R Place - unknown
380 Citgo - Silurian
59 Short Stop - Buried Sand and Gravel
61 Drive-In Theatre - unknown

Abbe Center For Community Care - Silurian
Absolute Energy - Devonian
Ace Mobile Home Park - Ordovician
Ackley Creek Park - Devonian
Acorn Park Golf & Country Club - Devonian
Ada Hayden Heritage Park - Alluvial
Adair - Dakota
Adair-Casey Community School - Dakota
Adel - Alluvial
Aeroplane Inn - unknown
Ag Processing Inc. - Alluvial
Ag Processing Inc. - Devonian
Agape Christian Family Church - unknown
Ainsworth - Cambrian-Ordovician
Ainsworth 4 Corners Restaurant - Ordovician
Airline Inn - Ordovician (abv St. Peter)
Airport Lake Park - Silurian-Devonian
Airport National Public Golf Complex - Silurian
Akron - Alluvial
Albert City - Buried Sand and Gravel
Albion - Alluvial
Albrecht Acres - Ordovician (abv St. Peter)
Alburnett - Silurian-Devonian
Alcoa - Kelly Cottage - Silurian
Alcock Park - Alluvial
Alden - Mississippian
Alexander - Mississippian
Algona - Dakota
Algona Country Club - unknown
All Golf Center - unknown
Allison - Devonian
Almont Tap - unknown
Alta - Dakota
Alta Vista - Devonian
Altoona - Cambrian-Ordovician
Ambrose A Call State Park - Devonian
American Legion - Silurian-Devonian
American Martyrs Retreat House - Silurian-Devonian
Ameritec Machining Inc - unknown
Ames - Alluvial
Ames - Buried Sand and Gravel
Anamosa - Cambrian-Ordovician
Anamosa State Penitentiary - Cambrian-Ordovician
Anchor Inn (Garber) - Alluvial
Andover - Cambrian-Ordovician
Andrew - Cambrian-Ordovician
Angle Inn - unknown
Angler's Bay Resort - Dakota
Anita - Dakota
Ankeny - Cambrian-Ordovician
Annies - unknown
Anthon - Buried Sand and Gravel
Anthony's Resort - Cambrian-Ordovician
Aplington - Devonian
Apostolic Church - Silurian
Archer Daniels Midland Company #1 - Cambrian-Ordovician
Area Education Agency 13 - Buried Sand and Gravel
Argo General Store & Deli - Silurian
Argyle - Buried Sand and Gravel
Arlington - Cambrian-Ordovician
Armstrong - Buried Sand and Gravel
Asbury - Cambrian-Ordovician
Asbury - Ordovician
Ashley Inn Motel and Trailer Court - Devonian
Associated Milk Producer - Silurian
Atalissa - Silurian
Atkins - Silurian-Devonian
Atlantic - Dakota
Atlantic Head Start - Alluvial
Atrium Village Retirement Home - Buried Sand and Gravel
Auburn - Buried Sand and Gravel
Auburn - Dakota
Audubon - Alluvial
Aurelia - Dakota
Autumn Ridge Estates MHP - unknown
Ayshire - Buried Sand and Gravel

Backbone Golf & Country Club - Silurian-Devonian
Backbone State Park - Cambrian-Ordovician
Backbone State Park - Silurian
Bacon Addition - Ordovician
Bacon Addition - Silurian
Badger - Mississippian
Bagley - Buried Sand and Gravel
Bailey's Ford Park - Cambrian-Ordovician
Baldwin - Silurian
Balltown Sherrill Catholic School - Ordovician (abv St. Peter)
Bancroft - Devonian
Bankston - Ordovician
Bar-L-Ranch - Alluvial-Dakota
Barn Happy - Devonian
Barnum - Mississippian-Devonian
Barrington Lakes Water Commission - Ordovician (abv St. Peter)
Battle Creek - Alluvial
Battle Creek - Buried Sand and Gravel
Baxter - Alluvial
Bayard - Pennsylvanian
Beach Girls - unknown
Beachland inn - Silurian
Beaver Meadows Country Club - Devonian
Becker Water and Road - Mississippian
Beeds Lake Home Owners Association - Devonian
Beeds Lake State Park South - Devonian
Bell Harbor HOA - Devonian
Belle Plaine - Alluvial
Bellevue - Cambrian-Ordovician
Bellevue Golf Club - Ordovician (abv St. Peter)
Bellevue State Park North (Nelson Unit) - Cambrian-Ordovician
Bellevue State Park South - Dyas Unit - Ordovician (abv St. Peter)
Belmond - Mississippian
Bennett - Silurian
Bernard - Cambrian-Ordovician
Bertram Water Supply - Silurian
Big Canoe Lutheran Church - Cambrian-Ordovician
Big Creek Bluffs - Silurian
Big River United Energy Llc - Silurian
Big Rock Country Club - Silurian-Devonian
Big Springs Park - Cambrian-Ordovician
Black Diamond Roadhouse - unknown
Blairs Ferry Manor - Silurian
Blairsburg - Devonian
Blairsburg - Mississippian
Blairstown - Silurian-Devonian
Blencoe - Alluvial
Blue Grass - Silurian-Devonian
Bluff Lake Catfish Farm - Silurian
Bluffton Store - Cambrian-Ordovician
Bode - Mississippian-Devonian
Bolan Trinity United Methodist Church - Devonian
Boondocks Truck Haven Cafe - Mississippian
Boone - Alluvial
BOOS Implement Inc (LS) - Silurian-Devonian
BOOS Implement INC (NH) - Silurian-Devonian
Bowlaway Lanes - Silurian-Devonian
Braddyville - Alluvial
Bradford House - Devonian
Brandon - Silurian-Devonian
Brannaman's First Addition HOA - Alluvial
Brayton - Alluvial
Breckenridge Estates - Silurian-Devonian
Breda - Dakota
Breezy Pointe Subdivision - Cambrian-Ordovician
Breitbach Country Dining - Ordovician (abv St. Peter)
Bremer - Cambrian-Ordovician
Brewski's Bar and Grill - Silurian
Briarwood Estates - Ordovician (abv St. Peter)
Briggs Woods Golf Course - Mississippian
Briggs Woods Park - Mississippian
Brighton - Cambrian-Ordovician
Bristow - Devonian
Britt - Devonian
Brittany Estates - Silurian
Broadview Trailer Court - Ordovician
Brogan'S Pub & Grub - Alluvial
Bronson - Buried Sand and Gravel
Brook Hill Subdivision - Silurian
Brooke Amoco Plaza Mobile Home Park - Silurian
Browns Sales And Leasing - Alluvial
Brunsville - Alluvial
Bryn Mawr Restaurant & Motel - Mississippian
BS General Store - Alluvial
Bubba's Bar and Grill - Silurian-Devonian
Budde's - Ordovician
Buffalo - Silurian
Buffalo Center - Ordovician (abv St. Peter)
Buffalo Creek - Silurian-Devonian
Buffalo Shores - Scott County Conservation - Silurian
Bulgers Hollow Recreation Area - Ordovician (abv St. Peter)
Burds Green Acres Subdivision - Ordovician (abv St. Peter)
Burlington - Buried Sand and Gravel
Burr Oak Motel - Devonian
Burt - Devonian-Ordovician
Burt's Tavern - unknown

