| HIGHWAY SURFACING CORPORATION | ADAIR | IA |
| HORMEL PLANT | ALGONA | IA |
| AMANA REFRIGERATION | AMANA | IA |
| AMES MUNICIPAL ELCTRIC SYSTEM | AMES | IA |
| AMES MUNICIPAL ELECTRIC | AMES | IA |
| AMES MUNICIPAL UTILITIES | AMES | IA |
| Ames Municipal Utilties | Ames | IA |
| AMES-FARMER CANNING CO | AMES | IA |
| ANIMAL DISEASES LABORATORY | AMES | IA |
| DEPARTMENT OF ME | AMES | IA |
| Electrical Eng. Bldg., Iowa St. College | Ames | IA |
| GENERAL SERVICES ADMINISTRATION – ANIMAL DISEASE LAB | AMES | IA |
| Iowa State College | Ames | IA |
| IOWA STATE COLLEGE | AMES | IA |
| IOWA STATE COLLEGE – PHYSICAL PLANT DEPT. | AMES | IA |
| IOWA STATE COLLEGE HEATING PLANT | AMES | IA |
| IOWA STATE HWY COMMISSION | AMES | IA |
| IOWA STATE UNIVERSITY – GENERATOR #5 | AMES | IA |
| IOWA STATE UNIVERSITY – GENERATOR #5 | AMES | IA |
| McFarland Clinic | Ames | IA |
| POWER PLANT NBR 2 UNIT 7 | AMES | IA |
| JOHN DEERE DES MOINES | ANKENY | IA |
| JOHN DEERE WORKS | ANKENZ | IA |
| PATRICK HARDWARE | APELLE | IA |
| ATLANTIC MUNICIPAL UTILTITES | ATLANTIC | IA |
| CITY OF ATLANTIC | ATLANTIC | IA |
| Municipal Light & Water Plant | Atlantic | IA |
| Municipal Power Plant | Atlantic | IA |
| Town of Belle Plaine | Belle Plaine | IA |
| GENERAL MILLS | BELMOND | IA |
| IOWA VALLEY SUGAR CO. INC. | BELMOND | IA |
| BENNETT HIGH SCHOOL | BENNETT | IA |
| Alcoa | Betten Dorf | IA |
| BETTENDORF COMMUNITY SCHOOL | BETTENDORF | IA |
| BETTENDORF HIGH SCHOOL | BETTENDORF | IA |
| DONOHOL STEEL TREATING | BETTENDORF | IA |
| DONOHOO STEEL TREATING CO | BETTENDORF | IA |
| DONOHOO TREATING CO | BETTENDORF | IA |
| GRANDWOOD SCHOOL | BETTENDORF | IA |
| J I CASE CO | BETTENDORF | IA |
| J T CASE CO | BETTENDORF | IA |
| J W DAVIS CO | BETTENDORF | IA |
| J.I. CASE COMPANY | BETTENDORF | IA |
| Riverside Generating Plant | Bettendorf | IA |
| S W MANUFACTURING CO | BETTENDORF | IA |
| Sivyer Steel Casting Co | Bettendorf | IA |
| SIVYER STEEL CASTINGS | BETTENDORF | IA |
| Sivyer Steel Corporation | Bettendorf | IA |
| MEEKS BROTHERS | BONAPARTE | IA |
| A T & T CO. – UNDERGROUND COAXIAL CABLE BLDG | BOONE | IA |
| HAWKEYE LAUNDRY CO | BOONE | IA |
| Iowa Electric Light & Power | Boone | IA |
| IOWA ELECTRIC LIGHT & POWER | BOONE | IA |
| IOWA ELECTRIC LIGHT & POWER – BOONE POWER STATION | BOONE | IA |
| IOWA ELECTRIC LIGHT & POWER CO. | BOONE | IA |
| IOWA ELECTRIC LIGHT AND POWER CO | BOONE | IA |
| NORTHWESTERN CONSTRUCTION CO. | BOONE | IA |
| QUINN WIRE & IRON CO | BOONE | IA |
| HOOKER CHEMICAL COMPANY | BUFFALO | IA |
| LEOPOLD DESK CO | BURLIGTON | IA |
| BURLINGTON HIGH SCHOOL | BURLINGTON | IA |
| Burlington Northern Railroad | Burlington | IA |
| BURLINGTON ORDNANCE WORKS | BURLINGTON | IA |
| Consolidated Packing | Burlington | IA |
| Des Moines Company Drainage | Burlington | IA |
