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PRODUCERS |
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| 4-H OPERATING CORPORATION | 518 17TH ST STE 640 | DENVER | CO | 80202 | (303)534-3232 |
| ACEITE ENERGY CORP | 11150 HURON ST STE 210 | NORTHGLENN | CO | 80234 | (303)861-1748 |
| ADVANTAGE RESOURCES INC | 1775 SHERMAN ST STE 1700 | DENVER | CO | 80203 | (303) 831-1912 |
| AEON ENERGY CORP | 7551 W ALAMEDA AVE STE 402 | LAKEWOOD | CO | 80226 | (303)922-0590 |
| ALAMOSA DRILLING INC | P O BOX 644 6687 MALOUFF RD | ALAMOSA | CO | 81101 | (719) 589-3957 |
| ALAN HOWARD KARCHMER LIVING TRUST | 2851 S VALLEY VIEW #1199 | LAS VEGAS | NV | 89102 | (702) 221-9273 |
| AMERICAN PETROLEUM ENERGY CO | 5944 LUTHER LANE SUITE 900 | DALLAS | TX | 75225 | (214) 691-3676 |
| ANADARKO E&P COMPANY LP | P O BOX 1330 | HOUSTON | TX | 77251 | (832)636-3130 |
| ANDRIKOPOULOS RESOURCES* A G | P O BOX 788 | CHEYENNE | WY | 82003-0788 | (307) 634-4441 |
| ANTELOPE ENERGY COMPANY LLC | P O BOX 577 | KIMBALL | NE | 69145 | (308)235-4661 |
| ANTERO RESOURCES CORPORATION | 1625 17TH ST STE 300 | DENVER | CO | 80202 | (303)357-7310 |
| APACHE CORPORATION | 210 N AUBURN AVE | FARMINGTON | NM | 87401-8412 | (505)325-0318 |
| ARGALI EXPLORATION COMPANY | 138 PINYON CIR | RANGELY | CO | 81648 | (970) 675-8257 |
| ARGONEX COMPANY LLC | 2275 QUAIL DR | LAKEWOOD | CO | 80215 | (303)237-1424 |
| ARIES OPERATING LLC | 1221 MCKINNEY STE 3100 | HOUSTON | TX | 77010 | (713)759-1981 |
| ARK TRUST | 8163 E 131 RD | WETUMKA | OK | 74883-6227 | (405)379-2600 |
| ARMOR PETROLEUM INC | P O BOX 4625 | WICHITA FALLS | TX | 76308 | (940)692-5001 |
| ASPEN OPERATING LLC | 2040 W HAMILTON PL | SHERIDAN | CO | 80110 | (303)761-4770 |
| AUSMUS & CLARK OIL | 34809 ROAD 17 | HOLLY | CO | 81047 | (719)336-7278 |
| AVALON OIL COMPANY | 10 TOWN PLAZA STE 315 | DURANGO | CO | 81301 | (970)259-8954 |
| AVALON OIL COMPANY | 10 TOWN PLAZA STE 315 | DURANGO | CO | 81301 | (970)259-8954 |
| B P ENERGY INC | 4530 S VERBENA STE 381 | DENVER | CO | 80237 | (303)843-0973 |
| BABCOCK & BROWN ENERGY INC | 1512 LARIMER ST STE 550 | DENVER | CO | 80202 | (303)460-1132 |
| BANEY WELL SERVICE INC | 1629 YORK STREET #202 | DENVER | CO | 80206 | (303)996-6761 |
| BARNES PETROLEUM CORPORATION | 4356 RICKOVER DR | DALLAS | TX | 75244 | (972)385-7468 |
| BARRETT CORPORATION* BILL | 1099 18TH ST STE 2300 | DENVER | CO | 80202 | (303)293-9100 |
| BARRETT RESOURCES CORP | 1515 ARAPAHOE ST 'TOWER 3 SUITE 1000 | DENVER | CO | 80202 | (303) 572-3900 |
| BASIC EARTH SCIENCE SYSTEMS IN | 8547 E ARAPAHOE RD J-464 | GREENWOOD | CO | 80112 | (303) 294-9525 |
| BATES* JAMES EDWARD | P O BOX 796 | BRIGHTON | CO | 80601 | (303)521-3959 |
| BAYLESS PRODUCER LLC* ROBERT L | 621 17TH ST STE 2300 | DENVER | CO | 80293 | (303)296-9900 |
| BEARTOOTH OIL & GAS COMPANY | P O BOX 398 | FRUITA | CO | 81521-0398 | (970)858-4158 |
| BECCA OIL LLC | P O BOX 1347 | CUSHING | OK | 74023 | (918)225-2334 |
| BEEMAN* ROBT & LEO | P O BOX 788 | MOAB | UT | 84532 | (970) 259-1195 |
| BEREN CORPORATION | P O BOX 20380 | WICHITA | KS | 67208 | (316)265-3311 |
| BERENERGY CORP | 1700 BROAWAY STE 660 | DENVER | CO | 80290 | (303)295-2323 |
| BEREXCO INC | P O BOX 20380 | WICHITA | KS | 67208 | (316)265-3311 |
| BERRY ENERGY INC*WALTER BERRY | 1019 EIGHT ST STE 300 | GOLDEN | CO | 80401 | (303)279-0190 |
| BERRY PETROLEUM COMPANY | 950 17TH ST STE 2400 | DENVER | CO | 80202 | (303)825-3344 |
| BIG RUN PRODUCTION COMPANY | 318 WEST RUSK | TYLER | TX | 75701 | (903) 595-2990 |
| BISON ENERGY CORPORATION | P O BOX 3234 | LITTLETON | CO | 80161 | (303)470-8067 |
| BLACK HILLS EXPLORATION AND PRODUCTION INC | 350 INDIANA ST STE 400 | GOLDEN | CO | 80401 | (720)210-1300 |
| BLACK HILLS PLATEAU PRODUCTION LLC | 350 INDIANA ST STE 400 | GOLDEN | CO | 80401 | (720)210-1300 |
| BLACK RESOURCES inc | 320 MUSTANG TRAIL | GRANBURY | TX | 76049 | (817) 279-1144 |
| BLUE & GRAY ENERGY INC | 10304 STONEFLOWER DR | PARKER | CO | 80134 | (303)840-0186 |
| BLUE CHIP OIL INC | 155 E BOARDWALK DR STE 400 | FORT COLLINS | CO | 80525 | (970)493-6456 |
| BLUEBELL OIL CO | 3350 CTY RD SUITE 102 | RANGELY | CO | 81648 | (801) 789-898 |
| BONANZA CREEK OPERATING COMPANY LLC | P O BOX 21974 | BAKERSFIELD | CA | 93390 | (661)638-2730 |
| BOOCO'S CONTRACT SERVICES INC | P O BOX 572 | HAYDEN | CO | 81639 | (970) 276-3887 |
| BOPCO LP | 201 MAIN ST STE 3100 | FT WORTH | TX | 79102 | (817)390-8400 |
| BP AMERICA PRODUCTION COMPANY | 501 WESTLAKE PARK BLVD | HOUSTON | TX | 77079 | (970)247-6800 |
| BRIGHT & COMPANY | 4228 N CENTRAL EXPRESSWAY | DALLAS | TX | 75206-6534 | (214)559-9200 |
| BROWN INC* TOM | 555 17TH ST STE 1850 | DENVER | CO | 80202 | (303)260-5000 |
| BROWN OIL & GAS LLC | 10481 COUNTY ROAD 20.5 | STERLING | CO | 80751 | (970) 522-1072 |
| BTU ENERGY | 418 SCHOOL ST | RANGELY | CO | 81648 | (970)675-8068 |
| BUEHLER* HOWARD D & VIRGINIA A | 10001 W COUNTY 2E | BERTHOUD | CO | 80513 | (970) 532-2313 |