Cafe Iguanas - unknown
Calamus - Cambrian-Ordovician
Calkins Nature Center - Mississippian
Callender - Cambrian-Ordovician
Calmar - Cambrian-Ordovician
Camanche - Alluvial
Cambridge - Alluvial
Camp Abe Lincoln - Silurian
Camp at the Woods - Devonian
Camp C S Klaus Boy Scout Camp - Ordovician
Camp Conestoga - Mississippian
Camp Conestoga - Silurian
Camp Courageous of Iowa - Silurian
Camp Dodge - Buried Sand and Gravel
Camp Ewalu-Stone Center Well 7 - Ordovician
Camp Ewalu (Outpost) - Silurian
Camp Ewalu (Pool) - Silurian
Camp Ewalu Cedar Lodge - Silurian
Camp Hitaga - Silurian
Camp Ingawanis (Maple Well) - Cambrian-Ordovician
Camp Ingawanis (Ranger Well) - Silurian-Devonian
Camp Iodiseca - Silurian-Devonian
Camp Joy Hollow - Dakota
Camp Little Cloud - Ordovician (abv St. Peter)
Camp Mitigwa - Mississippian
Camp Shalom - Silurian
Camp Tanager - Silurian
Camp Tanglefoot - Devonian
Camp Wyoming - Silurian
Canyon Creek Golf Course - unknown
Cardinal Valley Estates 3rd Addition - Ordovician
Carlisle - Alluvial
Carlson College of Massage Therapy - unknown
Carlton Mobile Home Court - Silurian
Carpenter Bar & Grill - unknown
Carriage Meadows Homeowners Association - Silurian
Carriage Place Estates HOA - Silurian
Carroll - Dakota
Carson - Alluvial
Carson - Dakota
Cascade - Cambrian-Ordovician
Cascade - Silurian
Case Corporation - Ordovician
Casey - Alluvial
Casey'S Marketing - Alluvial
Casino Omaha - Alluvial
Castalia - Cambrian-Ordovician
Castana - Alluvial
Cat'S Wharf - Ordovician (abv St. Peter)
Cattlemen's Steak & Provisions - Mississippian
CED REL Supper Club & Motel - Silurian
Cedar Falls - Silurian-Devonian
Cedar Falls Mobile Home Village - Devonian
Cedar Hills Apartments - Cambrian-Ordovician
Cedar Rapids - Alluvial
Cedar Ridge Vineyards - unknown
Cedar River Harley Davidson - unknown
Cedar River Trailer Park - Alluvial
Cedar Rock Visitor Center #2 - Silurian
Cedar Springs Wesleyan Camp - Devonian
Cedar Valley Arboretum & Botanical Grdns - Silurian-Devonian
Cedar Valley Golf - Silurian
Cedar Valley Produce Auction - Devonian
Cedarcrest Golf & Country Club - Buried Sand and Gravel
Celotex Corporation - Mississippian
Center For Alcohol & Drug Services #2 - Silurian
Center Junction - Silurian
Center Point - Cambrian-Ordovician
Center Point - Silurian-Devonian
Central Baptist Church - Buried Sand and Gravel
Central City - Silurian
Central Iowa Power Cooperative - Silurian
Central Iowa Rural Water Association - Devonian
Central Park - Jones Conservation - Silurian
Central Water Works - Mississippian
Chain Ridge Subdivision - Silurian
Charles City - Devonian
Charles City Golf Course - Devonian
Charlotte - Cambrian-Ordovician
Charter Oak - Alluvial
Cherokee - Plant 1 - Dakota
Cherokee - Plant 2 - Dakota
Cherokee RWD - Mill Creek Subsystem - Buried Sand and Gravel
Cherokee RWS - Cherokee Subsystem - Dakota
Cherry Hills Subdivision - Silurian
Chester - Buried Sand and Gravel
Chestnut Ridge - Devonian
Chimney Rock Canoe Rental - Ordovician
Christensen Farms Midwest Llc - Devonian
Christian Conference Center - unknown
Church Of Jesus Christ Of Lds (Atlantic) - Buried Sand and Gravel
Churdan - Buried Sand and Gravel
Clair-View Acres Public Water System - Silurian-Devonian
Clare - Dakota
Clarence - Silurian
Clarinda Treatment Complex - Buried Sand and Gravel
Clarion - Mississippian
Clark's Ferry - Devonian
Clarksville - Devonian
Clarksville Recreation Development, Inc. - Devonian
Clarmond Country Club - Buried Sand and Gravel
Clayton - Cambrian-Ordovician
Clayton County Law Enforcement Center - Ordovician
Clear Lake - Devonian
Clearview Mobile Home Park - Silurian-Devonian
Cleghorn - Buried Sand and Gravel
Clermont - Cambrian-Ordovician
Cliff's Place Inc. - Devonian
Climax Molybdenum Company - Alluvial
Clover Ridge Subdivision - Silurian
Coach Road Well Association - Silurian
Cocklin Fish Farm - unknown
Cody Elementary School - Silurian
Coggon - Silurian
Colesburg - Cambrian-Ordovician
Colfax - Alluvial
Colony Country Campground - Devonian
Columbus Junction - Buried Sand and Gravel
Colwell - Devonian
Comfort Inn - Hariom, Inc. - Buried Sand and Gravel
Comfort Inn - Hariom, Inc. - Silurian
Community Church of Kamrar - Mississippian
Community Country Store - Buried Sand and Gravel
Community Orchard - Mississippian
Cono Christian School - Devonian
Conrad - Mississippian
Consumers Cooperative Society - Silurian-Devonian
Coon Rapids - Buried Sand and Gravel
Coonhunters - Silurian
Coralville - Buried Sand and Gravel
Coralville - Cambrian-Ordovician
Coralville - Silurian
Coralville Lake-Administration Building - Silurian-Devonian
Coralville Lake-Sandy Beash - Silurian
Coralville Lake-Sugar Bottom - Silurian
Coralville Lake-West Overlook - Silurian
Coralville Lake Manor - Silurian
Coralville Lake Marina - Devonian
Coralville Lake Terrace - Silurian
Corner Market - unknown
Corporation of New Melleray - Cambrian-Ordovician
Correctionville - Alluvial
Correctionville - Dakota
Corridor Ridge Subdivision - Silurian
Corwith - Mississippian
Cottage Reserve Corporation - Silurian-Devonian
Coulter - Devonian
Council Bluffs - Alluvial
Country Drive - Dakota
Country Estates Mobile Home Park - Alluvial
Country Hills Water Corporation - Ordovician
Country Store To Fairview - Silurian
Country View Homes - Buried Sand and Gravel
Crawford Creek Park - Dakota
Creighton University Retreat Center - Dakota
Crescent Hills Ski Lodge - Buried Sand and Gravel
Cresco - Cambrian-Ordovician
Cresco Golf & Country Club - Devonian
Crestview - Mississippian
Crestwood Acres - Silurian
Crooked Creek Christian Camp - Mississippian
Crystal Lake - Devonian
Culvers Lawn And Garden - unknown
Cumberland - Dakota
Cumberland Ridge First Addition - Devonian
Cushing - Buried Sand and Gravel
Cutty's Okoboji Resort Club - Buried Sand and Gravel

D&M Addition - Silurian
Dairy Mart - Mississippian
Dakota City - Mississippian-Devonian-Ordovician
Dallas-Melcher - Cambrian-Ordovician
Dallas Center - Alluvial
Danbury - Alluvial
Dans Overhead Doors - unknown
Dawson - Alluvial
Daybreak Foods - Dakota
Dayton - Mississippian-Devonian
De Soto - Alluvial
De Witt - Cambrian-Ordovician
Decorah - Alluvial-Ordovician
Decorah - Cambrian-Ordovician
Decorah Fish Hatchery - Cambrian-Ordovician
Decorah Implement Company - Ordovician
Decorah Sales Commission - unknown
Dedham - Alluvial
Deer Creek Lutheran Church - Devonian
Deer Creek Subdivision (Fort Dodge) - Mississippian
Deer Ridge Homeowners Water Association. - Silurian
Deer Valley HOA - Silurian
Deer Valley Lodge - bedrock
Deerfield Heights Association - Cambrian-Ordovician
Deerwood Estates Utilities - bedrock
Deerwood Golf Club - Mississippian
Deese Thirsty Camel - Alluvial
Defiance - Alluvial
Delaware - Silurian
Delhi - Silurian
Delhi Lakeview Estates - Silurian
Delmar - Cambrian-Ordovician
Deloit - Alluvial
Denison - Alluvial
Denver - Cambrian-Ordovician
Denver - Silurian-Devonian
Des Moines Water Works - Alluvial
Des Moines Water Works - Cambrian-Ordovician
Desoto Bend Mini Mart - Alluvial
Desoto National Wildlife Refuge - Alluvial
Devenport Country Club - Silurian
Devil's Creek Estates Home Association - Silurian-Devonian
Dexter - Alluvial
Dietrick Mobile Home Park - Devonian
Digman Water Supply - Silurian
Dike - Devonian
Divide Hill Bar and Grill - unknown
Dixon - Silurian
Dixon Memorial Park - Silurian
Dodds Valley View - Silurian-Devonian
Dolliver - Buried Sand and Gravel
Donahue - Silurian
Donnellson - Cambrian-Ordovician
Doon - Alluvial
Dorchester Supper Club - Cambrian-Ordovician
Dorell Drive Home Owners Association - Mississippian
Dorothye Pecaut Nature Center - Dakota
DOT-4 (I680 RA 023S Loveland - Buried Sand and Gravel
DOT-4 (I680 RA 024N Loveland - Buried Sand and Gravel
Dot-6 (I-80 Ra 004N Wilton) - Silurian-Devonian
DOT-6 (I-80 Rest Areas 003 Wilton) - Silurian
DOT Loveland Scenic Overlook - Buried Sand and Gravel
Double Bar Seven - Buried Sand and Gravel
Dow City - Dakota
Dows - Devonian
Dows Golf Course, Inc. - Mississippian
Dry Dock Sports Bar & Grill - Silurian-Devonian
Duane Arnold Energy Center - Silurian
Dubuque - Alluvial
Dubuque - Cambrian-Ordovician
Dubuque Family Golf & Recreation Center - Cambrian-Ordovician
Dubuque Family Golf & Recreation Center - Ordovician
Dubuque Regional Airport - Cambrian-Ordovician
Dubuque Regional Airport - Ordovician
Dubuque Shooting Society - Cambrian-Ordovician
Dubuque Sports Complex - Ordovician
Dubuque YMCA Camp - Ordovician (abv St. Peter)
Ducks Bar & Grill - Buried Sand and Gravel
Dudley's Corner - Mississippian
Dumont - Devonian
Duncan Heights, Inc. - Buried Sand and Gravel
Duncombe - Mississippian
Dunkerton - Silurian-Devonian
Dunlap - Alluvial-Dakota
Durant - Buried Sand and Gravel
Dutch Valley Store - unknown
Dyersville - Cambrian-Ordovician
Dyersville Golf & Country Club - Ordovician (abv St. Peter)