| INTERSTATE POWER AND LIGHT COMPANY | BURLINGTON | IA |
| IOWA ORDNANCE PLANT | BURLINGTON | IA |
| IOWA SOUTHERN POWER STATION | BURLINGTON | IA |
| IOWA SOUTHERN UTILITIES CO – BURLINGTON GENERATING STA RR – NBR 1 | BURLINGTON | IA |
| MURRAY IRON WORKS | BURLINGTON | IA |
| PAUL HOSHEK | BURLINGTON | IA |
| PEOPLES GAS AND ELECTRIC CO. | BURLINGTON | IA |
| SILAS MASON CO – IAAP | BURLINGTON | IA |
| SILAS MASON CO – IOWA ORDINANCE PLANT | BURLINGTON | IA |
| Burlington Generation Station | BURLINGTON | IA |
| Ies Utilities | BURLINGTON | IA |
| CARROL RENDERING | CARROL | IA |
| PAXTON & VIERLING STEEL | CARTER LAKE | IA |
| PAXTON & VISHLING STEEL | CARTER LAKE | IA |
| CEDAR FALLS MUNICIPAL UTILITIES/STREETER PLANT | CEDAR FALLS | IA |
| CEDAR FALLS PAPER MANUFACTURING CO | CEDAR FALLS | IA |
| CEDAR FALLS UTILITIES | CEDAR FALLS | IA |
| CEDAR FALLS UTILITIES | CEDAR FALLS | IA |
| Cedar Falls Utilities – Streeter Unit 7 | Cedar Falls | IA |
| JOHN NEFF CEDAR FALLS PAPER CO | CEDAR FALLS | IA |
| MUNICIPAL ELECTRIC UTILITIES | CEDAR FALLS | IA |
| MUNICIPAL LIGHT & POWER CO | CEDAR FALLS | IA |
| UNIVERSITY OF NORTHERN IOWA | CEDAR FALLS | IA |
| UNIVERSITY OF NORTHERN IOWA | CEDAR FALLS | IA |
| UNIVERSITY OF NORTHERN IOWA – PHYSICAL PLANT WALKER | CEDAR FALLS | IA |
| AMERICAN CEREAL CO | CEDAR RAPIDS | IA |
| CARGILL INC | CEDAR RAPIDS | IA |
| Cargill, Inc. | Cedar Rapids | IA |
| CARGILL, INC. | CEDAR RAPIDS | IA |
| CEDAR RAPIDS AND IOWA CITY RAILWAY AND LIGHT CO. | CEDAR RAPIDS | IA |
| CEDAR RAPIDS AND IOWA CITY RAILWAY LT CO | CEDAR RAPIDS | IA |
| CEDAR RAPIDS ELECTRIC LIGHT AND POWER CO. | CEDAR RAPIDS | IA |
| CEDAR RAPIDS GALVANIZING | CEDAR RAPIDS | IA |
| Cedar Rapids Nuclear Powerhouse | Cedar Rapids | IA |
| COLLINS RADIO | CEDAR RAPIDS | IA |
| COLLINS RADIO – COMPUTER DATA BLDG | CEDAR RAPIDS | IA |
| Collins Radio Building | Cedar Rapids | IA |
| CORN STARCH & SYRUP | CEDAR RAPIDS | IA |
| DOUGLAS CO | CEDAR RAPIDS | IA |
| DOWNING BOX CO | CEDAR RAPIDS | IA |
| Duane Arnold Nuclear Powerhouse | Cedar Rapids | IA |
| Frank Zobac Construction | Cedar Rapids | IA |
| I E S | CEDAR RAPIDS | IA |
| IOWA ELEC LIGHT POWER CO | CEDAR RAPIDS | IA |
| IOWA ELECTRIC LIGHT & POWER | CEDAR RAPIDS | IA |
| IOWA ELECTRIC LIGHT & POWER CO. | CEDAR RAPIDS | IA |
| Iowa Electric Light & Power Co. – Centralized Load Dispatching Headquarters | Cedar Rapids | IA |
| IOWA ELECTRIC LIGHT & POWER COMPANY – 6TH STREET POWER PLANT | CEDAR RAPIDS | IA |
| IOWA ELECTRIC LIGHT & POWER COMPANY – DUANE ARNOLD POWER PLANT | CEDAR RAPIDS | IA |
| IOWA ELECTRIC LIGHT & POWER COMPANY – PRAIRIE CREEK POWER HOUSE | CEDAR RAPIDS | IA |
| IOWA ELECTRIC LIGHT AND POWER CO. | CEDAR RAPIDS | IA |
| IOWA MANUFACTURING CO | CEDAR RAPIDS | IA |
| Iowa Steel & Iron Works | Cedar Rapids | IA |
| JOHNSON GAS APPLIANCE CO | CEDAR RAPIDS | IA |