| BURLINGTON RESOURCES OIL & GAS LP | 3401 E 30TH ST | FARMINGTON | NM | 87402 | (505)326-9842 |
| BURR OIL AND GAS INC | P O BOX 50 | FARMINGTON | NM | 87499 | (505)325-1701 |
| BYRON OIL INDUSTRIES INC | 154 CLARKSON EXECUTIVE PARK | BALLWIN | MO | 63011 | (636)391-8770 |
| C & J FIELD SERVICES | 3650 COUNTY RD #2 | RANGELY | CO | 81648 | (970)675-2485 |
| CABOT OIL & GAS CORPORATION | 600 17TH ST STE 900N | DENVER | CO | 80202 | (303)226-9400 |
| CALCO DBA CALLISTER CO | 2005 300 WEST | SALT LAKE CITY | UT | 84115 | (801) 487-4721 |
| CANNON* B G DBA CANNON OIL | BOX 333 | HAYDEN | CO | 81639 | (970)276-3312 |
| CDM OIL & GAS | 950 S CHERRY ST STE 1100 | DENVER | CO | 80222 | (303)759-5123 |
| CDX GAS LLC | 5485 BELTLINE RD STE 190 | DALLAS | TX | 75254 | (972)382-1881 |
| CEDAR RIDGE LLC | 484 TURNER DR BLDG B STE 3 | DURANGO | CO | 81303 | (970)382-5990 |
| CENTRAL OPERATING INC | 1600 BROADWAY STE 1050 | DENVER | CO | 80202 | (303)894-9576 |
| CFG ENERGY INC | 3932 WEST 18TH STREET LN | GREELEY | CO | 80634 | (970) 330-2660 |
| CGT INC | 2439 ATWOOD ST | LONGMONT | CO | 80501 | (720)494-1592 |
| CHACO ENERGY COMPANY | P O BOX 1587 | DENVER | CO | 80201 | (303)744-1480 |
| CHANDLER CREEK COMPANIES | P O BOX 370286 | DENVER | CO | 80237 | (303) 770-3951 |
| CHANDLER DJ BASIN LLC | 12303 AIRPORT WAY STE #130 | BROOMFIELD | CO | 80021 | (303)404-9605 |
| CHANDLER ENERGY LLC | 475 17TH ST STE 1210 | DENVER | CO | 80202 | (303)297-2028 |
| CHEMCO INC | 558 CASTLE PINES PKWY UTB4#402 | CASTLE ROCK | CO | 80104 | (303)771-7777 |
| CHESAPEAKE OPERATING INC | P O BOX 18496 | OKLAHOMA CITY | OK | 73154-0496 | (405)848-8000 |
| CHEVRON MIDCONTINENT LP | 11111 S WILCREST | HOUSTON | TX | 77099 | (281)561-4927 |
| CHEVRON U S A INC | 6001 BOLLINGER CANYON RD | SAN RAMON | CA | 94583 | (281)582-5304 |
| CHOLLA PRODUCTION LLC | 7851 S ELATI ST STE 201 | LITTLETON | CO | 80120 | (303)623-4565 |
| CHURCHILL ENERGY INC | 777 S WADSWORTH BLVD | LAKEWOOD | CO | 80226 | (303) 989-7765 |
| CIMARRON OPERATING INC | 24165 IH-10 WEST #217-413 | SAN ANTONIO | TX | 78257 | (210)325-1355 |
| CINNAMON CREEK OIL & GAS INC | P O BOX 544 | WALSH | CO | 81090 | (719) 324-5538 |
| CITATION OIL & GAS CORP | 8223 WILLOW PLACE SOUTH | HOUSTON | TX | 77070 | (281)517-7800 |
| CITY AND COUNTY OF DENVER | 8500 PENA BLVD RM 9870 | DENVER | CO | 80249 | (303)342-2537 |
| CLAYTON WILLIAMS ENERGY INC | 6 DESTA DR STE 3000 | MIDLAND | TX | 79705 | (432)682-6324 |
| COASTAL PLAINS ENERGY INC | 420 THROCKMORTON STE 630 | FT WORTH | TX | 76102-3723 | (817)882-9055 |
| COASTLINE OPERATING LLC | 3100 TIMMONS STE 520 | HOUSTON | TX | 77027 | (713)960-1677 |
| COLEMAN OIL & GAS INC | P O DRAWER 3337 | FARMINGTON | NM | 87499 | (505)327-0356 |
| COLORADO ENERGY MINERALS INC | P O BOX 899 | DENVER | CO | 80201-0899 | (303)293-8198 |
| COLORADO INTERSTATE GAS CO | P O BOX 1087 | COLORADO SPRINGS | CO | 80944 | (719)667-7739 |
| COLTON LIMITED LIABILITY CO | 621 17TH ST SUITE 1320 | DENVER | CO | 80293 | (303) 298-1567 |
| COMBINED RESOURCES CORP | P O BOX 6118 | EDMOND | OK | 73083-6118 | (405)341-7700 |
| COMET RIDGE USA INC | 600 17TH ST STE 600S | DENVER | CO | 80202-5402 | (303)357-4646 |
| CONOCO PHILLIPS COMPANY | P O BOX 2197 WL3 4066 | HOUSTON | TX | 77252 | (832)486-2329 |
| CONQUEST OIL COMPANY | 8203 W 20TH ST STE A | GREELEY | CO | 80634 | (970)356-5560 |
| CORAL PRODUCTION CORP | 1600 STOUT ST STE 1500 | DENVER | CO | 80202 | (303)623-3573 |
| CREDO PETROLEUM CORP | 1801 BROADWAY SUITE 900 | DENVER | CO | 80202 | (303) 297-2200 |
| CRIMSON EXPLORATION OPERATING INC | 480 N SAM HOUSTON PKWY EAST STE 300 | HOUSTON | TX | 77060 | (281)260-8388 |
| CRUMLEY* JACK | 27577 COUNTY ROAD 42 P O BOX 494 | AKRON | CO | 80720-494 | (970) 345-6550 |
| CURTON CAPITAL CORP | P O BOX 796 | VERNAL | UT | 84078 | (435)789-2672 |
| CUTLER BROTHERS | 12635 BUCKLEY RD | BRIGHTON | CO | 80601 | (303) 659-4469 |
| D & D RESOURCES INC | 2835 VILLA WAY STE 4 | GRAND JUNCTION | CO | 81501 | (970) 243-7320 |
| D & G ROUSTABOUT SERVICE | 765 S 1/2 ROAD | MACK | CO | 81525 | (970)858-1581 |
| DAVIS LLC* EDWARD MIKE | 730 17TH ST STE 450 | DENVER | CO | 80202 | (720)946-6700 |
| DAVIS PETROLEUM CORP | 555 17TH ST STE 1400 | DENVER | CO | 80202 | (303)623-1000 |
| DECLAR OIL & GAS INC | P O BOX 1455 | FORT MORGAN | CO | 80701 | (970) 867-6697 |
| DELTA PETROLEUM CORPORATION | 370 17TH ST STE 4300 | DENVER | CO | 80202 | (303)293-9133 |
| DEVON ENERGY PRODUCTION COMPANY LP | 20 N BROADWAY STE 1500 | OKLAHOMA CITY | OK | 73102-8260 | (405) 235-3611 |
| DIAMOND OIL & GAS INC | 119 FOOTHILL DR | VACAVILLE | CA | 95688 | (707)451-2256 |
| DIAMOND OPERATING INC | 6680 GUNPARK DR STE 100 | BOULDER | CO | 80301 | (303)494-4420 |
| DIAMONDBACK OIL PARTNERS LLP | 5990 KIPLING PKWY STE 201 | ARVADA | CO | 80004-4993 | (303)432-0025 |
| DIVERSIFIED OPERATING CORPORATION | 15000 W 6TH AVE STE 102 | GOLDEN | CO | 80401 | (303)384-9611 |
