biodiversity Biological Inventory of Rio Grande and Conejos Counties, Colorado Prepared for: The Nature Conservancy 1881 9th St., Suite 200 Boulder, CO 80302 Prepared by: Steve Kettler, Joe Rocchio, Robert Schorr, Julie Burt Colorado Natural Heritage Program Colorado State University College of Natural Resources 254 General Services Building Ft. Collins, Colorado 80523 March 31, 2000 Biological Inventory of Rio Grande and Conejos Counties, Colorado Prepared for: The Nature Conservancy 1881 9th St., Suite 200 Boulder, CO 80302 Prepared by: Steve Kettler, Joe Rocchio, Robert Schorr, Julie Burt Colorado Natural Heritage Program Colorado State University College of Natural Resources 254 General Services Building Ft. Collins, Colorado 80523 March 31, 2000 ii ACKNOWLEDGMENTS............................................................................................................................ VIII EXECUTIVE SUMMARY............................................................................................................................. IX INTRODUCTION..............................................................................................................................................1 GENERAL STUDY AREA DESCRIPTION ..............................................................................................................2 METHODS .........................................................................................................................................................6 RESULTS..........................................................................................................................................................15 POTENTIAL CONSERVATION AREAS................................................................................................................21 SIGNIFICANT WILDLIFE HABITAT ...................................................................................................................24 RECOMMENDATIONS .................................................................................................................................26 POTENTIAL CONSERVATION AREA PROFILES..................................................................................28 B2 POTENTIAL CONSERVATION AREAS..........................................................................................................29 Alamosa River at Government Park Potential Conservation Area ..........................................................29 Cedar Spring Uplands Potential Conservation Area ...............................................................................33 Dry Creek Uplands Potential Conservation Area ....................................................................................36 East Butte Potential Conservation Area ...................................................................................................39 Fivemile Park Potential Conservation Area.............................................................................................42 Grayback Mountain Potential Conservation Area ...................................................................................45 Hot Creek Potential Conservation Area ...................................................................................................48 La Jara Creek Uplands Potential Conservation Area..............................................................................54 Lasauses Potential Conservation Area.....................................................................................................57 Limekiln Creek Uplands Potential Conservation Area.............................................................................61 Ojito Creek Uplands Potential Conservation Area ..................................................................................64 Park Creek at Summit Pass Potential Conservation Area........................................................................67 Ra Jadero Canyons Potential Conservation Area ....................................................................................70 San Luis Hills – Flat Top Potential Conservation Area ...........................................................................73 Spring Creek at Greenie Mountain Potential Conservation Area............................................................76 B3 POTENTIAL CONSERVATION AREAS..........................................................................................................82 Alamosa River at De la Luz Cemetery Potential Conservation Area .......................................................82 Coal Creek at Platoro Reservoir Potential Conservation Area................................................................86 Conejos River at Menkhaven Ranch Potential Conservation Area ..........................................................89 Conejos River at Platoro Potential Conservation Area............................................................................92 Dry Pole Creek Uplands Potential Conservation Area ............................................................................95 Elephant Rocks Potential Conservation Area...........................................................................................98 Hicks Canyon Potential Conservation Area ...........................................................................................102 Highway Spring Potential Conservation Area .......................................................................................105 Hot Creek/La Jara Creek Confluence Potential Conservation Area......................................................109 Indian Head Potential Conservation Area .............................................................................................112 Iron Creek Potential Conservation Area ................................................................................................115 Lake Fork Potential Conservation Area .................................................................................................119 La Manga Creek Potential Conservation Area.......................................................................................122 Lower Rock Creek Potential Conservation Area....................................................................................125 McIntire Springs Potential Conservation Area ......................................................................................129 Rio Grande at Monte Vista Potential Conservation Area ......................................................................134 Rito Hondo Creek Potential Conservation Area.....................................................................................139 Rock Creek Gaging Station Potential Conservation Area......................................................................142 iii South Fork of the Conejos River and Hansen Creek Potential Conservation Area ...............................145 Terrace Reservoir North Potential Conservation Area ..........................................................................149 Tower Hill Potential Conservation Area ................................................................................................152 West Alder Creek Potential Conservation Area .....................................................................................155 B4 POTENTIAL CONSERVATION AREAS........................................................................................................158 Adams Fork of Conejos River Potential Conservation Area ..................................................................158 Bighorn Creek Potential Conservation Area..........................................................................................161 Bishop Rock Potential Conservation Area .............................................................................................164 Cascade Creek at Osier Potential Conservation Area ...........................................................................167 Conejos River Springs Potential Conservation Area..............................................................................170 Fairy Hills Potential Conservation Area................................................................................................173 Greenie Mountain Foothills Potential Conservation Area.....................................................................176 Limekiln Point Potential Conservation Area..........................................................................................179 Osier Creek Potential Conservation Area ..............................................................................................182 Poso Creek Potential Conservation Area ...............................................................................................185 Rio Grande at Embargo Creek Potential Conservation Area ................................................................188 Rio San Antonio Potential Conservation Area .......................................................................................191 Rito Gato Potential Conservation Area..................................................................................................194 San Francisco Lakes Potential Conservation Area ................................................................................196 San Luis Hills At Emory Orr Spring Potential Conservation Area ........................................................199 San Luis Hills At Lasauses Potential Conservation Area.......................................................................202
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