Washington DC, Northern Virginia and Baltimore natural gas winter stress record: neither is rated

By Sam Strong, Vice President of Business Development, Discovery Energy. Technical review by Tara Dugger, Chief Operating Officer. Published November 2, 2026.

Metro used: two metropolitan statistical areas, as the federal government defines them in OMB Bulletin No. 23-01 (July 21, 2023): Washington-Arlington-Alexandria, referred to here as Washington DC including Northern Virginia, and Baltimore-Columbia-Towson. They share one pipeline record, Columbia Gas Transmission, LLC ("Columbia") Operating Area 10, so they share this page, each with its own section and map. The serving gas utilities are Washington Gas Light Company ("Washington Gas") and Baltimore Gas and Electric Company ("BGE"), with Columbia Gas of Virginia, Inc. ("Columbia Gas of Virginia") serving part of Northern Virginia. The Columbia notices cover one of several pipelines serving the two metros.¹

Key takeaways

Why these two metros are not rated

Neither metro has a public supply-versus-demand balance for a current year, so neither is rated. We rate a metro only when a public source gives that balance. Neither Washington Gas nor BGE publishes one in the records reviewed: the tariffs describe how capacity is assigned to customers, not how it compares with a design day. The only margin figure found for Washington Gas is for winter 2018-19 and is too old to rate. If either utility states its design day margin in writing, or a filing gives one, its metro can be rated at the next update.³

Who serves each metro?

The pipeline notices on this page were matched to each metro through the delivery points that pipelines name for the serving utilities. Washington DC including Northern Virginia is served by Washington Gas, and in part by Columbia Gas of Virginia. It sits in Columbia's Conowingo and Rockville market areas, in the Washington-Baltimore operating area and in Transco zones 5 and 6. Columbia names delivery points for Washington Gas and Columbia Gas of Virginia, and Transco lists Washington Gas delivery points in zone 5 and zone 6. Baltimore is served by BGE. It sits in Columbia's Conowingo market area, in the Washington-Baltimore operating area and in Transco zone 6. Columbia names a delivery point for BGE, and Transco lists a BGE delivery point in zone 6. We made these matches from Columbia's market area and operating area descriptions and its locations report, and from the Transco locations list.³³ The Virginia/Maryland operating area consists of Conowingo, Rockville and Charlottesville market areas.² The counts below describe two pipelines, Columbia and Transco. Washington Gas also buys gas from Eastern Gas Transmission and Storage, and BGE connects to it, but that pipeline's postings were not reached, so the counts describe only part of the supply for either metro and may understate or overstate their exposure.⁶

The escalation ladders: pipeline and utility

Both the pipeline and the utilities have a sequence of steps they can take as conditions tighten. Columbia's notices show a sequence of operational alerts, pre-operational flow order warnings, flow orders for receipt points, and then transport critical days for named operating areas. The "critical days" counted on this page are the last step, and each carries a tariff penalty for takes above firm entitlement.² Washington Gas's tariffs describe its own sequence. In Maryland a System Alert comes first and may lead to an operational flow order. The District of Columbia tariff sets a $25 per dth (dekatherm, a unit of gas energy) penalty for suppliers not complying with an operational flow order and lets Washington Gas declare a Critical Day without notice, with a $50 per dth penalty for under-delivery on such a day. The Maryland tariff's emergency provision covers a case where the company's peak day supply proves insufficient, and the Virginia tariff provides for an Essential Human Needs Emergency. This is what the tariffs say; no declaration of any of these steps was searched for or counted.³ BGE's supplier tariff sets a $25.00 per Dth penalty for noncompliance with an operational flow order, issued by 9:00 a.m. Its Schedule IS defines a Gas Production Day, one on which the company anticipates peak shaving. Its curtailment plan first discontinues supply under Schedules IS, EG and ISS and special contracts and last under Schedule D, with a $100 per Dth penalty for not complying with curtailment notices. Tariff exposure is described here; no penalty is shown assessed.⁷

Winter by winter: distinct critical-day events in Operating Area 10

Columbia's critical days in Operating Area 10 rose from 24 gas days in winter 2023-24 to 55 in winter 2025-26.² The area covers both metros, so the counts are the same for both. A winter is 1 November to 31 March. An event is one run of transport critical-day status for the operating area; the day it is lifted does not count. Storage critical days carry the same dates and are counted as the same events. Routine operational alerts and capacity postings are left out of the events. We counted the events from Columbia's critical notices posted October 2023 to October 2026.²⁹

