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Federal Register / Vol. 86, No. 148 / Thursday, August 5, 2021 / Rules and Regulations
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During December or January before ice roads are built, Tucker tracked vehicles transport cargo and crew daily.
During ice road construction, work will occur for 24 hours a day, 7 days a week, and is stopped only when unsafe conditions are presented e.g., high winds, extremely low temperatures. Ice road construction typically begins around January 1st when the ice is considered thick enough minimum of 61 cm 24 in and is typically completed within 45 days of the start date.
Once the ice road is built, tractortrailer trucks transport freight, chemicals for resupplies occurs every 2
weeks using 10 truckloads, diesel, and other equipment. Additional personnel and smaller freight travel multiple times a day in light passenger traffic buses and pickup trucks. A grader and snow blower maintain the ice road daily, and in the event of cracks in the ice road, a loader may be used. Tucker tracked vehicles and hovercraft are used beginning mid-May as ice becomes unstable, then, as weather warms, boats and helicopters are used. Hilcorp uses hovercraft daily between West Dock and Northstar Island to transport crew and cargo October through January and May through July when broken-ice conditions are present. Crew boats have also been used to carry crew and cargo daily from West Dock to Northstar Island during open-water months July to September when hovercraft are not in use. Tugs and barges transport fuel and cargo from West Dock and Endicott to Northstar Island during the openwater season July through September and may be used once a year to transport workover rigs. There are typically 630 trips per year.
Northstar performs emergency response and oil spill trainings during both open-water and ice-covered seasons. Smaller vessels i.e., zodiacs, aluminum work boats, air boats, and bay-class boats typically participate in these exercises. Future classes may utilize other additional equipment or vessels e.g., the ARKTOS amphibious emergency escape vehicle as needed.
However, the ARKTOS training will not be conducted during the summer.
Oooguruk Unit The Oooguruk Unit was originally developed in 2008 and is operated by Eni, consisting of several developments and facilities including the Oooguruk Drill site ODS, a 13-km 8.1-mi long pipeline bundle, and the Oooguruk Tiein Pad OTP. The OTP is an onshore production facility that consists of tanks, flowlines, support infrastructure, and power generation facilities. The
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pipeline bundle consists of two oil pipelines, a 30.5-cm 12-in inner diameter production flowline, and a 5.1cm 2-in inner diameter diesel/base oil flowline. The bundle sits about 61 m 200 ft from the shoreline when onshore and runs about 3.8 km 2.4 mi on vertical supports to the OTP. A 30.5cm 12-in product sales line enters a metering skid on the southeast side of the OTP. This metering skid represents the point where the custody of the oil is transferred to ConocoPhillips Alaska, Inc. Diesel fuels and base oil are stored at the OTP to resupply the ODS as needed.
The ODS is a manmade island located approximately 9.2 km 5.7 mi offshore and measuring approximately 5.7 ha 14
ac and is found approximately 12.9 km 8 mi northwest of the OTP. The site includes living quarters with 150 beds, a helicopter landing site, various production and injection wells, and a grind and inject facility. A Nabors rig is also located on the pad and the rig is currently not in use. The ocean surrounding the island is about 3.05 m 10 ft in depth and considered relatively shallow.
Oooguruk relies on interconnected gravel roads maintained by Kuparuk to gain access to the Dalton Highway throughout the year. Equipment and supplies travel from Anchorage and Fairbanks to the OTP through Deadhorse. The ODS is connected to the road system only when an ice road is developed and available from February to May.
Eni uses helicopters from May to January for cargo transport, which is limited to flights between the OTP and the ODS. Work personnel depart from the Nikaitchuq Units NOC pad; Eni estimates about 700 flights occur during the helicopter season for both crew and field personnel.
Eni occasionally utilizes off-road vehicles e.g., Rolligons and track vehicles during the summer tundra months with activities limited to cleanup on ice roads or required maintenance of the pipeline bundle.
During winter months, track vehicles transport personnel, equipment, and supplies between the OTP and ODS
during the ice road construction period.
The ice road is approximately 9.8-m 32ft wide, and traffic and activity are constantmost notably from light vehicles pickup trucks, SUVs, highcapacity personnel transport buses, ice road construction equipment road graders, water tankers, snow blowers, front-end loaders, dump trucks, and well maintenance equipment coil tubing units, wire-line units, hot oil
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trucks. Eni estimates over 3,500
roundtrips occur annually.
Eni will add 2,294 cubic m 3,000
cubic yd of gravel to facilitate a hovercraft landing zone on island east and will also conduct additional gravel maintenance at the shoreline crossing of the pipeline or the area where the pipeline transitions from the aboveground section to the subsea pipeline.
Maintenance in these areas is necessary to replace gravel lost to erosion from ocean wave action. Additionally, Eni performs gravel placement on the subsea pipeline to offset strudel scour pending the results of annual surveys.
Island armor i.e., gravel bags requires maintenance throughout the year as well.
Eni utilizes some in-water vessel traffic to transport crew and cargo from Oliktok Point to the ODS during the open-water season typically July to September. These trips occur daily or less if hovercraft are used.
Additionally, Eni uses tugs and barges to transport cargo from Oliktok Point to the ODS from July to September. These vessels make varying amounts of trips, from a few trips annually up to 50 trips depending on operational needs at the time.
Like the trainings performed at the Nikaitchuq Unit, Eni would also conduct emergency and oil spill response trainings throughout the ITR
period at various times. Trainings will be conducted during both open-water and ice-covered seasons with training exercises occurring on both the land and the water depending on current ice conditions. Further information on these trainings can be found on the submitted AOGA Request for 2021
2026.
Point Thomson Unit The Point Thomson Unit PTU is located approximately 32 km 20 mi east of the Badami field and 96 km 60
mi east of Deadhorse and is operated by ExxonMobil. The Unit includes the Point Thomson initial production system IPS, Sourdough Wells, and legacy exploration sites i.e., PTU 14, Alaska C1, West Staines State 2 and 18923. The total Point Thomson IPS
area is approximately 91 ha 225 ac, including 12.4 km 7.7 mi of gravel roads, 35 km 22 mi of pipelines, one gravel mine site, and three gravel pads Central, West, and C1.
The Point Thomson IPS facilities are interconnected by gravel roads but are not connected to other oilfields or developments. Equipment and supplies are brought in via air, barge, ice road, or tundra travel primarily from Deadhorse.
Traffic on gravel roads within the PTU

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