| DOLPHIN ENERGY CORPORATION | 1331 17TH ST STE 1050 | DENVER | CO | 80202 | (303)293-2300 |
| DONNELLY CASING PULLING CO | BOX 791 | STERLING | CO | 80751 | (970) 522-1410 |
| DOUD OIL & GAS COMPANY LLC | 25528 GENESEE TRAIL ROAD | GOLDEN | CO | 80401 | (303)462-3604 |
| DRY CREEK PETROLEUM LLC | P O BOX 44278 | DENVER | CO | 80201 | (303)663-2615 |
| DUGAN PRODUCTION CORP | P O BOX 420 | FARMINGTON | NM | 87499-0420 | (505) 325-1821 |
| DUKE GAS COMPANY | 22500 COUNTY RD 24 | VERNON | CO | 80755 | (970) 332-5610 |
| DUNNE EQUITIES OPERATING INC | 8100 E 22ND STREET N #1100 | WICHITA | KS | 67226-2311 | (316)684-6508 |
| EAGLE OPERATING INC | P O BOX 853 | KENMARE | ND | 58746 | (701) 385-4244 |
| EAST RESOURCES INC | 301 BRUSH CREEK RD | WARRENDALE | PA | 15086 | (724)772-8600 |
| EDDY OIL COMPANY | 1875 S MARSHALL CIR | LAKEWOOD | CO | 80232 | (303)934-2955 |
| EDDY* HAROLD E & FLORENCE L | 153 SUNDANCE DR | GRAND JUNCTION | CO | 81503 | (970) 241-3874 |
| EL PASO E & P COMPANY LP | 1001 LOUISIANA ST | HOUSTON | TX | 77002 | (713)420-2131 |
| EL PASO ENERGY RATON COPORATION | P O BOX 190 | RATON | NM | 87740 | (505) 445-6726 |
| EL PASO PRODUCTION OIL & GAS COMPANY | 1001 LOUISIANA ST | HOUSTON | TX | 77002 | (713)420-2600 |
| ELLORA OPERATING LP | 5480 VALMONT RD STE 350 | BOULDER | CO | 80301 | (303)444-8881 |
| ELM RIDGE EXPLORATION CO LLC | 12225 GREENVILLE AVE STE 950 | DALLAS | TX | 95243 | (972) 889-2100 |
| ENCANA OIL & GAS (USA) INC | 370 17TH ST STE 1700 | DENVER | CO | 80202-5632 | (303)389-5060 |
| ENERGY ALLIANCE COMPANY INC | 300 N MAIN STE 309 | WICHITA | KS | 67202 | (316)267-0155 |
| ENERGY INVESTMENT PARTNERS LLC | P O BOX 225878 | DALLAS | TX | 75222 | (214)978-2500 |
| ENERGY OIL AND GAS INC | P O BOX 910 | NIWOT | CO | 80544 | (303)442-6390 |
| ENERGY OPERATIONS COLORADO LP | 4600 S SYRACUSE 9TH FLR | DENVER | CO | 80237 | (877)928-6800 |
| ENERGY SEARCH COMPANY | 650 S CHERRY ST STE 1011 | DENVER | CO | 80246 | (303)320-6546 |
| ENERVEST OPERATING LLC | 1001 FANNIN ST STE 800 | HOUSTON | TX | 77002 | (713)495-6530 |
| ENPROP INC | 9137 E MINERAL CIRCLE STE. 100 | CENTENNIAL | CO | 80112 | (303)833-5650 |
| EOG RESOURCES INC | 600 17TH ST STE 1100N | DENVER | CO | 80202 | (303) 572-9000 |
| ERG RESOURCES LLC | 600 TRAVIS STE 7050 | HOUSTON | TX | 77001 | (713)812-1800 |
| EVERGREEN OPERATING CORPORATION | 1401 17TH ST STE 1200 | DENVER | CO | 80202 | (303)298-1147 |
| EXCO RESOURCES INC | 2829 ROAD 111 | SIDNEY | NE | 69162 | (308)254-4825 |
| EXXON MOBIL _OIL_ CORPORATION | P O BOX 4358 WGR RM 310 | HOUSTON | TX | 77210-4358 | (281)654-1927 |
| EXXON MOBIL CORPORATION | P O BOX 4358 | HOUSTON | TX | 77210-4358 | (713)431-1125 |
| FAHEY OIL & GAS | P O BOX 122 | STRASBURG | CO | 80136 | (303) 622-9499 |
| FANCHER OIL LLC | 1801 BROADWAY STE 720 | DENVER | CO | 80202 | (303) 296-6600 |
| FAULCONER INC* VERNON E | P O BOX 7995 | TYLER | TX | 75711 | (903) 581-4382 |
| FEES JR AND SON OIL & GAS* WALTER S | 2516 FORESIGHT CIRCLE RM #10 | GRAND JUNCTION | CO | 81501 | (970)242-2044 |
| FIDELITY EXPLORATION & PRODUCTION COMPANY | 1700 LINCOLN ST STE 2800 | DENVER | CO | 80203 | (303)893-3133 |
| FLOW PRODUCTION COMPANY | 6420C N SANTA FE AVE | OKLAHOMA CITY | OK | 73116 | (405)840-2552 |
| FLYING J OIL & GAS INC | P O DRAWER 130 | ROOSEVELT | UT | 84066 | (435)722-5169 |
| FORTITUDE EXPLORATION CO | P O BOX 5417 | NAVARRE | FL | 32566 | (580)939-6966 |
| FOUNDATION ENERGY MANAGEMENT LLC | 5220 SPRING VALLEY RD STE 212 | DALLAS | TX | 75254 | (972)934-8385 |
| FOUNTAINHEAD RESOURCES LTD | P O BOX 641 | LITTLETON | CO | 80160-0641 | (303)488-9983 |
| FOUR STAR OIL & GAS COMPANY | 11111 S WILCREST DR | HOUSTON | TX | 77099 | (281)561-4896 |
| FRITZ & DIGMAN | 826 E NAVAJO | FARMINGTON | NM | 87401 | (505) 325-3478 |
| FRITZLER RESOURCES INC | P O BOX 114 | FORT MORGAN | CO | 80701 | (970) 867-9388 |
| GENESIS GAS & OIL LLC | 106 W 14TH ST 7TH FLR | KANSAS CITY | KS | 64105 | (816)222-7500 |
| GENESSEE OIL INC | P O BOX 608 | CASTLE ROCK | CO | 80104 | (303) 694-7200 |
| GEOMET OPERATING COMPANY INC | 5336 STADIUM TRACE PKWY #206 | BIRMINGHAM | AL | 35244 | (205)425-3855 |
| GEOTECH PRODUCTION INC | 7844 S ESPANA WAY | AURORA | CO | 80016-1918 | (303)690-O921 |
| GILBERT-STEWART OPERATING LLC | 1801 BROADWAY STE 450 | DENVER | CO | 80202 | (303) 534-1686 |
| GILS HOT OIL SERVICE | P O BOX 145 | BYERS | CO | 80103 | (303) 622-9751 |
| GORDON ENGINEERING INC | P O BOX 3525 | GRAND JUNCTION | CO | 81502 | (970) 245-1958 |
| GOSNEY & SONS INC | P O BOX 367 | BAYFIELD | CO | 81122 | (970) 884-9533 |
| GRAND MESA OPERATING CO | 200 EAST FIRST ST STE 307 | WICHITA | KS | 67202 | (316)265-3000 |
| GRAND VALLEY RESOURCES INC | P O BOX 39 | RANGELY | CO | 81648 | (970)675-2639 |
| GRAYHORSE OPERATING INC | 20 EAST 5TH ST STE 320 | TULSA | OK | 74103 | (918) 382-9201 |
| GREAT WESTERN OIL & GAS CO LLC | 252 CLAYTON ST 4TH FLR | DENVER | CO | 80206 | (303)393-0033 |
| GRIFFIN MANAGEMENT LLC | P O BOX 670 | BYERS | CO | 80103 | (720)490-5648 |
