# Dikes, general.

**Citation:** 49 CFR 193.2161  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

An outer wall of a component served by an impounding system may not be used as a dike unless the outer wall is constructed of concrete.

[Amdt. 193-17, 65 FR 10959, Mar. 1, 2000]

## Document text

An outer wall of a component served by an impounding system may not be used as a dike unless the outer wall is constructed of concrete.

[Amdt. 193-17, 65 FR 10959, Mar. 1, 2000]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-193.2161>
- Source ID: `ecfr`
- SHA-256: `5e636922070c9d4fc069f8a725d8e610870fa6eabdf516c2d9acf57a76bc2662`
- Retrieved: 2026-08-20T05:54:35.243Z
- Exported: 2026-08-24T13:01:01.743Z
- Document slug: `49-cfr-193-2161`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "193",
  "section": "193.2161",
  "subpart": "Subpart C—Design",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```