Mcmahon Wallace
Operator of record for 12 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Mcmahon Wallace is the operator of record for 12 catalogued U.S. oil & gas wells in 1 state. 6 (50%) are active, 5 (42%) plugged & abandoned. Its largest concentration is in Illinois, with 12 wells (100% of its portfolio).
Wells operated
12
Active
6
Plugged
5
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 12 |
Well mix
- Oil wells
- 9
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 50%
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Claim your operator profileWhere does Mcmahon Wallace operate?
Mcmahon Wallace's catalogued wells are spread across 1 state: Illinois (12). Its 12 Illinois wells are 0.0% of the 174,478 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 Mcmahon Wallace’s wells are active, plugged or orphaned?
50% of Mcmahon Wallace's catalogued wells are active, 21 percentage points above the national share of 29%. 42% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Mcmahon Wallace operate?
By product class, 9 (75%) 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 Fender, Joseph 1 in Clark, IL at 2,484 ft.
Notable wells operated by Mcmahon Wallace
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Fender, Joseph 1 | 12-023-01320 | Plugged & abandoned | Oil | Clark, IL | McMahon, Wallace | 2,484 ft |
| Biggs 1 | 12-023-01363 | Plugged & abandoned | Oil | Clark, IL | McMahon, Wallace | 2,468 ft |
| Turner 1 | 12-023-01352 | Plugged & abandoned | Oil | Clark, IL | McMahon, Wallace | 2,448 ft |
| Mitchell, Katie 5-WS | 12-023-02959 | Other status | Other type | Clark, IL | McMahon, Wallace | 590 ft |
| Mitchell, Katie 1 | 12-023-01461 | Active | Oil | Clark, IL | McMahon, Wallace | 530 ft |
| Shaw, Vera E. 1 | 12-023-03153 | Plugged & abandoned | Other type | Clark, IL | McMahon, Wallace | 519 ft |
| Fender, Joseph 1-A | 12-023-01469 | Plugged & abandoned | Oil | Clark, IL | McMahon, Wallace | 500 ft |
| Mitchell, Katie 2 | 12-023-01499 | Active | Oil | Clark, IL | McMahon, Wallace | 420 ft |
| Mitchell, Katie 4 | 12-023-02921 | Active | Oil | Clark, IL | McMahon, Wallace | 420 ft |
| Mitchell, Katie 6-W.I. | 12-023-03003 | Active | Injection | Clark, IL | McMahon, Wallace | 414 ft |
| Mitchell, Katie 3 | 12-023-02900 | Active | Oil | Clark, IL | McMahon, Wallace | 410 ft |
| Biggs, R.L. 2 | 12-023-03123 | Active | Oil | Clark, IL | McMahon, Wallace | 400 ft |
Deepest first where depth is published. See all 12 wells →
Frequently asked questions
How many wells does Mcmahon Wallace operate?
Mcmahon Wallace is the operator of record for 12 catalogued oil & gas wells, with the largest concentration in Illinois (12). Only wells in states WellCensus has ingested are counted.
How many of Mcmahon Wallace's wells are still active?
6 of Mcmahon Wallace's catalogued wells are active; 5 are plugged & abandoned.
In which states does Mcmahon Wallace operate wells?
Mcmahon Wallace is the operator of record for wells in Illinois (12).
Does Mcmahon Wallace operate mostly oil or gas wells?
9 of Mcmahon Wallace's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Mcmahon Wallace's deepest well?
Among wells with a published depth, Fender, Joseph 1 in Clark, IL is the deepest at 2,484 ft.
Where Mcmahon Wallace'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, “Mcmahon Wallace — well portfolio”, https://wellcensus.com/operators/mcmahon-wallace-92560 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).