| GRYNBERG* JACK J | 5299 DTC BLVD STE 500 | GREENWOOD VILLAGE | CO | 80111-3326 | (303)850-7490 |
| GSL ENERGY CORPORATION | 1875 LAWRENCE ST STE 1400 | DENVER | CO | 80202 | (303)572-8900 |
| GUNNISON ENERGY CORPORATION | 1601 FORUM PL STE 1400 | WEST PALM BEACH | FL | 33401 | (561)697-4300 |
| H & M PETROLEUM CORPORATION | 731 N WEBER ST STE 200 | COLORADO SPRINGS | CO | 80903 | (719)590-6060 |
| H & R WELL SERVICES INC | 17509 ROAD 14 | FORT MORGAN | CO | 80701 | (970) 867-9007 |
| HAINES* RICHARD | P O BOX 114 | EVANS | CO | 80620 | (303) 339-5956 |
| HALCYON EXPLORATION COMPANY LLC | 1580 LINCOLN ST STE 630 | DENVER | CO | 80203-3510 | (303)832-1555 |
| HALDE OIL INC | P O BOX 234 | CHEYENNE WELLS | CO | 80810 | (719) 767-5729 |
| HAUG* WANDA | 5 CRESTWOOD DRIVE | KIMBALLL | NE | 69145 | (308) 235-4342 |
| HIGHLINE OPERATING LLC | P O BOX 20057 | TUSCALOOSA | AL | 35402 | (205)752-3339 |
| HILCORP ENERGY COMPANY | P O BOX 61229 | HOUSTON | TX | 77208 | (713)209-2400 |
| HOLCOMB OIL & GAS INC | P O BOX 2058 | FARMINGTON | NM | 87499 | (505)326-0550 |
| HOLMES EXPLORATION INC | P O BOX 3105 | TULSA | OK | 74101 | (918)583-1396 |
| HOMESTEAD OIL INC | 16880 WILD PLUM CIRCLE | MORRISON | CO | 80465 | (303) 697-772 |
| HOUSTON EXPLORATION COMPANY* THE | 1100 LOUISIANA STE 2000 | HOUSTON | TX | 77002 | (713)830-6800 |
| HRBEK* RANDALL L | ROUTE 1 BOX 11 | MERINO | CO | 80741 | (303) 522-4115 |
| HRM RESOURCES LLC | P O BOX 608 | CASTLE ROCK | CO | 80104 | (303)694-7200 |
| HUBBS FAMILY TRUST* TED R | 7994 E SADDLEBACK DR | KINGMAN | AZ | 86401 | (520) 692-6208 |
| HUBER CORPORATION* J M | 1050 17TH ST STE 700 | DENVER | CO | 80265 | (303)825-7900 |
| HUNTER ENERGY LLC | 8000 S CHESTER ST STE 375 | CENTENNIAL | CO | 80112 | (303)480-0880 |
| HUNTINGTON ENERGY LLC | 908 NW 71ST | OKLAHOMA CITY | OK | 73116 | (405)840-9876 |
| HYNDREX RESOURCES | 300 E 16TH ST STE 201 | GREELEY | CO | 80631 | (970)336-8830 |
| INDUSTRIAL GAS SERVICES INC | 4891 INDEPENDENCE ST STE 200 | WHEATRIDGE | CO | 80033 | (303) 422-3400 |
| INFINITY OIL & GAS OF WYOMING INC | 633 17TH ST STE 1800 | DENVER | CO | 80202 | (720)932-7800 |
| JACO INC* TROY | P O BOX 1476 | SHERMAN | TX | 75091 | (903)868-2703 |
| JAVERNICK OIL | 3040 E MAIN | CANON CITY | CO | 81212 | (719) 275-3040 |
| JAVERNICK* JULIA K | 3040 E MAIN | CANON CITY | CO | 81212 | (719)275-6439 |
| JETTA OPERATING COMPANY INC | 777 TAYLOR ST STE PI-D | FT WORTH | TX | 76102 | (817) 335-1179 |
| JFH OIL & GAS LLC | P.O. BOX 967 | STRASBURG | CO | 80136 | (303)622-9499 |
| JL OIL COMPANY | 3992 ROAD Y5 | WELDONA | CO | 80653 | (303) 645-2367 |
| JOHNSON INC* DEA | 10583 VAN GORDON WAY | WESTMINSTER | CO | 80021 | (303)438-9600 |
| JON DRINDAK | 8858 COUNTY RD #2 | RANGELY | CO | 81648 | (970) 675-2108 |
| JOURNEY OPERATING LLC. | 1201 LOUISIANA STE 1040 | HOUSTON | TX | 77002 | (713) 655-0595 |
| JULANDER ENERGY COMPANY | 7887 E BELLEVIEW AVE STE 1275 | ENGLEWOOD | CO | 80111 | (303)831-7800 |
| JUSTIN ENERGY LLC | 1776 LINCOLN ST STE 1300 | DENVER | CO | 80203 | (303)830-0998 |
| J-W OPERATING COMPANY | 7074 S REVERE PKWY | CENTENNIAL | CO | 80112 | (303)422-4990 |
| K C RESOURCES INC | P O BOX 1118 | CARDIFF | CA | 92007 | (760)753-4337 |
| K P KAUFFMAN COMPANY INC | 1675 BROADWAY STE 2800 | DENVER | CO | 80202 | (303)825-4822 |
| KAISER-FRANCIS OIL COMPANY | P O BOX 21468 | TULSA | OK | 74121 | (915)491-4694 |
| KCS RESOURCES INC | 5555 SAN FELIPE STE 1200 | HOUSTON | TX | 77056 | (713)877-8006 |
| KENNEC TRUSTEE* FRANK | 3130 TEMPLETON GAP RD | COLORADO SPGS | CO | 80907 | (719) 632-8271 |
| KERR-MCGEE OIL & GAS ONSHORE LP | 1999 BROADWAY STE 3700 | DENVER | CO | 80202 | (303) 296-3600 |
| KESTREL RESOURCES INC | 2602 MCKINNEY AVE STE 400 | DALLAS | TX | 75204 | (214)871-0999 |
| KGH OPERATING COMPANY | P O BOX 2235 | BILLINGS | MT | 59103-2235 | (406) 259-8480 |
| KILO ENERGY GROUP LLC | 117 LANDMARK SQ | VIRGINIA BEACH | VA | 23452 | (757)321-6936 |
| KINDER MORGAN CO2 COMPANY LP | P O BOX 281304 | LAKEWOOD | CO | 80228-8304 | (303)989-1740 |
| KINDER MORGAN RETAIL ENERGY SERVICES COMPANY | 370 VAN GORDON ST | LAKEWOOD | CO | 80228-8304 | (303)914-7975 |
| KISSLER* DANIEL | 22956 E MINERAL PL | AURORA | CO | 80016 | (720)269-4779 |
| KLABZUBA OIL & GAS INC | 930 WEST 1ST ST 4TH FLR | FT WORTH | TX | 76102 | (817)336-5757 |
| KOCH EXPLORATION COMPANY LLC | 9777 PYRAMID CT STE 210 | ENGLEWOOD | CO | 80112 | (303)325-2560 |
| KODIAK PETROLEUM INC | P O BOX 4677 | ENGLEWOOD | CO | 80155 | (303)790-7550 |
| KUGLER DBA D-J OIL COMPANY* DEAN L | P O BOX 72 | NEW RAYMER | CO | 80742 | (970) 437-5460 |
| KYKON OIL & GAS INC | P O BOX 1197 | BILLINGS | MT | 59103 | (406)248-3757 |
| L & B OIL COMPANY(LESLIE & BETTY SESSIONS) | BOX 182 | MERINO | CO | 80741 | (970) 522-7175 |
| LABARON* ROBERT G | 1525 N 1ST STREET | GRAND JUNCTION | CO | 81501 | (970)242-5200 |
| LAMAR OIL & GAS EXPLORATION | P O BOX 246 | WILEY | CO | 81092 | (719)829-4350 |
