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General - Brown Source, Manchester - Aug 15

Discussion in 'UK Draining Forum' started by concreteJungle, Aug 23, 2015.

  1. concreteJungle

    concreteJungle 28DL Regular User
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    The Moston Brook is formed by the confluence of the Hole Bottom Brook and Bower Brook, both were culverted sometime after 1910. A concrete tunnel was constructed in the 1990s to provide drainage for the M60 with the outfall built alongside the old one.

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    The outfall grills were clean 6 months ago, this time both had an unhealthy collection of jamrags that showed sewers had been spilling heavily upstream. I spent some time with TunnelMon carefully clearing the right hand grill and we made our way into the tunnel. Due to the entry method I took minimal kit and an old crop camera so the photos aren't my best. To make things worse the lens I was using broke halfway so I couldn't change aparture or focus.

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    After a brick tunnel on the verge of collapse, a stone section, more brick then a concrete U shaped tunnel we came to the infall for the Hole Bottom Brook. This is backed up behind the infall grill by around a meter and in dire need of unblocking.

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    A side pipe contributed around half the flow and a load of warm air that was the cause of intermittent fog downstream.

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    A concrete sewer overflow culvert joined in a modern shaft, following the older tunnel it appeared to shrink down until a staircase revealed itself. This goes up and a pill shaped brick tunnel goes for around 100m, with the newer sewer overflow laid beneath.

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    The tunnel was bricked up, possibly as a result of work done in the 1980s to infill the tunnel as it passed under the railway.

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    Back to the split chamber and the other pipe continued for around 170m before coming to a impassible wall with a small hole, by this point we had walked just over 800m from the outfall.

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    The chamber was built in 2014 to divert flows from a pumping station overflow upstream into a nearby tank. Presumably when the sewer starts to spill the penstock in the wall closes, the tank fills. When it's full the penstock opens to allow spills down the culvert into the brook.

    It's said sometimes the source of a river is it's longest tributary, which makes the brick stoopy pipe (Bower Brook?) seen next to the stairs the source. It's difficult to say for sure other than that the Moston Brook is conceived somewhere in this sewery culvert.
     
    #1 concreteJungle, Aug 23, 2015
    Last edited: Aug 23, 2015

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  2. Ojay

    Ojay Admin
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    Nice, always put off looking at that stretch beyond the grille

    Here is a pic from the upstream sewer overflow taken in 2013 before they upgraded it all and installed that tank at Hollinwood

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  3. Lavino

    Lavino 28ÐŁ ƦEGUŁλƦ U$EƦ
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    That looks very good. Not really been into these tunnels but that could tempt me to take a look well done ..
     
  4. Camera Shy

    Camera Shy Old enough to know better
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    "Fresh"
     
  5. Choo Choo m8ty

    Choo Choo m8ty Mr Reality Hacker
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    Nice. Looks an interesting one thanks for the report and nice pics
     
  6. Snake Oil

    Snake Oil go in drains
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    nooooooooo!!! I looked at these grilles ages ago and fucked it off as not doable (too fat to get through!) :thumb
     
  7. concreteJungle

    concreteJungle 28DL Regular User
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    It's avoiding getting wet that's the problem, there's actually more space than you think. I went fully prepared for a dunking in shorts and tshirt!
     
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  8. concreteJungle

    concreteJungle 28DL Regular User
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    @Ojay - I thought that cso chamber would be a bit more fancy, did you write it up?
     
  9. Ojay

    Ojay Admin
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    The original CSO chamber was basic.. Single sided weir and a mesh filter that I'm stood on in that pic

    As for writing stuff up, a combination of CBA and lack of time has prevented me from sticking much up these day's

    Some decent pics considering the conditions, keep 'em coming :thumb
     
  10. green godess

    green godess 28DL Full Member
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    Small wonder that there's so much localised flooding when things get bad. Just look at that choked and blocked-up grill, maybe the local water authorities should pay an honorarium to our intrepid and tenacious explorers, for discovering such dreadful blockages, that will eventually cause trouble !
     
  11. concreteJungle

    concreteJungle 28DL Regular User
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    We were talking in the drain about if the Council or Utility Company was responsible for the infall, probably the Council as it's a watercourse.

    I know the later keeps a close eye on what we do. It's important to always give the upmost respect to drains so incorrect conclusions shouldn't be drawn.
     
    #11 concreteJungle, Aug 23, 2015
    Last edited: Aug 23, 2015
  12. Ojay

    Ojay Admin
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    The environmental agency visit here quite regular as it goes and United Utilities inspect the majority of their assets at least once a month with the exception of pumping stations which are more frequent for obvious reasons
     
  13. TheVicar

    TheVicar Loyal to the Drain
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    Top stuff!
    Glad to know the weather held out enough for you to get this done safely.
    There is quite a lot more to this drain beyond those grills than I had imagined.
    Well worth the effort and pics aren't bad at all despite old camera with knackered lens. :D
     
  14. Alley

    Alley Conspicuous Loiterer
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    Great set of photos :thumb. This section is an interesting shape. Is it meant to be like that, or is it the collapsing bit?

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  15. concreteJungle

    concreteJungle 28DL Regular User
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    I think it was round once, TunnelMon has a shot the other way which had larger areas of bricks missing. It looks like it's built of triple rings of brick and the third layer can be seen in parts :eek:
     
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