Wetland Delineation Report-2013 - Laserfiche WebLink

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�acobson Environmental, PLLC www.jacobsonenvironmental.com Environmental Consultants Wayne.7acobson, P.S.S., W.D.C., P.W.S.,A.F.S. ------------------------------------------------------------------------------------------------------------ 5821 Humboldt Avenue North, Brooklyn Center, MN 55430 (612) 802-fi619 Cell Email: jacobsonenv@msn.com F12 Iron-Manganese Masses. On flood plains, a layer 4 inches or more thick with 40 percent or more chroma of 2 or less and 2 percent or more distinct or prominent redox concentrations occurring as soft iron-manganese masses with diffuse boundaries. The layer occurs entirely within 12 inches of the soil surface. Iron-manganese masses have value and chroma of 3 or less. Most commonly, they are black. The thickness requirement is waived if the layer is the mineral surface layer. User Notes: These iron-manganese masses generally are small (2 to 5mm in size) and have value and chroma of 3 or less. They can be dominated by manganese and therefore have a color approaching black. The low matrix chroma must be the result of wetness and not be a weathering or parent material feature. tron-manganese masses should not be confused with the larger and redder iron nodules associated with plinthite or with concretions that have sharp boundaries. This indicator occurs on flood plains along rivers, such as the Apalachicola, Congaree, Mobile, Savannah, and Tennessee Rivers. Hydroloqv The presence of current wetland hydrology was determined through direct observation of free water in the excavated soil pit, saturated soil conditions or soil redoximorphic features. However, the effect of on-or off-site hydrologic alterations may not always fully be accounted for when routine delineation methods are used. In the Midwest Region, hydrology indicators are in four groups: A) indicators based on the direct observation of surface water or groundwater during a site visit Indicator A1: SurFace water Category: Primary General Description: This indicator consists of the direct, visual observation of survace water(flooding or ponding)during a site visit. Indicator A2: High water table Category: Primary General Description: This indicator consists of the direct, visual observation of the water table 12 in (30 cm)or less below the surface in a soil pit, auger hole, or shallow monitoring well. This indicator includes water tables derived from perched water, throughflow, and discharging groundwater(e.g., in seeps)that may be moving laterally near the soil surface. Indicator A3: Saturation Category: Primary General Description: Visual observation of saturated soil conditions12 in. (30cm) or less from soil surface as indicated by water glistening on the surfaces and broken interior faces of soil samples removed from the pit or auger hole. This indicator must be associated with an existing water table located immediately below the saturated zone; however, this requirement is waived under episaturated conditions if there is a restrictive soil layer or bedrock within 12 in. (30 cm) of the surface. B)indicators of evidence that the site is subject to flooding or ponding Indicator B1: Water marks Category: Primary General Description: water marks are discolorations or stains on the bark of woody vegetation, rocks, bridge supports, buildings, fences, or other fixed objects as a result of inundation. Wetland Delineation-Mitigation-Permitting-Monitoring-Banking-Functional Analysis-T&E Surveys g Phase I Environmental Assessments-EAW's-Soil ID-Soil Analysis& Delineation-Environmental Referrals Pond &Lake Weed Control & Fish Stocking-Tree Surveys-Natural Resource Management Plans