MEMORANDUM. Development of Comprehensive Orphan Wells and Orphaned Sites List as Directed by Executive Order D

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MEMORANDUM To: From: Subject: Governor s Office Julie Murphy, COGCC Director Development of Comprehensive Orphan Wells and Orphaned Sites List as Directed by Executive Order D 2018-12 Date: August 1, 2018 Background Governor Hickenlooper signed Executive Order D 2018-12 on July 18, 2018 to improve the environment, public health, and safety of Coloradans by directing the Colorado Oil and Gas Conservation Commission (COGCC) to plug, remediate, and reclaim orphaned wells and sites and prevent future orphaned wells and sites. The Executive Order requires COGCC to update its comprehensive list of orphaned wells and sites by August 1, 2018, and to prioritize the list into low-, medium-, and high-priority categories based on identified risk factors. COGCC s initial prioritized list is enclosed. Methodology COGCC staff analysis resulted in a final total of 263 orphaned wells and 365 associated orphaned sites as of August 1, 2018. This list was prioritized into low-, medium-, and high-priority categories based on risk factors, including population density and urbanization, environmental factors, years in service, active spills, stormwater issues, noxious weeds, wildlife/livestock/vegetation impacts, surface equipment, bradenhead pressure, mechanical integrity test data, and history of venting or leaking. Each site received a numerical score between 0 and 100. Sites scoring between 0 and 44 are classified as low-priority, between 45 and 64 as medium-priority and between 65 and 100 as high-priority. Of the 365 orphaned sites, 79 or 22% are classified as low-priority, 223 or 61% as medium-priority and 63 or 17% as high priority. Conclusion As required by the Executive Order, COGCC will provide an annual report of progress on plugging, remediation, and reclamation of orphaned wells and orphaned sites for the preceding year (July 1, 2017 through June 30, 2018) by September 1, 2018. The report will be made available to the public, and presented to the Governor and General Assembly committees of reference with oversight authority over the COGCC.

1 306944 SPATTER* NICK - 81448 2 306986 RED MESA 3 307036 RED MESA 4 311530 COLORADO EXPL AND DRLG - 18597 5 312130 RED MOUNTAIN RESOURCES LLC - 10374 6 312131 RED MOUNTAIN RESOURCES LLC - 10374 7 312132 RED MOUNTAIN RESOURCES LLC - 10374 8 312133 RED MOUNTAIN RESOURCES LLC - 10374 9 312148 BENCHMARK 10 312151 BENCHMARK 11 312152 BENCHMARK 12 312154 BENCHMARK 13 312155 BENCHMARK 14 312157 BENCHMARK 15 312158 BENCHMARK 16 312159 BENCHMARK 17 312160 BENCHMARK 18 312161 BENCHMARK 19 312162 BENCHMARK 20 312163 BENCHMARK 21 312164 BENCHMARK 22 312166 BENCHMARK 23 312167 BENCHMARK 24 312168 BENCHMARK 1 Planned San Juan La Plata High 1 In Progress Denver-Julesburg El Paso Medium 1 Planned Denver-Julesburg Logan High 1 In Progress Denver-Julesburg Jefferson Medium 1 Planned Denver-Julesburg Logan High 0 In Progress Denver-Julesburg Logan High 1 In Progress Denver-Julesburg Logan Medium 1 Planned Denver-Julesburg Logan High 0 In Progress Denver-Julesburg Logan High 0 In Progress Denver-Julesburg Logan High 8/1/2018 1

25 312172 BENCHMARK 26 312173 BENCHMARK 27 312177 BENCHMARK 28 312179 BENCHMARK 29 312183 BENCHMARK 30 312184 BENCHMARK 31 312185 BENCHMARK 32 312190 BENCHMARK 33 312194 BENCHMARK 34 312195 BENCHMARK 35 312196 BENCHMARK 36 312197 BENCHMARK 37 312198 BENCHMARK 38 312199 BENCHMARK 39 312200 BENCHMARK 40 312201 CM PRODUCTION 41 312203 BENCHMARK 42 312204 BENCHMARK 43 312205 BENCHMARK 44 312207 BENCHMARK 45 312208 BENCHMARK 46 312210 BENCHMARK 47 312213 ARCO OIL & GAS COOMPANY - 3900 48 312216 HONDO OIL & GAS CO - 41600 1 Planned Denver-Julesburg Logan Low 0 In Progress Denver-Julesburg Logan High 0 In Progress Denver-Julesburg Logan High 8/1/2018 2