| JOHNSON GAS APPLIANCE COM | CEDAR RAPIDS | IA |
| KINGS CONCRETE CO | CEDAR RAPIDS | IA |
| LATINER P M MFG CO | CEDAR RAPIDS | IA |
| LATTNER MFG CO | CEDAR RAPIDS | IA |
| LATTNER MFG CO P M | CEDAR RAPIDS | IA |
| LATTNER P M MFG CO | CEDAR RAPIDS | IA |
| LONGVIEW FIBRE CO. | CEDAR RAPIDS | IA |
| MIDLAND INDUSTRIES INC | CEDAR RAPIDS | IA |
| Penic & Ford | Cedar Rapids | IA |
| PENICH & FORD LIMITED | CEDAR RAPIDS | IA |
| PENICK & FORD, LTD. | CEDAR RAPIDS | IA |
| PETER PAN BAKERS INC | CEDAR RAPIDS | IA |
| PUTNAM ASBESTOS COMPANY | CEDAR RAPIDS | IA |
| QUAKER OATS | CEDAR RAPIDS | IA |
| Quaker Oats Company | Cedar Rapids | IA |
| ROCKWELL COLLINS | CEDAR RAPIDS | IA |
| Sheetmetal Workers Union-local 263 | Cedar Rapids | IA |
| STAR GALVANIZING CO | CEDAR RAPIDS | IA |
| T M. SINCLAIR AND CO. | CEDAR RAPIDS | IA |
| TAYLOR INSULATION CO. | CEDAR RAPIDS | IA |
| WAYNE MANUFACTURING CO | CEDAR RAPIDS | IA |
| WILSON & CO., INC. | CEDAR RAPIDS | IA |
| WILSON & COMPANY | CEDAR RAPIDS | IA |
| WILSON AND CO INC. | CEDAR RAPIDS | IA |
| WILSONS FOODS | CEDAR RAPIDS | IA |
| Y.M.C.A. | Cedar Rapids | IA |
| Johnson Gas Appliance Company | CEDAR RAPIDS | IA |
| Globe Machine & Supply Company | CEDAR RAPIDS | IA |
| ALLERTON GAS CO | CENTERVILLE | IA |
| CENTERVILLE LIGHT AND TRACTION CO | CENTERVILLE | IA |
| IOWA SOUTHERN UTILITIES CO | CENTERVILLE | IA |
| IOWA SOUTHERN UTILITIES CO | CENTERVILLE | IA |
| JOHNSON MACHINE WORKS INC | CHARITON | IA |
| JOHNSTON TOMBIGBEE FURNIT | CHARITON | IA |
| DR. SALSBURY’S LABORATORY | CHARLES CITY | IA |
| IOWA PUBLIC SERVICE CO. | CHARLES CITY | IA |
| OLIVER CORP | CHARLES CITY | IA |
| OLIVER CORPORATION | CHARLES CITY | IA |
| Oliver Farm Equipment Company | Charles City | IA |
| SALSBURYS LABORATORY | CHARLES CITY | IA |
| SALSBURYS LABORATORY – POWER HOUSE ADDITION | CHARLES CITY | IA |
| CHEROKEE STATE HOSPITAL | CHEROKEE | IA |
| MENTAL HEALTH INSTITUTE | CHEROKEE | IA |
| Wilson Packing | Cherokee | IA |
| CLARINDA STATE HOSPITAL | CLARINDA | IA |
| IOWA STATE HOSPITAL | CLARINDA | IA |
| AMERICAN WIRE CLOTH MANUFACTURING. CO | CLINTON | IA |
| ARCHER DANIELS MIDLAND | CLINTON | IA |
| ARCHER DANIELS MIDLAND CO | CLINTON | IA |
| BEAVER CHANNEL STATION UNIT 2 | CLINTON | IA |
| BOARD OF EDUCATION | CLINTON | IA |
| BURLINGTON NORTHERN SANTA FE RAILROAD | CLINTON | IA |
| BURPEE SEED COMPANY | CLINTON | IA |
| CENTRAL STEEL | CLINTON | IA |
| CENTRAL STEEL TUBE COMPANY | CLINTON | IA |
| CHEMICAL PLANT | CLINTON | IA |
| Chemplex | Clinton | IA |
| CHEMPLEX CONSTR PETROCHEMICAL | CLINTON | IA |
| CHEMPLEX CONSTR. CO. | CLINTON | IA |
| CHEMPLEX CONSTRUCTION | CLINTON | IA |
| CHEMPLEX CONSTRUCTION | CLINTON | IA |
| CHEMPLEX CONSTRUCTION CO | CLINTON | IA |
| Chemplex Construction/ USI | Clinton | IA |
| CHEMPLEX CORPORATION | CLINTON | IA |
