"HOLLY ENERGY PARTNERS - OPERATING, L.P."

Incident Narrative

"ON DECEMBER 3, 2025, AT APPROXIMATELY 11:26 P.M. CENTRAL TIME, WHILE A CONTRACTOR WAS EXCAVATING IN RESPONSE TO A PREVIOUSLY DISCOVERED RELEASE ON THE ADJACENT X-6 PIPELINE, EXCAVATION ACTIVITIES INADVERTENTLY STRUCK THE IN-SERVICE 8-INCH PIPELINE, PUNCTURING THE PIPE WALL AND CAUSING DIESEL TO SPRAY ONTO THE RIGHT-OF-WAY. AT THE TIME OF THE DAMAGE, THE 8-INCH PIPELINE WAS PRESSURIZED BUT NOT FLOWING, AS IT HAD BEEN SHUT DOWN EARLIER IN RESPONSE TO THE RELEASE ON THE ADJACENT PIPELINE. A MANUAL VALVE LOCATED NEAR THE RELEASE SITE WAS CLOSED, AND VALVES AT THE ABILENE TERMINAL WERE OPENED TO RELIEVE PRESSURE INTO TERMINAL TANKS AND MITIGATE THE RELEASE. THE CONTRACTOR HAD COMPLIED WITH THE ONE-CALL NOTIFICATION PROCESS AND HAD SUBMITTED A LOCATE REQUEST EARLIER THAT DAY (TICKET NO. 2583754370). THE CONTRACTOR HAD PREVIOUSLY EXPOSED WHAT WAS BELIEVED TO BE THE IN-SERVICE 8-INCH PIPELINE USING HYDROVAC EXCAVATION. INITIAL FINDINGS INDICATE THAT THE LINE PREVIOUSLY IDENTIFIED AS THE IN-SERVICE PIPELINE WAS INSTEAD AN ABANDONED WATERLINE LOCATED IN CLOSE PROXIMITY WITHIN THE SAME RIGHT-OF-WAY. DEFENSIVE AND CONTAINMENT MEASURES WERE IMPLEMENTED IMMEDIATELY. VACUUM TRUCKS WERE UTILIZED TO RECOVER RELEASED PRODUCT, AND AIR MONITORING EQUIPMENT, ALREADY IN PLACE DUE TO THE EARLIER INCIDENT, WAS USED TO MONITOR ATMOSPHERIC CONDITIONS. CONTAINMENT AND RECOVERY EFFORTS CONTINUED UNTIL DECEMBER 5, 2025, AT APPROXIMATELY 12:38 P.M. CENTRAL TIME, WHEN A MECHANICAL CLAMP WAS INSTALLED OVER THE DAMAGED SECTION OF PIPE, STOPPING THE RELEASE."