Critical-day events and gas days in Columbia's Washington DC and Baltimore operating area, by winter.²

The episodes behind these counts:

Each episode of critical days that named the Virginia/Maryland operating area. Start and lift are the first and last gas days of the episode for the area.⁸

Transco imbalance orders, shown separately

Transco's imbalance orders are a different measure from Columbia's critical days, and the two counts are not added. Transco's notices say they do not affect delivery of scheduled gas.⁴

Transco imbalance order runs (OFO runs) and the days covered (OFO days), by zone and winter.⁹

In 2025-26 Transco issued many short notices, so run counts differ in character from earlier winters.³⁰

Transco also posted force majeure notices (emergency outage or repair notices) limiting primary firm transportation through Station 517 on its Leidy line from December 2025 and through Station 115 in February 2026. The notices do not state whether either reached the delivery points of these metros.¹⁰ Transco posted four cold-weather operational alerts for its whole pipeline system in the three winters.¹¹

Other Columbia events naming these areas

Columbia also posted force majeure and flow order notices that named market areas serving these metros. The notices do not say whether any customer service was affected.

Columbia force majeure and flow order events that named market areas serving these metros, with the first and last notice for each.⁸

Documented local constraints

Columbia offered no non-firm capacity at several points that deliver gas to these metros on many winter days. Columbia's daily capacity postings show whether it was available through named internal constraints, and zero means Columbia offered none through that point that gas day. Zero non-firm availability occurred on days with no critical day, so it is a cold-season condition and not the same measure as a critical day.¹²

Gas days with zero non-firm capacity at Columbia constraint points serving these metros, out of the gas days counted, by winter; summer means June to August.¹³

Rutledge South is a receipt constraint at zero in every season, so for it zero is the standing condition. Days that could not be parsed are left out of the counts.³¹

Weather against normal

Winter 2023-24 was the mildest of the three at all three stations and 2025-26 the coldest at Reagan National and BWI, yet Columbia declared critical days for Operating Area 10 in all three winters. Three winters are not enough to separate weather from how Columbia chose to use critical days.¹⁴

Heating degree days (a measure of how cold it was), November to March, as a share of the 1991-2020 normal, for the airport weather stations. Source: NOAA ACIS.⁵

NOAA's three-month temperature outlook for each metro, issued October 15, 2026, is given in the section for that metro below.¹⁵

Firm contract end dates, and what they do not show

A contract end date is not the end of service. Columbia's own capacity report assumes all right-of-first-refusal (ROFR) rights are exercised indefinitely, so a contract with that right may be renewed. Each pipeline's Index of Customers lists each utility's firm contracts with end dates. The table sums transport contracts that had not passed their primary term on October 27, 2026, by the year the term ends. It does not measure any utility's total firm supply, because storage held on other pipelines, agent-held contracts and Eastern Gas Transmission and Storage capacity are not in it.¹³

Firm transport contracts held by each utility on Columbia and Transco, in Dth per day, by the year the contract term ends.¹⁶

Columbia Gas of Virginia's contracts serve its whole system, not only Northern Virginia.³²

New large gas loads

We found one planned gas-fired unit in the Washington metro's counties, none planned in the Baltimore counties, and no data center gas volume for either metro. The U.S. Energy Information Administration (EIA) monthly generator inventory (September 2026 release) lists one planned gas-fired unit in the counties of the Washington metro, a combustion turbine at a combined heat and power plant in the District of Columbia, and four canceled or postponed units, and none planned in the Baltimore counties.¹⁷ Data centers: As of October 28, 2026, no data center with on-site gas generation appears in the EIA inventory for either metro, and our search of official records found no gas data center load for Baltimore.¹⁹ A report of eight gas turbines at a Loudoun County data center was read on a web page and not saved, so it is not shown. A presentation to Virginia's Joint Legislative Audit and Review Commission says Northern Virginia has the highest concentration of data centers globally; it concerns electric demand, and no gas volume for it is in the records reviewed.¹⁸ Nearby: AltaGas Ltd. said in March and April 2026 that it signed agreements tied to data centers in Maryland; neither statement gives a gas volume, so we do not treat them as gas load on Washington Gas's system.²⁰

