Alerts & Learnings IOGP Alert - Lid from decommissioned open vent line fell onto walkway during heavy winds A 'bird screen' lid with a weight of 20kg which had been bolted on to a decommissioned atmospheric vent line fell down on a walkway 37m below during a period of high winds (50-60 knots). To view this IOGP Safety Alert in full click the 'Download Alert' button above. Download Alert Rate this Alert Your Rating Average Rating Share: Share on Linkedin Share on Facebook Share on Twitter Share with Email