49 312261 RED MOUNTAIN RESOURCES LLC - 10374 50 312287 DONNELLY CASING PULLING CO - 24775 51 312287.99 DONNELLY CASING PULLING CO - 24775 52 312345 BENCHMARK 53 312346 BENCHMARK 54 312480 P & M PETROLEUM MANAGEMENT LLC - 66565 55 313221 JULANDER ENERGY COMPANY - 44204 56 313363 JULANDER ENERGY COMPANY - 44204 57 313424 MONUMENT 58 313426 MONUMENT 59 313427 MONUMENT 60 313428 MONUMENT 61 313429 MONUMENT 62 313430 MONUMENT 63 313431 MONUMENT 64 313442 MONUMENT 65 313444 MONUMENT 66 313445 MONUMENT 67 313447 MONUMENT 68 313448 MONUMENT 1 Planned Piceance Mesa Medium 1 Planned Sand Wash Moffat Medium 1 Planned Sand Wash Moffat Low 0 Planned Paradox Montezuma Low 1 Planned Paradox Montezuma Low 1 Planned Paradox Montezuma Low 1 Planned Paradox Montezuma Low 8/1/2018 3

69 313454 MONUMENT 70 313456 HUMISTON* G EVERETT - 41810 71 313483 ATOM PETROLEUM LLC - 10434 72 313519 MONUMENT 73 313554 MONUMENT 74 313628 ATOM PETROLEUM LLC - 10434 75 313641 REDWINE - 10107 0 In Progress Paradox Montezuma Medium 0 In Progress Paradox Montezuma Low 0 In Progress Paradox Montrose Medium 76 313989 1 1 Planned Paradox Ouray Medium 77 313992 HACKATHORN DRILLING CO - 100997 78 314338 CALIFORNIA OIL GROUP, LTD - 12950 79 314736 TOLES* JOHN R - 88580 80 314797 GLADE* CHRIS OIL & GAS LLC - 10378 81 314858 NORTHSTAR GAS 82 314874 GLADE* CHRIS OIL & GAS LLC - 10378 83 314902 NORTHSTAR GAS 84 315074 GLADE* CHRIS OIL & GAS LLC - 10378 85 315578 NORTHSTAR GAS 86 315631 NORTHSTAR GAS 87 315653 NORTHSTAR GAS 88 315680 NORTHSTAR GAS 89 316200 PETROHUNTER 90 316205 PETROHUNTER 91 316228 PETROHUNTER 92 316240 PETROHUNTER 1 Planned Paradox Ouray Medium 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco High 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco Low 1 Planned Piceance Rio Blanco Low 8/1/2018 4

93 316316 PETROHUNTER 94 316599 PETROHUNTER 95 316600 PETROHUNTER 96 316612 PETROHUNTER 97 316792 PINE RIDGE OIL & GAS LLC - 10276 98 316883 RICKER FARMS INC - 74546 99 317041 CM PRODUCTION 100 317043 CM PRODUCTION 101 317120 CM PRODUCTION 102 317183 103 317235 CM PRODUCTION 104 317255 CM PRODUCTION 105 317287 106 317288 107 317289 108 317310 P & M PETROLEUM MANAGEMENT LLC - 66565 109 317369 CM PRODUCTION 110 318231 TEXAS TEA OF 111 318452 TEXAS TEA OF 112 319655 RUTH* ULA PEARL - 90902 113 319667 114 319812 115 319813 0 Planned Sand Wash Routt Low 1 Planned Denver-Julesburg Sedgwick Medium 0 In Progress Denver-Julesburg Washington Low 1 In Progress Denver-Julesburg Washington High 1 Planned Denver-Julesburg Washington High 1 Planned Denver-Julesburg Washington Medium 1 Planned Denver-Julesburg Washington Medium 1 Planned Denver-Julesburg Washington Medium 1 In Progress Denver-Julesburg Washington Medium 1 In Progress Denver-Julesburg Washington Medium 1 In Progress Denver-Julesburg Washington Medium 1 Planned Denver-Julesburg Washington Medium 1 Planned Denver-Julesburg Washington Medium 1 In Progress Denver-Julesburg Adams High 1 In Progress Denver-Julesburg Weld High 1 In Progress Denver-Julesburg Adams Medium 1 Planned Denver-Julesburg Adams High 0 Planned Denver-Julesburg Adams Low 8/1/2018 5

