# COLUMBIA GAS OF MARYLAND INC — Washington County, MD

**Citation:** NPMS FIPS 24043 / OPID 2588  
**Type / status:** inspection / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2026-07-16

5.172528 active Natural Gas pipeline miles in Washington County, MD; public NPMS snapshot 2026-07-16.

## Document text

COLUMBIA GAS OF MARYLAND INC (PHMSA OPID 2588) reported 5.172528 active Natural Gas pipeline miles in Washington County, MD (county FIPS 24043) in the public NPMS summary snapshot dated 2026-07-16. The snapshot includes active assets only and excludes permanently abandoned assets. Exact pipeline locations and restricted NPMS GIS data are not included.

## Provenance

- Official: Yes
- Source: <https://www.npms.phmsa.dot.gov/Documents/NPMS_Active_Pipe_County_Mileage.xlsx>
- Source ID: `npms-public-summaries`
- SHA-256: `349ab0e15a9a352fd67077cb1f73631cc7dd4c1086f32ef89a4028403cf448d7`
- Retrieved: 2026-08-20T04:38:11.081Z
- Exported: 2026-08-26T11:33:06.389Z
- Document slug: `npms-mileage-ce6a4c59ded8074175ca85d5`

### Source metadata

```json
{
  "materialSubtype": "pipeline_mileage",
  "dataAsOf": "2026-07-16",
  "dateBasis": "data_as_of_not_publication_date",
  "fips": "24043",
  "stateFips": "24",
  "state": "MD",
  "county": "Washington County",
  "region": "Washington County, MD",
  "operator": {
    "id": "2588",
    "name": "COLUMBIA GAS OF MARYLAND INC"
  },
  "commodity": "Natural Gas",
  "mileage": 5.17252843,
  "plantCount": null,
  "snapshotScope": "active_assets_only",
  "personalContactDataExcluded": true,
  "restrictedGisExcluded": true,
  "provenance": {
    "workbook": "pipeline_mileage",
    "sheet": "Summary - Cnty, Oper, Commodity",
    "rowNumber": 5518,
    "rowSha256": "1c9cedbe109016a592bbb1c6eeef1a9e3dacb510175f13facf1589cf460d68a1"
  },
  "citedSections": [
    "191.29"
  ],
  "caveat": "Public aggregate snapshot only. It is not a complete representation of exact pipeline locations, may be updated, and is not an agency finding about facility condition.",
  "jurisdiction": "US",
  "operatorName": "COLUMBIA GAS OF MARYLAND INC"
}
```