Policy context

No Maryland, Virginia or District of Columbia policy, order or rule specific to natural gas service for large new loads was found in the official sources reviewed, so none is described here. Commission dockets for Washington Gas and BGE could not be reached by automated download.⁶

Washington DC including Northern Virginia

This metro is matched to Columbia's market areas 28 and 30, the operating area for Washington DC and Baltimore, because Columbia lists delivery points named for Washington Gas in both and one for Columbia Gas of Virginia in market area 30.¹³ Its Columbia critical-day record is the Washington DC and Baltimore record above.²² Two Columbia constraints in market area 30 appear in notices for this metro: a force majeure on Line VB near Strasburg, Virginia, and an operational flow order on deliveries served through the Lost River compressor station constraint, lifted January 23, 2024.²³ The Lost River constraint was at zero non-firm availability on most winter days.²⁴ Washington Gas is the main serving utility and Columbia Gas of Virginia serves part of Northern Virginia. Washington Gas's tariffs in the District, Maryland and Virginia describe design-day-based capacity assignment and emergency provisions, but no volume.⁷ The public record doesn't show these things for this metro: a current design-day margin (supply compared with demand on the design day); Eastern Gas Transmission and Storage supply; a Columbia Gas of Virginia design day; the share of Washington Gas supply from each pipeline; and any local gas load from data centers. A 2018-19 Washington Gas design-day margin was read on a web page and not saved; it is eight winters old and too old to rate.⁶ For Washington DC including Northern Virginia, NOAA's Climate Prediction Center outlook issued October 15, 2026 gives 40.0% above normal, 33.3% near normal and 26.7% below normal for both November 2026 to January 2027 and December 2026 to February 2027; these are NOAA's probabilities for a three-month average temperature, not a forecast of specific days or of an outage.²⁵

Baltimore

Baltimore is matched to market area 28, the operating area for Washington DC and Baltimore, because Columbia lists a delivery point named for BGE there.²⁴ Its Columbia critical-day record is the Washington DC and Baltimore record above.²⁶ Transco zone 6 covers BGE's delivery point; the imbalance order counts for zone 6 are in the table above.¹¹ Market area 28 holds two Columbia constraints that were at zero non-firm availability on most winter days, Loudoun and Rutledge North, and a receipt constraint, Rutledge South, at zero in every season; a force majeure on Line 1804 in February 2025 named market areas 22, 23, 24 and 28 (table above).²⁶ BGE's tariffs describe a design-day-based assignment and a curtailment order, with no supply volume.⁷ No design-day demand, peak-day volume or portfolio table is in any BGE document reviewed. The public record doesn't show these things for Baltimore: BGE's design day or supply total for a current year; its Eastern Gas Transmission and Storage supply; the number of times BGE issued its own operational flow orders or Gas Production Days; and any local gas load from new generation.⁶ For Baltimore, NOAA's Climate Prediction Center outlook issued October 15, 2026 gives 40.0% above normal, 33.3% near normal and 26.7% below normal for both November 2026 to January 2027 and December 2026 to February 2027; these are NOAA's probabilities for a three-month average temperature, not a forecast of specific days or of an outage.²⁷

What's new (as of October 28, 2026)

No filing dated in the past 90 days was found for Baltimore that changes its gas record. On its second-quarter 2026 results call, released July 30, 2026, AltaGas said two data center pipeline connection projects in Virginia and Maryland remain on schedule for completion in the fourth quarter of 2026. A federal notice of August 12, 2026 on an environmental assessment describes the Mountain Valley Boost project as an interstate expansion of about 600,000 dekatherms of service, which we do not link to either metro.²⁸

What should facilities in these metros check now?

• Tariffs and charges, through a utility audit. Confirm each account is on the right rate class and tariff, and that riders, demand charges and capacity-related charges are billed correctly. Over 70% of the clients Discovery Energy has audited were billed incorrectly. An audit verifies tariffs and charges and recovers overcharges before winter costs rise.
• Which utility, pipeline and rate. Confirm which utility serves each site and its interruption and balancing terms, because the notices reviewed name pipelines and market areas, not utilities.
• Backup plans and fuel. Check that alternate-fuel and curtailment plans are current and feasible, and that fuel inventories and resupply arrangements are in place before December.
• Upcoming records. Track each utility's design day statements and any supply plan filing, which would allow a rating.

