| Prefix |
Library |
Definition |
Discontinued* |
| AC |
General |
Requests for Approval by Chief Accountant |
No |
| AD |
General |
Administrative |
No |
| AI |
General |
Requests for Interpretations by Chief Accountant |
No |
| AR |
Natural Gas |
Area Rate Proceedings - Independent Natural
Gas Producers |
Yes |
| CA |
General |
Commission Agenda and Related Materials. [Note: this is just a placeholder prefix for eLibrary.] |
No |
CE
|
Electric, Natural Gas, Oil, Hydro, and
General
|
Critical Energy Infrastructure Information
|
No |
| CI |
Natural Gas |
Certificates for Small Independent Natural
Gas Producers & Marketers |
Yes |
| CP |
Natural Gas |
Certificates for Interstate Natural Gas
Pipeline Companies |
No |
| CS |
Natural Gas |
Certificates for Small Independent Natural
Gas Producers |
Yes |
| DA |
Hydro |
Bureau of Land Management - Power Site
Determinations (Replaced by DV, EP, MC, and ML prefixes) |
Yes |
| DI |
Hydro |
Declarations of Intention and Petitions
for Declaratory Order |
No |
| DO |
Oil |
Depreciation and Related Matters Pertaining
to Oil Pipelines |
No |
| DR |
Electric |
Depreciation Rates for Accounting Purposes |
No |
| DV |
Hydro |
Power Site Lands, Restoration, Withdrawal
and Vacation |
No |
| E- |
General |
All Electric Cases (Replaced by ER, ES,
EL, etc. prefixes) |
Yes |
| EC |
Electric |
Applications of Electric Public Utilities
for Authority to Sell, Lease, Purchase, Acquire, or Merge,
and Applications for Determination of Jurisdiction |
No |
| EF |
Electric |
Federal Electric Rates for DOE's Power
Administrations |
No |
| EG |
Electric |
Applications for Exempt Wholesale Generation
Determinations |
No |
| EL |
Electric |
Miscellaneous Formal Filings Related to
Electric Power |
No |
| EM |
Natural Gas |
Emergency Natural Gas Sales, Transportation,
Exchange Transactions and Replacement of Facilities |
No |
| EP |
Hydro |
Power Site Reserves, Classifications and
Designations - Right-of-Way or Lease of Federal Lands |
No |
| ER |
Electric |
Electric Rate Filings |
No |
| ES |
Electric |
Issuance of Securities and Assumption of
Liabilities of Electric Utilities |
No |
| ET |
Electric |
Application for Permit to Site Interstate Electric Transmission Facilities |
No |
| EX |
Electric |
Electric Discussion Items |
No |
| EY |
Electric |
Emergency Reports for Deviations from Standards
of Conduct |
No |
| FA |
General |
Financial Audits by the Chief Accountant
for Jurisdictional Companies |
No |
| FC |
Electric or Natural Gas |
Foreign Utility Company Request |
No |
| FS |
Oil |
Fourth Section Applications of Oil Pipelines |
Yes |
| G- |
Natural Gas |
Gas Cases - Used Prior to 1960 |
Yes |
| GP |
Natural Gas |
General Tracking Docket Category for Matters
Under the Natural Gas Policy Act |
No |
| GT |
Natural Gas |
General Tariff Changes for Interstate Gas
Pipelines |
No |
| GX |
Natural Gas |
Gas Discussion Items |
No |
| HB |
Hydro |
Headwater Benefits Related to Hydroelectric
Projects |
No |
| HC |
Electric or Natural Gas |
Certain Filings by Holding Companies under PUHCA |
No |
| IC |
General |
Information Collections - Public Involvement
on the Development of the Commission's Information Collection
Requirements Prior to OMB Approval |
No |
| ID |
Electric |
Interlocking Directorates for Electric
Utilities |
No |
| IN |
General |
Investigations Instituted by OGC-Enforcement |
No |
| IR |
Electric |
Requests for Waiver of PURPA Regulations |
Yes |
| IS |
Oil |
Investigations and Suspensions into Rates,
Fares, Charges, and Practices of Oil Pipelines |
No |
| IT |
Electric |
International Transmission - Electric |
Yes |
| JD |
Natural Gas, Oil |
Well Category Determinations by State and
Federal Jurisdictional Agencies |
Yes |
| JR |
Hydro |
Jurisdictional Reviews of Licensed Projects |
No |
| MC |
Hydro |
Mining Claims for Locatable Minerals |
No |
| MG |
Natural Gas |
Marketing Affiliates Non-Tariff General
