Prudhoe Bay Crude Oil Topping Unit (COTU)

Hilcorp North Slope, LLC · Hilcorp Energy Company (Hilcorp Alaska) · Prudhoe Bay, AK

Operating PADD5 diesel

Aerial view of the site Imagery: USDA, USGS The National Map (public domain)

bpd crude capacity · EIA 2026: 6,500
pipelines it injects into: 0
delivery points reachable: 0
terminals on those points: 0
events on record: 3

Capability

Crude distillation 6,500 bpd operable, 6,500 operating (EIA-820, as of 2026-01-01). Downstream units below, barrels per calendar day.

Crude slate

Prudhoe Bay field crude oil (North Slope).

Crude in & products out

Direction	Mode	Route	Point / origin	Products	Source
crude in	pipeline	Field gathering lines (Prudhoe Bay Unit) Captive field topping unit run on the unit's own produced crude; not fed by a merchant crude pipeline.	Prudhoe Bay field production	crude	source
products out	truck rack	Prudhoe Bay topping plant diesel distribution Per 2006 trade-press reporting (facility then BP-operated), the Prudhoe Bay topping plant produces diesel fuel delivered by truck, including supplemental volumes to the Kuparuk ULSD facility when demand is high.	Prudhoe Bay Operations Center	distillate	source

Pipeline reach

No tariff origin point is linked to this refinery yet.

Substitutes

No other refinery shares a tariff system with this one in our data.

Events

2025-12 other
Alaska Division of Oil and Gas approved a name change for the Prudhoe Bay operator from 'Hilcorp North Slope' to 'Hilcorp Alaska.' source
2024-07 other
Alaska DEC renewed the Title V air quality operating permit (AQ0265TVP04) for the Crude Oil Topping Unit. source
2020-06-30 sale
Hilcorp completed acquisition of BP Exploration (Alaska) Inc.'s Prudhoe Bay interests and became operator; the operating entity was renamed Hilcorp North Slope, LLC. source

Rates are pipeline line-haul transcribed from published FERC tariffs; every figure cites its tariff and item. Cost to serve (netback) adds origin spot price and destination fees. "Confirmed" links match a tariff delivery point to the facility; "same city" means the point is in the facility's city — plausible, not proof; "per research" means the facility's research profile names the pipeline as an outlet.