| LANCE OIL & GAS COMPANY INC | 1099 18TH ST STE 1200 | DENVER | CO | 80202-1964 | (303) 452-5603 |
| LARAMIE ENERGY INC | 1512 LARIMER ST STE 1000 | DENVER | CO | 80202 | (303)339-4400 |
| LINN BROS OIL & GAS INC. | P O BOX 416 | FRUITA | CO | 81521-416 | (303) 858-7386 |
| LOCIN OIL CORPORATION | 25231 GROGAN'S MILL RD STE 500 | THE WOODLANDS | TX | 77380 | (281)362-8600 |
| LOEB SOLE PROPRIETOR* HERMAN | P O BOX 524 | LAWRENCEVILLE | IL | 62439 | (618) 943-2227 |
| LONE MOUNTAIN PRODUCTION CO | P O BOX 80965 | BILLINGS | MT | 59108-0965 | (406)245-5077 |
| LONE PINE GAS INC | 6704 E LONG AVE | ENGLEWOOD | CO | 80112 | (303)770-4258 |
| LORENTZ OIL & GAS LLC | 3501 FRENCH PARK DR | EDMOND | OK | 73034 | (405)844-3750 |
| LUDWICK* JAMES L | P O BOX 70 | FARMINGTON | NM | 87499 | (505) 325-1079 |
| LUNDVALL OIL & GAS | P O BOX 632 | GREELEY | CO | 80632 | (970)339-8730 |
| LYSTER OIL CO | 701 COUNTY ROAD 105 | CRAIG | CO | 81625 | (970) 824-3536 |
| LYSTER* BRANDON L. | 19522 COUNTY ROAD 17 | CRAIG | CO | 81625 | (970)826-0170 |
| M E III CORPORATION | 14182 W 4TH AVE | GOLDEN | CO | 80401-521 | (303) 279-4429 |
| MACHII-ROSS PETROLEUM CO | 2901 28TH ST STE 205 | SANTA MONICA | CA | 90405 | (310)450-5666 |
| MAGPIE OPERATING INC | 2707 SOUTH COUNTY RD 11 | LOVELAND | CO | 80537 | (970)669-6308 |
| MALLON OIL COMPANY | 350 INDIANA ST STE 400 | GOLDEN | CO | 80401 | (720)210-1300 |
| MANZANO LLC | P O BOX 2107 | ROSWELL | NM | 88202 | (505)623-1996 |
| MARALEX RESOURCES INC | P O BOX 338 | IGNACIO | CO | 81137 | (970) 563-4000 |
| MARKUS PRODUCTION | 621 17TH ST STE 1710 | DENVER | CO | 80293 | (303) 295-6910 |
| MARTY BROTHERS | 8834 EAST 96TH AVE | HENDERSON | CO | 80640 | (303) 288-645 |
| MASTORAKOS* D A | P O BOX 1086 | NOVATO | CA | 94948 | (415)897-8881 |
| MATRIX ENERGY LLC | P O BOX 3160 | DURANGO | CO | 81301 | (970)247-1959 |
| MATRIX PRODUCTION COMPANY | 5725 COMMONWEALTH BLVD | SUGAR LAND | TX | 77479 | (281)265-1212 |
| MCCARTNEY ENGINEERING LLC | 4251 KIPLING ST STE 575 | WHEAT RIDGE | CO | 80033 | (303) 830-7208 |
| MCELVAIN OIL & GAS PROPERTIES | 1050 17TH ST STE 1800 | DENVER | CO | 80265 | (303)893-0933 |
| MCKENZIE JUNCTION MA LLC | 1000 ALPINE STE 100 | BOULDER | CO | 80304 | (303)442-2150 |
| MCLANE TRUST* DIXIE | P O BOX 420 | FARMINGTON | NM | 87499-0420 | (972)999-4607 |
| MCRAE & HENRY LTD | 1600 STOUT ST STE 580 | DENVER | CO | 80202 | (303) 623-5999 |
| MCWHINNEY HOLDING COMPANY LLLP | 2725 ROCKY MOUNTAIN AVE #200 | LOVELAND | CO | 80538 | (970)962-9990 |
| MERIT ENERGY COMPANY | 13727 NOEL ROAD STE 500 | DALLAS | TX | 75240 | (972)701-8377 |
| MERRION OIL & GAS CORP | 610 REILLY AVENUE | FARMINGTON | NM | 87401 | (505) 327-9801 |
| MESMER DBA CONTINENTAL ENERGY SERVICE* DAVID L | 20055 ROAD 17 | FORT MORGAN | CO | 80701 | (970)867-9342 |
| MF ENERGY LLC | 2580 UNIVERSITY AVE | GREEN BAY | WI | 54311 | (920)468-4000 |
| MONAGO OPERATING INC | 1951 MONTVIEW DR | GREELEY | CO | 80631 | (970)356-0878 |
| MONAHAN GAS & OIL INC | 1951 MONTVIEW DR | GREELEY | CO | 80631 | (970)356-0878 |
| MONAHAN* REX | P O BOX 1231 | STERLING | CO | 80751 | (970)522-0774 |
| MONT ROUGE INC | 1011 S VALENTIA ST #16 | DENVER | CO | 80247-6813 | (303)369-1780 |
| MONUMENT GAS MARKETING INC | P O BOX 950 | MONUMENT | CO | 80132-0950 | (719) 481-8029 |
| MOUNTAIN PETROLEUM CORP | 1801 BROADWAY STE 1250 | DENVER | CO | 80202 | (303)296-1500 |
| MULL DRILLING COMPANY INC | P O BOX 2758 | WICHITA | KS | 67201-2758 | (316)264-6366 |
| MURCHISON OIL & GAS INC | 1100 MIRA VISTA BLVD | PLANO | TX | 75093-4698 | (972)931-0701 |
| MURFIN DRILLING COMPANY INC | 250 N WATER ST STE 300 | WICHITA | KS | 67202 | (316)267-3241 |
| NANCE PETROLEUM CORPORATION | 550 N 31ST ST STE 500 | BILLINGS | MT | 59101 | (406)245-6248 |
| NATIONAL FUEL CORPORATION | 7979 E TUFTS AVE PKWY | DENVER | CO | 80237-2843 | (303)220-7772 |
| NIELSON & ASSOCIATES INC | P O BOX 2850 | CODY | WY | 82414 | (307) 587-2445 |
| NIOBRARA ILLUMINATING GAS ASSOCIATES LLC | 8310 S VALLEY HWY 3RD FLR | ENGLEWOOD | CO | 80112 | (303)524-1178 |
| NOBLE ENERGY INC | 100 GLENBOROUGH STE 100 | HOUSTON | TX | 77067 | (281)876-6105 |
| NOBLE ENERGY PRODUCTION INC | 1625 BROADWAY STE 2000 | DENVER | CO | 80202 | (303)389-3600 |
| NONSUCH NATURAL GAS INC | 5621 STRAND BLVD STE 211 | NAPELS | FL | 34110 | (239)598-9999 |
| NORSTAR PETROLEUM INC | 5 INVERNESS DRIVE EAST STE 120 | ENGLEWOOD | CO | 80112 | (303)925-0696 |
| NORTH FINN LLC | 950 STAFFORD | CASPER | WY | 82609 | (307) 237-7854 |
| NORTHERN MICHIGAN OIL & GAS CORPORATION | P O BOX 225365 | DALLAS | TX | 75222 | (214)941-0711 |
| NORTHLAND ROYALTY OPERATING CO | 3030 FOURTH AVENUE NORTH | BILLINGS | MT | 59101 | (406) 259-5400 |
| NORTHSTAR GAS COMPANY INC | 14504 BRIAR FOREST DR #1114 | HOUSTON | TX | 77077 | (281)493-5532 |
| O'BRIEN ENERGY RESOURCES CORP | 75 CONGRESS ST STE 103 | PORTSMOUTH | NH | 3801-2499 | (603) 427-2099 |
| OILFIELD OPERATING COMPANY | P O BOX 1564 | CUSHING | OK | 74023 | (918) 225-2334 |
