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    Cheryl Anderson

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   Gulf of Mexico Region

Spills ≥ 50 Barrels (2,100 gallons) – 1990

January 24, 1990 - Shell Offshore, Inc.

Pollution: 14,423 bbl Condensate Operation: Pipeline
Rig/Platform: Platform A Lease: G05567
Area: Block: Ship Shoal
281		 Cause: External Damage: fishing net or anchor tie-in
Distance to Shore: 60 Miles Water Depth: 197 Feet
Pipeline Segment: 08324 Pipeline Diameter: 4 Inches

Remarks: A 2" weld neck flange and valve to a 4" reducing tee on a subsea tie-in was snagged by a fishing net or boat anchor. Response: cap was welded over the 2" opening and sand bags were placed over the top of the 4" pipeline tie-in. The pipeline connects between ST300 Platform A to SS241 Platform A.

OCS Report: MMS 91-0025

May 6, 1990 - Exxon Corporation

Pollution: 4,569 bbl Crude Oil Operation: Pipeline
Rig/Platform:   Lease: N/A
Area: Block: Eugene Island
314		 Cause: Leak: pipeline valve
Distance to Shore: 78 Miles Water Depth: 230 Feet
Pipeline Segment: 04030 Pipeline Diameter: 8 Inches

Remarks: A 1" valve protruding from a threadolet on an 8-5/8" spool piece on Exxon's subsea tie-in on oil pipeline to Texaco's 20" EIPS was apparently pulled from the threadolet by a trawl net. Response: deployed Clean Gulf Associates Fast Response Unit; shut down EIPS; divers and surveying equipment were dispatched; removed section containing the broken valve and blind-flanged the ends of the pipe remaining on the sea floor.

NRC Report: 21369

OCS Report: MMS 91-0066

December 31, 1990 - Amoco Production Company

Pollution: 110 bbl Zinc Bromide Operation: Drilling
Rig/Platform: Rig Workhorse IX (jack-up) Lease: G06180
Area: Block: High Island
22		 Cause: Equipment Failure: dump valve
Distance to Shore: 39 Miles Water Depth: 155 Feet

Remarks: Workover rig. While bringing a well on line after service, a dump line developed a leak. Zinc bromide (15.7 ppg) leaked through the dump valve for the fluid holding tank into an overboard line. Response: the dump valve has been repaired, and the overboard line has been welded shut so that fluid has to be pumped out. Lost fluid valued at $27,000.

NRC Report: 53054

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Last Updated: 07/01/08, 04:57 PM

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