North Fork of the Shenandoah River Watershed Assessment Virginia and West Virginia
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North Fork of the Shenandoah River Watershed Assessment Virginia and West Virginia June 2008 Rapid watershed assessments provide initial estimates of where conservation investments would best address the concerns of landowners, conservation districts, and other community organizations and stakeholders. These assessments help landowners and local leaders set priorities and determine the best actions to achieve their goals. U.S. Department of Agriculture Natural Resources Conservation Service Richmond, Virginia "The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720- 6382 (TDD). USDA is an equal opportunity provider and employer." North Fork of the Shenandoah River Watershed Assessment Virginia and West Virginia Frederick, Page, Rockingham, Shenandoah and Warren Counties, Virginia and Hardy County, West Virginia Abstract This watershed assessment involved the collection of data and information for the purpose of developing a watershed profile, including a description of the natural resource conditions and trends, issues, concerns and problems along with recommendations for local action. The information will assist decisionmakers to make informed decisions and facilitate the timely implementation of various conservation programs. Authority Prepared under the authority of the Conservation Technical Assistance Program, Soil Conservation and Domestic Allotment Act of 1935, as amended, Public Law 74-46, 16 U.S.C. (590a-f and 590q), 7 CFR Part 610 (CFDA 10.902). Prepared By: USDA – Natural Resources Conservation Service In Cooperation With: Potomac Valley Soil Conservation District, WV Lord Fairfax Soil and Water Conservation District, VA Shenandoah Valley Soil and Water Conservation District, VA Shenandoah Resource Conservation and Development Council, VA For further information, please contact: JOHN A. BRICKER State Conservationist USDA – Natural Resources Conservation Service Culpeper Building, Suite 209 1606 Santa Rosa Road Richmond, Virginia 23229-5014 Telephone: (804) 287-1691 TABLE OF CONTENTS Page List of Figures …………………………………………………………………………. iv List of Tables ………………………………………………………………………….. vi EXECUTIVE SUMMARY ………………………………………………………….. vii PURPOSE …………………………………………………………………………….. 1 INTRODUCTION …………………………………………..……………………….. 1 PHYSICAL DESCRIPTION .………… .…………………………………………… 4 General Location and Description …………………………………………………. 4 Land Cover ………………………………………………………………………… 4 Climate and Precipitation ………………………………………………………….. 5 Geology ……………………………………………………………………….......... 6 Elevation and Slope Ranges ……………………………………………………….. 8 Soils ………………………………………………………………………………... 9 Erosion Potential …………………………………………………………………… 11 Wetlands and Hydric Soils ………………………………………………………… 12 Prime and Statewide Important Farmland …………………………………………. 13 Surface Water Flows ……………………………………………………………..... 14 Flooding Concerns …………………………………………………………………. 17 Ground Water Resources …………………………………………………………... 17 Water Withdrawals ………………………………………...………………………. 18 Irrigation …………………………………………………………………………… 18 Effects of Karst Topography……………………………………………………….. 19 Threatened and Endangered Species …………………………………………......... 20 Coldwater/Trout Streams ...……………………………………………………........ 21 Fish and Wildlife …………………………………………………………………... 21 Subwatershed Descriptions ……………………………………………………........ 24 RESOURCE CONDITIONS AND TRENDS ……………………………………… 42 Development ……………………………………………………………………….. 42 Land Cover Changes ……………………………………………………………..… 42 Forest Resources …………………………………………………………………… 47 Surface Water Quality ………………………………………………………….….. 48 Water Quality Trend Analysis ………………………………………………….….. 51 Shenandoah River Fish Kills ………………………………………………….…… 53 Citizen Monitoring …………………………………………………………………. 55 TMDL Studies and Implementation Plan ………………………………………….. 56 Animal Numbers and Distribution in the Watershed ………………………………. 57 Agricultural Pollutant Loadings…………………………………………………….. 61 ii TABLE OF CONTENTS (cont.) Page SOCIO-ECONOMIC DATA ………………………………………………………... 64 Introduction…………………………………………………………………………. 64 Population and Demographics……………………………………………………… 65 Education………………………………………………………………………….... 66 Employment………………………………………………………………………… 67 Income……………………………………………………………………………… 68 2002 Agricultural Census Data…………………………………………………….. 69 Farmer Profile………………………………………………………………………. 79 STAKEHOLDERS: ISSUES, CONCERNS AND OPPORTUNITIES ………….. 