# SOUTHWEST GAS CORP — Gas distribution annual report (2022)

**Citation:** PHMSA Annual Report 20231072 (2022)  
**Type / status:** inspection / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2022-12-31

Gas distribution; reporting year 2022; NV; Natural Gas. Operator-reported infrastructure data.

## Document text

Gas distribution annual report for reporting year 2022, submitted by SOUTHWEST GAS CORP (operator 18536). Reported scope: NV; Natural Gas. Represented states: NV. Selected reported fields: mmiles total: 9343.272; mmiles 2in to 4in total: 1688.834; mmiles 4in to 8in total: 501.327; mmiles 8in to 12in total: 74.544; mmiles by dcd total: 9343.272; mmiles gt12in total: 65.959; mmiles lt2in total: 7012.608; mmiles part b2 total: 9343.272; mmiles pe total: 8657.716; mmiles plastic total: 25.775; mmiles steel total: 659.781; num srvcs total: 698846; num srvs 1in to 2in total: 6738; num srvs 2in to 4in total: 226; num srvs 4in to 8in total: 12; num srvs by dcd total: 698846; num srvs lt1in total: 691870; num srvs part b3 total: 698846; num srvs pe total: 694818; num srvs plastic total: 2349; num srvs steel total: 1679; total hazleaks cor mains: 4; total hazleaks cor srvs: 48; total hazleaks eq mains: 12; total hazleaks eq srvs: 147; total hazleaks ex mains: 48; total hazleaks ex srvs: 222; total hazleaks mat weld mains: 18; total hazleaks mat weld srvs: 43; total hazleaks nf mains: 8. The sortable date is the reporting-period end, not the operator submission date.

## Provenance

- Official: Yes
- Source: <https://data.transportation.gov/d/aemm-7pyq>
- Source ID: `phmsa-annual-reports`
- SHA-256: `b82c5a403f6a625c8971069bd4ade7a5b2ba491c60929faba757b20bf5eccccf`
- Retrieved: 2026-08-13T02:59:50.318Z
- Exported: 2026-08-26T18:46:05.119Z
- Document slug: `phmsa-annual-925c311f5973dea34099afb7`

### Source metadata

```json
{
  "materialSubtype": "phmsa_pipeline_annual_report",
  "dataset": "gas_distribution",
  "reportYear": 2022,
  "reportNumber": "20231072",
  "supplementalNumber": "51717",
  "sourceFormat": "modern_xlsx",
  "operator": {
    "id": "18536",
    "name": "SOUTHWEST GAS CORP"
  },
  "region": "NV",
  "commodity": "Natural Gas",
  "representedStates": [
    "NV"
  ],
  "jurisdictionClasses": [],
  "facilities": [],
  "metrics": {
    "MMILES_TOTAL": 9343.272,
    "MMILES_2IN_TO_4IN_TOTAL": 1688.834,
    "MMILES_4IN_TO_8IN_TOTAL": 501.327,
    "MMILES_8IN_TO_12IN_TOTAL": 74.544,
    "MMILES_BY_DCD_TOTAL": 9343.272,
    "MMILES_GT12IN_TOTAL": 65.959,
    "MMILES_LT2IN_TOTAL": 7012.608,
    "MMILES_PART_B2_TOTAL": 9343.272,
    "MMILES_PE_TOTAL": 8657.716,
    "MMILES_PLASTIC_TOTAL": 25.775,
    "MMILES_STEEL_TOTAL": 659.781,
    "NUM_SRVCS_TOTAL": 698846,
    "NUM_SRVS_1IN_TO_2IN_TOTAL": 6738,
    "NUM_SRVS_2IN_TO_4IN_TOTAL": 226,
    "NUM_SRVS_4IN_TO_8IN_TOTAL": 12,
    "NUM_SRVS_BY_DCD_TOTAL": 698846,
    "NUM_SRVS_LT1IN_TOTAL": 691870,
    "NUM_SRVS_PART_B3_TOTAL": 698846,
    "NUM_SRVS_PE_TOTAL": 694818,
    "NUM_SRVS_PLASTIC_TOTAL": 2349,
    "NUM_SRVS_STEEL_TOTAL": 1679,
    "TOTAL_HAZLEAKS_COR_MAINS": 4,
    "TOTAL_HAZLEAKS_COR_SRVS": 48,
    "TOTAL_HAZLEAKS_EQ_MAINS": 12,
    "TOTAL_HAZLEAKS_EQ_SRVS": 147,
    "TOTAL_HAZLEAKS_EX_MAINS": 48,
    "TOTAL_HAZLEAKS_EX_SRVS": 222,
    "TOTAL_HAZLEAKS_MAT_WELD_MAINS": 18,
    "TOTAL_HAZLEAKS_MAT_WELD_SRVS": 43,
    "TOTAL_HAZLEAKS_NF_MAINS": 8
  },
  "dependentRowsBySheet": {},
  "dataAsOf": "2026-02-02T07:27:17.000Z",
  "reportingPeriodEnd": "2022-12-31",
  "dateBasis": "calendar_year_end_not_submission_date",
  "provenance": {
    "archive": "annual_gas_distribution_2010_present.zip",
    "archiveSha256": "5a1422d800e6839d1dcacc2e9f1b24fc34371ef78f4cb8ffc53872eeeadfca1a",
    "workbook": "annual_gas_distribution_2022.xlsx",
    "sheet": "GD AR 2022",
    "rowNumber": 941,
    "sourceRowNumbers": [
      941
    ],
    "rowSha256": "2609784c65fcfddeb8e41e44c4b76fe6eb70771350c52f3df7a59a400bb0e621"
  },
  "caveat": "Operator-reported annual infrastructure data may be corrected. The indexed date is the reporting-period end, not the submission date, and the record is not an agency finding about current facility condition.",
  "jurisdiction": "US",
  "operatorName": "SOUTHWEST GAS CORP"
}
```