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Environmental Resources Inventory

Potomac Subregion, January 1998

Environmental Resources Inventory Potomac Subregion (cover)Menu

Details of Publication
Introduction and Executive Summary
Existing Environmental Conditions
Regulatory and Policy Framework for Environmental Planning in the Potomac Subregion
References
Appendix
Tables
Figures

 

Details of Publication

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Introduction and Executive Summary
Description of the Potomac Subregion
Summary of Environmental Resources
Environmental Policy Framework

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Existing Environmental Conditions
Geology and Soils

  • Topography and Slopes
  • Mineral Resources

General Characteristics of Vegetation and Sensitive Areas

  • Forests
  • Wetlands
  • Habitats of Rare, Threatened, and Endangered Species and Areas Likely to Contain Unusual Biological Communities
  • Wildlife and Fish
    • Forest Interior and Riparian Forest Habitat
    • Grassland and Edge Habitat
    • Wildlife Management Concerns

Air Quality

Noise

Water and Sewer Service and Capacity

  • Sewer System Capacity
  • Water Treatment

The Potomac River

Tributary Watersheds of the Potomac Subregion

  • Lower Seneca
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Muddy Branch
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Watts Branch Mainstem
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Piney Branch
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Greenbriar Branch
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Sandy Branch
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Cabin John Creek
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands
  • Rock Run
    • Watershed Character
    • Water Quality
    • Sensitive Areas and Wetlands

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Regulatory and Policy Framework for Environmental Planning in the Potomac Subregion
Water Quality Management
Stormwater Management
Floodplain Management
Mineral Resources
State Smart Growth Initiatives
Sensitive Areas Protection and Biodiversity
Forest Conservation
Air Quality Policies and Regulations
Noise Regulation
Water Supply and Sewerage

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References

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Appendix
Environmentally Sensitive Areas
Wetlands Functional Assessment Methodology
Fish Species of the Potomac Subregion
Countywide Stream Protection Strategy Management Categories

  • Watershed Preservation Areas
  • Watershed Protection Areas
  • Watershed Restoration Areas
  • Urban Watershed Management Areas
  • Agricultural Watershed Management Areas

Calculating Existing Subwatershed Imperviousness
Determination of Significant Forest Blocks
Potomac Subregion Sewer and Water Status Report
Overview
County Council Actions on Sewer Service

  • Sewer Service in the Sandy Branch/Greenbriar Branch Basins
  • Sewer Service in the Piney Branch Basin
  • Sewer Service in Other Stage IV Areas

Soils Constraints
Sewer System Capacity
Water Treatment Issues
Detailed Discussion of Analysis Areas

  • Analysis Area 1 - The Darnestown Triangle
  • Analysis Area 2 - Sandy Branch Pump Station (WWPS) and Rich Branch Trunk Sewer
  • Analysis Area 3 - Sandy Branch and Greenbriar Branch
  • Analysis Area 4 - Piney Branch Basin

Water Quality Monitoring Summary Tables

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List of Tables

  1. Slopes of the Potomac Subregion
  2. Active Mines and Quarries
  3. Parkland, Natural Resources and Agriculture by Watershed Area
  4. Natural Resources and Agriculture in Parkland
  5. Forest Resources by Watershed Area
  6. Wetland Resources by Watershed Area
  7. Rare, Threatened, and Endangered Plant Species
  8. Chronology of Environmental Policy and Regulatory Actions
  9. Floodplain and Stormwater Management Responsibilities

A-1. Sensitive Resources
A-2. Wetland Assessment Group Functional Scores
A-3. Fish Species Collected in Various Watersheds
A-4. Summary of Percent Impervious Area
A-5. List of Forest Interior Dwelling Bird Species
A-6. Summary of Lower Seneca Stream Monitoring
A-7. Summary of Muddy Branch Stream Monitoring
A-8. Summary of Watts Branch Stream Monitoring
A-9. Summary of Cabin John Stream Monitoring
A-10. Summary of Rock Run Stream Monitoring

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List of Figures

  1. Potomac Subregion Vicinity Map
  2. Potomac Subregion and Watersheds Under Study
  3. Geologic Features
  4. Soils with Severe Septic System Limitations
  5. Forest Areas
  6. Traffic Noise Impact Areas
  7. Sewer Service Areas
  8. Water Service Areas
  9. Potomac River and Tributary Streams
  10. Countywide Stream Protection Strategy-Subwatershed Conditions
  11. Countywide Stream Protection Strategy-Management Categories
  12. Lower Seneca Sensitive Areas
  13. Muddy Branch Sensitive Areas
  14. Watts Branch Rapid Stream Assessment
  15. Watts Branch Sensitive Areas
  16. Cabin John Creek Sensitive Areas
  17. Rock Run and Potomac Direct Sensitive Areas
  18. Environmental Policy Sources to Guide Master Planning


A-1. Potomac Study Area Aerial Photograph Acquisition Dates
A-2. Potomac Study Area Subwatersheds

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