| CHICAGO & NORTHWESTERN | CLINTON | IA |
| CHICAGO & NORTHWESTERN RR | CLINTON | IA |
| CLINTON CO | CLINTON | IA |
| CLINTON CORN PROCESSING CO | CLINTON | IA |
| CLINTON CORN PROCESSING CO | CLINTON | IA |
| CLINTON CORN PROCESSING CO DIV OF STANDARD BRANDS INC | CLINTON | IA |
| CLINTON CORN PROCESSING CO. | CLINTON | IA |
| CLINTON CORN PROCESSING CO. – NEW BOILER ADDITION | CLINTON | IA |
| CLINTON CORN PROCombustion EngineeringSSING COMPANY | CLINTON | IA |
| CLINTON CORN SYRUP REFINING CO | CLINTON | IA |
| CLINTON CORP SYRUP REFINERY CO. AM,ENG, WATERCOOLED BRIDGEWALL | CLINTON | IA |
| CLINTON GENERAL HOSPITAL | CLINTON | IA |
| CLINTON INDUSTRIES, INC. | CLINTON | IA |
| CLINTON PRODUCTS CO | CLINTON | IA |
| CLINTON STEAM LAUNDRY CO. | CLINTON | IA |
| CLINTON SUGAR REFINING CO | CLINTON | IA |
| CURTIS BROTHERS AND CO. | CLINTON | IA |
| Dupont | Clinton | IA |
| E I DUPONT DE NEMOURS CO | CLINTON | IA |
| E. I. DUPONT DE NEMOURS & CO. | CLINTON | IA |
| E.I. Du Pont De Nemours | Clinton | IA |
| FLUOR CORP. | CLINTON | IA |
| FLUOR CORPORATION LIMITED | CLINTON | IA |
| HAWKEYE CHEMICAL | CLINTON | IA |
| HAWKEYE CHEMICAL CO | CLINTON | IA |
| Hawkeye Chemical Co | Clinton | IA |
| HAWKEYE CHEMICAL CO | CLINTON | IA |
| Hawkeye Chemical Company | Clinton | IA |
| HAWKEYE CHEMICAL PLANT | CLINTON | IA |
| INTERSTATE POWER AND LIGHT COMPANY | CLINTON | IA |
| INTERSTATE POWER CO | CLINTON | IA |
| INTERSTATE POWER COMPANY – M.L. KAPP STATION | CLINTON | IA |
| INTERSTATE POWERHOUSE | CLINTON | IA |
| IOWA AND ILLINOIS RAILWAY CO. | CLINTON | IA |
| OAKES THOMAS CO | CLINTON | IA |
| SHICK GENERAL HOSPITAL | CLINTON | IA |
| SWIFT & COMPANY | CLINTON | IA |
| UNION PACIFIC RAILROAD | CLINTON | IA |
| Dupont Plant | CLINTON | IA |
| Hawkeye Chemical Company | CLINTON | IA |
| National By Products Inc. | CLINTON | IA |
| CENTRAL STEEL TUBE CO | CLINTON & CAMANCHE | IA |
| MUNICIPAL LIGHT PLANT | COGGON | IA |
| RATH PACKING COMPANY | COLUMBUS JCT | IA |
| RATH PACKING CO | COLUMBUS JUNCTION | IA |
| RUTH PACKING COMPANY | COLUMNS JUNCTION | IA |
| IOWA CITY LIGHT AND POWER CO. | CORALLVILLE | IA |
| IOWA CITY LIGHT AND POWER CO. | CORELVILLE | IA |
| Iowa Electric Light & Power | Council Bluff | IA |
| Jennie Edmundson Hospital | Council Bluff | IA |
| OMAHA STANDARD | COUNCIL BLUFF | IA |
| Standard Oil Company of Indiana | Council Bluff | IA |
| Council Bluffs Powerhouse | Council Bluffs | IA |
| GRIFFIN PIPE | COUNCIL BLUFFS | IA |
| IOWA ELECTRIC LIGHT & POWER CO. | COUNCIL BLUFFS | IA |
| IOWA POWER & LIGHT | COUNCIL BLUFFS | IA |
| IOWA POWER & LIGHT CO | COUNCIL BLUFFS | IA |
| IOWA POWER & LIGHT CO | COUNCIL BLUFFS | IA |
| IOWA POWER AND LIGHT CO. | COUNCIL BLUFFS | IA |
| MIDAMERICAN ENERGY CO | COUNCIL BLUFFS | IA |
| MIDWEST POWER | COUNCIL BLUFFS | IA |
| POWER PLANT | COUNCIL BLUFFS | IA |
