Mills Cary
Operator of record for 26 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Mills Cary is the operator of record for 26 catalogued U.S. oil & gas wells in 1 state. 25 (96%) are active, 1 (4%) plugged & abandoned. Its largest concentration is in New York, with 26 wells (100% of its portfolio).
Wells operated
26
Active
25
Plugged
1
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| New York | 26 |
Well mix
- Oil wells
- 26
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 96%
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Claim your operator profileWhere does Mills Cary operate?
Mills Cary's catalogued wells are spread across 1 state: New York (26). Its 26 New York wells are 0.1% 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 Mills Cary’s wells are active, plugged or orphaned?
96% of Mills Cary's catalogued wells are active, 67 percentage points above the national share of 29%. 4% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Mills Cary operate?
By product class, 26 (100%) 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 Spafford 15 in Cattaraugus, NY at 1,860 ft.
Notable wells operated by Mills Cary
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Spafford 15 | 31-009-23482 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,860 ft |
| Spafford 1 | 31-009-62762 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,702 ft |
| Spafford 2 | 31-009-62763 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,664 ft |
| Spafford 13 | 31-009-23538 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,477 ft |
| Degitz 4 | 31-009-22011 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,475 ft |
| Hamm 14 | 31-009-21736 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,420 ft |
| Hamm 10 | 31-009-62778 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,370 ft |
| Hamm 8 | 31-009-62776 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,360 ft |
| Spafford 2 | 31-009-60628 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,321 ft |
| Spafford 3 | 31-009-62764 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,257 ft |
| Degitz 6 | 31-009-22285 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,256 ft |
| Spafford 5 | 31-009-62766 | Active | Oil | Cattaraugus, NY | Mills Cary | 1,242 ft |
Deepest first where depth is published. See all 26 wells →
Frequently asked questions
How many wells does Mills Cary operate?
Mills Cary is the operator of record for 26 catalogued oil & gas wells, with the largest concentration in New York (26). Only wells in states WellCensus has ingested are counted.
How many of Mills Cary's wells are still active?
25 of Mills Cary's catalogued wells are active; 1 are plugged & abandoned.
In which states does Mills Cary operate wells?
Mills Cary is the operator of record for wells in New York (26).
Does Mills Cary operate mostly oil or gas wells?
26 of Mills Cary's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Mills Cary's deepest well?
Among wells with a published depth, Spafford 15 in Cattaraugus, NY is the deepest at 1,860 ft.
Where Mills Cary'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, “Mills Cary — well portfolio”, https://wellcensus.com/operators/mills-cary-127321 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).