Laserfiche WebLink
� i � <br /> � PC Exhibit C , <br /> WETLAND CONSERVATION ACT <br /> .�� Wetland Delineations: <br /> Minn <br /> w��s� � Choosing the Appropriate Method <br /> Resources <br /> BWSR Technical Guidance,July 1,2010 <br /> Background <br /> The 1987 U.S. Army Corps of Engineers Wetland Delineation Manual (87 Manual) describes two <br /> general types of delineation methods: routine and comprehensive (see Part IV, Section 3 of the 87. <br /> Manual). The routine method includes three options, or"levels," of investigation: <br /> • Level 1-Onsite Inspection Unnecessary <br /> • Level 2-Onsite Inspection Necessary <br /> • level 3-Combination of Levels 1 and 2 <br /> The comprehensive method requires a more rigorous investigation and more detailed . <br /> documentation. The 87 Manual provides general guidance on which level to use, but does not <br /> address circumstances relating to the implementation of the Minnesota Wetland Conservation Act <br /> (WCA), including instances where a delineation mav not be necessarv to determine the applicability <br /> of a specific rule provision. This guidance is intended to provide assistance in selecting the <br /> � appropriate method and level of wetland delineation method to use in various situations related to <br /> implementation of WCA. The actual method and level will vary from site to site and project to <br /> project. Corps of Engineers requirements may also differ due to federal Clean Water Act provisions. <br /> Routine Delineations <br /> The routine wetland delineation method is appropriate for the vast majority of situations relating to <br /> WCA. The routine method involves the use of simple, rapidly applied techniques to obtain qualitative <br /> data which is then used to make a determination. <br /> Routine Level 1: Onsite inspection unnecessary. <br /> The Routine Level 1 delineation may be appropriate when there is sufficient offsite information to . <br /> make a determination for a particular activity or site. Level 1 is generally used when the exact <br /> boundary of a wetland is not critical. It is also often used to determine wetland type, although in <br /> many cases an on-site inspection may be necessary to determine type. A Level 1 review typically <br /> consists of an examination of common offsite mapping resources (soils, topography, National <br /> Wetland Inventory, aerial photos, etc.) to determine the potential presence of a wetland, identify its <br /> type, and/or sketch its approximate boundaries. Use of the Wetland Mapping Conventions for <br /> Cropland" (BWSR, USACE, and NRCS, 1994) is a common application of a Routine Level 1 delineation <br /> procedure in Minnesota. <br /> 1 <br />