Janis Ruhser 20250909 Vector Digital Data Set (Polygon) https://doi.org/10.5066/P13A9UPL The U.S. Army Corps of Engineers' Upper Mississippi River Restoration (UMRR) program, through its Long Term Resource Monitoring (LTRM) element, collected aerial imagery of the systemic Upper Mississippi River System (UMRS) during the summer of 2020. A Land Cover/Land Use (LCU) spatial database was developed based on the 2020 aerial imagery, which adds a fourth systemic-wide database to the existing 1989, 2000, and 2010/11 LCU databases. These data have been used to create a variety of products, one of which is a data set used to classify aquatic areas. The 2020 aquatic areas data sets were created by first generalizing the available land cover/use data into a land/water data set, then reinterpreting the areas classified as water to determine the type of aquatic area. This level 1 aquatic areas data set was then further modified to produce the level 2 aquatic areas data set. The intent of the second level classification is to further distinguish geomorphic features not easily interpreted visually. Bathymetric and land cover data, automated approaches, and imagery layers were used to reclassify select level 1 classes for level 2. The Contiguous Floodplain Shallow Aquatic and Contiguous Impounded classes were reclassified to Contiguous Floodplain Lake and Side Channel. Existing and newly delineated Side Channels were further classified into Side Channels and Tertiary Channels. Area coverage for this data set is the Upper Mississippi River floodplain between Minneapolis, MN and Cairo, IL, and the Illinois River floodplain from its confluence with the Mississippi to Joliet, IL. The Upper Midwest Environmental Sciences Center administers the US Army Corps of Engineers' Upper Mississippi River Restoration (UMRR) Program, Long Term Resource Monitoring (LTRM) element, authorized under the Water Resources Development Act of 1986 (Public Law 99-662). The mission of the UMRR-LTRM is to provide decision-makers with information to maintain the Upper Mississippi River System (UMRS) as a viable large river ecosystem given its multiple-use character. The long-term goals of the program are to understand the system, determine resource trends and impacts, develop management alternatives, manage information, and develop useful products. The creation and distribution of aquatic areas data for the UMRS aids the Center in meeting these goals. Aquatic areas delineations are not to be used for any navigational purposes. 20100801 20110831 ground condition Complete None planned -91.3201 -91.1955 43.8839 43.5716 None Main Channel Backwater Impoundment Navigation Channel Shallow Floodplain Alexandria Digital Library Feature Type Thesaurus wetlands USGS Thesaurus water resource management USGS Metadata Identifier USGS:682f739cd4be0244778123aa None Mississippi River Common geographic areas Wisconsin Minnesota None None U.S. Geological Survey, Midwest Region Janis Ruhser Biologist mailing address

