O Donnell & Edmondson
Operator of record for 21 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: O' DONNELL & EDMONDSON · O'DONNELL & EDMONDSON
At a glance
O Donnell & Edmondson is the operator of record for 21 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 20 (95%) are plugged & abandoned. Its largest concentration is in Colorado, with 18 wells (86% of its portfolio).
Wells operated
21
Active
0
Plugged
20
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 18 |
| Wyoming | 3 |
Well mix
- Oil wells
- 3
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does O Donnell & Edmondson operate?
O Donnell & Edmondson's catalogued wells are spread across 2 states: Colorado (18) and Wyoming (3). Its 18 Colorado wells are 0.0% of the 124,327 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of O Donnell & Edmondson’s wells are active, plugged or orphaned?
0% of O Donnell & Edmondson's catalogued wells are active, 29 percentage points below the national share of 29%. 95% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does O Donnell & Edmondson operate?
By product class, 3 (14%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is 1 Arthur Harms in Weld, CO at 7,290 ft. The wells listed below sit in Weld (CO), Morgan (CO), Adams (CO), Logan (CO) and Washington (CO). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by O Donnell & Edmondson
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 Arthur Harms | 05-123-05826 | Plugged & abandoned | Other type | Weld, CO | O'Donnell & Edmondson | 7,290 ft |
| 1 Turner | 05-123-05439 | Plugged & abandoned | Other type | Weld, CO | O'Donnell & Edmondson | 6,659 ft |
| 1 Baer | 05-087-05816 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 6,455 ft |
| 1 Jacobson | 05-087-06401 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 6,352 ft |
| 1 J R Mylander | 05-087-06421 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 6,343 ft |
| 1 Leffler | 05-087-06235 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 6,329 ft |
| 1 Mylander | 05-087-06420 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 6,251 ft |
| 1 State | 05-123-05563 | Plugged & abandoned | Other type | Weld, CO | O'Donnell & Edmondson | 6,040 ft |
| 1 C L Irey | 05-001-05445 | Plugged & abandoned | Other type | Adams, CO | O'Donnell & Edmondson | 5,905 ft |
| 1 Chase | 05-087-05979 | Plugged & abandoned | Other type | Morgan, CO | O'Donnell & Edmondson | 5,675 ft |
| 1 Warnecke | 05-075-06238 | Plugged & abandoned | Other type | Logan, CO | O'Donnell & Edmondson | 5,420 ft |
| 1 Moffatt | 05-121-05981 | Plugged & abandoned | Other type | Washington, CO | O'Donnell & Edmondson | 5,113 ft |
Deepest first where depth is published. See all 21 wells →
Frequently asked questions
How many wells does O Donnell & Edmondson operate?
O Donnell & Edmondson is the operator of record for 21 catalogued oil & gas wells, with the largest concentration in Colorado (18). Only wells in states WellCensus has ingested are counted.
How many of O Donnell & Edmondson's wells are still active?
0 of O Donnell & Edmondson's catalogued wells are active; 20 are plugged & abandoned.
In which states does O Donnell & Edmondson operate wells?
O Donnell & Edmondson is the operator of record for wells in Colorado (18) and Wyoming (3).
Does O Donnell & Edmondson operate mostly oil or gas wells?
3 of O Donnell & Edmondson's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is O Donnell & Edmondson's deepest well?
Among wells with a published depth, 1 Arthur Harms in Weld, CO is the deepest at 7,290 ft.
Where O Donnell & Edmondson's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “O Donnell & Edmondson — well portfolio”, https://wellcensus.com/operators/o-donnell-edmondson-3260 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).