Eagle Grove - Buried Sand and Gravel
Eagle Grove - Mississippian
Eagle Grove Country Club - Mississippian
Eagle Lane Corporation - Silurian
Eagles Nest - Mississippian
Earling - Alluvial
Earlville - Cambrian-Ordovician
Early - Alluvial
East Side Acres - Buried Sand and Gravel
Eastern Iowa Pork Manufacturing, Inc. - Silurian-Devonian
Econo Lodge - Silurian-Devonian
Eddyville - Alluvial
Edgewood - Cambrian-Ordovician
Edgewood - Silurian
Effigy Mounds National Monument - Cambrian-Ordovician
Eldon C Stutsman Inc - Buried Sand and Gravel
Eldora - Mississippian
Eldred Sherwood Park - unknown
Eldridge - Silurian-Devonian
Elgin - Ordovician (abv St. Peter)
Elk Horn - Alluvial
Elk Horn - Dakota
Elk Lodge #297 - Ordovician (abv St. Peter)
Elkader - Cambrian-Ordovician
Elkader Golf and Country Club - Cambrian-Ordovician
Elkader Grace Evangelical Free Church - Ordovician
Elkhart - Buried Sand and Gravel
Elliott - Alluvial-Dakota
Ellsworth - Mississippian
Elma Water Supply - Devonian
Ely - Silurian
Emerson - Buried Sand and Gravel
Emmet County Iowa Lake - Dakota
Emmet County Tuttle Lake - Buried Sand and Gravel
Emmet County Wolden Rec. Area - Buried Sand and Gravel
Emmetsburg - Alluvial
Emmetsburg - Dakota
Epworth - Silurian
Equistar Chemicals - Cambrian-Ordovician
Equistar Chemicals - Cambrian (blw St. Lawrence)
Essex - Alluvial
Estherville - Cambrian-Ordovician
Evangelical Covenant Church - Buried Sand and Gravel
Evansdale - Devonian
Evansdale - Silurian-Devonian
Everly - Alluvial
Exira - Alluvial

F B & Company - unknown
F W Kent Park - Silurian-Devonian
Fairbank - Cambrian-Ordovician
Fairbank - Silurian-Devonian
Fairfax - Silurian
Fairfax Handimart - Devonian
Fairfield - Cambrian-Ordovician
Fairview Mennonite Church - Buried Sand and Gravel
Fairview Trailer Court - Silurian
Fairway Oaks - Silurian
Fairyland Park Ballroom Inc - unknown
Faith Lutheran Church (Palmer) - unknown
Far Horizons Subdivision - Silurian
Farley - Cambrian-Ordovician
Farmegg Products - Mississippian
Farmersburg Waterworks - Ordovician
Farmstead Preschool - Devonian
Farragut - Alluvial
Fast Trak - Ordovician
Fawn Creek Country Club - Silurian
Fayette - Cambrian-Ordovician
Featherlite Manufacturing, Inc. - Silurian
Fenton - Dakota
Ferguson - Mississippian
Fertile - Devonian
Fillmore Bar & Grill - Silurian
Fillmore Recreation Area - Silurian
Findey's Landing - Ordovician
First Presbyterian Church (Near Ely) - Silurian
Five Star Cooperative - unknown
Floyd - Devonian
Floyd Convenience Store - Devonian
Fonda - Dakota-Mississippian
Fontanelle - Alluvial
Food Waste Solutions - Silurian
Foremost Farms USA - Cambrian-Ordovician
Forest City - Devonian
Forest Manor Subdivision - Silurian
Forest Oak Properties - unknown
Forestgate Subdivision - Silurian
Fort Atkinson - Cambrian-Ordovician
Fort Dodge - Cambrian-Ordovician
Fort Dodge - Mississippian
Fort Dodge Asphalt Company - Mississippian
Fort Madison - Alluvial
Fossil and Prairie Area - Devonian
Four Oaks - Silurian
Fox Creek Benefitted Water District - Alluvial
Fox Valley Acres - Devonian
Fredericksburg - Cambrian-Ordovician
Frederika's Stein & Dine - Devonian
Freeport - Cambrian-Ordovician
Fremont - Buried Sand and Gravel
Fremont Golf Course - Buried Sand and Gravel
Fruitland - unknown
Funcrest - Silurian

Gabeline Truck Stop - unknown
Gaddis Estates - Silurian
Gallery Acres West - Silurian
Gardner Golf Course - unknown
Garnavillo - Cambrian-Ordovician
Garner - Devonian
Garrison - Cambrian-Ordovician
Gassman's MHP & Spruce Harbor Inn - Ordovician (abv St. Peter)
Gateway Development - Silurian
General Mills - Cambrian-Ordovician
General Store - Silurian
Geneva - Devonian
George - Alluvial
Georgia Pacific Corp. - Cambrian-Ordovician
Gerard of Iowa - Devonian
Gilbert - Buried Sand and Gravel
Gilbertson Park - Alluvial
Gilbertville - Silurian-Devonian
Gillett Grove - Alluvial
Gilmore City - Mississippian
Gladbrook - Alluvial
Glen Oaks Addition - Silurian
Glenwood - Alluvial
Glenwood Community Church - Pennsylvanian
Glidden Water Supply - Dakota
Global Foods Processing - Alluvial
Gold Key Motel - Mississippian
Golden Oval Eggs - Cambrian-Ordovician
Goldfield - Mississippian
Golf Side Grille - Silurian
Goodell - Mississippian
Goose Lake - Cambrian-Ordovician
Gorder's Service and Cafe - Buried Sand and Gravel
Gould Heights Water Service Company - Buried Sand and Gravel
Gouldsburg Park - Ordovician (abv St. Peter)
Gowrie - Cambrian-Ordovician
Grace Community Church - Silurian
Grace Fellowship Curch - Silurian-Devonian
Grace Lutheran Camp Inc - unknown
Graettinger - Alluvial
Grafton - Devonian
Granada Mobile Home Park - Ordovician
Grand Junction - Pennsylvanian
Grand Mound - Silurian
Grand View Resort - unknown
Grandview - Buried Sand and Gravel
Grandview Circle Water Association - Devonian
Grandview Drive In - Buried Sand and Gravel
Granger - Buried Sand and Gravel
Grant Park - Sac Co. Conservation Board - Dakota
Green Acres Mobile Home Park - Alluvial
Green Valley Ag And Turf - Silurian
Green Valley Golf Course - unknown
Greenbriar Subdivision - Cambrian-Ordovician
Greenbriar Subdivision - Ordovician (abv St. Peter)
Greene - Devonian
Greene Lakes - Devonian
Greenfield - Alluvial
Greenfield - Dakota
Greenwood Acres - Buried Sand and Gravel
Grimes - Alluvial
Grinnell - Cambrian-Ordovician
Griswold - Dakota
GSTC - Silurian-Devonian
Guthrie Center - Alluvial
Guthrie Grove Church Camp - Dakota
Guttenberg - Cambrian-Ordovician
Guttenberg Golf & Country Club - Ordovician

Hagge Park-Sac Co. Conservation Board - Buried Sand and Gravel
Hale Tap - unknown
Halvorson Park - Devonian
Hamburg - Alluvial
Hampton - Buried Sand and Gravel
Hampton - Cambrian-Ordovician
Hampton Country Club - Buried Sand and Gravel
Hancock County Fairgrounds - Devonian
Hanford Community Church - Devonian
Hank's Tavern - Ordovician (abv St. Peter)
Hanlontown - Devonian
Hansell - Devonian
Happy Time Resort Llc - Devonian
Harbor House - Alluvial
Harcourt - Devonian
Hardy - Dakota-Mississippian
Harlan - Alluvial
Harmony Bible Church - Cambrian-Ordovician
Harpers Mini Mart - Alluvial
Hart Ridge Golf Course - Silurian-Devonian
Hartley - Dakota
Hartman Riverside Camp #1 - Alluvial
Hartwick - Buried Sand and Gravel
Hartwick Point - Silurian-Devonian
Harvest Farm Campground LLC - Ordovician
Harvey - Buried Sand and Gravel
Hastings - Alluvial
Havelock - Dakota
Hawarden - Alluvial
Hawkeye - Buried Sand and Gravel
Hawkeye - Devonian
Hawkeye Pride Egg Farm - Mississippian
Hawkeye Renewable - Fairbank - Silurian-Devonian
Hawkeye Renewables Shell Rock - Devonian
Hazleton - Cambrian-Ordovician
Henderson - Alluvial
Heritage Residence - Silurian-Devonian
Heritage United Methodist Church - Devonian
Hi Point Golf Course - Silurian
Hiawatha - Silurian-Devonian
Hickory Acres - Cambrian-Ordovician
Hickory Grove Golf Course - Ordovician (abv St. Peter)
Hickory Hills Annex Homeowners Association - Silurian
Hickory Hills Subdivision #1 - Silurian
Hickory Hills Subdivision #2 - Silurian
Hickory Hollow Water Service - unknown
Hidden Acres Country Club - Dakota
Hidden Acres Subdivision - Silurian
Hidden Hills Golf Course - Silurian
Hidden River Campgrounds - Silurian
Hide-A-Way Manor - Silurian
Hideaway Hills Mobile Home Park - Cambrian
High and West Amana - Alluvial
Highland General Store - Cambrian-Ordovician
Highland High School - Buried Sand and Gravel
Hill Top Subdivision #1 - Buried Sand and Gravel
Hill Top Subdivision #1 - Devonian
Hills Ball Park - Alluvial
Hills Bank - Buried Sand and Gravel
Hills Community Building - unknown
Hills School - IC Comm Schools - Alluvial
Hillside Golf - Devonian
Hillside Stables Resturant - Ordovician
Hilltop Road Association #3 - Devonian
Hilltop South Homeowners Association - Buried Sand and Gravel
Hilltop Village MHP Inc. - Dakota
HIM Hearth N' Home Cooking - unknown
Hinton - Dakota
Hitchcock Nature Center - Buried Sand and Gravel
Hitter's Sports Park - Silurian
Hole N The Wall Lodge - Dakota
Holmes - Mississippian
Holstein - Alluvial
Holstein - Dakota
Holy Cross - Ordovician (abv St. Peter)
Homeland Energy Solution Llc - Silurian-Devonian
Homestead - Silurian-Devonian
Hoot Owl Hollow Campground - Ordovician
Hooters Haven - Ordovician (abv St. Peter)
Hopkinton - Cambrian-Ordovician
Hornick - Buried Sand and Gravel
Howard H Cherry Scout Reservation - Silurian
Howard Residential Care Facility - Ordovician (abv St. Peter)
Hubbard - Mississippian
Humboldt - Mississippian
Humboldt Country Club - Mississippian
Hunts Cedar River Campground - Silurian
Hurstville Interpretive Center - Cambrian-Ordovician
Huxley - Alluvial
HWH Corporation - Silurian

