Table of Contents

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Table of Contents

    I.  Watershed Setting

       A.  Location

      B.  Geology

             1. Pre-Glacial

             2. Glacial

             3. Formation of Darby Creeks

             4. Darby Plains            

       C.  Soils

            1. Ohio Soil Regions

            2. STATSGO Soils

            3. Detailed Soils Mapping        

      D.  Topography

       E.  Infrastructure

             1.  County Maintained Ditches

             2.  Low Head Dams

             3.  Roads

       F.  Climate and Precipitation

       G.  Water Resources

            1. Streams and Subwatersheds

            2. 100 Year Floodplain

            3. Boating Access

            4. Groundwater

            5. Groundwater Pollution Potential (DRASTIC Mapping)

   II.     Land Use in Darby Creek Watershed

      A.  General Land Use Data

            1.  Land Use Data Sources

            2. Hybrid Land Use

            3.  Land Use Change

            4. Land Use Change Impacts

        B.  Residential

            1. Townships/Cities/Villages

            2. Population

            3. Population Change

            4. Household Change

            5. Public Water Supplies

6. Onsite Wastewater Treatment Systems

            7. Central Sewers Systems

      C. Agriculture

            1. General Statistics

a. Number of Farms

b. Livestock

            2.  Agricultural Soils

a. Prime Farmland

b. Highly Erodible Soils

3. Soil Conservation

a. Conservation Tillage

            4. Conservation Practices

                        a. History of Hydrologic Unit Area

                        b.  Agricultural Districts

                        c.  Conservation Reserve Program(CRP)

                        d. Environmental Quality Incentive Program(EQIP)

                        e. Darby Low Interest Loans

                        f. Conservation Reserve Enhancement Program(CREP)

      D. Forested Land

            1. Forested Land Use Data

            2. Forest Cover Canopy and Type

            3. Wildlife Habitat Incentive Program (WHIP)

      E. Gravel Pits

      F. Wetlands

            1. Wetland Land Use Data

            2. Wetland Reserve Program (WRP)

      G. Parks, Preserves, and Historical Sites

            1. Public Parks and Reserves

            2. Scenic Rivers

            3. Historical Locations

       H.  Planning and Zoning

            1. Zoning

            2. Comprehensive Plans

            3. Subdivision Review Process

            4. County Profiles on Land Use Change

III.  Environment and Natural Resources

      A.   Vegetation

1. Historic Vegetation

              2. Rare or Threatened Vegetation

B.   Wildlife

1. Species of Mammals

2. Species of Reptiles and Amphibians

3. Species of Mussels

4. Species of Fish

5. Species of Birds

         C.  Invasive Species

 IV.  Water Quality

A. Watershed Features

            1. Streams

            2. Gradient

            3. Stream Buffers

                        a. Agricultural Stream Buffers

                        b. Urban and Residential Stream Buffers

                        c. Effectiveness of Grass Filter Strips

                        d. Darby Creek Stream Buffer Widths

            4. Stream Modifications

       B. Water Quality Data

            1. Sampling Sites

            2. Water Quality Attainment

            3. Aquatic Life Standards        

                        a. Aquatic life use designations

                        b. Aquatic life use indices

            4. Attainment Status

            5. Stream Habitat Assessment

            6. Water Quality Sampling Trends

7. Spills

            8. Log Jams

            9. Livestock Access

          10. NPDES Permits

          11. Landfills or Chemical Sites

    V. Works Cited

    VI. Appendices

        A. Highly Erodible Soils

        B. Slope of Soils

        C. Prime Farmland Ratings

        D. County Maintained Ditch Data

        E. Public Water Supplies

        F. Ohio Historical Locations

        G. County Zoning Rules and Planning Recommendations

        H. Environmental and Natural Resources (Species Lists)

        I.  2001-2002 Ohio EPA Sampling Results

        J.  Historical (1979 2002) Darby Watershed Sampling Results

       K.  2001 2002 Ohio EPA bacteria sampling results

       L.  Fish Kills in Darby Watershed

       M. Landowner Survey 2002

       N.  NPDES Narratives

List of Figures: 

