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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
Acknowledgements
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