Filings under Order No. 497 |
No |
| ML |
Hydro |
Mineral Leases Usually Oil & Gas |
No |
| MO |
Electric |
State of the Market Reports |
No |
| MS |
General |
Miscellaneous Correspondence or Notice. [Note: this is just a placeholder prefix for eLibrary.] |
No |
| MT |
Natural Gas |
Tariff Filings under Order No. 497 |
No |
| NJ |
Electric |
Non-Jurisdictional / Electric |
No |
| NL |
Electric, Natural Gas, Oil |
No-Action Letter |
No |
| NP |
Electric |
Notices of Proposed Penalties – from NERC |
No |
| NR |
General |
News Releases. [Note: this is just a placeholder prefix for eLibrary.] |
No |
| OA |
Electric |
Open Access Transmission Tariffs |
No |
| OR |
Oil |
Oil Pipeline Rate Cases |
No |
| OT |
Oil |
Oil Pipeline Tariffs |
No |
| P- |
Hydro |
Hydropower Projects |
No |
| PA |
Electric,
Natural Gas, Oil, Hydro, General |
Audits other than financial audits by the
Chief Accountant |
No |
| PD |
Oil |
Depreciation and Related Matters Pertaining
to Oil Pipelines (prior to March 21, 1989) |
Yes |
| PF |
Natural Gas |
PreFiling NEPA activities for proposed
gas pipelines |
No |
| PH |
Electric or Natural Gas |
Exemption from or Waiver of Regulation
as Holding Company (FERC-65A [Exemption Notification] and
FERC-65B [Waiver Notification]) |
No |
| PL |
General, Rulemaking |
General Policy Cases |
No |
| PR |
Natural Gas |
Petitions for Rate Approval for Transportation
of Natural Gas under NGPA |
No |
| PT |
Electric |
Pre-Filing Activity for Siting Interstate Electric Transmission Facilities |
No |
| PV |
Oil |
Oil Pipeline Valuation Rates |
Yes |
| QF |
Electric |
Qualifying Status of Cogeneration and Small
Power Production Facilities |
No |
| QM |
Electric |
Relief from, or Reinstatement of, Mandatory Purchase or Sell Requirement between
Utility and Qualifying Facility, as mandated by the Energy Policy Act of 2005 |
No |
| R- |
General |
Rulemakings (Prior to Formation of RM Prefix
- Fiscal Year 1974) |
Yes |
| RA |
Natural Gas, Oil |
Appeals form Denial of Requests for Adjustments
Issued by Economic Regulatory Administration, DOE |
No |
| RC |
Electric |
Compliance and Enforcement of Reliability
Standards |
No |
| RD |
Electric |
Electric Reliability Standards |
No |
| RE |
Electric |
Requests for Extensions of Time or Exemptions
under PURPA |
Yes |
| RI |
Natural Gas, Oil |
Rates for Independent Natural Gas Producers |
Yes |
| RM |
General, Rulemaking |
Rulemaking Proceedings |
No |
| RO |
Natural Gas, Oil |
Appeals from Remedial Orders Issued by
Economic Regulatory Administration, DOE |
No |
| RP |
Natural Gas |
Rates for Interstate Natural Gas Pipeline
Companies |
No |
| RR |
Electric |
ERO Rules and Organizational Filings |
No |
| RS |
Natural Gas |
Restructuring Gas Cases under Order No.
636 |
No |
| RT |
Electric |
Electric Rate Filings - Rate Transmission |
No |
| SA |
Natural Gas |
Staff Adjustments under Section 502 of
NGPA |
No |
| SC |
Electric |
Stranded Costs / Electric |
No |
| SP |
Oil |
Special Permission Application or Waivers
for Oil Pipelines |
Yes |
| ST |
Natural Gas |
Transportation Annual Reports / Gas |
Yes |
| TA |
Natural Gas |
Annual Tracking Filings of Interstate Natural
Gas Pipelines |
Yes |
| TC |
Natural Gas |
Tariff Curtailments of Interstate Natural
Gas Pipelines |
No |
| TF |
Natural Gas |
Flexible Tracking Adjustments not Accompanied
by Quarterly or Annual PGA Filings |
No |
| TM |
Natural Gas |
Miscellaneous Tracking Adjustments not
Accompanied by Quarterly or Annual PGA Filings |
No |
| TQ |
Natural Gas |
Quarterly Tracking Filings and Out-of-Cycle
PGA Filings of Interstate Natural Gas Pipelines |
No |
| TS |
Electric, Natural Gas |
Transmission Standards |
No |
| TX |
Electric |
Transmission Services under Section 211
of the Federal Power Act |
No |
| UL |
Hydro |
Unlicensed Hydroelectric Projects |
No |
| ZZ |
Electric or Natural Gas |
Tracking Docket for Certain Non-Docketed Submissions |
No |