116 319818 117 319856 118 319874 119 320126 TUDEX 90615 120 320129 TUDEX 90615 121 320139 TEXAS TEA OF 122 320140 TEXAS TEA OF 123 320206 TEXAS TEA OF 124 320217 TUDEX 90615 125 320223 TEXAS TEA OF 126 320240 TEXAS TEA OF 127 320257 TEXAS TEA OF 128 320267 129 320268 130 320319 BARNES PETROLEUM CORPORATION - 6420 131 320452 TUDEX 90615 132 320453 TUDEX 90615 133 320830 TEAGUE*LE - 85708 134 320840 WHEELER ENERGY COMPANY - 95964 135 321033 P & M PETROLEUM MANAGEMENT LLC - 66565 1 In Progress Denver-Julesburg Adams Medium 1 In Progress Denver-Julesburg Adams Medium 0 In Progress Denver-Julesburg Adams Medium 0 In Progress Denver-Julesburg Adams High 1 In Progress Denver-Julesburg Adams High 1 In Progress Denver-Julesburg Adams Medium 0 In Progress Denver-Julesburg Adams High 0 In Progress Denver-Julesburg Adams Medium 1 In Progress Denver-Julesburg Adams High 1 In Progress Denver-Julesburg Adams Medium 0 Planned San Juan Archuleta Low 0 Planned San Juan Archuleta Low 1 Planned Hugoton Embayment Baca Low 8/1/2018 6

136 321048 P & M PETROLEUM MANAGEMENT LLC - 66565 137 322283 DIAMOND OIL & GAS INC - 10067 138 322284 DIAMOND OIL & GAS INC - 10067 139 322285 DIAMOND OIL & GAS INC - 10067 140 322300 RANCHO TRES - 73372 141 322394 NORTHSTAR GAS 142 322478 NORTHSTAR GAS 143 322499 DIAMOND OIL & GAS INC - 10067 144 322500 DIAMOND OIL & GAS INC - 10067 145 322516 NORTHSTAR GAS 146 322535 DIAMOND OIL & GAS INC - 10067 147 324599 CM PRODUCTION 148 324600 CM PRODUCTION 149 324605 CM PRODUCTION 150 324623 CM PRODUCTION 151 324624 CM PRODUCTION 152 324626 CM PRODUCTION 153 324627 CM PRODUCTION 154 324628 CM PRODUCTION 155 324630 CM PRODUCTION 156 324632 CM PRODUCTION 157 324633 CM PRODUCTION 158 324634 CM PRODUCTION 159 324635 CM PRODUCTION 160 324637 CM PRODUCTION 161 324638 CM PRODUCTION 162 324640 CM PRODUCTION 163 324672 CM PRODUCTION 164 324775 PROVIDE 100900 165 325093 RED MESA 166 325110 RED MESA 1 Planned Hugoton Embayment Baca Medium 0 In Progress Piceance Garfield Low 0 In Progress Piceance Garfield Low 0 In Progress Piceance Garfield Medium 1 Planned Piceance Garfield Medium 1 Planned Piceance Garfield Medium 1 Planned Piceance Garfield Low 0 In Progress Piceance Garfield Low 0 In Progress Piceance Garfield Low 1 Planned Piceance Garfield Medium 0 In Progress Piceance Garfield Medium 1 In Progress North Park Jackson High 1 Planned North Park Jackson Low 1 Planned North Park Jackson Medium 1 In Progress North Park Jackson Medium 1 Planned North Park Jackson Medium 1 In Progress North Park Jackson Medium 1 Planned North Park Jackson Medium 1 Planned North Park Jackson Medium 1 In Progress North Park Jackson High 1 Planned North Park Jackson Medium 1 Planned North Park Jackson Low 3 In Progress North Park Jackson High 1 Planned North Park Jackson Low 1 Planned North Park Jackson Low 1 Planned North Park Jackson Low 1 In Progress North Park Jackson Medium 1 Planned North Park Jackson Low 0 In Progress Denver-Julesburg Jefferson Medium 0 Planned San Juan La Plata High 8/1/2018 7

