Monarch Development
Operator of record for 10 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: MONARCH DEVELOPMENT CO · Monarch Development Co.
At a glance
Monarch Development is the operator of record for 10 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 8 (80%) are plugged & abandoned. Its largest concentration is in Illinois, with 8 wells (80% of its portfolio).
Wells operated
10
Active
0
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 8 |
| Michigan | 2 |
Well mix
- Oil wells
- 3
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Monarch Development operate?
Monarch Development's catalogued wells are spread across 2 states: Illinois (8) and Michigan (2). Its 8 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 Monarch Development’s wells are active, plugged or orphaned?
0% of Monarch Development's catalogued wells are active, 29 percentage points below the national share of 29%. 80% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Monarch Development operate?
By product class, 3 (30%) 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 Weidner, G. L. 1 in Clay, IL at 3,060 ft. The wells listed below sit in Clay (IL) and Kalkaska (MI). 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 Monarch Development
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Weidner, G. L. 1 | 12-025-01870 | Plugged & abandoned | Other type | Clay, IL | Monarch Development Co. | 3,060 ft |
| Franklin 1 | 12-025-01917 | Plugged & abandoned | Oil | Clay, IL | Monarch Development Co. | 3,053 ft |
| Compher - Devore 1 | 12-025-01838 | Plugged & abandoned | Oil | Clay, IL | Monarch Development Co. | 3,052 ft |
| Eastin, Leo 1 | 12-025-01834 | Plugged & abandoned | Oil | Clay, IL | Monarch Development Co. | 3,045 ft |
| Hagen 3 | 12-025-01760 | Plugged & abandoned | Other type | Clay, IL | Monarch Development Co. | 3,005 ft |
| Bennett 1 | 12-025-01806 | Plugged & abandoned | Other type | Clay, IL | Monarch Development Co. | 2,700 ft |
| Joplin, Stella 1 | 12-025-01946 | Plugged & abandoned | Other type | Clay, IL | Monarch Development Co. | 2,532 ft |
| Antrim Iron Company 2 | 21-079-08357 | Other status | Other type | Kalkaska, MI | Monarch Development Co | 1,947 ft |
| Antrim Iron Company 1 | 21-079-08241 | Other status | Other type | Kalkaska, MI | Monarch Development Co | 1,620 ft |
| Nettleton 1 | 12-025-28785 | Plugged & abandoned | Other type | Clay, IL | Monarch Development Co. | 0 ft |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Monarch Development operate?
Monarch Development is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Illinois (8). Only wells in states WellCensus has ingested are counted.
How many of Monarch Development's wells are still active?
0 of Monarch Development's catalogued wells are active; 8 are plugged & abandoned.
In which states does Monarch Development operate wells?
Monarch Development is the operator of record for wells in Illinois (8) and Michigan (2).
Does Monarch Development operate mostly oil or gas wells?
3 of Monarch Development's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Monarch Development's deepest well?
Among wells with a published depth, Weidner, G. L. 1 in Clay, IL is the deepest at 3,060 ft.
Where Monarch Development'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, “Monarch Development — well portfolio”, https://wellcensus.com/operators/monarch-development-93604 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).