History of DIMP - The History of DIMP provides background on why, how and when the DIMP regulation was developed and promulgated. All documents referenced in the document are accessible below.

Documents Leading to DIMP Rule Development:

• Department of Transportation (DOT) Investigator General (IG) Report; Actions Taken and Needed for Improving Pipeline Safety (2004)

• PHMSA and NAPSR joint petition to the Gas Piping Technology Committee (GPTC) (2006)

• Assuring the Integrity of Gas Distribution Pipeline Systems: A Report to Congress on May 2005

• DIMP Integrity Management for Gas Distribution: Report of Phase 1 Investigations(2005)

• Safety Incidents on Natural Gas Distribution Systems: Understanding the Hazards (2005) 

• Safety Performance and Integrity of the Natural Gas Distribution Infrastructure, American Gas Foundation (AGF) Study(2004)

DIMP Federal Register Notices:

• Integrity Management Program for Gas Distribution Pipelines for Notice of Proposed Rulemaking (2008)

• Extension of Comment Period DIMP NPRM (2008)

• Integrity Management Program for Gas Distribution Pipelines Final Rule (2009)

• Extension of comment period for compression coupling failure reporting and annual report information collection, OMB Control Number 2137-0522 (2009)

• Correction for the Integrity Management Program for Gas Distribution Pipelines (2010)

• Information Collection Gas Distribution Annual Report Form (2010)

• Mechanical Fitting Failure Reporting Requirements (2011)

DIMP Laws:

• Pipeline Safety, Regulatory Certainty, and Job Creation Act of 2011

• Pipeline Inspection, Enforcement, and Protection Act of 2006 (PIPES)