167 325111 RED MESA 168 325120 TAYLOR* WILLIAM M - 10353 169 325121 RED MESA 170 325132 RED MESA 171 325134 RED MESA 172 325208 NORTHWEST PIPELINE CORP - 64650 173 325224 RED MESA 174 325230 RED MESA 175 325231 RED MESA 176 325247 RED MESA 177 325259 TRASK, CONCEPT & ASSOC - 89205 178 325267 RED MESA 179 325284 RED MESA 180 325286 RED MESA 181 325297 RED MESA 182 325302 RED MESA 183 325308 RED MESA 184 325313 RED MESA 185 325346 RED MESA 186 325352 RED MESA 187 325354 REYNOLDS* NOEL - 74500 188 325362 RED MESA 189 325376 RED MESA 190 325441 RED MESA 191 325450 RED MESA 1 In Progress San Juan La Plata High 1 Planned San Juan La Plata High 0 In Progress San Juan La Plata High 0 In Progress San Juan La Plata Medium 1 In Progress San Juan La Plata High 1 In Progress San Juan La Plata High 1 Planned San Juan La Plata High 8/1/2018 8

192 325506 RED MESA 193 325511 RED MESA 194 325520 RED MESA 195 325542 RED MESA 196 325573 RED MESA 197 325612 RED MESA 198 325628 RED MESA 199 325652 RED MESA 200 325653 ATOM PETROLEUM LLC - 10434 201 325667 RED MESA 202 325745 RED MESA 203 325858 RED MESA 204 326319 RED MESA 205 333070 206 333074 CM PRODUCTION 207 333794 RED MESA 208 333796 RED MESA 209 333797 RED MESA 210 333799 RED MESA 211 333934 HUDSON OIL & GAS CO - 41625 212 334030 RED MESA 213 334508 TERRA - 86300 214 335733 TUDEX 90615 215 335737 TUDEX 90615 1 Planned San Juan La Plata High 1 In Progress San Juan La Plata High 1 In Progress San Juan La Plata High 1 Planned San Juan La Plata High 2 Planned North Park Jackson Medium 2 Planned San Juan La Plata High 1 Planned San Juan La Plata High 1 Planned Piceance Mesa High 1 In Progress Denver-Julesburg Adams High 2 In Progress Denver-Julesburg Adams High 8/1/2018 9