IBP-Denison Plant - Alluvial
IBP-Perry Plant - Cambrian-Ordovician
Ida Grove - Alluvial
Immanuel Reformed Church - unknown
Independence - Silurian-Ordovician
Indian Hills Golf & Country Club - Buried Sand and Gravel
Indian Hills Home Owners Association - Silurian
Indianola - Cambrian-Ordovician
Ingham Lake Lutheran Camp - Dakota
Ingham Lakes Estates - unknown
Interstate Park - Devonian
Interstate Power Company - Cambrian
Ioco Truck Stop - Ordovician
Ionia - Devonian
Iowa-American Water Co. - Clinton - Cambrian-Ordovician
Iowa City - Alluvial
Iowa City - Cambrian-Ordovician
Iowa City Regency Mobile Home Park - Alluvial
Iowa City Regency Mobile Home Park - Silurian-Devonian
Iowa Contract Fabricators, Inc. - Devonian
Iowa County Park - Buried Sand and Gravel
Iowa DOT (Dows) - Mississippian
Iowa Ethanol Llc - Devonian
Iowa Falls - Mississippian
Iowa Falls Evangelical Free Church - Mississippian
Iowa Lakes Regional Water - Alluvial
Iowa Limestone Co. - Mississippian
Iowa Mennonite School - Buried Sand and Gravel
Iowa State Penitentiary - Buried Sand and Gravel
Iowa Valley Estates - Alluvial
Ira - Buried Sand and Gravel
Ireton - Dakota
Island Park Boat House - Silurian-Devonian
Iva Inc. - Silurian-Devonian

J Wood Park - Ordovician
Jackson Heights Golf Course - Devonian
Jaeger Plumbing & Pump, Inc. - Cambrian-Ordovician
Jamaica - Buried Sand and Gravel
Janesville - Cambrian-Ordovician
Janesville - Silurian
Jefferson - Buried Sand and Gravel
Jerico Jos - Silurian-Devonian
Jesup - Silurian-Devonian
Jewel's Food and Spirits - Silurian-Devonian
Jewell - Mississippian
Jewell Skate Country - Cambrian-Ordovician
Jimi B'S - unknown
John Deere Dubuque Works - Cambrian
John Deere Dubuque Works - Cambrian-Ordovician
John XXIII Catholic Church - Silurian
Johnson County Ag Association - Silurian-Devonian
Joice - Devonian
Jolley - Mississippian-Devonian
Jos longbranch - Devonian

K&K Gas and Food - Ordovician (abv St. Peter)
Kalmes Store - Ordovician (abv St. Peter)
Kalona - Alluvial
Kammerer Trailer Court - Alluvial
Kanawha - Mississippian
Kathys Korner - Silurian
Kauths Addition - Silurian
Kay Enterprises Inc - unknown
Kelley - Buried Sand and Gravel
Kellogg - Alluvial
Kellogg - Buried Sand and Gravel
Kendallville Park - Ordovician
Kennedy Memorial Park - Mississippian
Kensett - Devonian
Keota - Cambrian-Ordovician
Kerry Company - Ordovician
Kessler's Homeowners Association - Silurian-Devonian
Kevington Lane - unknown
Keystone - Cambrian-Ordovician
Kimballton - Alluvial
Kinderfarm Preschool - Silurian
Kingdom Hall - Ordovician
Kingdom Hall (Waukon) - unknown
Kingsley - Alluvial
Kingsley - Buried Sand and Gravel
Kinze Manufacturing - Buried Sand and Gravel
Kirkwood Softball Complex - Silurian
Klemme - Devonian
Klemme - Devonian-Cambrian-Ordovician
Klemme Recreation Club - Devonian
Knapp Mobile Home Court, No. 4 - Ordovician
Knieram - Buried Sand and Gravel
Knights Farm - unknown
Knotty Pine Tavern - Cambrian-Ordovician
Knoxville - Cambrian-Ordovician
Koch Nitrogen Co - Ft Dodge - unknown
Kochies - Silurian-Devonian
KOL GOL - Cambrian
Kuennen's Quarry County Park - Devonian
Kum & Go Store #267 - Devonian

La Motte - Cambrian-Ordovician
La Porte City - Cambrian-Ordovician
La Porte City - Silurian
La Porte City Golf Course - Silurian-Devonian
Lacina Meadows Residential Subdivision - Silurian-Devonian
Ladora - Buried Sand and Gravel
Lake City - Dakota
Lake Cornelia Park -Wright Co Conservat - Mississippian
Lake Crest Manor Homeowners Association - Silurian
Lake Hendricks Park (West Well) - Silurian-Devonian
Lake Hendricks Park East Well - Devonian
Lake Huntington Estates - Silurian
Lake Macbride Golf Course - Devonian
Lake Macbride MacBride Heights HOA - Silurian
Lake Macbride State Park-Beach - Silurian
Lake Macbride State Park-East - Silurian-Devonian
Lake Macbride State Park - North - Silurian-Devonian
Lake Meyer Park - Ordovician (abv St. Peter)
Lake Mills - Devonian-Ordovician
Lake Odessa Cabin Owners Association - Buried Sand and Gravel
Lake Panorama Water Company - Cambrian-Ordovician
Lake Panorama Water Company - Dakota
Lake Ridge, Incorporated - Alluvial
Lake Shore Resorts Club, Inc. - Silurian
Lake View - Buried Sand and Gravel
Lake Vista Subdivision - Silurian
Lakeshore Water Association - Devonian
Lakeside Golf - Buried Sand and Gravel
Lakeside Golf Course - Mississippian
Lakeside Manor Park - Silurian
Lakeview Golf Course, Inc. - Silurian
Lakeview Knolls Homeowners Assn. - Silurian
Lakewood Utilities - Mississippian
Lakewoods Development - Silurian
Lakota - Devonian-Ordovician
Lamont - Cambrian-Ordovician
Lamont - Silurian
Lanesboro - Dakota
Lansing - Cambrian
Latimer - Mississippian
Laura Ingalls Wilder Museum - Cambrian-Ordovician
Laurens - Devonian
Lawler - Ordovician
Lawton - Dakota
Lazy Acres RV Park - Silurian
Lazy Susan Campground - Cambrian-Ordovician
Le Mars - Dakota
Leaf Lake Estates HOA - Silurian
Ledyard - Devonian
Lehigh - Cambrian-Ordovician
Lehigh Portland Cement - Cambrian-Ordovician
Leland - Ordovician
Lenmar Subdivision & Woodland Estates MHP - Silurian-Devonian
Letts United Methodist Church - unknown
Lewis - Dakota
Lewis and Clark Monument - Buried Sand and Gravel
Lewis And Clark State Park - Alluvial
Lidtke Park - unknown
Lime Creek Concervation Area - Devonian
Lime Springs - Ordovician (abv St. Peter)
Lincolnway Investment Group - unknown
Linn County Chapter Izaak Walton League - unknown
Linn Grove - Alluvial
Linn Grove Park - Devonian
Linn Hollow Mobile Home Park - Mississippian
Lisbon - Silurian
Little Angels Child Care Center - unknown
Little Brown Church - Devonian
Little Sioux - Alluvial
Little Sioux Scout Ranch - Dakota
Littlefield Recreation Area - Alluvial
Livermore - Mississippian
Living Hope Community Church - Buried Sand and Gravel
Living Word Christian Church - Silurian
Lock and Dam 14 - Silurian
Logan - Alluvial
Logan-Missouri Valley Country Club - Alluvial
Lohrville - Mississippian
Lone Rock - Devonian
Lone Tree - Buried Sand and Gravel
Long Beach Mobile Park - Devonian
Long Branch Tavern - Silurian
Long Grove - Silurian
Lore Mobile Home Park - Ordovician (abv St. Peter)
Lore Oaks Homeowners Association - Cambrian-Ordovician
Lost Canyon Mobile Home Park - Ordovician
Lost Nation - Silurian
Louis Rich Co - Sigourney - Mississippian
Louisa - Muscatine Community School - Alluvial
Louisa - Muscatine Community School - Buried Sand and Gravel
Louisa Co Law Enforcement Ctr - Buried Sand and Gravel
Louisa Courts Mobile Home Park & Sales - Alluvial
Louisa Courts Mobile Home Park & Sales - Devonian
Louisa Generating Station - Alluvial
Low Moor - Silurian
Lowden - Silurian
Lowell's Landing Company - Ordovician (abv St. Peter)
Lower Deer Creek Mennonite Church - Buried Sand and Gravel
Loyal Order of the Moose-Iowa Falls - Mississippian
Loyal Order of the Moose Lodge (Cedar Rapids) - Silurian
LT Tap - Devonian
Lu Verne - Mississippian
Luana - Ordovician
Lucky Resort Campground - Devonian
Lunds Camp Inc. - Alluvial
Luster Heights Camp - Cambrian-Ordovician
Luxemburg - Cambrian-Ordovician
Lyn-Den Heights Homeowners Assoc. - Silurian-Devonian
Lyon-Sioux RWS - Big Sioux - Alluvial
Lyon-Sioux RWS - Big Sioux - Dakota
Lyon-Sioux RWS - Boyden - Alluvial
Lyon-Soiux RWS Doon Subsystem - Alluvial
Lytton - Buried Sand and Gravel
Lytton - Devonian, Cambrian-Ordovician