| UNION PACIFIC | COUNCIL BLUFFS | IA |
| UNION PACIFIC RAILROAD CO. | COUNCIL BLUFFS | IA |
| IOWA ELECTRIC LIGHT & POWER | CRANDIC | IA |
| IOWA ELECTRIC LIGHT & POWER – SIXTH STREET POWER STATION | CRANDIC | IA |
| IOWA ELECTRIC LIGHT & POWER CO. | CRANDIC | IA |
| IOWA POWER & LIGHT CO | CRANDIC | IA |
| GREEN VALLEY CHEMICAL CO | CRESTON | IA |
| HILLS-MCCANNA | CRESTON | IA |
| J.F. PRITCHARD & COMPANY | CRESTON | IA |
| SOWEST FEDERATED POWER | CRESTON | IA |
| BECK & WAGNER | DANVILLE | IA |
| Alcoa (F/K/A Reynolds Metals) | Davenport | IA |
| ALCOA COMPANY | DAVENPORT | IA |
| ART BROWN MOTORS | DAVENPORT | IA |
| BIXBY W H INC | DAVENPORT | IA |
| BIXBY W I INC | DAVENPORT | IA |
| BIXBY, W.H. INC | DAVENPORT | IA |
| BLACKHAWK FOUNDRY | DAVENPORT | IA |
| BOARD OF EDUCATION | DAVENPORT | IA |
| BRAMMER MANUFACTURING | DAVENPORT | IA |
| DAVENPORT BANK BUILDING | DAVENPORT | IA |
| DAVENPORT CENTRAL HIGH SCHOOL | DAVENPORT | IA |
| DAVENPORT COMMUNITY SCHOOL | DAVENPORT | IA |
| DAVENPORT GAS AND ELECTRIC CO. | DAVENPORT | IA |
| DAVENPORT GLUCOSE MANUFACTURING CO | DAVENPORT | IA |
| Davenport Iowa Wastesater Treatment Plant | Davenport | IA |
| DAVENPORT WATER CO | DAVENPORT | IA |
| DEWEY PORTLAND CEMENT CO | DAVENPORT | IA |
| ECONOMY ROOFING & INS. CO. | DAVENPORT | IA |
| FAIRMONT CEMETARY | DAVENPORT | IA |
| FIRST NATIONAL BUILDING | DAVENPORT | IA |
| FRANK FOUNDRIES | DAVENPORT | IA |
| FRANK FOUNDRIES CORP | DAVENPORT | IA |
| FRANK L SMART JR HI SCH | DAVENPORT | IA |
| French Hecht, Inc. | Davenport | IA |
| GALESBURG SR. HIGH SCHOOL | DAVENPORT | IA |
| GATE CITY STEEL | DAVENPORT | IA |
| GLUCOSE SUGAR REFINNING CO. | DAVENPORT | IA |
| GRANDVIEW BAPTIST CHURCH | DAVENPORT | IA |
| GRANT SCHOOL | DAVENPORT | IA |
| HOOKER CHEM CORP PHOSPHOR DIV | DAVENPORT | IA |
| HOOKER CHEM CORP PHOSPHORUS | DAVENPORT | IA |
| IOWA-ILLINOIS GAS AND ELECTRIC CO. | DAVENPORT | IA |
| JOHNSON SCHOOL | DAVENPORT | IA |
| KAHL BUILDING | DAVENPORT | IA |
| KOHRS COLD STORAGE CO. | DAVENPORT | IA |
| Linde Air Products Co. (Union Carbide & Carbon Corp.) | Davenport | IA |
| Martin Marietta Cement Company | Davenport | IA |
| MCCARTHY IMPROVEMENT | DAVENPORT | IA |
| MCGUINESS C H & CO | DAVENPORT | IA |
| MCKINLEY SCHOOL | DAVENPORT | IA |
| MERCY HOSPITAL | DAVENPORT | IA |
| Monsanto | Davenport | IA |
| NICHOLS ALUMINUM & WIRE | DAVENPORT | IA |
| NICHOLS ALUMINUM COMPANY | DAVENPORT | IA |
| NICHOLS WIRE | DAVENPORT | IA |
| NICHOLS WIRE & ALUM CO | DAVENPORT | IA |
| NICHOLS WIRE & ALUM INC | DAVENPORT | IA |
| NICHOLS WIRE & ALUMINUM CO | DAVENPORT | IA |
| OSCAR MAYER & CO | DAVENPORT | IA |
| OSCAR MAYER & CO – POWER PLANT | DAVENPORT | IA |
| OSCAR MAYER & CO. | DAVENPORT | IA |
| OSCAR MAYER AND CO | DAVENPORT | IA |
| OSCAR MAYER AND CO INC | DAVENPORT | IA |
