# Pipeline Operations - Walworth Valve Maintenance Requirements and CPEMG input to Maintenance

**Citation:** DCA17MP007 docket item 3  
**Type / status:** incident / current  
**Agency:** National Transportation Safety Board  
**Effective:** Not stated  
**Published:** Not stated

DCA17MP007; docket item 3; Adobe PDF file.

## Document text

Pipeline Operations - Walworth Valve Maintenance Requirements and CPEMG input to Maintenance DCA17MP007 docket item 3. 13 pages. 0 photograph references. Published media type: Adobe PDF file. Metadata only; the linked docket file is not mirrored.

## Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478503&FileExtension=.PDF&FileName=Pipeline%20Operations%20-%20Walworth%20Valve%20Maintenance%20Requirements%20and%20CPEMG%20input%20to%20Maintenance-Master.PDF>
- Source ID: `ntsb-dockets`
- SHA-256: `9d0c344f159d6c9a925ba3944a35e6b992ca49e15e872d4d71427132541a4ca6`
- Retrieved: 2026-08-20T04:58:09.797Z
- Exported: 2026-08-23T10:55:41.122Z
- Document slug: `ntsb-docket-item-40478503`

### Source metadata

```json
{
  "materialSubtype": "ntsb_docket_item_metadata",
  "ntsbNumber": "DCA17MP007",
  "blobId": "40478503",
  "ordinal": 3,
  "pages": 13,
  "photos": 0,
  "publishedMediaType": "Adobe PDF file",
  "fileExtension": ".PDF",
  "fileName": "Pipeline Operations - Walworth Valve Maintenance Requirements and CPEMG input to Maintenance-Master.PDF",
  "docketUrl": "https://data.ntsb.gov/Docket/?NTSBNumber=DCA17MP007",
  "tableOfContentsUrl": "https://data.ntsb.gov/Docket/TOCPrintable?data=95735",
  "docketReportedMode": "Pipeline",
  "docketCreationDate": "2019-12-04",
  "docketLastModifiedDate": "2019-12-12",
  "docketPublicReleaseDate": "2019-12-05",
  "metadataOnly": true,
  "binaryMirrored": false,
  "caveat": "Docket item metadata and official link only. The title does not establish authorship, evidentiary weight, NTSB endorsement, legal effect, or a current regulatory finding; party submissions and evidence binaries are not mirrored.",
  "jurisdiction": "US"
}
```