M and W Mobile Home Park - Silurian
Macedonia - Alluvial
Madrid - Alluvial
Madrid - Buried Sand and Gravel
Maggies Diner - unknown
Magnolia - Buried Sand and Gravel
Mahaska Rural Water System, Inc. - Alluvial
Makada Homeowners Association - Buried Sand and Gravel
Makee Manor - Cambrian-Ordovician
Mallard - Dakota
Malvern - Alluvial
Manchester - Silurian
Manchester Fish Hatchery - Silurian
Manchester Livestock Auction & Country Cafe - Silurian
Manilla - Buried Sand and Gravel
Manly - Devonian
Manning - Alluvial
Manson - Cambrian
Maple Hills Country Club - Silurian
Maple River Westside Waterline - Dakota
Mapleton - Alluvial
Maquoketa - Cambrian-Ordovician
Maquoketa Caves State Park #3 - Silurian
Maraks Commercial Property - unknown
Marathon Light & Water Department - Buried Sand and Gravel
Marble Rock - Devonian
Marcus - Ordovician
Marengo - Alluvial
Marion - Cambrian-Ordovician
Marion - Silurian-Devonian
Mark Twain Meadows Homeowners - Silurian-Devonian
Marquette - Cambrian
Marr Park - Mississippian
Marshalltown - Buried Sand and Gravel
Marshalltown - Mississippian
Martelle - Silurian
Marthas Hilltop Bar & Grill - unknown
Martin Marietta Aggregates, Inc. - Mississippian
Mason City - Cambrian-Ordovician
Massena - Alluvial
Massey Marina - Ordovician
Matsell Bridge A - Silurian
Maurice - Alluvial
Maurice - Dakota
Max's - unknown
Maxwell - Buried Sand and Gravel
Maynard Water Supply - Cambrian-Ordovician
Maynes Grove - Franklin Co Conservation - unknown
Maysville - Silurian
McBride Field Campus - Silurian
McCarty Creek Homeowners Association - Silurian
McGregor - Cambrian-Ordovician
Meadow Hills Golf Course - Mississippian
Meadow Knolls Addition - Silurian-Devonian
Meadow Lane Mobile Home Park - Silurian
Meadows - Silurian-Devonian
Mecha Ceba Subdivision - Silurian
Mechanicsville - Silurian
Melsha Tap, Inc. - unknown
Merrill - Dakota
Meservey - Devonian
Mickeys Valley Hall - unknown
Mid-Mart, Inc. - Ordovician
Mid River Marina - unknown
MidAmerican Energy - Neal South - Alluvial
MidAmerican Energy - Neal South - Buried Sand and Gravel
Midamerican Energy Co. Neal North - Alluvial
Midway Water and Lighting Co. - Silurian
Midwest Grain Processors - Devonian
Mike's Saloon - Buried Sand and Gravel
Miles - Ordovician (abv St. Peter)
Milford - Dakota
Minden - Buried Sand and Gravel
Minden - Dakota
Mineola Steak House - unknown
Miners Creek Hideaway - Cambrian-Ordovician
Mines Of Spain - Eb Lyons Nature Center - Ordovician
Minneiska #1 North - Alluvial
Missfitz - Alluvial
Missouri Valley - Alluvial
Mitchell County Care Facility - Devonian
Mitchell County Nature Center - Devonian
Mitchell Town Pump - Devonian
Mitchellville - Alluvial
Modale - Alluvial
Modern Manor, Inc. - Silurian
Mondamin - Alluvial
Monmouth Water Supply - Silurian
Monona - Cambrian-Ordovician
Monsanto Company - Alluvial
Montauk Historical Site - Ordovician
Monti-View Mobile Home Park - Silurian
Monticello - Silurian-Ordovician
Montour - Alluvial
Montrose - Alluvial
Moonshine Tap - Silurian-Devonian
Moorhead - Buried Sand and Gravel
Moorland - Mississippian
Morgan Creek Park - Silurian-Devonian
Morley - Silurian
Morning Sun - Cambrian-Ordovician
Morning Sun - Ordovician
Morwood Campground - Cambrian-Ordovician
Motel 6 (I80 Exit 225) - Silurian-Devonian
Mount Auburn - Silurian-Ordovician
Mount Joy MHP - Silurian
Mount Pleasant - Cambrian-Ordovician
Mount Vernon - Cambrian-Ordovician
Mount Vernon - Silurian
Mount Vernon Community Bible Church - Silurian
Moville - Buried Sand and Gravel
Moville - Dakota
MSI Mold Builders - Silurian-Devonian
Mud Lake Park - Cambrian-Ordovician
Murphy Family Farms-Feed Mill - Dakota
Muscatine - Alluvial
Muscatine Com School Transportation Bldg - Silurian-Devonian
Muscatine Municipal Golf Course - Buried Sand and Gravel

Nashua - Cambrian-Ordovician
Nashua - Devonian
Nashua Town & Country Club - Silurian-Devonian
Natural Gas Pipeline Station #204 - Buried Sand and Gravel
Ne Iowa Christian Service Camp - unknown
Neola - Dakota
Nevada - Alluvial
New Albin - Cambrian
New Hampton - Cambrian-Ordovician
New Hampton Golf and COuntry Club - Devonian
New Hampton red power inc - Devonian
New Hartford - Devonian
New Liberty - Silurian
New London - Cambrian-Ordovician
New Providence - Mississippian
New Sharon - Alluvial
New Vienna - Cambrian-Ordovician
New Wine Park - Silurian
Newell - Buried Sand and Gravel
Newhall - Silurian-Devonian
Newton - Alluvial
Nishna Valley Community School - Buried Sand and Gravel
Nishna Valley Recreation Club - Dakota
Nitta Ho Valley - Ordovician (abv St. Peter)
Nora Springs - Devonian
Nora Springs West Hills Golf Course - Devonian
Norseman Inn Best Western - Mississippian
North Cedar Park - Devonian
North Coralville Lake Manor - Silurian-Devonian
North End Mobile Home Park - Cambrian-Ordovician
North English - Cambrian-Ordovician
North Liberty - Cambrian-Ordovician
North Liberty - Silurian
North Linn High School - Silurian
North Twin View Heights - Silurian-Devonian
North Winneshiek Community School - Cambrian-Ordovician
Northwood - Devonian
Northwood Country Club - Devonian
Northwood Estates - Silurian

