batch_auto_20260713 202607131256465730 BOEM ESP geoESPIS ESPIS@boem.gov Bureau of Ocean Energy Management Pipeline Gas Release Frequency, Scenarios, and Impacts? ABSG Consulting, Inc. ABSG Consulting, Inc. This report evaluates the threats, vulnerabilities, and risks associated with potential natural gas pipeline releases in the Alaska Outer Continental Shelf (OCS). Through literature review and analysis of historical natural gas pipeline release data from the Gulf of America and Pacific OCS regions, the study examines how traditional pipeline risks intersect with unique Alaska environmental conditions. The research synthesizes technical information on release frequency, spatial and temporal patterns, and consequences of natural gas pipeline releases, with particular focus on fire, explosion, and toxic gas exposure hazards. Analysis of Pipeline and Hazardous Materials Safety Administration (PHMSA) data reveals that while equipment failure and corrosion remain primary causes of releases, Alaska-specific factors like low temperatures, ice forces, and permafrost thaw create additional failure mechanisms. These include weather patterns, low temperature effects on materials and human performance, ice-related hazards, and unique seabed deformation processes. The research evaluates potential impacts across resource categories, ranging from physical resources like air and water quality to biological resources and sociocultural and socioeconomic considerations. The findings indicate that while some Gulf-based risk factors decrease in relevance for Alaska operations, different challenges emerge that require specialized design approaches and operational protocols. To quantify these risks, the study employs two complementary modeling approaches. These models are integrated with a qualitative assessment framework evaluating impacts across 12 resource categories ranging from physical and biological resources to sociocultural and socioeconomic considerations. 200566 U.S. Department of the Interior, Bureau of Ocean Energy Management, Environmental Studies Program https://doi.org/10.13039/100012475 M0123P0010 10.67297/9A1EE0 https://boem.gov/awardpages/100448