Frequently asked questions

Related case studies

Discovery Energy publishes gas capacity case studies for other metros, using the same method and outlook scale.

• Detroit natural gas capacity case study (outlook: High)

All gas capacity ratings by U.S. metro

Notes

1. Metro delineation: OMB Bulletin No. 23-01 (July 21, 2023), as carried in the project's metro list. The federal definition is Office of Management and Budget Bulletin No. 23-01 (July 21, 2023). The Washington-Arlington-Alexandria counties are the District of Columbia; Charles, Frederick, Montgomery and Prince George's counties in Maryland; Arlington, Clarke, Culpeper, Fairfax, Fauquier, Loudoun, Prince William, Rappahannock, Spotsylvania, Stafford and Warren counties and the cities of Alexandria, Fairfax, Falls Church, Fredericksburg, Manassas and Manassas Park in Virginia; and Jefferson County in West Virginia. The Baltimore-Columbia-Towson counties are Anne Arundel, Baltimore, Carroll, Harford, Howard and Queen Anne's counties and Baltimore city, Maryland.
2. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. Notice cited for the 2025-26 count of 55 gas days in the summary line, key takeaway 2 and the winter-by-winter section: Columbia Gas Transmission, LLC, Capacity Constraint Notice 25980112, February 20, 2026. The notices do not say which utilities or customers were affected. ↩
3. Washington Gas, BGE and Columbia Gas of Virginia tariffs and filings:. Utility statements are the utilities' own; no regulator finding is shown on this page. ↩
4. Transcontinental Gas Pipe Line Company, LLC, critical notices and Index of Customers on the Williams 1Line site, public postings downloaded October 27, 2026; facts are paraphrased and counts and tables are Discovery Energy's own. The notices say the imbalance orders do not affect delivery of scheduled gas. No verbatim Transco text is used. Notice dates are posting dates. Notices cited in key takeaway 3: zone 6, Transcontinental Gas Pipe Line Company, LLC, Operational Flow Order Notice 16225021, November 6, 2025; zone 5, Transcontinental Gas Pipe Line Company, LLC, Operational Flow Order Notice 16336705, December 11, 2025. ↩
5. NOAA Applied Climate Information System, monthly heating degree days base 65F and 1991-2020 normals for the Reagan National, Dulles and Baltimore-Washington airport stations; computed. ↩
6. Records not found or not reached: Washington Gas and BGE design-day demand and firm supply for a current year; Eastern Gas Transmission and Storage notices and Index of Customers (the site's disallows automated access); Maryland PSC dockets (the system returned an error to automated downloads); Virginia SCC and DC PSC dockets; a Washington Gas figure for 2018-19 that was read on a web page and not saved; BGE's current supply plan; notices of other pipelines serving the metros; and any gas-side policy for large loads. ↩
7. Washington Gas, BGE and Columbia Gas of Virginia tariffs and filings:. Utility statements are the utilities' own; no regulator finding is shown on this page. ↩
8. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. ↩
9. Transcontinental Gas Pipe Line Company, LLC, critical notices and Index of Customers on the Williams 1Line site, public postings downloaded October 27, 2026; facts are paraphrased and counts and tables are Discovery Energy's own. The notices say the imbalance orders do not affect delivery of scheduled gas. No verbatim Transco text is used. Notice dates are posting dates. ↩
10. Transcontinental Gas Pipe Line Company, LLC, critical notices and Index of Customers on the Williams 1Line site, public postings downloaded October 27, 2026; facts are paraphrased and counts and tables are Discovery Energy's own. The notices say the imbalance orders do not affect delivery of scheduled gas. No verbatim Transco text is used. Notice dates are posting dates. Notices cited for the force majeure through Station 517 and Station 115: Transcontinental Gas Pipe Line Company, LLC, Force Majeure Notice 16347263, December 14, 2025 (Station 517); Transcontinental Gas Pipe Line Company, LLC, Force Majeure Notice 16544208, February 8, 2026 (Station 115). ↩
11. Transcontinental Gas Pipe Line Company, LLC, critical notices and Index of Customers on the Williams 1Line site, public postings downloaded October 27, 2026; facts are paraphrased and counts and tables are Discovery Energy's own. The notices say the imbalance orders do not affect delivery of scheduled gas. No verbatim Transco text is used. Notice dates are posting dates. Notices for the four cold-weather operational alerts: Transcontinental Gas Pipe Line Company, LLC, Operational Alert Notice 14227183, January 11, 2024; Transcontinental Gas Pipe Line Company, LLC, Operational Alert Notice 15220754, December 18, 2024; Transcontinental Gas Pipe Line Company, LLC, Operational Alert Notice 16336722, December 11, 2025; Transcontinental Gas Pipe Line Company, LLC, Operational Alert Notice 16455061, January 15, 2026. ↩
12. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. ↩
13. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. ↩
14. NOAA Applied Climate Information System, monthly heating degree days base 65F and 1991-2020 normals for the Reagan National, Dulles and Baltimore-Washington airport stations; computed; Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. ↩
15. NOAA Climate Prediction Center, official 90-day temperature outlook issued October 15, 2026 (GIS shapefiles; the favored category at the metro's principal county); the favored category's probability is NOAA's labelled value for the area, and the other two categories follow NOAA's published convention for the 3-class outlook maps, computed. []. ↩
16. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012; Transcontinental Gas Pipe Line Company, LLC, critical notices and Index of Customers on the Williams 1Line site, public postings downloaded October 27, 2026; facts are paraphrased and counts and tables are Discovery Energy's own. The notices say the imbalance orders do not affect delivery of scheduled gas. No verbatim Transco text is used. Notice dates are posting dates. ↩
17. U.S. Energy Information Administration, Form EIA-860M, September 2026 release, gas-fired units in the counties of the two metros, counted; Joint Legislative Audit and Review Commission presentation. ↩
18. U.S. Energy Information Administration, Form EIA-860M, September 2026 release, gas-fired units in the counties of the two metros, counted; Joint Legislative Audit and Review Commission presentation. ↩
19. Discovery Energy data center scan log, October 28, 2026; a search that finds nothing does not prove that no project exists. ↩
20. AltaGas Ltd., Q4 and full year 2025 results news release (2026-03-06), Q4 2025 results release, utilities section; AltaGas Ltd., Q1 2026 Financial Report (MD&A) (2026-04-30), Q1 2026 report, Utilities section. AltaGas said in its results release of March 6, 2026 that it executed an agreement for infrastructure for the first phase of a 24 megawatt data center in Maryland, and said on April 30, 2026 that a second agreement is for back-up power generation at an existing 15 megawatt data center. ↩
21. AltaGas Ltd., Q4 and full year 2025 results news release (2026-03-06), Q4 2025 results release, utilities section.
22. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. Notice cited for the 24, 34 and 55 gas days in the Washington DC section: Columbia Gas Transmission, LLC, Capacity Constraint Notice 25980112, February 20, 2026. ↩
23. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. Notices cited for the Line VB force majeure and the Lost River operational flow order: Columbia Gas Transmission, LLC, Operational Flow Order Notice 25891210, January 12, 2024 (Line VB); Columbia Gas Transmission, LLC, Operational Flow Order Notice 25891244, January 22, 2024 (Lost River). ↩
24. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. ↩
25. NOAA Climate Prediction Center, official 90-day temperature outlook issued October 15, 2026 (GIS shapefiles; the favored category at the metro's principal county); the favored category's probability is NOAA's labelled value for the area, and the other two categories follow NOAA's published convention for the 3-class outlook maps, computed; NOAA Climate Prediction Center, official 90-day temperature outlook issued October 15, 2026 (GIS shapefiles; the favored category at the metro's principal county); the favored category's probability is NOAA's labelled value for the area, and the other two categories follow NOAA's published convention for the 3-class outlook maps, computed. []. ↩
26. Columbia Gas Transmission, LLC, critical notices on TC eConnects, posted September 27, 2023 to October 27, 2026; market area and operating area descriptions, locations report, daily capacity postings and Index of Customers. Manual browser downloads, October 26 and 27, 2026. The operating area descriptions are dated December 14, 2012. Notice cited for the 24, 34 and 55 gas days in the Baltimore section: Columbia Gas Transmission, LLC, Capacity Constraint Notice 25980112, February 20, 2026. ↩
27. NOAA Climate Prediction Center, official 90-day temperature outlook issued October 15, 2026 (GIS shapefiles; the favored category at the metro's principal county); the favored category's probability is NOAA's labelled value for the area, and the other two categories follow NOAA's published convention for the 3-class outlook maps, computed; NOAA Climate Prediction Center, official 90-day temperature outlook issued October 15, 2026 (GIS shapefiles; the favored category at the metro's principal county); the favored category's probability is NOAA's labelled value for the area, and the other two categories follow NOAA's published convention for the 3-class outlook maps, computed. []. ↩
28. AltaGas Ltd., Q2 2026 results call transcript (2026-07/08 (Q2 call; release 2026-07-30)), transcript, prepared remarks on data centre pipeline connection projects; FERC / Federal Register, Notice of Availability of EA, Mountain Valley Pipeline Boost Project (2026-16435), FERC Docket CP26-14-000 per news search; docket text not confirmed in saved notice (2026-08-12), Federal Register notice of availability of EA, Vol. 91 No. 154, summary; Discovery Energy data center scan log, October 28, 2026; a search that finds nothing does not prove that no project exists. ↩
29. Distinct events counted by Discovery Energy from Columbia's critical notices posted October 2023 to October 2026. The Virginia/Maryland operating area covers both metros, so the counts are identical for both. ↩
30. Runs of imbalance operational flow order coverage and the days covered, counted by Discovery Energy from Transco notices posted October 2023 to March 2026. Some orders ended on a terminating notice and some are closed by the next order where the export holds no terminating notice. ↩
31. Counted by Discovery Energy from Columbia Gas Transmission, LLC, Operationally Available Capacity postings, TC eConnects, accessed October 26, 2026; unparsed days are excluded. The denominator is the parsed gas days. ↩
32. Contracts listed under each utility's name as shipper in Columbia Gas Transmission, LLC, Index of Customers, and Transcontinental Gas Pipe Line Company, LLC, Index of Customers, quarter beginning October 1, 2026, accessed October 27, 2026; Dth per day; tabulated by Discovery Energy (Columbia list regex-parsed, not hand-checked). ↩
33. Transcontinental Gas Pipe Line Company, LLC, Index of Customers and location data, accessed October 27, 2026. ↩
34. Discovery Energy data center scan log, October 28, 2026; a search that finds nothing does not prove that no project exists.

