UNGSF Annual Report Instructions

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__
GENERAL INSTRUCTIONS
All section references are to Title 49 of the Code of Federal Regulations (49 CFR). This Annual Report is required
per §191.17 and must be filed per §191.7. Read through the Annual Report and instructions carefully before
beginning the Report.
Each operator of an underground natural gas storage facility must submit an Annual Report for that system on DOT
Form PHMSA 7100.4-1. This report must be submitted each year, not later than March 15, and provide information
about wells, reservoirs, and geologic storage formations as-of December 31 of the previous year. Surface piping
should be reported on PHMSA Form F7100.2-1, Gas Transmission and Gathering Annual Report. If an operator
discovers an error in a submitted annual report, a supplemental report should be filed. Changes made to the
underground natural gas storage facility after the end of the reporting year should not result in a supplemental
report.
The term “underground natural gas storage facility” is defined in §192.3. Additional terms are defined in
American Petroleum Institute (API) Recommended Practice (RP) 1170, “Design and Operation of Solution-mined
Salt Caverns used for Natural Gas Storage” and API RP 1171, “Functional Integrity of Natural Gas Storage in
Depleted Hydrocarbon Reservoirs and Aquifer Reservoirs.”
If you need copies of the Form PHMSA F 7100.4-1 and/or these instructions, they can be found on
http://www.phmsa.dot.gov/pipeline/library/forms. The documents are included in the section titled
Accident/Incident/Annual Reporting Forms.
ONLINE REPORTING REQUIREMENTS
Annual Reports must be submitted online through the PHMSA Portal at
https://portal.phmsa.dot.gov/PHMSAPortal2, unless an alternate method is approved (see Alternate Reporting
Methods below).
You will not be able to submit reports until you have met all of the Portal registration requirements – see
http://opsweb.phmsa.dot.gov/portal_message/PHMSA_Portal_Registration.pdf
Completing these registration requirements could take several weeks. Plan ahead and register well in advance of
the report due date.
REPORTING METHOD
Use the following procedure for online reporting:
1. Go to the PHMSA Portal at https://portal.phmsa.dot.gov/PHMSAPortal2
2. Enter PHMSA Portal Username and Password; press enter
3. Select OPID; press “continue” button.
4. Under “Create Reports” on the left side of the screen, under Annual select “Underground
Natural Gas Storage Facility” and proceed with entering your data. Only one annual report for
an OPID may be submitted per year.

page 1 of 6

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__
5. To save intermediate work without formally submitting it to PHMSA, click Save. To modify a
draft of an annual report that you saved, go to Saved Reports and click on Underground Natural
Gas Storage Facility. Locate your saved report by the date or report year. Select the record by
clicking on it once, and then click Modify above the record.
6. Once all sections of the form have been completed, click on Validate to ensure all required fields
have been completed and data meets all other requirements. A list of errors will be generated
that must be fixed prior to submitting an Annual Report.
7. Click Submit when you have completed the Report (for either an Initial Report or a Supplemental
Report), and are ready to initiate formal submission of your Report to PHMSA.
8. A confirmation message will appear that confirms a record has been successfully submitted. To
save or print a copy of your submission, go to Submitted Reports on the left hand side, and click
on Underground Natural Gas Storage Facility Gas. Locate your submitted report by the date or
report year, and then click on the PDF icon to either open the file and print it, or save an
electronic copy.
9. To submit a Supplemental Report, go to Submitted Reports on the left hand side, and click on
Underground Natural Gas Storage Facility. Locate your submitted report by the date or report
year. Select the record by clicking on it once, and then click “Create Supplemental”.
Alternate Reporting Methods
Operators for whom electronic reporting imposes an undue burden and hardship may submit a written request for
an alternative reporting method. Operators must follow the requirements in §191.7(d) to request an alternative
reporting method and must comply with any conditions imposed as part of PHMSA’s approval of an alternate
reporting method.
SPECIFIC INSTRUCTIONS
Make an entry in each block for which data is available. Estimate data only if necessary. Avoid entering any data
as UNKNOWN or 0 (zero) except where zero is appropriate to indicate that there were no instances or amounts of
the attribute being reported.
Enter the Calendar Year for which the Report is being filed, bearing in mind that the report should reflect the system
as-of the end of that calendar year.
The Initial Report or Supplemental Report box will be populated by the online system.
For a given OPID, a single Annual Report is permitted each year. Create a Part B for each facility operated
under your OPID. Create a Part C for each reservoir or geologic storage formation within a facility.

