Spills

As the result of a frozen flow valve, an onshore tesoro tank transferring north slope crude overflowed into…

Tesoro Tank Spill; Nikiski, Alaska · Nikiski, Alaska · NOAAORR-7116

issued
1995-12-05 00:00Z
status
cancelled 1995-12-19 00:00Z
self-cancels
1995-12-19 00:00Z
authority
NOAA OR&R
sea
Gulf of Alaska
position
60.683, -151.433
source
incidentnews · first seen 2026-09-03 15:09Z

Original warning text

Tesoro Tank Spill; Nikiski, Alaska.
Nikiski, Alaska.
1. As the result of a frozen flow valve, an onshore Tesoro tank transferring North Slope crude overflowed into a diked area just before noon on December 5, 1995. Workers at the scene were unaware that the storm-water drain valve had been left open. This valve led to a pipeline that discharged 200 to 300 meters offshore onto the seafloor. This release was discovered by a commercial helicopter pilot who spotted the sheen shortly after the initial overflow had occurred. Weather during the spill was extremely cold with temperatures to -20?F, with only slight winds. USCG district 17. Keyword: CISPRI, sorbent boom.
2. COMMODITY: NORTH SLOPE CRUDE.
3. POSITION 60.683N 151.433W. NOAA INCIDENTNEWS 7116: https://incidentnews.noaa.gov/incident/7116

This area · spills & pollution incidents

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