| OKT RESOURCES LLC | 1900 E 15TH BLDG 600 | EDMOND | OK | 73013 | (405)285-1140 |
| ONEOK RESOURCES COMPANY | P O BOX 871 | TULSA | OK | 74103-4298 | (918) 588-7700 |
| ORR ENERGY LLC | 826 9TH ST #200 | GREELEY | CO | 80631 | (970)351-8777 |
| ORR PRODUCTION CORP | P O BOX 7663 | MIDLAND | TX | 79708 | (915) 694-8228 |
| OVERLAND RESOURCES LTD | 10807 CEDAR BROOK ST | HIGHLANDS RANCH | CO | 80126 | (303)346-2572 |
| OXBOW PROPERTIES INC | 7433 S CLARKSON CIR | CENTENNIAL | CO | 80122-1422 | (303)798-2264 |
| OXY USA INC | 5 GREENWAY PLAZA STE 110 | HOUSTON | TX | 77046 | (713)215-7000 |
| OXY USA WTP LP | P O BOX 27757 | HOUSTON | TX | 77046 | (713)215-7232 |
| P & M PETROLEUM MANAGEMENT LLC | 518 17TH ST STE 400 | DENVER | CO | 80202 | (303) 260-7129 |
| PABLO OPERATING COMPANY | 777 MAIN ST STE 3250 | FT WORTH | TX | 76102 | (817)332-1328 |
| PADCO LLC | P O BOX 5275 | BEVERLY HILLS | CA | 90209-5275 | (310) 276-3154 |
| PALADIN ENERGY PARTNERS LLC | 410 17TH ST STE 1200 | DENVER | CO | 80202 | (303)893-6621 |
| PAPE OILFIELD SERVICE INC | P O BOX 66 | BENNETT | CO | 80102 | (307)472-5257 |
| PARK ENERGY PETROLEUM LLC | P O BOX 825 | WALDEN | CO | 80480 | (307)871-2007 |
| PEACOCK EXPLORATION LLC | 1100 NE LOOP 410 STE 724 | SAN ANTONIO | TX | 78209 | (210)824-1471 |
| PELICAN HILL OIL & GAS INC | 1401 N EL CAMINO REAL STE 207 | SAN CLEMENTE | CA | 92672 | (949)498-2101 |
| PETERSON ENERGY OPERATING INC | 1805 MORNING DRIVE | LOVELAND | CO | 80538 | (970) 669-7411 |
| PETRA OLEUM CORP | P O BOX 2148 | MIDLAND | TX | 79702 | (432) 687-1033 |
| PETRO MEX RESOURCES | P O BOX 6724 | FARMINGTON | NM | 87499 | (505)632-5948 |
| PETRO-CANADA RESOURCES (USA) INC | 1099 18TH ST STE 400 | DENVER | CO | 80202 | (303)297-2300 |
| PETROCORP INCORPORATED | P O BOX 702500 | TULSA | OK | 74170 | (918)493-7700 |
| PETROGLYPH ENERGY INC | 555 S COLE RD | BOISE | ID | 83707 | (208)685-7600 |
| PETROGULF CORPORATION | 518 17TH ST STE 1455 | DENVER | CO | 80202 | (303) 893-5400 |
| PETROLEUM DEVELOPMENT CORP | 103 E MAIN ST | BRIDGEPORT | WV | 26330 | (304)842-6256 |
| PETROLEUM ENERGY CORP | 90 SILVER FOX DR | GREENWOOD VILLAGE | CO | 80121 | (303)741-9504 |
| PETROLEUM MANAGEMENT LLC | 20203 HIGHWAY 60 | PLATTEVILLE | CO | 80651 | (970)737-1090 |
| PETRON DEVELOPMENT COMPANY | 1899 W LITTLETON BLVD | LITTLETON | CO | 80120 | (303) 794-5300 |
| PETROX RESOURCES INC | 39868 HIGHWAY 13 | MEEKER | CO | 81641 | (970) 878-5594 |
| PICEANCE OPERATING COMPANY LLC | 950 17TH ST STE 2400 | DENVER | CO | 80202 | (303)825-3344 |
| PILAND RESOURCES | 43651 E 38TH AVE | BENNETT | CO | 80102 | (303) 644-6435 |
| PINTAIL PETROLEUM LTD | 225 N. MARKET #300 | WICHITA | KS | 67202 | (316) 263-2243 |
| PIONEER NATURAL RESOURCES USA INC | 1401 17TH ST STE 1200 | DENVER | CO | 80202 | (303)298-8100 |
| PONCHO PRODUCTION CO | HC 2 BOX 14 | KEYES | OK | 73947 | (580)696-2883 |
| PRECISIONEERING INC | 190 JASMINE ST | DENVER | CO | 80220 | (303) 355-1542 |
| PREMIUM OIL CO | 2005 SOUTH 300 WEST | SALT LAKE CITY | UT | 84115 | (801)487-4721 |
| PRESCO INC | 10200 GROGAN'S MILL RD | THE WOODLANDS | TX | 77380 | (281)292-7792 |
| PRIME OPERATING COMPANY | 9821 KATY FREEWAY STE 1050 | HOUSTON | TX | 77042 | (713)735-0000 |
| PRODUCTION MANAGEMENT INC | 5000 BUTTE ST #107 | BOULDER | CO | 80301 | (303)449-0557 |
| PUCKETT ENERGY CO | 5460 S QUEBEC ST SUITE 250 | GREENWOOD VLG | CO | 80111-191 | (303) 773-1094 |
| PUCKETT-WARREN OIL CO | 1899 W LITTLETON BLVD | LITTLETON | CO | 80120 | (303) 794-5300 |
| QUANTUM RESOURCES MANAGEMENT LLC | 1775 SHERMAN ST STE 1525 | DENVER | CO | 80203 | (303)861-1170 |
| QUESTAR EXPLORATION AND PRODUCTION COMPANY | 1050 17TH ST STE 500 | DENVER | CO | 80265 | (303)672-6957 |
| RDT PROPERTIES INC | 2431 E 61ST ST STE 850 | TULSA | OK | 74136 | (918)743-2360 |
| RED MOUNTAIN ENERGY LLC | 1050 17TH ST STE 1660 | DENVER | CO | 80265 | (970)563-0145 |
| RED RIVER RANCH HOLDINGS LLC | 1251 AVENUE OF THE AMERICAS 17TH FLR | NEW YORK | NY | 10020 | (212)782-7078 |
| RED WILLOW PRODUCTION CO | P O BOX 642 | IGNACIO | CO | 81137 | (970)563-0145 |
| RED WILLOW PRODUCTION LLC | P O BOX 737 | IGNACIO | CO | 81137 | (970)563-0145 |
| REDWINE RESOURCES INC | 8214 WESTCHESTER STE 740 | DALLAS | TX | 75225 | (214)691-5800 |
| RENEGADE OIL & GAS COMPANY LLC | P O BOX 460413 | AURORA | CO | 80046-0413 | (303) 680-4725 |
| REYNOLDS* NOEL | BOX 356 | FLORA VISTA | NM | 87415 | (505)334-3760 |
| RIATA ENERGY INC | 1601 NW EXPRESSWAY STE 1600 | OKLAHOMA CITY | OK | 73118 | (405)753-5500 |
| RICHARDS/BELNAP INTERESTS INC | P O BOX 52852 | LAFAYETTE | LA | 75050-285 | (318) 233-2004 |
| RICHARDSON OPERATING COMPANY | 5600 S QUEBEC ST STE 130-B | GREENWOOD VILLAGE | CO | 80111 | (303) 830-8000 |
| RIM OPERATING INC. | 5 INVERNESS DRIVE EAST | ENGLEWOOD | CO | 80112 | (303) 799-9828 |
| RIO MESA RESOURCES INC | 226 1/2 E MAIN ST | RANGELY | CO | 81648 | (970)675-8491 |
