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Report - Diocletian, Bolton - Sept 13

Discussion in 'UK Draining Forum' started by concreteJungle, Oct 4, 2013.

  1. concreteJungle

    concreteJungle 28DL Regular User
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    Diocletian built the largest of the public baths in Rome, with room for thousands of bathers.

    I met with Snake Oil and Viraleye one evening to pop some lids and see if we could see something of the beast we knew lurked below.

    A large split CSO chamber takes the flows from two sewers, each side with a non-screened weir. The overflow leaves the chamber via a grilled pipe, this limits the flow rate out of the chamber and large banks of mud had gathered. The mud had a fledgling eco-system developing as an army of worms munched through, supporting a small population of frogs and surprisingly newts.

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    One of the incoming sewers came from a further smaller CSO chamber upstream, this acts as as last ditch overflow for when the larger chamber backfills. The overflow culvert was 1.6m bolted segments which ran towards the river.

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    Just before the final stretch to the grilled Croal outfall was a chamber sporting a rectangular flap.

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    In-between the overflow from the large CSO and the flap was 10k cubic meters of offline tank.

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    The scale of the place was awesome but what struck me most was the absolute silence, despite that the air was pretty good.

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    Here's a crop of the last image featuring Snake Oil to show some scale.

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    A couple of dropshafts appeared to take the flow from the CSO down the tower into the tank, with an overflow lip straight over the side.

    After a storm the pumping station above the tank empties the contents back into the main sewer, through a smallish pipe just downstream of the big CSO chamber.

    Cheers to Snake Oil and Viraleye for being top exploring partners.
     

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