Oak Hills Par 30 Golf Course - Devonian
Oak Lake Maintenance - Dakota
Oak Ridge Recreation Association - Mississippian
Oak Shores - Dakota
Oak Valley - Silurian
Oakcrest Hills Estates - Buried Sand and Gravel
Oakdale Hospital Water System - Cambrian-Ordovician
Oakgrove Christian Church - Silurian-Devonian
Oakland - Alluvial
Oakland - Cambrian-Ordovician
Oakland - Devonian
Oakridge Homeowners Association - Devonian
Oakridge Lake Estates - Silurian
Oakville - Buried Sand and Gravel
Oakwood Park Water Association - Devonian
Oakwood Park Water, Inc. - Mississippian
Oakwood RV Park - Devonian
Obies West - Silurian
Ocheyedan - Alluvial
Odebolt - Alluvial
Odebolt - Cambrian-Ordovician
Odessa Dells - Buried Sand and Gravel
Oelwein - Cambrian-Ordovician
Ogden - Alluvial
Okoboji View Golf Course - Dakota
Olds - Cambrian-Ordovician
Oldtimers #3 South - Alluvial
Olin - Silurian
Onawa - Alluvial
Onawa KOA - Alluvial
Onslow - Silurian
Oran Tap and Cafe - Ordovician (abv St. Peter)
Orange City - Alluvial
Orange City - Dakota
Orchard - Devonian
Orchard Heights Subdivision - Silurian
Orchard View Estates - Silurian-Devonian
Osage - Devonian-Ordovician
Osborne Outdoor Education Center - Cambrian-Ordovician
Oscar Mayer Foods Corporation - Cambrian-Ordovician
Osceola Co. RWS North - Alluvial
Osceola RWS South - Alluvial
Oskaloosa - Alluvial
Ossian - Cambrian-Ordovician
Osterdock Store - Ordovician
Otho - Mississippian-Devonian
Oto - Alluvial
Ottosen - Dakota
Owasa Tap - Dakota
Oxford - Buried Sand and Gravel
Oxford Junction - Alluvial

P.M. Park Trustees-East - Buried Sand and Gravel
Palisades Dows Observatory - Silurian
Palisades Kepler State Park - Lodge - Silurian
Palisades Kepler State Park - Park Office - Silurian
Palmer - Buried Sand and Gravel
Palo Savings Bank - Alluvial
Palo, City Of - Silurian-Devonian
Panama - Alluvial
Paradise Valley Campground - Cambrian-Ordovician
Park View Water - Silurian
Parkersburg - Devonian
Parkview Mobile Home Court - Silurian
Parnell - Buried Sand and Gravel
Pathway Christian School - Mississippian
Paullina - Alluvial
Peace Reformed Church - unknown
Pella - Alluvial
Pella - Cambrian-Ordovician
Penn Center, Inc. - Silurian
Peosta Water Supply - Cambrian-Ordovician
Perry - Alluvial
Perry - Buried Sand and Gravel
Pershing - Cambrian-Ordovician
Petersen Properties - Silurian
Peterson - Buried Sand and Gravel
Pheasant Ridge Pro Shop - Silurian-Devonian
Pictured Rocks Methodist Camp - Silurian
Pierson - Alluvial
Pierson - Buried Sand and Gravel
Pikes Peak State Park - Cambrian-Ordovician
Pilot Knob Lutheran Church - Buried Sand and Gravel
Pilot Knob State Park-Campground - Devonian
Pilot Mound - Buried Sand and Gravel
Pilot Travel Center - Silurian-Devonian
Pine Bluff 4H Camp - Alluvial
Pine Creek Par 31 Golf Course - Devonian
Pine Grove Mennonite School - Devonian
Pine Lake Christian Center - Mississippian
Pine Ridge Park - Devonian
Pineo Grove Water Company - Silurian
Pinicon Ridge C - Silurian
Pinicon Ridge Campgrounds - Silurian
Pinnacle Foods Group - Alluvial
Pint's Subdivision - Silurian
Pinter's Garden Center - Cambrian-Ordovician
Pioneer Hi-Bred Durant Plant - Buried Sand and Gravel
Pisgah - Buried Sand and Gravel
Pla-Mor Bowl of Iowa Falls, Inc. - unknown
Plainfield - Devonian
Plantation Country View Subdivision - Ordovician (abv St. Peter)
Pleasant Creek Public Area 2 - Ordovician (abv St. Peter)
Pleasant Creek State Recreation Area (North) - Silurian
Pleasant Creek State Recreation Area (South) - Silurian
Pleasant Valley Golf Course - Alluvial
Pleasantville - Cambrian-Ordovician
Pleasent View Lodge - Silurian
Plover - Buried Sand and Gravel
Plum Creek Golf Club - Alluvial
Plum Creek Golf Course - Cambrian-Ordovician
Plymouth - Devonian
Plymouth Rock Campground - unknown
Pocahantas - Dakota
Polk City - Buried Sand and Gravel
Pomeroy - Buried Sand and Gravel
Ponderosa Ballroom - Devonian
Pony Creek Home Owners Association #1 - Buried Sand and Gravel
Postville - Cambrian-Ordovician
Potsie Inc - unknown
Poweshiek Water Association - Alluvial
Poweshiek Water Association - Iowa - Alluvial
Prairie City - Alluvial
Prairie View Acres Mobile Home Park - Devonian
Prairie View Estates - Silurian
Prairie Village Mobile Home - Alluvial
Prairieburg - Silurian
Prairies Edge Nature Center - Silurian-Devonian
Preston - Cambrian-Ordovician
Primera Foods - Devonian-Ordovician
Primghar - Dakota
Princeton - Silurian
Protivin - Cambrian-Ordovician
Pulpit Rock Campgrounds - Cambrian-Ordovician

Quail Run Country Club - Buried Sand and Gravel
Quail Run Country Club - unknown
Quakerdale - Devonian
Quality Water (Kennedy-Larch) - Cambrian-Ordovician
Quams Good Times Bar & Grill - Devonian
Quimby - Dakota

Rabiner Treatment Center - Mississippian-Devonian
Raccoon River Bible Camp - unknown
Racer's Bar & Grill - Dakota
Radcliffe - Mississippian
Rainbow Club - Silurian
Rake - Ordovician (abv St. Peter)
Ralston - Buried Sand and Gravel
Rancho Valley HOA - Silurian
Randall - Mississippian
Randolph - Alluvial
Rapid Creek Ridge HOA - Silurian
Rausch Petrolem Limited Co - Alluvial
Readlyn - Silurian
Red Man Inn - unknown
Red Oak - Dakota
Redfield - Alluvial
Redwing Estates HOA - Silurian
Regency West Subdivision - Cambrian-Ordovician
Regional Water - Alluvial
Reinbeck - Devonian
Rembrandt - Dakota
Rembrandt Enterprises Inc (Rembrandt) - Dakota
Remsen - Alluvial
Remsen - Dakota
Renwick - Mississippian
Revelle 1st & 2nd Subdivision - Silurian
Revelle 6th & 7th Addition - Silurian
Rhodys - Ordovician
Rice Lake Golf & Country Club - Devonian
Riceville - Devonian-Ordovician
Richland - Cambrian-Ordovician
Ridgeroad Development - Dakota
Ridgeway - Cambrian-Ordovician
Ridgeway - Ordovician
Riley Development - Ordovician
Rinard - Buried Sand and Gravel
Ringsted - Dakota
River Heights Property Owners Assoc. - Silurian-Devonian
River Highlands Subdivision - Silurian
River Oaks Development - Alluvial
River Ranch Camping - Buried Sand and Gravel
River Ridge Subdivision - Silurian-Devonian
River Road Golf Club - Dakota
Riverside - Buried Sand and Gravel
Riverside Lutheran Bible Camp - Mississippian
Riverton - Alluvial
Riverview Estates - Silurian
Riverview Subdivision - Silurian
RJ Thomas Manufacturing - unknown
Robinson-Dresser Sports Complex - Devonian
Rock Creek Marina & Campground - Silurian
Rock Falls Lounge - Devonian
Rock N Row Adventures - Mississippian
Rock Rapids - Alluvial
Rock Valley - Alluvial
Rock Valley Rural Water - Alluvial
Rockford - Devonian
Rockwell - Devonian
Rockwell City - Cambrian-Ordovician
Rocky Knoll Mobile Home Park - Devonian
Rocky Nook Association, Inc. - Silurian
Rockys Landing - unknown
Rodman - Dakota
Roland - Mississippian
Rolfe - Mississippian
Rolfe Golf Club - unknown
Rolling Acres Golf Course - unknown
Rolling Green Estates HOA - Silurian
Rolling Knolls Golf Course - Silurian
Round Grove Golf & Country Club - Devonian
Rowan - Mississippian-Devonian
Rowley Equipment - unknown
Royal Oaks Subdivision - Silurian
Royal Pines Village - Cambrian-Ordovician-Silurian
Rudd - Cambrian-Ordovician
Rudd - Devonian
Rural Water System #1 - Alluvial
Rural Water System #1 - Buried Sand and Gravel
Rustic Oaks Homeowners Association - Silurian
Ruthven - Dakota
Rutland - Mississippian
Ryan - Silurian