| RITCHIE EXPLORATION INC | P O BOX 783188 | WICHITA | KS | 67278-318 | (316) 691-9500 |
| RIVIERA DRILLING & EXPL CO | 1441 N MAYFAIR RD | MILWAUKEE | WI | 53226-3253 | (414) 771-1600 |
| ROCKIES OIL & GAS INC | 871 GREELEY AVE | JOHNSTOWN | CO | 80534 | (970) 587-5078 |
| ROSETTA RESOURCES OPERATING LP | 717 TEXAS STE 2800 | HOUSTON | TX | NULL | (713)335-4000 |
| ROSEWOOD RESOURCES INC | 2711 N HASKEL AVE #2800 LB22 | DALLAS | TX | 75204-2944 | (214)756-6618 |
| RUTH* ULA PEARL | 120 N DEVINE RD | VANCOUVER | WA | 98661 | (360)695-9502 |
| RWL ENTERPRISES INC | P O BOX 2312 | BAKERSFIELD | CA | 93303 | (661)589-4144 |
| S & S OIL & GAS OPERATING | 107 N 4TH STE 209 | PONCA CITY | OK | 74601 | (580)765-8010 |
| SAMOTLOR PETROLEUM INVESTMENTS LLC | 2603 OAK LAWN AVE STE 300 | DALLAS | TX | 75219 | (888)645-1925 |
| SAMSON RESOURCES COMPANY | TWO WEST SECOND ST | TULSA | OK | 74103 | (918) 583-1791 |
| SAN MARCO PETROLEUM INC | 240 MILWAUKEE ST STE 1000 | DENVER | CO | 80206-500 | (303) 321-100 |
| SAND HILLS SOCIETY | 8310 S VALLEY HWY 3RD FLR | ENGLEWOOD | CO | 80112 | (303)524-1178 |
| SANDLIN OIL CORP | 621 17TH ST SUITE 2055 | DENVER | CO | 80293 | (303) 292-3313 |
| SCHMID PROPERTIES INC | PO BOX 389 | HICO | TX | 76457 | (254)796-2100 |
| SCHNEIDER ENERGY SERVICES INC | P O BOX 297 | FORT MORGAN | CO | 80701 | (970)867-9437 |
| SCHREIDER & COMPANY INC | 240 W JESSUP ST | BRIGHTON | CO | 80601 | (303) 659-8203 |
| SCHUTZ* HAROLD | P O BOX 5 | CHROMO | CO | 81128 | (970) 264-5883 |
| SETEX OIL & GAS COMPANY | 480 N SAM HOUSTON PKWY E #300 | HOUSTON | TX | 77060 | (281)260-8388 |
| SG INTERESTS I LTD | P O BOX 2677 | DURANGO | CO | 81302 | (970)259-2701 |
| SHAHAN & SONS | P O BOX 36 | CHROMO | CO | 81128 | (970) 264-2416 |
| SHAWNEE OIL DEVELOPMENT CO INC | P O BOX 300 | KEVIN | MT | 59454 | (406)873-5277 |
| SHELBY RESOURCES LLC | 5893 SADDLE CREEK TRAIL | PARKER | CO | 80134 | (303)840-2183 |
| SIMMONS INC.* D. J. | 1009 RIDGEWAY PL STE 200 | FARMINGTON | NM | 87401 | (505)326-3753 |
| SKAER PROPERTIES LTD PARTNERSHIP | 3054 S COUNTY ROAD 13 | LOVELAND | CO | 80537 | (970) 962-9992 |
| SLATE RIVER RESOURCES LLC | 418 MAIN ST STE 18 | VERNAL | UT | 84078 | (435)781-1870 |
| SMITH ENERGY CORP | 1640 37TH AVE | GREELEY | CO | 80634 | (970)330-7034 |
| SMITH ENERGY LIMITED PARTNERSHIP 1988 | 600 GREENTREE LN | ADA | MI | 49301 | (616)682-0004 |
| SMITH OIL PROPERTIES INC | 518 17TH ST STE 360 | DENVER | CO | 80202-4104 | (303)825-7405 |
| SONTERRA ENERGY LLC | P O BOX 17103 | WICHITA | KS | 67217 | (316)262-4800 |
| SOPER PRODUCTION | P O BOX 190 | KIMBALL | NE | 69145-0190 | (308)235-3533 |
| SOUTH OIL INC | 5868 WESTHEIMER STE 485 | HOUSTON | TX | 77057 | (713)784-1113 |
| SOVEREIGN ENERGY LLC | 621 17TH ST STE 1520 | DENVER | CO | 80293 | (303)297-0347 |
| ST CROIX OPERATING INC | P O BOX 13799 | DENVER | CO | 80201 | (303)534-4597 |
| ST. JAMES ENERGY OPERATING INC | 11177 EAGLE VIEW DR STE 1 | SANDY | UT | 84092 | (801)576-1154 |
| STANDLEY DBA OTIS ENERGY* ROBT. K | 327 S VINE ST | OTIS | CO | 80743-9296 | (970) 246-3439 |
| STAR ACQUISITION VIII LLC | 1099 18TH ST STE 600 | DENVER | CO | 80202 | (303)296-1434 |
| STARLIGHT CORPORATION | 1520 WEST CANAL CT STE 130 | LITTLETON | CO | 80120 | (720)922-3119 |
| STARLIGHT RESOURCES LLC | 1520 WEST CANAL CT STE 130 | LITTLETON | CO | 80128 | (720)922-3119 |
| STEHLE OIL COMPANY | P O BOX 1577 | CRAIG | CO | 81626 | (303) 824-6909 |
| STELBAR OIL CORP INC | 155 NORTH MARKET STE 500 | WICHITA | KS | 67202 | (316)264-8378 |
| STEPHENS ENERGY COMPANY LLC | 1825 LAWRENCE ST STE 300 | DENVER | CO | 80202 | (303)296-2012 |
| STEPHENS* JAMES R | 3604 SAN BAR LANE | COLLEYVILLE | TX | 70634 | (817) 485-4040 |
| STERLING ENERGY COMPANY | 1200 17TH ST STE 1000 | DENVER | CO | 80202 | (720)946-6105 |
| STRACHAN EXPLORATION INC | 383 INVERNESS DR SOUTH STE 360 | ENGLEWOOD | CO | 80116 | (303)785-7006 |
| SUMMIT OPERATING LLC | P O BOX 683909 | PARK CITY | UT | 84068 | (435)940-9001 |
| SUNDANCE RESOURCES. INC. | 4925 N O'CONNOR RD STE 101 | IRVING | TX | 75062-2760 | (214) 741-1900 |
| SURE OIL COMPANY | 136 S MAIN ST STE 712 | SALT LAKE CITY | UT | 84101 | (801)328-9452 |
| TARPON OIL COMPANY | P O BOX 471009 | FT WORTH | TX | 76147 | (817)740-0678 |
| TATONKA OIL AND GAS COMPANY INC | 1515 ARAPAHOE ST TOWER 1 10TH FLR | DENVER | CO | 80202 | (303)476-4100 |
| TAYLOR* ROSE JUNE | 6769 MT LENEVE DR | SAN JOSE | CA | 95120 | (408)997-9131 |
| TERRA EXPLORATION & PRODUCTION COMPANY | 1250 E 23RD ST 2ND FLR | SIGNAL HILL | CA | 90806 | (562)427-3633 |
| TEXAKOMA OPERATING LP | 5400 LBJ FREEWAY STE 500 | DALLAS | TX | 75240 | (972)701-9106 |
| TEXAS AMERICAN RESOURCES COMPANY | 410 17TH STREET SUITE 1610 | DENVER | CO | 80202 | (720)279-6805 |
| TEXAS TEA LLC | 601 16TH C344 | GOLDEN | CO | 80401 | (303)216-1262 |
| TEXON OIL & GAS CO. LLC | 965 S FULTON AVE | FT LUPTON | CO | 80621 | (303)857-6045 |
| THOMAS L SPRING LLC | 7400 E ORCHARD RD STE 2000 | GREENWOOD VILLAGE | CO | 80111 | (303) 771-1889 |