216 336189 TUDEX 90615 217 336491 PETROHUNTER 218 336505 PETROHUNTER 219 375718 SUNDANCE OIL COMPANY - 84028 220 376264 STARLIGHT RESOURCES LLC - 81825 221 376893 STRATA PRODUCTION OPERATORS - 83154 222 376969 GOLDEN BEAR ENERGY INC - 36000 223 377694 PARKER & PARSLEY DEV L P - 67270 224 378515 HEFNER & CHRIST - 39166 225 378811 HORIZON OIL & GAS CO - 41150 226 378828 GETTY OIL COMPANY - 33888 227 378834 HORIZON OIL & GAS CO - 41150 228 378875 TROJAN OIL & GAS COMPANY - 90250 229 378878 HORIZON OIL & GAS CO - 41150 230 378893 FALCON SEABOARD DRLG CO - 28810 231 378902 WAKEFIELD DRILLING CO - 93820 232 381369 MINERALS ENGINEERING CO - 1001003 233 382128 HABCO, INC - 37000 234 382448 GEARY OIL CO - 33180 235 382573 PINE RIDGE OIL & GAS LLC - 10276 1 Planned Denver-Julesburg Weld Medium 0 Planned Denver-Julesburg Adams Medium 0 Planned Denver-Julesburg Adams Medium 0 Planned Denver-Julesburg Adams Medium 0 Planned Denver-Julesburg Arapahoe Low 1 Planned San Juan Archuleta Low 0 Planned Hugoton Embayment Baca Low 0 Planned Hugoton Embayment Baca Low 0 Planned Hugoton Embayment Baca Low 0 Planned Hugoton Embayment Baca Medium 0 Planned Hugoton Embayment Baca Low 0 In Progress Hugoton Embayment Baca Low 1 Planned Hugoton Embayment Baca Medium 1 Planned Piceance Delta Medium 0 Planned Denver-Julesburg Elbert Medium 1 Planned Canon City Embayment Fremont High 0 Planned Canon City Embayment Fremont Low 236 382714 1 1 Planned Piceance Garfield Low 237 384249 CIMARRON OIL & GAS CO INC - 17070 238 384363 CIMARRON OIL & GAS CO INC - 17070 239 384421 PLANET ASSOCIATES INC - 70600 240 384925 FIVE FIELDS OIL COMPANY* THE - 100659 241 385255 SUPRON ENERGY CORP - 85150 242 385262 OCEAN OIL COMPANY - 65025 243 385282 COMPASS EXPL INC - 19000 0 Planned Hugoton Embayment Kiowa Medium 0 Planned Hugoton Embayment Kiowa Medium 1 Planned Hugoton Embayment Kiowa Medium 1 Planned Hugoton Embayment Kit Carson Medium 0 Planned San Juan La Plata Medium 1 Planned San Juan La Plata High 1 Planned San Juan La Plata Low 8/1/2018 10

244 385290 GREAT WESTERN DRILLING COMPANY - 35600 245 385297 D & B VENTURES - 22111 246 385310 TAYLOR* LLOYD B - 85620 247 385320 RED MESA 248 385332 RED MESA 249 385333 RED MESA 250 385368 REYNOLDS* NOEL - 74500 251 385403 MERIDIAN OIL INC - 56530 252 385467 RED MESA 253 385528 STAVER* JOHN - 82275 254 385598 HATHAWAY OPERATORS, INC - 38550 255 385662 RED MESA 256 385931 RED MESA 257 385978 STANDARD OIL PRODUCTION CO - 81701 258 386316 COLORADO FUEL AND IRON CORPORATION* THE - 100743 259 386334 SULLIVAN* BRUCE - 83685 260 386336 LEWIS DRILLING COMPANY - 100925 1 Planned San Juan La Plata High 0 Planned San Juan La Plata Medium 1 Planned San Juan La Plata Low 0 Planned San Juan La Plata Medium 1 In Progress San Juan La Plata High 1 Planned San Juan La Plata Low 1 Planned Denver-Julesburg Larimer Medium 1 Planned Raton Las Animas Medium 1 Planned Raton Las Animas Medium 1 Planned Raton Las Animas Medium 261 386860 1 0 Planned Denver-Julesburg Lincoln High 262 387482 ANSCHUTZ DRILLING CO. INC. - 3103 263 388009 FALCON SEABOARD DRLG CO - 28810 264 388282 MCDERMOTT - BARNHART - 55210 265 388374 DONNELLY CASING PULLING CO - 24775 266 388480 PEASE OIL & GAS COMPANY - 68050 267 388647 HONDO OIL & GAS CO - 41600 268 388731 MILINDA OIL COMPANY - 57450 269 388933 BEAVER MESA EXPLORATION CO - 6988 270 389133 SINCLAIR OIL & GAS COMPANY - 100835 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan Low 8/1/2018 11