Sources

1. Columbia Gas Transmission, LLC, critical notices, market area and operating area descriptions, locations report, daily capacity postings, unsubscribed capacity report and Index of Customers, TC eConnects, saved October 26 and 27, 2026.
2. Transcontinental Gas Pipe Line Company, LLC, critical notices, location data and Index of Customers, Williams 1Line information postings, accessed October 27, 2026. Link
3. Washington Gas Light Company, tariffs for the District of Columbia, Maryland and Virginia. Link
4. Baltimore Gas and Electric Company, Gas Supplier Tariff, Schedule IS and curtailment plan. Link
5. NOAA Applied Climate Information System, monthly heating degree days. Link
6. U.S. Energy Information Administration, Form EIA-860M, September 2026 release. Link
7. Office of Management and Budget, OMB Bulletin No. 23-01, Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, July 21, 2023.
8. NOAA Climate Prediction Center, official 90-day temperature outlook, GIS data, issued October 15, 2026, saved October 28, 2026. Link
9. Data center scan records saved October 28, 2026 (AltaGas Ltd., Delaware and West Virginia agencies, Federal Register and others) are listed in the Notes.

Sources: Discovery Energy compilation from public FERC-required pipeline operational notices, capacity reports, and Indexes of Customers postings as published by the interstate pipelines serving this metro, and from public gas-utility documents. Discovery Energy is not affiliated with, endorsed by, or sponsored by any pipeline, utility, or regulator named on this page. All trademarks and names remain the property of their respective owners. Counts, summaries, tables, and charts are original Discovery Energy compilations; readers should verify against the cited notices. Data current as of October 27, 2026. For information only and not a guarantee of future pipeline operations, capacity, or pricing. - NOAA Climate Prediction Center, official 90-day temperature outlook, GIS data, issued October 15, 2026, saved October 28, 2026. https://www.cpc.ncep.noaa.gov/products/GIS/GIS_DATA/us_tempprcpfcst/seasonal.php - Data center scan records saved October 28, 2026 (AltaGas Ltd., Delaware and West Virginia agencies, Federal Register and others) are listed in the Notes.