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Technical Soil Services for Compliance: CASE STUDIES

Technical Soil Services for Compliance: CASE STUDIES. Martin Rosek, SSS Michigan. Preliminary Technical Determination (PTD) of Wetlands. Done in the office using: Archive of Imagery Soils Maps National Wetlands Inventory (NWI). Wetland Identification NFSAM part 514.3.

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Technical Soil Services for Compliance: CASE STUDIES

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  1. Technical Soil Services for Compliance: CASE STUDIES Martin Rosek, SSS Michigan

  2. Preliminary Technical Determination (PTD) of Wetlands Done in the office using: • Archive of Imagery • Soils Maps • National Wetlands Inventory (NWI)

  3. Wetland IdentificationNFSAM part 514.3 • Wetlands are identified through the confirmation of three diagnostic factors: • A predominance of hydric soil • The prevalence of hydrophytic vegetation • Wetland hydrology Wetlands must meet the definition of all three wetland factors (soils, plants, hydrology).

  4. Wetland Labels • Wetlands (W) • Manipulated Wetlands (WX) • Artificial Wetland (AW)

  5. Non-Wetland Labels • Non-Wetlands (NW) • Prior Converted Cropland (PC) • Farmed Wetland (FW) • Farmed Wetland Pasture or Hayland (FWP) Converted and farmed or used for pasture before December 23, 1985

  6. Wetlands Converted after December 23, 1985 • Converted Wetlands (CW or CW + Year) • Converted Wetland Technical Error (CWTE) • Third-Party Conversion Exemption (TP)

  7. Case Study 1 Preliminary Technical Determination

  8. Soil Map

  9. National Wetlands Inventory

  10. Case Study 1 Sample Site

  11. Wetland Hydrology

  12. Hydrology and Vegetation • Wetland Hydrology Indicators • Sparsely Vegetated Concave Surface - Primary • Surface Soil Cracks – Secondary • Geomorphic Position – Secondary • FAC – Neutral Test • Wetland Hydrology Present • Hydrophytic Vegetation Present

  13. Soil Profile

  14. Hydric Soil Indicators • Depleted Matrix (F3) • Redox Depressions (F8) • Hydric Soil Present • Sampled Area is within a Wetland

  15. Case Study 2 Preliminary Technical Determination

  16. Hydric Soil Map Units • 7 CFR (Code of Federal Regulations) Part 12.31states “If a soil map unit contains inclusions of hydric soils, that portion of the soil map unit identified as hydric soil shall be determined to have a predominance of hydric soils”.

  17. Soil Map

  18. Case Study 2 Sample Site

  19. Soil Profile

  20. Wetland Indicators • No Wetland Hydrology Indicators Present • No Hydrophytic Vegetation Present • No Hydric Soil Indicators Present Sampled Area is NOT within a Wetland

  21. Case Study 3 Preliminary Technical Determination

  22. 2011 Imagery

  23. Soils

  24. Case Study 3 Sample Site

  25. Iron Deposits

  26. Wood on Surface of Cultivated Site

  27. Hydrology and Vegetation Wetland Hydrology Indicators • Iron Deposits – Primary • Sparsely Vegetated Concave Surface - Primary • Surface Soil Cracks – Secondary • Geomorphic Position – Secondary Wetland Hydrology Present Hydrophytic Vegetation Present at nearby site (Case Study 1)

  28. Soil Profile

  29. Hydric Soil Indicators • Depleted Below Dark Surface (A11) • Loamy Gleyed Matrix (F2) • Depleted Matrix (F3) • Redox Dark Surface (F6) Hydric Soil Present Sampled Area within a Wetland. The site remains a CW+2011.

  30. Case Study 4 Preliminary Technical Determination

  31. NAIP 2005 NAIP 2009

  32. Soils Map

  33. Case Study 4 Sample Site Site Looking south Reference site looking North

  34. Hydrology and Vegetation • Hydrology • Geomorphic Position – Secondary • FAC-Neutral Test – Secondary Wetland Hydrology Present • Hydrophytic Vegetation Present (at reference site)

  35. Soil Profile

  36. Hydric Soil Indicators • Depleted Below Dark Surface (A11) • Loamy Gleyed Matrix (F2) • Hydric Soil Present

  37. Final Technical Determination • Upon further discussion with the producer, the trees that were cleared was a drainage ditch that existed before December 23, 1985. Imagery from 1985 confirmed that the ditch did exist before December 23, 1985. The CW+09 label was changed to PC.

  38. Case Study 5 Preliminary Technical Determination

  39. Case Study 5 Sample Site

  40. Soil Profile

  41. Hydric Soil Indicators • Depleted Below Dark Surface (A11) • Depleted Matrix (F3) • Hydric Soil Present

  42. Hydrology and Vegetation • Hydrophytic Vegetation Present • No Wetland Indicators Present • Sampled Area is not within a Wetland.

  43. Case Study 6 Preliminary Technical Determination All forested area wetland.

  44. Final Technical Determination

  45. Case Study 7 Preliminary Technical Determination

  46. Soils

  47. Final Technical Determination

  48. Case Study 7 Preliminary Technical Determination

  49. Soil Map

  50. Minimum requirement to be labeled HEL • If a field is ≥ 1/3 HEL, or has ≥ 50 acres HEL, the field is labeled HEL • If a field labeled HEL is split, for one of the new fields to be labeled NHEL, the field must be 100% NHEL. There must be no net loss HEL from a field originally labeled HEL.

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