Ledder Exploration
Operator of record for 10 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Ledder Exploration is the operator of record for 10 catalogued U.S. oil & gas wells in 1 state. 1 (10%) are active, 8 (80%) plugged & abandoned. Its largest concentration is in Illinois, with 10 wells (100% of its portfolio).
Wells operated
10
Active
1
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 10 |
Well mix
- Oil wells
- 5
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 10%
Is this your company?
Claim Ledder Exploration to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Ledder Exploration operate?
Ledder Exploration's catalogued wells are spread across 1 state: Illinois (10). Its 10 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 Ledder Exploration’s wells are active, plugged or orphaned?
10% of Ledder Exploration's catalogued wells are active, 19 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 Ledder Exploration operate?
By product class, 5 (50%) 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 Cokley 1-A in Richland, IL at 3,800 ft. The wells listed below sit in Richland (IL), Hamilton (IL), Clay (IL), Jasper (IL) and Lawrence (IL).
Notable wells operated by Ledder Exploration
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Cokley 1-A | 12-159-24499 | Plugged & abandoned | Other type | Richland, IL | Ledder Exploration, Inc. | 3,800 ft |
| Mansell Richard 1 | 12-065-24937 | Plugged & abandoned | Other type | Hamilton, IL | Ledder Exploration, Inc. | 3,493 ft |
| Lazaretti 4 | 12-025-27971 | Active | Oil | Clay, IL | Ledder Exploration, Inc. | 3,075 ft |
| Brooks, W. E. 4 | 12-025-27914 | Plugged & abandoned | Oil | Clay, IL | Ledder Exploration, Inc. | 2,860 ft |
| Brooks 5 | 12-025-27950 | Plugged & abandoned | Oil | Clay, IL | Ledder Exploration, Inc. | 2,860 ft |
| Cokley 1 | 12-159-24454 | Plugged & abandoned | Other type | Richland, IL | Ledder Exploration, Inc. | 2,622 ft |
| Frichtl 1 | 12-079-24377 | Plugged & abandoned | Oil | Jasper, IL | Ledder Exploration, Inc. | 1,960 ft |
| Hawf Heirs 4 | 12-101-29644 | Plugged & abandoned | Other type | Lawrence, IL | Ledder Exploration, Inc. | 1,630 ft |
| Hawf Heirs 3 | 12-101-29643 | Plugged & abandoned | Oil | Lawrence, IL | Ledder Exploration, Inc. | 1,540 ft |
| Edmonson, C. 2 | 12-101-05512 | Other status | Other type | Lawrence, IL | Ledder Exploration, Inc. | 0 ft |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Ledder Exploration operate?
Ledder Exploration is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Illinois (10). Only wells in states WellCensus has ingested are counted.
How many of Ledder Exploration's wells are still active?
1 of Ledder Exploration's catalogued wells are active; 8 are plugged & abandoned.
In which states does Ledder Exploration operate wells?
Ledder Exploration is the operator of record for wells in Illinois (10).
Does Ledder Exploration operate mostly oil or gas wells?
5 of Ledder Exploration's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Ledder Exploration's deepest well?
Among wells with a published depth, Cokley 1-A in Richland, IL is the deepest at 3,800 ft.
Where Ledder Exploration'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, “Ledder Exploration — well portfolio”, https://wellcensus.com/operators/ledder-exploration-94096 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).