| OSCAR MAYER PACKING CO. | DAVENPORT | IA |
| OSCAR MEYER AND CO. | DAVENPORT | IA |
| OSCAR MEYER FOODS CO. | DAVENPORT | IA |
| PEOPLES LIGHT CO | DAVENPORT | IA |
| PUTNAM BUILDING | DAVENPORT | IA |
| RED JACKET M F G COMPANY | DAVENPORT | IA |
| SALVATION ARMY | DAVENPORT | IA |
| SALVATION ARMY HOME | DAVENPORT | IA |
| SMART JUNIOR HIGH SCHOOL | DAVENPORT | IA |
| ST. AMBROSE COLLEGE | DAVENPORT | IA |
| SUDLOW JR. HIGH SCHOOL | DAVENPORT | IA |
| TAYLOR SCHOOL | DAVENPORT | IA |
| UNITED LIGHT AND RAILWAYS. CO. | DAVENPORT | IA |
| WHITEHEAD MACHINERY CO | DAVENPORT | IA |
| Iowa Illinois Thermal Insulation | DAVENPORT | IA |
| Jp Austin Associated Inc | DAVENPORT | IA |
| Alcoa | DAVENPORT | IA |
| DENISON HOTEL | DENISON | IA |
| DENSION HOTEL | DENSION | IA |
| AMERICAN REPUBLIC INS CO BLDG | DES MOINES | IA |
| AP GREEN REFRACTORIES CO | DES MOINES | IA |
| ARCHER DANIELS MIDLAND | DES MOINES | IA |
| Armstrong Rubber | Des Moines | IA |
| ARMSTRONG RUBBER COMPANY | DES MOINES | IA |
| ARMSTRONG RUBBER COMPANY | DES MOINES | IA |
| ARMSTRONG RUBBER MANUFACTURING CO. | DES MOINES | IA |
| BALLSFORD STATION | DES MOINES | IA |
| BIXBY CO INC W H | DES MOINES | IA |
| BIXBY W H INC | DES MOINES | IA |
| BIXBY W I INC | DES MOINES | IA |
| BIXBY, W.H. INC | DES MOINES | IA |
| BIXBY, W.H. INC. | DES MOINES | IA |
| BOARD OF CONTROL | DES MOINES | IA |
| BOARD OF CONTROL OF STATE INSTITUTIONS | DES MOINES | IA |
| BOARD OF EDUCATION | DES MOINES | IA |
| BRIDGESTONE FIRESTONE | DES MOINES | IA |
| C GILBERT | DES MOINES | IA |
| C H MCGUINESS CO | DES MOINES | IA |
| CARGILL INC | DES MOINES | IA |
| CARGILL SOYBEAN PLANT | DES MOINES | IA |
| Central Asbestos & Supply | Des Moines | IA |
| CENTRAL SERVICE CO | DES MOINES | IA |
| CH MCGUINESS CO | DES MOINES | IA |
| CITY ICE CO | DES MOINES | IA |
| CITY PLUMBING SUPPLY | DES MOINES | IA |
| COUNCIL BLUFFS, UNIT 3 | DES MOINES | IA |
| DES MOINES BREWING CO. | DES MOINES | IA |
| DES MOINES CITY RAILWAY CO. | DES MOINES | IA |
| DES MOINES EDISON CO | DES MOINES | IA |
| DES MOINES EDISON LIGHT CO. | DES MOINES | IA |
| DES MOINES ELECTRIC CO | DES MOINES | IA |
| DES MOINES POWER STATION, NO. 2 | DES MOINES | IA |
| DES MOINES RAILWAY CO | DES MOINES | IA |
| DES MONIES CITY RAILWAY CO. | DES MOINES | IA |
| EAGLE IRON WORKS | DES MOINES | IA |
| EDISON ELECTRIC CO | DES MOINES | IA |
| EDISON ELECTRIC LIGHT CO. | DES MOINES | IA |
| EXECUTIVE COUNCIL OF IOWA | DES MOINES | IA |
| FARM BUREAU | DES MOINES | IA |
| Firestone | Des Moines | IA |
| Firestone Tire & Rubber Co. | Des Moines | IA |
| FIRESTONE TIRE AND RUBBER CO | DES MOINES | IA |
| Fust Herman H & Co | Des Moines | IA |
| GLOBE MACHINERY & SUPPLY COMPANY | DES MOINES | IA |
| HANSEN BROTHERS | DES MOINES | IA |
| HAWKEYE TIRE AND RUBBER CO | DES MOINES | IA |
| HOME FEDERAL SAVINGS & LOAN ASSOCIATION | DES MOINES | IA |
