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  • Administrative and Political Boundaries
  • Cultural Demographic
    • Cemetery
    • Census 1980 County
    • Census 1990 County
    • Census 1990 Block Group
    • Populated Places
    • Census 2000 Block-Group
    • Census 2k BG House SF3 1
    • Census 2k BG House SF3 2
    • Census 2k BG Pop SF3
    • Census 2k T Pop SF1
    • Census 2k Incpl Occ Tenure HU 1990-2k
    • Census 2k Incpl Pop Lt17 Gt18
    • Census 2k Incpl Pop 1990-2k
    • Census 2k Incpl Social Profiles
    • Census 2k Incpl Median HH Income 1980-2k
    • Census 2k Incpl Age Hu 1990-2k
    • Census 2k Incpl Housing Profiles
    • Census 2k Incpl Poverty 1990-2k
    • Census 2k Incpl Own Occ Wchild Lt18 1990-2k
    • Census 2k Incpl Age Profiles 1990-2k
    • Census 2k Incpl Demographic Profiles
    • Census 2k Incpl Economic Profiles
    • Census 2k Incpl Median Rent Hu 1980-2k
    • Census 2k Incpl Pop 1850-2k
    • Census 2k Cnty Housing Profiles
    • Census 2k Cnty Ages 1990-2k
    • Census 2k Cnty Pop Gt18Yrs 1950-2k
    • Census 2k Cnty Farm Size 1969-97
    • Census 2k Cnty Age Hu 1940-2k
    • Census 2k Cnty Earnings Sex 1999
    • Census 2k Cnty Med Val Med Rent 1940-2k
    • Census 2k Cnty Demographic Profiles
    • Census 2k Cnty Age Farm Operators 2k
    • Census 2k Cnty Poverty 1969-99
    • Census 2k Cnty Education 1990-2k
    • Census 2k Cnty Age Groups Sex 1990-2k
    • Census 2k Cnty Hist Pop 1860-2k
    • Census 2k Cnty Swine 1950-97
    • Census 2k Cnty Pop Change 1990-2k
    • Census 2k Cnty Units Structure 1980-2k
    • Census 2k Cnty Hu Tenure 1940-2k
    • Census 2k Cnty Farm Size 1890-1997
    • Census 2k Cnty Hsh Group Qtrs 1990-2k
    • Census 2k Cnty Births Deaths 1979-2001
    • Census 2k Cnty Pct Age Hu 1940-2k
    • Census 2k Cnty Pop Trends 1940-2k
    • Census 2k Cnty Pop-Ch Nat-Ch Net-Mig 1990-2k
    • Census 2k Cnty Unit Type Pct 1980-2k
    • Census 2k Cnty Farms 1940-97
    • Census 2k Cnty Social Profiles
    • Census 2k Cnty Education 1940-2k
    • Census 2k Cnty Economic Profiles
    • Census 2k Cnty Residence 1995-2k
    • Census 2k Cnty Pop Age Groups 1930-2k
    • Census 2000 Tracts
  • Recreation
    • Canoe Routes
    • Canoe Dams
    • Water Access
    • Boat Ramps Parking Wildlife Management
    • Trout Streams
    • Trails
    • Scenic Byways
    • RAGBRAI Route 2006
  • Land Description
  • Infrastructure
  • Hydrologic
    • USGS Stream Low Flow Plate4
    • Major Water Source Lakes
    • USGS Gages
    • GAP NHD Streams
    • Waterbody
    • Streams 303d 2002
    • Beach Monitoring Sites
    • Designated Wetlands Setback
    • Designated Lakes 2004
    • Designated Rivers
    • Impaired Lakes 2004
    • STORET Sites
    • Lakes 305b 1998
    • Major Rivers
    • Federal Reservoirs
    • Streams 305b 1998
    • Designated Lakes 2002
    • Waterbody Point
    • Stream Order
    • Lakes 303d 1998
    • Stream Gages
    • Major Water Sources
    • Impaired Lakes 2006 DRAFT
    • Impaired Streams 2006 DRAFT
    • Significant Public Lakes
    • Designated Rivers 2004
    • Iowater Sites
    • Lakes 305b 1996
    • Major Lakes
    • Designated Rivers 2002
    • Cold Water Streams
    • Streams 305b 1994
    • Streams 303d 1998
    • Lakes 303d 2002
    • Streams 305b 1996
    • Impaired Streams 2004
    • Protected Streams
    • USGS Stream Low Flow Plate3
    • Designated Lakes
    • Protected Water Areas
    • Mississippian Sodium
    • Mississippian Fluoride
    • Mississippian Topography
