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� <br /> ' MLRA OFFICE RESPONSIBLE:St.Paul,Minnesota <br /> � SERIES ESTABLTSHED:Le Sneur Connty,Minnesota, 1944. <br /> REMARKS:Diagnostic horizons and featnres recognized in this pedon aze:mollic epipedon-the zone from the <br /> ' s�u�'ace to 13 in�hes(A and AB horizons);azgillic horizon-the zone from 13 to 41 inches(Bt horizons);aquic <br /> sabgronp-hue of lOYR and chroma of 2 immediately below mollic epipedon. <br /> � Somewhat poorly drained matches d�th to redox(2 chroma at 17 inches)and taxonomic class(Aquic subgroup) <br /> clos�than the previons modaately well drainod class. <br /> ' <br /> � . . . . . <br /> Clarification of Cowardin Classification <br /> � and Circular 39 <br /> Wetland Types 1, 1L, 2, 3 and 7 <br /> � <br /> sy <br /> , Franklin J. Svoboda <br /> Svoboda Ecological Resources <br /> 2477 Shadywood Road, Suite 100 <br /> L Excelsior, MN 55331 <br /> (952)471-1100 <br /> franks�gpsinnovations.com <br /> , Intr ucti n <br /> od o <br /> � The National Wetland Inventory (NWI) mapping process completed in Minnesota between 1979 <br /> and 1982 developed a wetlands inventory map for the state of Minnesota. ut�izing remotely <br /> sensed color inErared photography that was visually interpreted. The interpretation process <br /> , hierarchically classified wetlands using, at the time, the recently published Cowardin <br /> classification system(Cowardin et a1 1979). The wetland interpretation and classification process <br /> ' was ground verified using selective plots and locations but was field verified to only a lixruted <br /> extent. Consequently, the published NWI paper copies carry the disclaimer that these maps are to <br /> be used for advisory purposes only and actual classifications are to be based on ground <br /> ' verification. Visual ir►terpretation from remote sensed imagery has some linutations particularly <br /> with regard to the water regime �difier. Year to year variation in precipitation cycles along <br /> with the occutrence of precipitation events at the time that the in�agery was acquired, even if all <br /> ' acquisition occurred during the spring season, can result in variations in modifier categorization. <br /> Accurate classification becomes critical when regulatory decisions are being made with regard to <br /> , the wetland type and the amount of de minimum fill that is permissi�ble. Also, it is a matter of <br /> Svoboda Eoological Resources 2180 Abingdon Way <br /> Project No. 2007-056-03 Orono,Minnesota <br /> � <br />