81 Natural Resource Considerations and Strategy Options …………………………… 90 CONSERVATION ACTIVITIES IN THE WATERSHED ….…………………… 92 Conservation Organizations ………………………………………………………... 92 Activities in the Watershed ………………………………………………………… 94 Agricultural/Forestal Districts ……………………………………………………... 95 Conservation Lands and CREP ……………………………………………………. 96 Conservation Practice Installation …………………………………………………. 97 CURRENT AND FUTURE CONDITIONS ………………………………………... 98 SUMMARY ………………………………………………………………………....... 101 CONCLUSIONS …………………………………………………………………....... 103 RECOMMENDATIONS ……………………………………………………………. 105 REFERENCES ………………………………………………………………………. 107 REPORT AUTHORS, CONTRIBUTORS and REVIEWERS …………………… 110 APPENDICES Appendix A: Map Sources ………………………………………………………… A-1 Appendix B: Sociological/Community Considerations and Strategy Options ……. B-1 iii List Of Figures Figure Page 1 – Location of North Fork Shenandoah River Watershed……………………………. 2 2 – Watershed Map with 10-digit Subwatershed Boundaries ………..……………….. 3 3 – 2001 Land Cover Data …………………………………………………………….. 4 4 – Average Annual Precipitation Ranges …………………………………………….. 5 5 – Geology ……………………………………………………………………..……... 7 6 – STATSGO Soil Map Units ………………………………………….…….............. 9 7 – Elevation and Slope Ranges (10m Data)…………………………….…………...... 10 8 – Soil Erosion Potential ……………………………………………………………... 11 9 – Hydric Soils and NWI Wetlands ….…………………………………….………… 12 10– Prime and Statewide Important Farmland ...…………………………………...…. 13 11 – Prime and Statewide Important Farmland by Percent of Watershed …………….. 13 12 – Flow Gauging Stations and Groundwater Monitoring Site ……………………… 15 13 – Flow Data for Linville Creek …………………………………………………….. 16 14 – Flow Data for North Fork of Shenandoah River ………………………………… 16 15 – Flow Data for Passage Creek …………………………………………………….. 17 16 – Shenandoah Salamander, Plethodon shenandoah ……………………………….. 21 17 – Threatened and Endangered Species Sample Sites and Cold Water Streams……. 22 18 – Bailey’s EcoRegions ……………………………………………………………... 23 19 – Potential and Confirmed Habitat for Tier I Species in Virginia …………………. 23 20 – Corn Grown in the Shenandoah Valley ………………………………………….. 24 21 – Example of a Dead Bird Composter …………….……………………………….. 25 22 – Sacrifice Lot …………………………..………………………………………….. 26 23 – Frost-proof Trough for Livestock Water ………………………………………… 27 24 – North Fork Shenandoah River - Shoemaker River (PS-K) - Land Use and Features …………………………………………………………… 28 25 – Smith Creek (PS-L) - Land Use and Features ..………………………………….. 30 26 – North Fork Shenandoah River - Linville Creek (PS-M) – Land Use and Features …………………………………………………………… 32 27 – Stony Creek (PS-N) - Land Use and Features …………………………………… 34 28 – North Fork Shenandoah River - Narrow Passage Creek (PS-O) – Land Use and Features …………………………………………………………… 36 29 – Cedar Creek (PS-P) - Land Use and Features ……………………………………. 38 30 – North Fork Shenandoah River - Passage Creek (PS-Q) – Land Use and Features …………………………………………………………… 40 31 – Change in Acreage of Urban Land 1992-2001 …………….…………………….. 45 32 – Change in Acreage of Agricultural Land 1992-2001 ……………………………. 45 33 – Land Cover in 1992 and 2001 by NLCD Data Classes ………………………….. 46 34 – Impaired Streams, Monitoring Stations, and NPDES Discharge Points ………… 50 35 – The North Fork Shenandoah River at Red Banks in Shenandoah County ………. 51 36 – Water Quality Trends for Bacteria ………………………………………………. 52 37 – Water Quality Trends for Total Nitrogen ………………………………………... 52 38 – Water Quality Trends for Total Phosphorus ……………………………………... 52 iv List of Figures (cont.) Figure Page 39 – Water Quality Trends for Total Suspended Solids ………………………………. 52 40 – Water Quality Trends for Dissolved Oxygen ……………………………………. 52 41 – Water Quality Trends for Oxidized Nitrogen ……………………………………. 52 42 – Water Quality Trends for pH …………………………………………………….. 53 43 – Water Quality Trends for Temperature ………………………………………….. 53 44 – Water Quality Trends for Total Kjeldahl Nitrogen ……………………………… 53 45 – Citizen Monitoring ………………………………………………………………. 55 46 – TMDL Implementation Plans ……………………………………………………. 56 47 – 12-Digit Hydrologic Units within the Watershed ………………………………... 57 48 – Animal Feeding Operations - Confined Chickens during a Cycle ………………. 58 49 – Animal Feeding Operations - Confined Turkeys during a Cycle ………………... 58 50 – Animal Feeding Operations - Confined Beef ……………………………………. 59 51 – Animal Feeding Operations - Unconfined Beef ………………………………….