 I. Watershed Setting

1. Watershed Acreage

2. Soils Regions Map  (This links directly to the pdf file)

3. Summary of Ohio Soil Regions

4. STATSGO Soil Associations

5. Darby Creek Watershed Erodibility Summary 

6. Erodibility of Agricultural Land by Major Subwatershed

7. Darby Creek Watershed Slope Summary

8. Percent Slope of Agricultural Land by Major Subwatershed

9. County Maintained Ditch Actions

10. County Maintained Ditches

11. Weather Data

12. Darby Creek Watershed Tributary Data

13. 14 Digit Subwatershed Drainage Area

14. Boating Access Locations and Hazards

II. Land Use

15. Land Use Data Sources

16. Hybrid Land Uses

17. Hybrid Land Use by Subwatersheds

18. Research Summary on Impervious Surface and Water Quality

19. Summary of the Impacts of Urbanization

20. Municipalities in the Watershed

21. Census 2000 Population Data

22. Percent Future Population Growth

23. Unregulated Growth Scenarios (OSU, 2001)

24. Population Change for Municipalities

25. Housing Change 1990 to 2000

26. Comparison between Housing and Population Change

27. On-Site Wastewater Treatment 

28. Percent Soils Suitable for On-Site Wastewater Treatment Systems

29. Aerators by County

30. Central Sewer Access

31. Areas Served by Central Sewer

32. Top Ten County Producers

33. Cropland Comparison

34. Irrigated Farms

35. Farm Data

36. Average Farm Size 

37. Percent Change in Farms by Size

38. Fertilizers and Chemicals Applied

39. Number of Farms and Acres in Watershed

40. County Livestock Totals

41. Nutrient Management Plans

42. Darby Creek Prime Soils

43. Farmland Ratings by Major Subwatershed

44. Erodibility of Agricultural Land by Major Subwatershed

45. Conservation Tillage by County

46. Agricultural Districts

47. CRP Acres in Darby Watershed 1990-1992

48. Present Enrollment in CRP

49. New CRP Contracts in Darby Watershed

50. EQIP Contracts 2001 - 2004

51. Darby Low Interest Loan Statistics

52. Darby Loan Interest Loan Practices 1996 - 2003

53. Forest Cover Types and Canopy Percentages

54. Summary of Forest Vegetation in Watershed

55. Wetland Reserve Program Statistics

56. Bigelow Cemetery Plant Species

57. Smith Cemetery Plant Species

58. ODNR Scenic River Easements

59. National Historical Sites

60. Archeological Sites in Darby Watershed

61. Zoning Capabilities (Stamm, 1999)

62. Comprehensive Plans

III. Environment and Natural Resources

63. Natural Heritage Database: Vegetation (2004)

64. Natural Heritage Database: Mussels (2004)

65. Natural Heritage Database: Fish (2004)

66. Natural Heritage Database: Nesting Birds (2004)

67. State and Federally Protected Birds Sighted at Big Darby Metropark

68. Invasive Species in the Darby Watershed

IV.  Water Quality

69. Stream Miles Analyzed by County

70. Gradient of Selected Ohio Streams

71. Gradient of Darby Watershed Streams

72. Riparian Buffer Width Goals

73. Recommended Widths for Vegetated Stream Buffers

74. Agricultural Riparian Buffer Model

75. Three Zone Urban Buffer

76. Three Zone Backyard Buffer

77. Average Percent Removal of Pollutants in Runoff

78. Predicted Pollutant Removal in Runoff

79. Darby Watershed Stream Buffer Information

80. Grassed Buffer Widths

81. 100ft or Greater Buffer by County

82. Darby Watershed Stream Modifications

83. No Evident Impact

84. Channelized Agriculture and No Trees along Stream Bank

85. Channelized (Agriculture and Development)

86. No Trees along Stream

87. Darby Watershed Sampling Sites by County

88. Streams with Proposed Coldwater Habitat Use Designations

89. Attainment Status of Designated or Recommended Use

90. Ohio Aquatic Life Use Designations

91. Darby Creek Watershed Landfill and Contamination Sites

 List of Maps:

1. Detailed Watershed Map

2. Glacial Setting

3. Glacial Geology in West Central Ohio

4. Generalized Soils

5. Major Subwatershed Boundaries

6. National Elevation Data

7. County Maintained Ditches

8. Subwatershed Boundaries

9. 100 Year Floodplain

10. Glacial Groundwater Yields

11. Hybrid Land Use (2004)

12. Population Change (1990 2000)

13. Areas Served by Central Sewer

14. 20 Year Wastewater Facility Planning Area

15. Gravel Pits

16. Preserves and Parks

17. Historic Vegetation in West Central Ohio

18. Stream Buffers in Darby Watershed

19. Proposed Aquatic Life Use Designations

20. Attainment Status of Streams in Watershed

21. Ohio EPA Sampling Data Trends (Fish and Bugs)

22. Ohio EPA Permitted Point Sources (NPDES)

Appendix Maps:

Appendix A: 

A-1. Upper Big Darby Highly Erodible Soils

A-2. Middle Big Darby Highly Erodible Soils

A-3. Lower Big Darby Highly Erodible Soils

A-4. Little Darby Highly Erodible Soils

Appendix B:

B-1. Upper Big Darby Slope Ratings

B-2. Middle Big Darby Slope Ratings

B-3. Lower Big Darby Slope Ratings

B-4. Little Darby Slope Ratings

Appendix C:  

C-1. Upper Big Darby Farmland Ratings

C-2. Middle Big Darby Farmland Ratings

C-3. Lower Big Darby Farmland Ratings

C-4. Little Darby Farmland Ratings

Appendix E: 

E-1. Public Well Supplies Logan

E-2. Public Well Supplies Union

E-3. Public Well Supplies Champaign

E-4. Public Well Supplies Madison

E-5. Public Well Supplies Franklin

E-6. Public Well Supplies - Pickaway


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Last updated: April 7, 2009.