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Severnside Sirens
Civil Defense sirens in England From Wikipedia, the free encyclopedia
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The Severnside Sirens are a system of Civil defense sirens located along the South Severn Estuary coastline from Redcliffe Bay to Pilning, northwest of Bristol. They are activated by Avon and Somerset Police[1] in the event of a potential incident at one of the COMAH sites located in the area, mainly in and near Avonmouth.[2] The system was setup in 1997 following a fire[3] at the Albright and Wilson site in 1996.[4]
Severnside Siren locations
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Severnside Sirens Trust
Severnside Sirens Trust Limited is the organisation responsible for maintaining the system. It is a registered company (number 3348008) and charity (number 1063224)[5] and was incorporated on 9 April 1997.[6] The trust's activities are funded by the 3 local authorities whose constituents the sirens serve, North Somerset Council, Bristol City Council, and South Gloucestershire Council, and from donations from the organisations running the COMAH sites themselves.
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Sirens
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The sirens themselves are mounted on dedicated poles and all but one[citation needed] are manufactured by the Federal Signal Corporation. Most of them are Federal Signal Modulators. They are operated via radio signal from a control system at Avon and Somerset Police Headquarters in Portishead.
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Testing
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The sirens are tested at 1500 on the 3rd of every month. The test comprises the following:[9]
- 3 minutes of the alert warning (a continuous, stepped, rising tone)
- 1 minute of silence
- 1 minute of the all clear siren (a continuous constant tone)
Local volunteers monitor the sirens on test day.[10]
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