2630 Fanta Reed Road

La Crosse WI 54603 USA 608-781-6381 608-783-6066 jruhser@usgs.gov US Army Corps of Engineers' Upper Mississippi River Restoration Program- Long Term Resource Monitoring element and USGS's Upper Midwest Environmental Sciences Center Microsoft Windows 11 Enterprise; ArcGIS Pro 3.3.1 A check is performed to ensure every polygon has an attribute code and that it is a valid code. All polygon features are checked for topology using ArcGIS Pro. The aquatic areas Level 2 covers the full extent of the original 2020 Aquatic Areas used as the input data source. The horizontal positional accuracy was tested against the base layer data. No additional tests were performed Not applicable. UMESC 20231228 Vector Digital Data Set La Crosse, WI U.S. Geological Survey https://doi.org/10.5066/P9X3UT0T Digital and/or Hardcopy Resources 20200811 20200826 ground condition Aqa orig Source information Level 1 Aquatic Areas data UMESC 20211004 Vector Digital Data Set La Crosse, WI U.S. Geological Survey https://doi.org/10.5066/P9U46VQP Digital and/or Hardcopy Resources 20200811 20200826 ground condition 2020 LCU Source information used for Open Water delineations James T. Rogala 20190725 raster digital data https://doi.org/10.5066/P92PSPHG Digital and/or Hardcopy 19890101 20091231 ground condition Bathymetry Historic bathymetry layer used primarily in the 2010 Level 2 Aquatic Areas, which in turn are used as an informative dataset in developing the 2010 Level 2 Aquatic Areas. Janis J. Ruhser Benjamin C. Finley 20211004 raster digital data https://doi.org/10.5066/P962VKR4 Digital and/or Hardcopy 20200822 ground condition 2020 Imagery 2020 Imagery used in determining and delineating significant channels. The original 2020 Aquatic Areas data was used as the foundational layer for this Level 2 interpretation. Bathymetric and land cover data, automated approaches, and imagery layers were used to reclassify select level 1 classes for level 2. Open Water delineations from the 2020 Land Cover were extracted from that dataset and overlaid with the Aquatic Areas layer to assist in the further delineation of significant channels running through the Contiguous Floodplain Shallow Aquatic and Contiguous Impounded classes of the Aquatic Areas layer. Aqa orig 2020 LCU Bathymetry 2020 Imagery 20240910 Contiguous Floodplain Shallow Aquatic and Contiguous Impounded classes were reclassified to Contiguous Floodplain Lake and Side Channel. Existing and newly delineated Side Channels were further classified into Side Channels and Tertiary Channels. 20240917 Vector G-polygon 990 Universal Transverse Mercator 15 0.9996 -93.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS 1980 6378137.0 298.257222101 aqa_2020_p08_lvl2.shp Attribute Table Table containing attribute information associated with the data set. Producer Defined FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Shape type. AQUA_CODE Codes designating Aquatic Area features Producer Defined N Non-aquatic Producer defined IFL Isolated Floodplain Lake Producer defined TRC Tributary Channel Producer defined CFL Contiguous Floodplain Lake Producer defined SC Side Channel Producer defined CB Channel Border Producer defined MNC Main Navigation Channel Producer defined TSC Tertiary Channel Producer defined AQUA_DESC Text description of the AQUA_CODE attribute Producer Defined Non-aquatic Non-aquatic Producer defined Isolated Floodplain Lake Isolated Floodplain Lake areas have no hydraulic connection by surface gravity flow at reference river discharge. For mapping purposes, isolated means having no apparent surface water connection with the rest of the river (Wilcox, D. B. 1993). Producer defined Tributary Channel Tributary Channels are channels of tributary streams and rivers. The landward boundary is the line where the tributary crosses the study area boundary. The lateral boundaries are the apparent shorelines and any inundated natural bank lines. The riverward limit of a tributary channel is a line drawn across the downstream limits of the apparent shoreline or where the inundated natural bank lines of tributary channels merge with the surrounding bottom (Wilcox, D. B. 1993). Producer defined Contiguous Floodplain Lake Contiguous Floodplain Lake areas are hydraulically connected by surface gravity flow at reference river discharge. For mapping purposes, contiguous means having apparent surface water connection with the rest of the river (Wilcox, D. B. 1993). Level 2 aquatic areas redelineates the original aquatic areas classes of Contiguous Floodplain Shallow Aquatic and Contiguous Impounded into Contiguous Floodplain Lake, Side Channel, and Tertiary Channel. Producer defined Side Channel Side Channels are large channels that carry less flow than the main channel. Boundaries of secondary channel areas are the apparent shorelines and straight lines across the mouths of upstream and downstream limits of the apparent shorelines where secondary channels connect with other aquatic areas (Wilcox, D. B. 1993). Producer defined Channel Border Channel Borders are the areas between the navigation channel and the river bank. Boundaries of channel border areas are the apparent shorelines, the navigation channel buoy line, straight lines across the mouths of secondary and tertiary channels, and the inundated portions of the natural bank line (Wilcox, D. B. 1993). Producer defined Main Navigation Channel Main Navigation Channel is the designated navigation corridor marked by channel buoys. In reaches where buoys are not used, the centerline of the navigation channel is defined by lights and daymarks on shore that pilots use for navigation. The navigation channel on most of the UMRS is 91.4 m (300 ft) wide in straight reaches and 152.4 m (500 ft) wide in bends. The navigation channels in the upper pools of the UMRS and tributary waterways are narrower. The prescribed width and depth of at least 9 ft (2.6 m) are maintained by the navigation dams and by dredging where necessary. The navigation channel extends through the locks at each lock and dam. The navigation channel is usually in the main channel but in some reaches, it is located in secondary channels (Wilcox, D. B. 1993). Producer defined Tertiary Channel Side channels that are not directly connected to the main channel were generally reclassified as TSC. This Level 2 classification of SC was primarily done to create natural segments that allow for adding metrics in Level 3. The loose definition of TSC warrants some caution in its use as a standalone class in Level 2, and collapsing TSC back into SC is recommended if using Level 2 in a standalone manner (i.e., using without metrics from Level 3). Producer defined LAND_WATER Generalized land cover classification delineating land and water polygons. Producer Defined Land Land Producer defined Water Water Producer defined Perimeter Perimeter of polygon in meters Producer Defined 105.871560358 181673.17964 Meters Area Area of polygon in square meters Producer Defined 420.074653404 17822915.6072 Square Meters Acres Area of polygon in acres Producer Defined 0.103802292264 4404.12074345 Acres Hectares Area of polygon in hectares Producer Defined 0.0420074653404 1782.29156072 Hectares The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P13A9UPL None 20250909 U.S. Geological Survey, Midwest Region Janis Ruhser Biologist mailing address

2630 Fanta Reed Road

La Crosse WI 54603 USA 608-781-6381 608-783-6066 jruhser@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time