Sabula - Cambrian-Ordovician
Sac & Fox Community - Alluvial
Sac City - Buried Sand and Gravel
Saddle Bronc - Alluvial
Sageville Elementary School - Cambrian-Ordovician
Saint Joseph's Church - unknown
Saint Joseph's School & Parish - Ordovician (abv St. Peter)
Saint Luke Church & School - Ordovician (abv St. Peter)
Saint Olaf - Cambrian-Ordovician
Saint Paul Evangelical Church - unknown
Saint Peter & Paul Parish School - Silurian
Saints Avenue Apartments - Silurian-Devonian
Saints Peter & Paul Lutheran Church - unknown
Salem - Cambrian-Ordovician
Salem Church - Dakota
Salix - Alluvial
Sanborn - Buried Sand and Gravel
Sandy Beach Well Association - Mississippian
Sapp Bros. Truck Stop - Alluvial
Saratoga Presbyterian Church - Silurian-Devonian
Saulsbury Bridge - Education Center - Buried Sand and Gravel
Scales Point - Silurian-Devonian
Scarville Lutheran Church - Devonian
Scattergood Friends School - Silurian
Scenic Acres - Cambrian-Ordovician
Scenic View Campground - Cambrian-Ordovician
Scenic View Estates - Cambrian-Ordovician
Schaeff Inc. - Buried Sand and Gravel
Schaller - Dakota
Scherrmanns Implement - Ordovician (abv St. Peter)
Schuler Manufacturing - Buried Sand and Gravel
Scooters - Silurian
Scott County - Bald Eagle Campground - Silurian
Scott County Conservation - Silurian
Scott County Conservation Boad - Club House - Silurian
Scott County Park - Incahias - Silurian
Scott County Park - Nature Center - Silurian
Scott County Park - Pine Grove - Silurian
Scott County Park - Pool - Silurian
Scott County Park - Sac Fox - Silurian
Scott County Park - Whispering Pines - Silurian
Scranton - Buried Sand and Gravel
Sears 66 Service - unknown
Second Pleasant View Subdivision - Mississippian
Seed Savers Exchange - Ordovician
Sentral Community School - Silurian-Devonian
Sergeant Bluff - Alluvial-Dakota
Shady Creek Public Use Area 1 - Silurian
Shagbark Estates - Cambrian-Ordovician
Shambaugh - Alluvial
Sharon Bethel Church and School - unknown
Sharpless Auctions, Inc. - unknown
Sheffield - Devonian
Shelby - Alluvial
Shelby - Buried Sand and Gravel
Sheldahl - Buried Sand and Gravel
Sheldon - Alluvial
Sheldon - Dakota
Shell Rock - Devonian
Shell Rock Products, Inc. - Devonian
Shellsburg, City of - Cambrian-Ordovician
Shenandoah - Alluvial
Sherman's Water and Road - Cambrian-Ordovician
SHF Industries LLC - Cambrian-Ordovician
Shiloh - Alluvial
Shop N Go - unknown
Shueyville United Methodist Church - Silurian
Sidney - Alluvial
Sigourney - Cambrian-Ordovician
Sigourney - Mississippian
Silver City - Alluvial
Silvercrest Golf and Country Club - Cambrian-Ordovician
Sioux Center - Alluvial
Sioux Center - Buried Sand and Gravel
Sioux City - Alluvial
Sioux City - Dakota
Sioux Rapids - Alluvial
Siouxland Residential Inc. - Dakota
Sky Line Inn - Ordovician
Skyline Sportsman Club - Alluvial
Slaby's Tavern - Buried Sand and Gravel
Slater - Buried Sand and Gravel
Sleepy Hollow Campground & RV Park - Silurian
Sloan - Alluvial
Small's Fruit Farm - unknown
Smith Lake Park - Buried Sand and Gravel
Smithland - Buried Sand and Gravel
Soldier - Buried Sand and Gravel
Solon - Silurian
Some Place Bar & Grill - Ordovician
Somers - Mississippian
Sorbo Family Campground - Devonian
South Amana - Alluvial
South English - Alluvial
South Oaks Estates - Devonian
South Winn Golf Club - Cambrian-Ordovician
Southdale Home Owners Association - Devonian
Southern Sioux Rural Water - Alluvial
Southern Sioux Rural Water - Buried Sand and Gravel
Southern Sioux Rural Water - Dakota
Southpark - Mississippian
Southwest Polk - Alluvial
Sparboe Agricultural Corp. - Devonian
Sparboe Farms (Eagle Grove) - Silurian-Devonian
Sparboe Farms (Egg Breaking) - Silurian-Devonian
Sparboe Iowa Corporation - Mississippian
Spencer - Alluvial
Spencer Livestock Sales - Buried Sand and Gravel
Sperry - Buried Sand and Gravel
Spillville - Ordovician
Spillville - Ordovician (abv St. Peter)
Spillway Supper Club - Alluvial
Split Rock Park - Silurian-Devonian
Spook Cave - Cambrian-Ordovician
Sportsmen'S Club (Rossville) - unknown
Sportsmen Motel - Alluvial
Spring Lake Campground - Alluvial
Spring Valley Bible Camp - Devonian
Spring Valley Golf Club - Devonian
Spring Valley Homeowners Association - Silurian
Springbrook - Ordovician
Springbrook State Park - Dakota
Springville - Silurian
Spruce Creek Park #5 - Ordovician
Squaw Creek A - Silurian-Devonian
Squaw Valley - Buried Sand and Gravel
SSAB Iowa Inc. - Silurian
St John's Lutheran Church - Buried Sand and Gravel
St John Lutheran Church - Devonian
St Johns Lutheran Church - Silurian
St Johns Lutheran Church (Hampton) - Mississippian
St Pauls Maple Leaf Lutheran Church - unknown
St Peter Lutheran Church - Devonian
St Peters Rectory - Devonian
St. Ann's Catholic Church - Silurian
St. Ansgar - Devonian
St. Francis School - Ordovician (abv St. Peter)
St. John's Lutheran Church - Devonian
St. John's Lutheran Church - Mississippian
St. John Lutheran Church (Mineola) - Buried Sand and Gravel
St. Mary's Church - Devonian
St. Stephen's Catholic Church - Silurian
Stacyville - Devonian
Staff Motel - Devonian
Stagecoach Junction - Devonian
Stanhope - Mississippian
Stanton - Dakota
Stanwood - Silurian
Starmont Schools - Silurian
State Center - Cambrian-Ordovician
Steamboat Association - Silurian
Steamboat Rock - Mississippian
Stockton - Silurian-Devonian
Stone State Park - unknown
Stoney Creek North - Devonian
Stoney Creek Subdivision - Silurian
Stoney Pointe Subdivision - Silurian
Storm Lake - Buried Sand and Gravel
Storm Lake - Cambrian-Ordovician
Storm Lake - Dakota
Story City - Mississippian
Stout - Devonian
Stratford - Mississippian
Strawberry Point - Silurian
Stuart - Alluvial
Sumner - Cambrian-Ordovician
Sun Down Ski Resort - Ordovician (abv St. Peter)
Sunny Brae Golf & Country Club - Devonian
Sunnyside Village Mobile Park - Buried Sand and Gravel
Sunrise Village Mobile Home Park - Silurian
Super 20 Mobile Home Park - Ordovician
Super Bowl - Devonian
Sutherland - Dakota
Sw Iowa Renewable Energy Llc - unknown
Swaledale - Devonian
Swartzrock Implement Co. - Devonian
Swea City - Ordovician (abv St. Peter)
Swisher Trust & Savings Bank - Silurian-Devonian
Swiss Valley Farms Company - Ordovician
Swiss Valley Nature Center - Silurian
Swiss Valley Park - Ordovician (abv St. Peter)
Sylvia Ropp Home - Buried Sand and Gravel
Syngenta Seeds Inc - Buried Sand and Gravel

Table Mound Park - Cambrian-Ordovician
Tabor - Alluvial
Tall Corn Ethanol - Alluvial
Tama - Alluvial
TASC, Inc. - Cambrian-Ordovician
Teddy's Barn and Grill - Silurian
Temple Hill Catholic Church - Silurian
Terril - Buried Sand and Gravel
Terry Water Association - Devonian
The Amanas (Middle/East/Main/Golf Club) - Alluvial
The Barn - Ordovician (abv St. Peter)
The Barn (Buffalo Center) - Dakota-Devonian
The Celebration Farm LLC - Silurian-Devonian
The Chantland PVS Company - Mississippian
The Country Express - Cambrian-Ordovician
The Grove - Silurian
The Handle Bar - Ordovician
The Heights - unknown
The Junction - Alluvial
The Learning Journey - Buried Sand and Gravel
The Lucky Frog Bar & Grill - unknown
The Market At Oakwood - Buried Sand and Gravel
The Old Rossville Store - unknown
The Old Store - Ordovician (abv St. Peter)
The Pinicon - Devonian
The Pit Stop - unknown
The Playhouse Theatre - Alluvial
The Red Barn Resort - Cambrian-Ordovician
The Rose Bowl - Devonian
The Shanti, Inc. - Buried Sand and Gravel
The Wilds RV and Golf Resort - Alluvial
The Zipper - Ordovician (abv St. Peter)
Thompson - Dakota
Thor - Mississippian
Thornton - Devonian
Thorpe Park - Winnebago Co - Buried Sand and Gravel
Three Elms Golf Course - Silurian-Devonian
Three Fingers Campground - Devonian
Thunder Hills Home & Utility Association - Ordovician
Thunder Ridge Estates - Cambrian-Ordovician
Thurman - Alluvial
Tiffin - Cambrian-Ordovician
Tiffin - Silurian-Devonian
Timber Lake Estates - Silurian
Timber Ridge - Silurian
Timber Ridge Lodge - Dakota
Timber Trail Homeowners Association - Silurian
Timber Valley Estates - Silurian
Timber Valley Mobile Home - Mississippian
Timberlake - Silurian-Devonian
Timberlane Addition - Mississippian
Timberline Estates - Alluvial
Timberline Estates, Ltd. - Mississippian
Timberline Golf Course Inc. - Silurian-Devonian
Tipton - Silurian
Titonka - Devonian
Toledo - Cambrian-Ordovician
Town & Country Aqua Club - unknown
Traer - Cambrian-Ordovician
Traer Golf and Country Club - Alluvial
Treasure Village Inc - unknown
Treynor - Buried Sand and Gravel
Tri-City Golf Club - Ordovician
Tri-State Community Church - unknown
Tri-State Gun Club - unknown
Tri-State Raceways - Ordovician
Tripoli Water Supply - Devonian
Trout Valley Homeowners Association - Silurian
Troy Store - Silurian
Truck Country of Iowa - Ordovician (abv St. Peter)
Truckomat Corporation - Silurian
Turkey Creek Development - Silurian
Turkey Valley Community School - Cambrian-Ordovician
Turtle Creek Park (Delaware Conservation) - Silurian-Devonian
Twin Bridges Park - Cambrian-Ordovician
Twin County Dairy Inc - unknown
Twin Knolls Fourth/Fifth Addition - Silurian
Twin Lakes - Buried Sand and Gravel
Twin Lakes Golf Club - unknown
Twin Oak Camp Ground - unknown
Twin Ponds Park - Devonian
Twin Ridge Corporation - Ordovician (abv St. Peter)
Twin Springs Camp Area - Ordovician
Twin Springs West - Ordovician
Twin Valley Lakes Improvement Association - Silurian-Devonian
Tyson Fresh Meats Inc. Columbus Junction - Alluvial
Tyson Fresh Meats Inc. Columbus Junction - Cambrian-Ordovician

