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Jacobson Environmental, PLLC www.jacobsonenvironmental.com <br /> Environmental Consultants Wayne Jacobson, P.S.S.,W.D.C., P.W.S.,A.F.S. <br /> 5821 Humboldt Avenue North, Brooklyn Center, MN 55430 (612)802-6619 Cell <br /> Email: jacobsonenvOmsn.com <br /> A hydric soil is a soil formed under conditions of saturation, flooding, or ponding long enough during the <br /> growing season to develop anaerobic conditions in the upper part. If a soil exhibits the indicators of a <br /> hydric soil or is identified as a hydric soil the hydric soil criterion is met. <br /> The break between hydric and non-hydric soils was determined by excavating soil pits along transects <br /> crossing the wetland/upland eco-tone and evaluating the soil colors, textures, and presence or absence of <br /> redoximorphic indicators(i.e., mottles, gley or oxidized rhizospheres). Hydric Soil Indicators for the <br /> Midwest Region were noted as presented in the National Technical Committee for Hydric Soils Field <br /> Indicators of Hydric Soils in the United States version 7.0(USDA NRCS 2010) if present at each sample <br /> point. Also, upper soil profiles were compared to the mapped or inclusionary soil series found in the <br /> sample area for soil identification purposes. <br /> Cautions used in applying the Field Indicators of Hydric Soils <br /> There are hydric soils with morphologies that are difficult to interpret. These include soils with black, gray, <br /> or red parent material; soils with high pH; soils high or low in content of organic matter; recently <br /> developed hydric soils, and soils high in iron inputs. In some cases we do not currently have indicators to <br /> assist in the identification of hydric soils in these situations. As long as the soil meets the definition of a <br /> hydric soil, the lack of an indicator does not preclude the soil from being hydric. The indicators were <br /> developed mostly to identify the boundary of hydric soil areas and generally work best on the margins. <br /> Not all of the obviously wetter hydric soils will be identified by the indicators. Redoximorphic features are <br /> most likely to occur in soils that cycle between anaerobic (reduced)and aerobic(oxidized)conditions. <br /> Morphological features of hydric soils indicate that saturation and anaerobic conditions have existed <br /> under either contemporary or former hydrologic regimes. Where soil morphology seems inconsistent with <br /> the landscape, vegetation, or observable hydrology, it may be necessary to obtain the assistance of an <br /> experienced soil or wetland scientist to determine whether the soil is hydric. <br /> To clarify on some Hennepin County sites, <br /> 1 Many of these soils have black or gray parent materials <br /> 2 Many of the soils have a high organic matter content <br /> 3 The hydric soil margin is typically higher than the wetland boundary margin on the site <br /> 4 Not all of the obviously wetter soils will be identified by the indicators <br /> 5 Many of the hydric soils are Mollisols which are classic problem hydric soils in many cases <br /> Wetland Classification <br /> Wetland Delineation-Mitigation-Permitting-Monitoring-Banking-Functional Analysis-T&E Surveys 3 <br /> Phase I Environmental Assessments-EAW's-Soil ID-Soil Analysis&Delineation-Environmental Referrals <br /> Pond & Lake Weed Control &Fish Stocking Tree Surveys-Natural Resource Management Plans <br />