Markham Et Al
Operator of record for 1 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Markham Et Al is the operator of record for 1 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 0 (0%) are plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in New York, with 1 wells (100% of its portfolio).
Wells operated
1
Active
0
Plugged
0
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| New York | 1 |
Well mix
- Oil wells
- 0
- Gas wells
- 1
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Markham Et Al to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Markham Et Al operate?
Markham Et Al's catalogued wells are spread across 1 state: New York (1). Its 1 New York wells are 0.0% of the 46,514 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 Markham Et Al’s wells are active, plugged or orphaned?
0% of Markham Et Al's catalogued wells are active, 29 percentage points below the national share of 29%. 0% are plugged & abandoned, against 47% nationally. 1 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Markham Et Al operate?
By product class, 0 (0%) are oil wells and 1 (100%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Dorr 1 in Steuben, NY at 1,220 ft.
Notable wells operated by Markham Et Al
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Dorr 1 | 31-101-04312 | Orphaned | Gas | Steuben, NY | Markham et al | 1,220 ft |
Deepest first where depth is published. See all 1 wells →
Frequently asked questions
How many wells does Markham Et Al operate?
Markham Et Al is the operator of record for 1 catalogued oil & gas wells, with the largest concentration in New York (1). Only wells in states WellCensus has ingested are counted.
How many of Markham Et Al's wells are still active?
0 of Markham Et Al's catalogued wells are active; 0 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Markham Et Al operate wells?
Markham Et Al is the operator of record for wells in New York (1).
Does Markham Et Al operate mostly oil or gas wells?
0 of Markham Et Al's catalogued wells are oil wells and 1 are gas wells; the rest are injection, service or unclassified wells.
What is Markham Et Al's deepest well?
Among wells with a published depth, Dorr 1 in Steuben, NY is the deepest at 1,220 ft.
Where Markham Et Al'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, “Markham Et Al — well portfolio”, https://wellcensus.com/operators/markham-et-al-71127 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).