Wetland Conservation Act Notice of Application/Notice of Decision

Home Browse Search

Environmentai Cansultants Wayne]acobson, P.S.S.,W.D,C., P.W.S.,A.F.S. ------------------------------------------------ 5821 Humboldt Avenue North,8rooklyn Center, MN 55430 (612) 802-6619 Cel! Email: jacobsonenv@msn.com F92 Iron-Man.ganese Masses. On flood plains, a layer 4 inches or more thick with 40 percent or more chroma of 2 or Eess and 2 percent or mare 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 lass. Most commonly, they are black. The thickness requirement is waived if the layer is the minerai surface layer, User Notes:7hese iron-manganese masses generally are smal! (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. Iron-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 ffood plains along rivers, such as the Apalachicola, Congaree, Mobile, Savannah, and Tennessee Rivers. ', HvdroJoqv � The presence of current we#iand hydrology was deterrnined 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 fuily be accounted for when routine delineation methods are used. In the Midwest Region, hydrology indicators are in faur groups: A)indicators based on the direct observation of surface water or groundwater during a site visit lndicator A1: Surtace water Category: Primary General Description: This indicator consists of the direct, visual observation of sunrace 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 tabfes 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 Generat Description: Visual observation of saturated soil conditions92 in. (30cm)or less from soil surface , as indicated by water glistening on the surfaces and brofcen interior faces of soil samples removed from ttie pit or auger hole. This indicator must be associated with an existing water table focated 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. 8) indicators of evidence that the site is subject to flooding or panding 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&pelineation-Environmental Referrafs Pond &Lake Weed Control &Fish Stocking-7ree Surveys-Nakural Resource Management Plans