Union - Mississippian
United States Department of Interior - Cambrian-Ordovician
University of Iowa - Cambrian-Ordovician
UP Electronics - Silurian
Upper Deer Creek Church - Buried Sand and Gravel
Upper Iowa Resort and Rental - Cambrian
Urbana - Silurian-Devonian
Ute - Alluvial
Valley Heights 1st Annex - Silurian
Valley High School - Ordovician (abv St. Peter)
Valley Hill Court, Inc. - Ordovician
Valley Inn (Kendallville) - unknown
Valley Oaks Golf Club, Inc. - Silurian
Valley View - Buried Sand and Gravel
Valley View Estates #1 and #2 - Silurian
Van Meter - Alluvial
Varina - Buried Sand and Gravel
Ventura - Devonian
Verde Investments (Spring Valley Park) - Ordovician
Vern Acres (Oliphant Addition) - Silurian
Vern Laures Auto Center Inc - unknown
Vernon Heights Mobile Home Court - Silurian
Vernon Water Company - Cambrian-Ordovician
Victor - Buried Sand and Gravel
Village Creek Bible Camp-Lodge - Cambrian-Ordovician
Village Oaks Homeowners Association - Silurian
Villisca - Alluvial
Vincent - Devonian
Vincent - Mississippian
Vinje Pub - unknown
Vinton - Buried Sand and Gravel
Vista Hills - Silurian
Volga - Cambrian-Ordovician
Volga River Recreation Area - Silurian

Wadena - Ordovician (abv St. Peter)
Wagon Wheel - Silurian
Wahkonsa Country Club - Silurian
Walcott - Silurian
Waldenberg Community Water System - Silurian-Devonian
Waldschmidt Subdivision - Devonian
Walford Citgo - Silurian
Walker - Silurian, Ordovician, Cambrian-Ordovician
Wall Lake - Alluvial
Wallingford - Buried Sand and Gravel
Wallingford - Dakota-Ordovician
Walnut - Ordovician
Walnut Acres Campground - Alluvial
Walters Mobile Home Park - Cambrian-Ordovician
Wapello - Alluvial
Wapello Rural Water - Alluvial
Wapsi Oaks Country Club - Silurian
Wapsi River Environmental Education Ctr - Silurian
Wapsie Ridge Golf Course, Inc. - Buried Sand and Gravel
Wapsie Valley Community School (Fairbank) - Cambrian-Ordovician
Wapsie Valley Creamery, Inc. - Silurian-Devonian
Wapsipinicon Country Club - Silurian
Wapsipinicon Golf Club - Silurian-Devonian
Wapsipinicon State Park Campground - Silurian
Washington - Cambrian-Ordovician
Washington Prairie Lutheran Church - Cambrian-Ordovician
Washington Twsh. Elementary School - Buried Sand and Gravel
Washta - Buried Sand and Gravel
Waterford Estates - Ordovician
Waterhouse Home Owners Association - Silurian-Devonian
Waterloo - Alluvial
Waterloo - Silurian-Devonian
Waterville Bar and Grill - Ordovician
Waterville Elementary School - Ordovician
Waubonsie State Park Bridle Trail - Buried Sand and Gravel
Waubonsie State Park Overlook - Buried Sand and Gravel
Waucoma - Ordovician
Waukee - Cambrian-Ordovician
Waukon - Cambrian-Ordovician
Waverly - Silurian-Devonian
Wayland - Cambrian-Ordovician
Wayne Zion Lutheran Church - Silurian
Webster - Mississippian
Webster City - Cambrian-Ordovician
Wellman - Buried Sand and Gravel
Welton - Ordovician
Wendram Bluff Homes Water System - Silurian
Wesley - Devonian
West Bend - Cambrian-Ordovician
West Bend - Dakota
West Branch - Cambrian-Ordovician
West Branch - Silurian
West Central Iowa RWA - Boyer - Alluvial
West Central Iowa RWA - Nishnabotna - Alluvial
West Chester - Mississippian
West Des Moines - Alluvial
West Des Moines - Cambrian-Ordovician
West Grand Golf Course - Alluvial
West Lake - Lakeview - Silurian
West Lake - Park Terrace - Silurian
West Lake - Summit Campground - Silurian
West Lake Lounge Llc - unknown
West Liberty - Cambrian-Ordovician
West Liberty Foods - Cambrian-Ordovician
West Liberty Foods - Silurian-Devonian
West Okoboji Harbor Association - Buried Sand and Gravel
West Post Estates Addition - Buried Sand and Gravel
West Union - Cambrian-Ordovician
West Union - Silurian
West Union Country Club - Cambrian-Ordovician
Westcott Heights - Silurian
Westcott Heights HOA - Silurian-Devonian
Western Hills - Devonian
Western Hills (Mobile) Estates - Devonian
Westfair - Buried Sand and Gravel
Westfield - Dakota
Westgate Water Supply - Silurian
Westside Tap In Toronto, Corp. - Silurian
Wheatland - Cambrian-Ordovician
Wheatland - Silurian
White House Supper Club - Ordovician (abv St. Peter)
Whiting - Alluvial
Whittemore - Devonian
Wickiup Hill Outdoor Learning Center - Silurian
Wiele Motor - Buried Sand and Gravel
Wild Flower Ridge Subdivision - Cambrian-Ordovician
Wildcat Den State Park-Fairport Station - Silurian-Devonian
Wildcat Den State Park Well 1 - Silurian-Devonian
Wildcat Den State Park Well 2 - Silurian
Wildwood Water Corporation - Alluvial
Wilkinson Pioneer Park - Devonian
Williams - Mississippian
Williamsburg - Buried Sand and Gravel
Willow Stream Estates Mobile Home - Silurian
Wilson Island State Rec Area - Alluvial
Wilson Subdivision Well #9 - Mississippian
Wilton - Buried Sand and Gravel
Wilton - Silurian
Winchester Heights Subdivision - Silurian
Wind and Fire Ministries - Silurian
Winding Brook Mobile Home Park - Silurian
Windmill Ridge Campground - Buried Sand and Gravel
Windy Ridge Well Association - Silurian
Winfield - Cambrian-Ordovician
Winnebago Scout Reservation - Devonian
Winthrop - Silurian-Devonian
Wiota - Dakota-Pennsylvanian
Woden - Ordovician (abv St. Peter)
Woden Christian Reformed Church - Buried Sand and Gravel
Woodbine - Dakota
Woodland Acres MHP - Mississippian
Woodland Camp - Alluvial
Woodland Estates Improvement Association - Silurian
Woodland Heights Homeowners Assoc. - Silurian
Woodland Mobile Home Park - Buried Sand and Gravel
Woodland Ridge Subdivision - Silurian
Woodlyn Hill Golf Course - Buried Sand and Gravel
Woodlyn Hills - Dakota-Devonian
Woods and Meadows Subdivision - Silurian
Woods at Hunter Creek - Silurian
Woodward - Buried Sand and Gravel
Woodward Resource Center - Buried Sand and Gravel
Woolstock - Mississippian
Word Center Ministries - unknown
Word Of Faith Dominion Church - Buried Sand and Gravel
Worth County Interchange 214 - Devonian
Worthington - Cambrian-Ordovician
Wyoming - Silurian

Xenia Rural Water District - Alluvial
Xenia RWD - Buried Sand and Gravel
Yale - Pennsylvanian
Yankee Grove Development - Silurian
Yankee Grove Part 3 - Silurian
Yellow River State Forest - Cambrian (blw St. Lawrence)
Yetter - Dakota
YMCA Camp Wapsie - Silurian
Ziegler Cat - unknown
Zion Reform Church - Mississippian