| HOME FEDERAL SAVINGS AND LOAN – ASSOCIATION BLDG | DES MOINES | IA |
| INTERNATIONAL DISTILLING CO | DES MOINES | IA |
| IOWA AIR NATIONAL GUARD – BASE OPERATIONS OFFICE | DES MOINES | IA |
| IOWA AIR NATIONAL GUARD – BASE OPERATIONS OFFICE | DES MOINES | IA |
| IOWA ASBESTOS CO. | DES MOINES | IA |
| Iowa Asbestos Company | Des Moines | IA |
| Iowa Electric Light & Power | Des Moines | IA |
| IOWA PACKING CO | DES MOINES | IA |
| Iowa Packing Company | Des Moines | IA |
| IOWA PORTLAND CEMENT CO | DES MOINES | IA |
| IOWA POWER & LIGHT | DES MOINES | IA |
| IOWA POWER & LIGHT CO | DES MOINES | IA |
| IOWA POWER & LIGHT COMPANY – VANDALIA ROAD | DES MOINES | IA |
| IOWA POWER & LIGHT COMPANY – VANDALIA ROAD | DES MOINES | IA |
| Iowa Power & Light Powerhouse | Des Moines | IA |
| IOWA POWER AND LIGHT | DES MOINES | IA |
| IOWA POWER AND LIGHT CO | DES MOINES | IA |
| IOWA STATE BOARD OF EDUCATION | DES MOINES | IA |
| IOWA STATE CAPITOL | DES MOINES | IA |
| JAEGER MFG CO | DES MOINES | IA |
| JOHN DEERE COMPANY | DES MOINES | IA |
| JOHN DEERE DES MOINES | DES MOINES | IA |
| JOHN DEERE WORKS | DES MOINES | IA |
| L & L INSULATION COMPANY | DES MOINES | IA |
| L. H. KURTZ CO. | DES MOINES | IA |
| Lake Shore Tire & Rubber Company | Des Moines | IA |
| LAKE SHORE TIRE AND RUBBER CO | DES MOINES | IA |
| Linde Air Products Co. (Union Carbide & Carbon Corp.) | Des Moines | IA |
| Lutheran Hospital | Des Moines | IA |
| MARQUETTE CEMENT CO. | DES MOINES | IA |
| MARQUETTE CEMENT MANUFACTURING. CO. | DES MOINES | IA |
| Marquette Cement Mfg. Co. | Des Moines | IA |
| Maytag | Des Moines | IA |
| MC GUINESS C H & CO | DES MOINES | IA |
| MEREDITH PRINTING, INC. | DES MOINES | IA |
| MEREDITH PUBLISHING PLANT | DES MOINES | IA |
| MIDAMERICAN ENERGY CO | DES MOINES | IA |
| NATIONAL STARCH CO. | DES MOINES | IA |
| NORTHWESTERN BELL TELEPHONE CO. | DES MOINES | IA |
| PITTS DES MOINES STEEL CO | DES MOINES | IA |
| POWER STATION NO. 2 | DES MOINES | IA |
| R R DONNELLY AND SONS CO | DES MOINES | IA |
| R. M. DALY & CO. | DES MOINES | IA |
| Sheetmetal Workers Union-local 45 | Des Moines | IA |
| SINCLAIR REFINING | DES MOINES | IA |
| STATE OF IOWA CAPITAL COMMISSION | DES MOINES | IA |
| SWIFT & CO. | DES MOINES | IA |
| SWIFT & COMPANY SOYBEAN MILL | DES MOINES | IA |
| SWIFT EDIBLE OIL CO | DES MOINES | IA |
| TITAN TIRE CORP | DES MOINES | IA |
| TITAN WHEEL INTERNATIONAL | DES MOINES | IA |
| UNIVERSITY AVENUE SUPPLY | DES MOINES | IA |
| VA Hospital | Des Moines | IA |
| VETERANS ADMINISTRATION HOSPITAL | DES MOINES | IA |
| VYLACTOS LABORATORIES | DES MOINES | IA |
| WALDINGER CORP | DES MOINES | IA |
| WEST DES MOINES HIGH SCHOOL | DES MOINES | IA |
| Yonker Bldg. | Des Moines | IA |
| Mercy Hospital | DES MOINES | IA |
| VETERANS A. HOSPITAL | DES MONIES | IA |
