Transportation Department, Pipeline and Hazardous Materials Safety Administration
PHMSA issues this advisory bulletin to remind owners and operators of gas distribution systems of the distribution integrity management program (DIMP) requirements under 49 CFR part 192, subpart P. The guidance is intended to improve implementation of DIMP risk evaluations by addressing factors such as high-risk infrastructure, interactive threats, and leak management effectiveness. In addition, the guidance urges pipeline operators to adopt the most appropriate risk models for use within their integrity management programs, with full consideration of probabilistic risk models.
Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Pipeline and Hazardous Materials Safety Administration [Docket No. PHMSA-2026-2443] AGENCY: Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation (DOT or Department). ACTION: Notice; issuance of advisory bulletin. SUMMARY: PHMSA issues this advisory bulletin to remind owners and operators of gas distribution systems of the distribution integrity management program (DIMP) requirements under 49 CFR part 192, subpart P . The guidance is intended to improve implementation of DIMP risk evaluations by addressing factors such as high-risk infrastructure, interactive threats, and leak management effectiveness. In addition, the guidance urges pipeline operators to adopt the most appropriate risk models for use within their integrity management programs, with full consideration of probabilistic risk models. FOR FURTHER INFORMATION CONTACT: Nancy White by phone at 202-923-8268 or by email at Nancy.White1@dot.gov . SUPPLEMENTARY INFORMATION: To address National Transportation Safety Board (NTSB) Safety Recommendations P-21-2 and P-26-2, PHMSA is reminding owners and operators of gas distribution systems of existing DIMP risk evaluation requirements under 49 CFR part 192, subpart P . This guidance: Emphasizes ongoing efforts to advance pipeline safety risk management and risk evaluations, including foundational concepts developed by the PHMSA-organized Risk Modeling Work Group (RMWG) and its subsequent report, which provi…
Citation: 91 FR 43015