    • Mississippian H2O Quality Wells
    • Mississippian Potentiometric
    • Mississippian Sulfate
    • Mississippian Evaporite
    • Mississippian Isopach
    • Mississippian Hardness
    • Mississippian Water Quality
    • Mississippian Outcrop Subcrop
    • Pennsylvanian Edge
    • Mississippian Usage
    • Mississippian Dissolved Solids
    • Mississippian Geology
    • Dakota H2O Quality Wells
    • PWTS Wells
    • Plugged Wells 1989-91
    • All Wells Public
    • Municipal Water Quality 1982-96
    • Private Wells
    • Groundwater Vulnerability Regions
    • Private Well Test
    • Plugged Wells
    • Maquoketa Galena Subcrop
    • Devonian Isopach
    • Maple Mill-Sheffield Isopach
    • Silurian Isopach
    • Lime Creek Isopach
    • Silurian-Dev Dissolved Solids
    • Silurian-Dev Confining Shales
    • Silurian-Dev Water Quality
    • Silurian-Dev Usage
    • Silurian-Dev H2O Quality Wells
    • Silurian-Devonian Sodium
    • Silurian-Devonian Hardness
    • Silurian-Devonian Evaporite
    • Silurian-Devonian Potentiometric
    • Silurian-Devonian Fluoride
    • Silurian-Devonian Base Topo
    • Silurian-Devonian Temperature
    • Silurian-Devonian Sulfate
    • Silurian-Devonian Chloride
    • Prairie du Chien Topo
    • Jordan Dissolved Solids
    • Jordan H2O Quality Wells
    • Jordan Topography
    • Jordan Usage
    • Jordan Transmissivity
    • Jordan H2O Quality Range
    • Jordan Fluoride
    • Jordan Water Quality
    • Jordan Radium
    • Jordan Sodium
    • Jordan Chloride
    • Jordan Hardness
    • Jordan Isopach
    • Jordan Pre-Potentiometric
    • Jordan Potentiometric
    • Jordan Temperature
    • Jordan Recession
    • Water Use Permits
    • Municipal Water Intake
  • Geologic
    • Sinkhole
    • Sinkhole Buffers
    • Quaternary Isopach
    • Quaternary Isopach Contours
    • Alluvial Deposits
    • Geochemical Survey
    • Coal Mine Entrance
    • Coal Mines
    • Mines 2000
    • Mines 1996
    • Mines 1997
    • NE Bedrock Geology
    • NW Bedrock Geology
    • Geologic Map 1997
    • Bedrock Geology
    • Bedrock Topography Lines
    • Bedrock Topography
    • NC Bedrock Geology
    • Bedrock Faults
    • Parabolic Dunes
    • Landforms
    • Lineated Ridges
    • Lineated Inlier
    • Landforms Old
    • Landform Regions
    • Paha Ridges
    • Des Moines Lobe
    • Geologic Sampling Points
  • Geographic
  • Environmental Regulation
    • Wastewater Treatment Plants
    • UST Sites
    • Unsewered Communities
    • Solid Waste Permit Facilities
    • Non-National Priority List
    • National Priority List
    • Manure Management Plans
    • Lust Sites
    • Environmental Facilities
    • Air Title V Permit Facilities
  • Elevation
    • Surface Topography
    • Surface Topography-Lines
    • Public Lakes Contours
  • Climatic
    • Annual Precipitation
  • Biologic Ecologic
    • Deer-Elk Farms
    • Hex Taxa Rich
    • Trout Streams
    • Fish Kills
    • Breeding Bird Survey Routes
    • Breeding Bird Atlas
    • Public Prairie
    • State Forest Stands
    • Mississippi River Forests
    • Forest Stand Boundaries Historic
    • Threatened Endangered Species
    • GLO_vegetation
    • Ecoregions_transitions
    • Ecoregions
  • Basins
  • Agriculture
    • Atrazine Restrictions
    • Vineyards
    • Apple Orchards
    • Open Feedlots
    • Manure Management Plans
    • Confinement Feeding Operations
    • Animal Feeding Operations
    • Drain Well Intake
    • Drain Well Buffer
    • Disposal Facilities
    • Drain Well