271 389137 SINCLAIR OIL & GAS COMPANY - 100835 272 389243 J & L OIL CORP - 44100 273 389245 J & L OIL CORP - 44100 274 389425 ZEXCO LTD - 98385 275 389988 KEBA OIL & GAS CO - 46350 276 390294 BENCHMARK 277 390446 SOUTHWEST SITES INC - 81417 278 390877 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 279 391537 THINK OIL INC - 87815 280 391788 DOLEZAL JR* GEORGE - 24580 281 392479 VITRUVIAN EXPLORATION LLC - 10026 282 392480 VITRUVIAN EXPLORATION LLC - 10026 283 392678 VAUGHEY & VAUGHEY - 92950 284 392785 ANDERSON* MAC T. - 2989 285 392920 DICKINSON EXPLORATION - 24300 286 392976 VINCENT*GEORG E A. - 93369 287 392984 BEAVER MESA EXPLORATION CO - 6988 288 393006 WOOSLEY OIL CO - 97500 289 393011 MESA VERDE DRILLING - 56860 290 393155 SCOW* MAYLON - 77035 291 393625 NORTHWESTERN MINING & PETRO CO - 64708 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan Low 0 Planned Denver-Julesburg Logan High 4 In Progress Piceance Mesa High 1 In Progress Sand Wash Moffat Medium 1 Planned Sand Wash Moffat Low 0 In Progress Sand Wash Moffat Low 0 In Progress Sand Wash Moffat Low 1 Planned Paradox Montezuma Low 0 Planned Paradox Montezuma Medium 0 Planned Paradox Montezuma Low 1 Planned Paradox Montezuma High 0 In Progress Paradox Montezuma Medium 1 Planned Denver-Julesburg Morgan Medium 292 393868 HUNT*H.L. - 42320 0 Planned Denver-Julesburg Morgan Medium 293 393893 HUNT*H.L. - 42320 0 Planned Denver-Julesburg Morgan Medium 294 394561 GRIFFEX, VESSELS, BASS & BROWN - 35996 295 394575 BEAIRD* PATRICK S & BURKE* JOSEPH E - 69887 296 394622 PRAIRIE OIL & GAS CO - 100859 1 Planned Denver-Julesburg Morgan Medium 1 Planned Denver-Julesburg Morgan High 1 Planned Denver-Julesburg Morgan Medium 297 394744 DYER* J G - 25900 1 Planned Denver-Julesburg Morgan High 298 394748 DYER* J G - 25900 1 Planned Denver-Julesburg Morgan High 299 395310 PAN AMERICAN PETROLEUM CORP - 66802 300 398629 PETROHUNTER 1 Planned Denver-Julesburg Morgan Medium 8/1/2018 12

301 399503 READ & STEVENS INC - 73670 302 400833 TRIANGLE J OIL CO - 89750 303 400864 SNOWDEN OIL CO - 80405 304 400874 COLTEX 18712 305 400927 CARTER OIL CO - 14460 306 401646 NORTHSTAR GAS 307 401730 KOCH* DELBERT - 10603 308 402779 SUMMIT OIL CO - 83700 309 404838 GUIDA* ARTHUR M - 36400 1 In Progress Paradox San Miguel High 1 Planned Denver-Julesburg Washington Low 1 Planned Denver-Julesburg Washington Low 0 Planned Denver-Julesburg Washington Low 0 Planned Denver-Julesburg Washington Medium 0 Planned Denver-Julesburg Washington Low 1 Planned Denver-Julesburg Washington Medium 1 Planned Denver-Julesburg Washington Medium 0 Planned Denver-Julesburg Weld Medium 310 404883 1 0 Planned Denver-Julesburg Weld Low 311 404964 DEVAUGHN OIL & GAS - 100330 312 405136 VAUGHEY & VAUGHEY - 92950 313 405758 BECKER & SLOSS - 6980 314 406180 P & M PETROLEUM MANAGEMENT LLC - 66565 315 407304 LECLAIR- WESTWOOD INC - 50560 316 407442 GENERAL RESOURCES LTD - 33674 317 407613 ORM EXPLORATION CO - 66360 318 410283 MIDFIELDS OIL COMPANY - 100522 319 412851 RED MESA 320 412856 RED MESA 321 412925 RED MESA 322 419495 PINE RIDGE OIL & GAS LLC - 10276 323 419639 RANCHERS EXPLORATION PARTNERS LLC - 10350 324 421302 NOLTE LLC* C J - 10357 325 424448 TOMPKINS & SONS - 100920 326 424598 RED MESA 327 425683 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 0 Planned Denver-Julesburg Weld Low 0 Planned Denver-Julesburg Weld High 1 Planned Denver-Julesburg Weld High 0 Planned Denver-Julesburg Weld Medium 0 Planned Denver-Julesburg Weld Low 0 In Progress Denver-Julesburg Weld High 1 Planned Denver-Julesburg Weld High 0 In Progress Denver-Julesburg Yuma High 0 Planned Canon City Embayment Fremont Low 0 In Progress Denver-Julesburg Larimer Medium 0 Planned Denver-Julesburg Lincoln Low 2 Planned Raton Huerfano Medium 1 Planned Denver-Julesburg Larimer Medium 8/1/2018 13