| THOMAS OPERATING COMPANY INC | 2102 45TH AVENUE CT | GREELEY | CO | 80634 | (970) 353-2861 |
| THOMPSON & JAMES CLEO THOMPSON JR & J CLEO | 325 N SAINT PAUL STE 4300 | DALLAS | TX | 75201-3993 | (214)953-1177 |
| TIGGES OIL LLC | 12406 WCR 64 1/2 | GREELEY | CO | 80631 | (970)686-2836 |
| TIMBERLINE ENERGY INC | 415 S 5TH ST | LARAMIE | WY | 82070 | (307)755-9000 |
| TIMKA RESOURCES LTD | 2116 SE 14TH ST | LOVELAND | CO | 80537 | (970) 667-9861 |
| TINDALL OPERATING COMPANY | 12741 E CALEY STE 142 | ENGLEWOOD | CO | 80111 | (303) 850-7272 |
| TIPPERARY OIL & GAS CORP | 10111 RICHMOND AVE STE 500 | HOUSTON | TX | 77042 | (713)986-1749 |
| TOM FENNO PRODUCTION LLC | 1707 AVIAN DR | FORT COLLINS | CO | 80525 | (970) 221-4100 |
| TOP OPERATING COMPANY | 10881 ASBURY AVE STE 230 | LAKEWOOD | CO | 80227 | (303)727-9915 |
| TRUE OIL LLC | P O BOX 2360 | CASPER | WY | 82601 | (307) 237-9301 |
| TUDEX PETROLEUM INC | 2929 15 ST NE | CALGARY | AB | T2E 7L8 | (403)291-5146 |
| TWIN ARROW INC | 1520 WEST CANAL CT STE 130 | LITTLETON | CO | 80128 | (720)922-3119 |
| TYLER ROCKIES EXPLORATION LTD | BOX 119 | TYLER | TX | 75710 | (903)595-4886 |
| UMAD LLC | 9430 NEWTON ST | WESTMINSTER | CO | 80031 | (303)427-5154 |
| UNIOIL | P O BOX 310 | EVANS | CO | 80620 | (970) 330-6300 |
| UNION OIL CO OF CALIFORNIA | P O BOX 760 | MOAB | UT | 84532 | (435)686-7676 |
| UNITED STATES EXPLORATION INC | 1500 POLY DR STE 100 | BILLINGS | MT | 59102 | (406)294-5990 |
| VESSELS COAL GAS INC | 730 17TH ST | DENVER | CO | 80202 | (303)534-0488 |
| VISTA OPERATING INC | 61 MCMURRAY RD STE 300 | PITTSBURGH | PA | 15241 | (412)833-8884 |
| VISUAL OPTICS INC | 1410 SOUTH 7TH AVE P O BOX 950 | STERLING | CO | 80751 | (970) 522-1832 |
| WALKER OIL & GAS CO LLC* KEITH F | 219 STANLEY | ARDMORE | OK | 73402 | (580) 223-1575 |
| WALKING A GRAZING ASSN | 31451 COUNTY RD V | ECKLEY | CO | 80727 | (970) 359-2234 |
| WALLACE OIL & GAS INC | 3535 NW 58TH ST STE 940 | OKLAHOMA CITY | OK | 73112 | (405) 948-1100 |
| WALSH PRODUCTION INC | P O BOX 30 | STERLING | CO | 80751 | (970) 522-1839 |
| WARD & SON* AL | P O BOX 737 | OGALLALLA | NE | 69153 | (308) 284-8350 |
| WELLINGTON OPERATING COMPANY | 6065 S QUEBEC ST STE 201 | ENGLEWOOD | CO | 80111 | (303)220-5399 |
| WESCO OPERATING INC | P O BOX 1706 | CASPER | WY | 82602 | (307)472-4618 |
| WESTERN GAS RESOURCES INC | 1099 18TH ST STE 1200 | DENVER | CO | 80202 | (303) 452-5603 |
| WESTERN GAS RESOURCES-SAND WASH INC | 1099 18TH ST STE 1200 | DENVER | CO | 80202 | (303)452-5603 |
| WESTERN INTERIOR ENERGY INC. | P O BOX 247 | CRESTED BUTTE | CO | 81224 | (970)349-5883 |
| WESTERN OIL & GAS DEVELOPMENT | P O BOX 470 | ROBINSON | IL | 62454 | * |
| WESTERN OPERATING COMPANY | 518 17TH ST STE 1680 | DENVER | CO | 80202 | (303)893-2438 |
| WESTGATE OIL CO | P O BOX 782228 | WICHITA | KS | 67278-222 | (316) 685-5908 |
| WESTPORT OIL & GAS COMPANY LP | 1999 BROADWAY STE 3700 | DENVER | CO | 80202 | (303)296-3600 |
| WEXPRO COMPANY | P O BOX 45601 | SALT LAKE CITY | UT | 84145-0601 | (801)324-2834 |
| WHITEWING RESOURCES LLC | 518 17TH ST STE 250 | DENVER | CO | 80202 | (303)623-0809 |
| WHITING OIL AND GAS CORPORATION | 1700 BROADWAY STE 2300 | DENVER | CO | 80290 | (303)837-1661 |
| WIEPKING-FULLERTON ENERGY LLC | 4600 S DOWNING ST | ENGLEWOOD | CO | 80110 | (303)789-1798 |
| WILLIAMS PRODUCTION COMPANY LLC | P O BOX 3102 MS-37-4 | TULSA | OK | 74101 | (800)945-5426 |
| WILLIAMS PRODUCTION RMT COMPANY | 1515 ARAPAHOE ST STE 1000 | DENVER | CO | 80202 | (303) 572-3900 |
| WILLIAMS* ROBERT G | 20151 COUNTY ROAD 22 | HUGO | CO | 80821 | (719) 446-5252 |
| WILLIFORD ENERGY COMPANY | 6100 S YALE AVE STE 2000 | TULSA | OK | 74136 | (918)493-2300 |
| WILLIFORD RESOURCES LLC | 6506 S LEWIS AVE STE 102 | TULSA | OK | 74136 | (918) 493-2300 |
| WINDSOR ENERGY GROUP LLC | 14313 N MAY AVE STE 100 | OKLAHOMA CITY | OK | 73134 | (405)848-8807 |
| WINSLOW RESOURCES INC | 2840 BERRY LANE | GOLDEN | CO | 80401 | (303) 279-1629 |
| WISE* WAYNE L | P O BOX 5116 | ENGLEWOOD | CO | 80155 | (303) 741-3396 |
| WOLCOTT* DEAN E | 5890 COUNTY RD 38 | MANCOS | CO | 81328 | * |
| WOLD OIL PROPERTIES INC | 139 W SECOND ST STE 200 | CASPER | WY | 82601 | (307) 265-7252 |
| WOLFE* GEORGE H | P O BOX 231 | PENROSE | CO | 81240 | (719)547-1160 |
| WRIGHT* ROBERT L | P O BOX 1196 | CORTEZ | CO | 81321 | (970)565-8349 |
| WYMAN *LOUIS M | P O BOX 278 | CRAIG | CO | 81626 | (303) 824-6431 |
| WYOMING PACIFIC ENERGY LLC | 3020 OLD RANCH PKWY STE 300 | SEAL BEACH | CA | 90740 | (562)799-5722 |
| XOG OPERATING LLC | P O BOX 352 | MIDLAND | TX | 79702 | (432)683-3171 |
| XTO ENERGY INC | 382 RD 3100 | AZTEC | NM | 87410 | (505)333-3100 |
| YATES PETROLEUM CORPORATION | 105 SOUTH 4TH ST | ARTESIA | NM | 88210 | (505) 748-1471 |
| YOUNG GAS STORAGE COMPANY LTD | P O BOX 1087 | COLORADO SPGS | CO | 80944 | (719) 473-2300 |
some names and addresses may be inactive
* Not available at this time