| IOWA MUTUAL INSURANCE | DEWITT | IA |
| Interstate Power Co | DUBUQUE | IA |
| A.Y. MCDONALD MFG. CO | DUBUQUE | IA |
| ALLIANT POWER CO | DUBUQUE | IA |
| ALLIED CHEMICAL | DUBUQUE | IA |
| BOARD OF EDUCATION | DUBUQUE | IA |
| BRUNSWICK BALKE COLLENDER CO. | DUBUQUE | IA |
| CARADCO CORP | DUBUQUE | IA |
| CARDACO, INC | DUBUQUE | IA |
| CARR RYDER AND ADAMS CO. | DUBUQUE | IA |
| CARR, ADAMS AND COLLIER CO. | DUBUQUE | IA |
| CENTRAL CATHOLIC HIGH SCHOOL | DUBUQUE | IA |
| CORN BELT PACKING CO. | DUBUQUE | IA |
| DUBUQUE STEAM SUPPLY CO | DUBUQUE | IA |
| DUBUQUE STONE PRODUCTS | DUBUQUE | IA |
| DUBUQUE STOVE PRODUCTS | DUBUQUE | IA |
| FARLEY AND LOETSCHER MANUFACTURING. CO. | DUBUQUE | IA |
| FINLEY HOSPITAL | DUBUQUE | IA |
| FISHER ARTIFICIAL ICE AND COLD STORAGE CO | DUBUQUE | IA |
| INTERSTATE PIPE & SUPPLY CO. | DUBUQUE | IA |
| INTERSTATE POWER CO | DUBUQUE | IA |
| INTERSTATE POWER COMPANY | DUBUQUE | IA |
| J. DEERE TRACTOR | DUBUQUE | IA |
| JELD WEN INC | DUBUQUE | IA |
| JOHN DEERE | DUBUQUE | IA |
| JOHN DEERE DUBUQUE TRACTOR | DUBUQUE | IA |
| John Deere Dubuque Works | Dubuque | IA |
| JOHN DEERE POWER PLANT | DUBUQUE | IA |
| JOHN DEERE WORKS | DUBUQUE | IA |
| JONES AS TERMINAL STS | DUBUQUE | IA |
| MAIZWOOD PRODUCTS CO | DUBUQUE | IA |
| MC DONALD MFG CO A Y | DUBUQUE | IA |
| POWERHOUSE | DUBUQUE | IA |
| SINCLAIR REFINING CO. | DUBUQUE | IA |
| SISTERS OF SAINT FRANCIS XAVIER HOSPITAL | DUBUQUE | IA |
| SISTERS OF ST. FRANCIS | DUBUQUE | IA |
| SISTERS OF ST. FRANCIS OF DUBUQUE | DUBUQUE | IA |
| THERMOLYNE CORPORATION | DUBUQUE | IA |
| UNION ELECTRIC CO | DUBUQUE | IA |
| VIRGINIA CAROLINA CHEMICAL CO | DUBUQUE | IA |
| WASHINGTON JUNIOR HIGH SCHOOL | DUBUQUE | IA |
| XAVIER HOSPITAL | DUBUQUE | IA |
| Ay McDonald Manufacturing Company | DUBUQUE | IA |
| AG PROCESSING INC | EAGLE GROVE | IA |
| IOWA PUBLIC SERVICE CO | EAGLE GROVE | IA |
| Alcoa (F/K/A Reynolds Metals) | East Davenport | IA |
| CARGILL NICK LOUDERBACK | EDDYVILLE | IA |
| CARGILL, INC. | EDDYVILLE | IA |
| CARGILL-EDDYVILLE CORN MILLING | EDDYVILLE | IA |
| Eddyville Powerhouse | Eddyville | IA |
| IOWA SOUTHERN UTILITIES CO. | EDDYVILLE | IA |
| IOWA RIVER LIGHT AND POWER CO. | ELDORA | IA |
| NATURAL GAS PIPE LINE CO. OF AMERICA | EMERSON | IA |
| NATURAL GAS PIPELINE CO. OF AMERICA | EMERSON | IA |
| MASON CITY CLEAR LAKE RAILWAY CO. | EMERY | IA |
| PEOPLES GAS AND ELECTRIC CO. | EMERY | IA |
| WIGDAHL BROTHERS HARDWARE | EMMETSBURG | IA |
| FAIRFIELD ALUMINUM CAST | FAIRFIELD | IA |
| IOWA MALLEABLE IRON CO | FAIRFIELD | IA |
| ROCKWELL STD CORP | FAIRFIELD | IA |
| GEORGIA PACIFIC CORPORATION | FORD DODGE | IA |
| B. C. BUNN – MUNICIPAL LIGHT PLANT | FOREST CITY | IA |
| MUNICIPAL LIGHT PLANT | FOREST CITY | IA |
| APCO OIL CORPORATION | FORT DODGE | IA |
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