page 2 of 6

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__
PART A – OPERATOR INFORMATION
Part A is completed once for each Annual Report.
A1. Operator’s 5-digit Identification Number (OPID)
For online entries, the OPID will automatically populate based on the selection you made when entering the Portal.
If you have log-in credentials for multiple OPID, be sure the report is being created for the appropriate OPID.
Contact PHMSA’s Information Resources Manager at 202-366-8075 if you need assistance with an OPID.
A2. Name of Operator
This is the company name associated with the OPID. For online entries, the name will be automatically populated
based on the OPID entered in A1. If the name that appears is not correct, you need to submit an Operator Name
Change (Type A) Notification.
A3. Address of Operator
This is the headquarters address associated with the OPID. For online entries, the address will automatically
populate based on the OPID entered in A1. If the address that appears is not correct, you need to change it in the
online Contacts module.
PART B – STORAGE FACILITY
Part B is completed once for each underground natural gas storage facility operated by your OPID.
B1. Facility Name
Enter the name commonly used by your company to identify the facility.
B2. INTERstate or INTRAstate
INTERstate means a facility subject to the jurisdiction of the Federal Energy Regulatory Commission (FERC) under
the Natural Gas Act (15 U.S.C. 717 et seq.).
INTRAstate means a facility not subject to the jurisdiction of FERC under the Natural Gas Act (15 U.S.C. 717 et seq.).
B3. Facility Location
Enter the latitude, longitude, State, and County for the storage facility. If you have already selected a latitude and
longitude within the facility for other reporting or communication purposes, report it in this question. Otherwise,
identify a latitude and longitude within the facility and report it in this question. All locations in the United States
have a negative longitude coordinate, which is added by the data collection software. Do not enter the negative
sign in the longitude field.
B4. Energy Information Administration (EIA) Gas Field Code
Enter the EIA gas field code for the facility – see http://www.eia.gov/naturalgas/fieldcode/.
Gas Volumes
B5. Working gas capacity
Enter the working gas capacity in billion standard cubic feet (BCF) and include two decimal places.

page 3 of 6

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__
B6. Base (also known as Cushion or Pad) gas
Enter the base gas volume in billion standard cubic feet (BCF) and include two decimal places.
B7. Total gas capacity
The data collection software will add B5 and B6 to calculate B7 in billion standard cubic feet (BCF).
B8. Volume of natural gas withdrawn from the facility for calendar year
Enter the volume of gas withdrawn from the facility during the calendar year in billion standard cubic feet (BCF)
and include two decimal places.
B9. Volume of natural gas injected into the facility for calendar year
Enter the volume of gas injected into the facility during the calendar year in billion standard cubic feet (BCF) and
include two decimal places.
PART C – RESERVOIRS AND WELLS
Part C is completed once for each reservoir or geologic storage formation within a facility reported in Part B.
Facility Name is populated based on your entry in Part B.
C1. Reservoir Name
Enter the name used by your company to identify the reservoir or geologic storage formation.
C2. Year reservoir placed in storage service
Enter the year the reservoir or geologic storage formation was first used for storage of natural gas.
C3. Type
Select the type of reservoir or geologic storage formation for the facility. If other is selected, provide text
describing the type.
C4. Maximum Wellhead Surface Pressure
A single well at each reservoir or geologic storage facility is typically selected as an indicator well for measuring
pressure. Enter text identifying the indicator well for the reservoir or geologic storage formation in C4a. In C4b,
enter the maximum surface pressure at the indicator well in pounds per square inch gauge (psig).
Reservoir Depth
C5. Approximate Maximum Depth
Enter the approximate distance from grade to the bottom of the reservoir or geologic storage formation in feet.
C6. Approximate Minimum Depth
Enter the approximate distance from grade to the top of the reservoir or geologic storage formation in feet.
Wells
Enter the number of wells in C7 through C23 as-of the end of the calendar year.
C7. Number of Injection and/or Withdraw Wells

page 4 of 6

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__

C8. Number of Monitoring and/or Observation Wells
C9. Number of Wells drilled during the calendar year
C10. Number of Wells plugged and abandoned during the calendar year
Well Safety Valves
C11. Number of Wells with surface safety valves
C12. Number of Wells with subsurface safety valves
Well Gas Flow
C13. Number of Wells with gas flow only through production tubing.
“Production tubing” is often referred to as “tubing-on-packer.”
C14. Number of Wells with gas flow only through production casing
C15. Number of Wells with gas flow through both production tubing and production casing
“Production tubing” is often referred to as “tubing-on-packer.”
C16. Number of Wells with some “other type” of gas flow
If greater than zero, enter text explaining the “other type” of gas flow through the well.
Well Maintenance
C17. Number of Wells with new production tubing installed during the calendar year
“Production tubing” is often referred to as “tubing-on-packer.” Include wells where production tubing was
replaced during the calendar year.
C18. Number of Wells with new production casing, new liner, or repairs to casing or liner during the calendar
year
C19. Number of Wells with wellhead remediation or repair during the calendar year
C20. Number of Wells with casing, wellhead, or tubing leaks during the calendar year
Include leaks reported as incidents on form PHMSA F7100.2, “Incident Report – Natural and Other Gas
Transmission and Gathering Pipeline Systems.” A non-hazardous release that does not meet the incident
definition and can be eliminated by lubrication, adjustment, or tightening is not a leak.
In C21 through C23, report the number of wells tested, regardless of the test results.
C21. Number of Wells with Pressure Test Mechanical Integrity Tests (MIT) during the calendar year
C22. Number of Wells with Logged for Corrosion/wall loss MIT during the calendar year

page 5 of 6

Instructions (rev ??-201?) for PHMSA Form 7100.4-1 (rev ??-201?)
UNDERGROUND NATURAL GAS STORAGE FACILITY
ANNUAL REPORT FOR CALENDAR YEAR 20__

C23. Number of Wells with MIT other than “Pressure Test” and “Logged for Corrosion/wall loss” during the
calendar year
If greater than zero, enter text describing the other MIT.
PART D – CONTACT INFORMATION
In D1 through D4, enter information about the person submitting the report.
In D5 through D8, enter information about the person designated to answer technical questions about this report.

page 6 of 6