Expired federal NEPA reviews in the Greater Green River Basin
Federal National Environmental Policy Act (NEPA) reviews are filed separately from the drilling permits and leases that depend on them. Across the Greater Green River Basin, the key document may be a Bureau of Land Management environmental assessment, a Finding of No Significant Impact, an environmental impact statement, or a categorical-exclusion determination. Some are easy to locate; others survive only in a legacy archive, agency docket or records-request response.
An expired review does not automatically mean a well is abandoned or its permit is invalid. It usually means a document must be checked again before someone relies on it for a new federal action, renewed authorisation or changed scope. Permits, leases, rights-of-way and NEPA documents have separate dates and conditions, so they should not be treated as interchangeable.
For Australian readers, this is different from a typical east-coast LNG or Queensland coal-seam-gas due-diligence process. The Surat Basin combines state sign-off, native-title processes and negotiated pastoral access, while Sydney Basin proposals often become public land-access and water-use debates. No Australian register substitutes for federal sign-off, just as no state approval in the United States replaces BLM review.
How to identify an expired federal NEPA review
NEPA requires federal agencies to analyse environmental effects before taking major federal actions. A BLM project may use a categorical exclusion, an environmental assessment followed by a FONSI, or an environmental impact statement followed by a record of decision. The public document and the underlying approval are related, but they are not the same record.
There is no universal expiry date for every review. Some BLM authorisations have a stated validity period; others need rechecking when scope or site conditions change, new information appears, or a superseding decision replaces the original. An old-looking EIS may still control, while a recent upload may update only an attached permit. Look for “valid through,” renewal, supplemental review and validity-check language.
Search “expired NEPA” and “NEPA validity,” but also search the procedural terms. A project may have no file called an expired review. It may be indexed as an EA, FONSI, CE, CE/FONSI determination, ROD, validity confirmation or supplemental EA. This vocabulary connects map records to the regulatory file without assuming that age equals legal expiry.
Where federal review records are published
Begin with BLM's ePlanning National NEPA Database and DOI's Legacy NEPA Database. They cover different eras and may contain duplicate or differently named entries. Some categorical exclusions were never docketed publicly, so an absence from ePlanning does not prove that no review occurred. Search by project, operator and county, then inspect the document and attachments.
Older Wyoming records may require a request to the BLM Wyoming State Office or a Freedom of Information Act search, especially when ePlanning omits attachments. The Federal Register publishes notices of availability, FONSI notices and records of decision for larger projects. It helps confirm formal dates, but it is not a complete repository: an agency file may contain approved maps, lease stipulations and permit conditions without reproducing them.
For a map-driven search, the permit-search checklist explains how to isolate a specific drilling permit rather than nearby wells. On federal land, use the permit identifier and attached NEPA number to find the controlling review. On state or private ground, establish whether another federal agency, rather than BLM, performed the analysis.
Searching the basin by project identifiers
A productive search begins with township, range, section and BLM serial number. Add the operator, project name, API well number, drilling permit number and county. In southwest Wyoming, Sublette, Sweetwater, Lincoln and Uinta can help narrow the field; northern Colorado projects may fall under Moffat, Routt or Rio Blanco records. Search both the production name and formal operating-unit name because they rarely match perfectly.
Shale Navigator can place permits, leases, lease offers, pipelines and mineral-rights layers over the same area. Start broad enough to see the play boundary, then constrain by date, operator and location. A map pin establishes geography, not proof that the federal action has been reviewed, approved or renewed.
Basin terminology changes over time: projects may be grouped under the DJ Basin, Washakie, Over-the-Horizon, Powder River or an operator's unit. Try company-name variations and preserve the NEPA identifier in your notes. Then make the old Australian “boots on ground” check—confirm the pad, access road, pipeline and current activity against imagery and county records.
Why land status changes the result
The federal nexus controls where the record should be. BLM may prepare the review for a federal lease, right-of-way, surface-use authorisation or another action on federal land. A state drilling permit on private ground is different, although a federal loan, crossing or land authorisation can still bring another agency into the review.
Surface and mineral ownership can also be split. A federal surface-use review may coexist with private mineral leases, while a valid lease does not establish that the current pad, road or pipeline has federal approval. Near the Wind River Reservation, check tribal boundaries and Bureau of Indian Affairs records carefully. A tribal or trust-land decision is not interchangeable with a BLM decision.
That separation resembles the Australian market in another way: one gas project can involve a state agency, a native-title process, a pastoral access agreement and a separate environmental decision. The U.S. sequence may instead involve BLM, a state engineer, county records, a tribal government and private leaseholders. Proximity on a map does not merge those records.
Where companion agency records appear
For wetlands or waters, look for a U.S. Army Corps of Engineers authorisation under Section 404 or a nationwide permit. The Corps ePermits search may identify the permit and related documents, but an authorisation number does not replace the BLM NEPA decision. Some regional conditions and water-quality studies sit in state files instead.
Wildlife questions commonly lead to a U.S. Fish and Wildlife Service biological opinion, survey or consultation record. Colorado or Wyoming agencies may hold air-quality permits, discharge approvals and pipeline information, while state water records identify crossings and rights. These records help verify site conditions and dates; they do not independently prove that a federal NEPA review expired.
Reconcile dates across the file: permit issue, FONSI or ROD signature, any stated validity date, and modifications to the permit or lease. That chronology is more reliable than one “last updated” date on a mapping page.
Evidence to collect for a reliable finding
Start with the controlling document, then add identifiers that make it independently retrievable. A reliable file should answer three questions: which federal action was reviewed, where it occurred, and what event makes the review stale or due for renewal.
Core document trail
- The CE, EA and FONSI, or EIS and ROD, with every attachment and cited map.
- The NEPA number, project name, document type, signature date and stated validity period.
- Any validity confirmation, supplemental EA, revised FONSI or formal extension.
- The associated permit or authorisation showing that it adopted the review.
Location and status checks
- The legal description, township, range, section, BLM serial number and county.
- The API number, pad or well name, operator and effective dates.
- Surface ownership, mineral lease status and any tribal or private-land boundary.
- Date-stamped agency records showing a project change, renewal or continued use.
Compare document maps with current permits and imagery, but let the official agency record control. If files conflict, ask the responsible agency which decision governs and record the reply. A mapping application can organise the evidence; it cannot resolve a legal conflict on its own.
Build a defensible verification trail
Work from the most precise identifier and keep an audit trail for each project: search term, source, download date, document status and reason for treating the review as expired. Keep original PDFs because attachments may disappear from newer databases. For repeated due diligence, name files by NEPA number and legal description rather than field nickname.
Shale Navigator is useful for testing geography and relationships between permits, pipelines, lease offers and available mineral rights. These layers can expose stale entries, duplicate well names or development beyond the original project area. Federal documents should still be retrieved from their official repositories rather than inferred from the map.
Keep the finding narrow: identify the exact review, state the date or change affecting its use, and list companion records checked. If expiry or renewal status cannot be confirmed, flag it for agency follow-up rather than calling it expired. Open a free seven-day account to test the relevant layers and build a consistent project file before committing to a longer subscription.