328 426281 OLD OPERATORS 329 426286 OLD OPERATORS 330 426287 OLD OPERATORS 331 426288 OLD OPERATORS 332 426289 OLD OPERATORS 333 426290 OLD OPERATORS 334 428667 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 1 Planned Canon City Embayment Fremont Medium 1 Planned Canon City Embayment Fremont Low 1 Planned Canon City Embayment Fremont Medium 1 Planned Canon City Embayment Fremont Medium 1 Planned Canon City Embayment Fremont Medium 0 In Progress Canon City Embayment Fremont Medium 1 Planned Piceance Mesa High 335 428668 1 1 Planned Piceance Mesa High 336 428669 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 337 428671 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 338 428672 COLORADO OIL & GAS CONSERVATION COMMISSION - 5 339 430683 PINE RIDGE OIL & GAS LLC - 10276 340 430828 PINE RIDGE OIL & GAS LLC - 10276 341 433053 PINE RIDGE OIL & GAS LLC - 10276 342 435790 RANCHERS EXPLORATION PARTNERS LLC - 10350 343 436124 CM PRODUCTION 344 440386 OLD OPERATORS 345 440389 OLD OPERATORS 346 440392 OLD OPERATORS 347 440400 OLD OPERATORS 348 440411 OLD OPERATORS 0 In Progress Piceance Mesa High 0 Planned Piceance Mesa High 0 Planned Piceance Mesa High 0 In Progress Denver-Julesburg Lincoln Low 0 In Progress Denver-Julesburg Lincoln Low 0 In Progress Denver-Julesburg Lincoln Low 0 In Progress Denver-Julesburg Larimer Medium 1 Planned San Juan Archuleta Medium 1 Planned San Juan Archuleta Low 1 Planned San Juan Archuleta Low 1 Planned San Juan Archuleta Low 1 Planned San Juan Archuleta Medium 8/1/2018 14

349 441404 OLD OPERATORS 350 444882 351 444886 352 446219 CHEROKEE AIR DRILLING, INC. - 16610 353 446268 CHEROKEE AIR DRILLING, INC. - 16610 0 In Progress Piceance Rio Blanco Low 0 Planned Denver-Julesburg Adams Medium 0 Planned Denver-Julesburg Adams Low 0 Planned San Juan La Plata Low 1 Planned San Juan La Plata Low 354 448934 1 1 Planned Piceance Mesa Low 355 450370 MONUMENT 356 450396 RED MOUNTAIN RESOURCES LLC - 10374 357 450399 BENCHMARK 358 450426 BENCHMARK 359 450648 OLD OPERATORS 360 450649 OLD OPERATORS 361 450650 OLD OPERATORS 362 452634 OLD OPERATORS 363 453364 CANFIELD DRILLING COMPANY - 100382 364 453924 HONOLULU EXP & DRLG CORP - 41608 365 454456 TEXAS TEA OF 0 Planned Paradox Montezuma High 0 In Progress Denver-Julesburg Logan High 1 Planned Piceance Rio Blanco Low 0 In Progress Piceance Mesa Low 1 Planned Piceance Garfield Low 0 Planned Piceance Mesa High 0 Planned San Juan La Plata Medium 0 Planned Denver-Julesburg Adams Medium 8/1/2018 15