1. Mick West

    Mick West Administrator Staff Member



    Source: https://twitter.com/DanBond0/status/1156927854019563522

    Reminiscent of the Orville spillway, but this time the spillway is on the face of the (much smaller) dam, so continued erosion could lead to a total collapse.

    Metabunk 2019-08-01 06-57-42.

    This is in the North of England, where I'm from, small towns and villages in narrow valleys. The town of Whaley Bridge, directly under the reservoir, is currently being evacuated.

    Metabunk 2019-08-01 07-01-46.
  2. Mick West

    Mick West Administrator Staff Member

    Here's the evacuation area, about 6,000 people.
    Metabunk 2019-08-01 07-18-10.
    Metabunk 2019-08-01 07-24-08.
    Last edited: Aug 1, 2019
  3. Mick West

    Mick West Administrator Staff Member

    Weather not cooperating
    Metabunk 2019-08-01 07-25-34.
  4. Mick West

    Mick West Administrator Staff Member

    • Informative Informative x 1
  5. Rory

    Rory Senior Member

    That looks bad. But if it included the amount of rain that is predicted to fall, it would show how bad.

    Here's one that does that:


    4mm tomorrow, 1.6mm on Sunday, 16.5mm on Tuesday (0.6 inches), and the other days around 5mm (0.2") per day.
  6. deirdre

    deirdre Moderator Staff Member

    cant they just throw some sandbags over the bad area to divert the water to the ok side?

    edit add... I see, it isn't the spillway hole that's the problem so much, its the river set up down stream is breaking apart. (not seen in this photo, just included to give perspective)

    Last edited: Aug 1, 2019
  7. jonnyH

    jonnyH Active Member

    • Like Like x 1
  8. Mick West

    Mick West Administrator Staff Member

    They are filling the hole with bags of aggregate (sand and gravel)

    Source: https://twitter.com/ODN/status/1157297182929821697

    They are also draining and pumping out as much as they can, as well as blocking the inlets to the reservoir - which I presume can only be a temporary measure to slow the inflow while they shore it up, as there does not seem to be a way of diverting the water around the dam.

    Nice weather though!
    Last edited: Aug 2, 2019
    • Like Like x 1
  9. deirdre

    deirdre Moderator Staff Member

    I meant like this guy is doing.. (but once I saw how fast the water sometimes comes down I thought I was being silly, guess not. hope it all works!)

  10. deirdre

    deirdre Moderator Staff Member

    a nice pic (ie. easier perspective) of what's 'downstream' if the dam wall/berm blows :(

  11. Mick West

    Mick West Administrator Staff Member

  12. deirdre

    deirdre Moderator Staff Member

    Wow! that's pretty bad. I didn't even realize originally how 'thin' the berm was at the top, used to looking at Orville I guess.

    Read this morning, they have 35% of the water out of the reservoir and are going to do a total rebuild.
  13. cloudspotter

    cloudspotter Senior Member

    And it is only 50 years old. Added to the dam in 1969 when the existing spillway capacity was deemed inadequate
    Metabunk 2019-08-05 05-26-52.

    Reading through Toddbrook's Wiki page it seems that it has always had problems and may not even have been built to the original specifications

    Last edited by a moderator: Aug 5, 2019
    • Useful Useful x 1
  14. Mick West

    Mick West Administrator Staff Member

    A better scan of the above link:
    Binnie, G. (1974). The Evolution of British Dams. Transactions of the Newcomen Society, 47(1), 207–224. doi:10.1179/tns.1974.015

    Fig. 13. Todd Brook Dam 1968. Photo by courtesy of the North West Water Authority
    Metabunk 2019-08-05 05-39-57.

    Fig. 14. Todd Brook Dam Main Spillway.
    Metabunk 2019-08-05 05-41-51.

    Fig. 15. Todd Brook Dam 1978, with auxiliary Spillway.
    Metabunk 2019-08-05 05-38-01.

    Plants were growing out of it in 1976! Still, if it was not there, the dam probably would have failed.
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  15. Gary McH-P

    Gary McH-P New Member

    Badly maintained!! A small tree growing and plant-shrub roots are not exactly helpful in the gaps between the concrete sections. Over time they will crack and break up the sections, severely weakening it. Which is what has happened to that section that has been undermined, collapsed and washed away. Amazingly it passed its last inspection! .https://www.bbc.co.uk/news/uk-england-derbyshire-49220650

    Last edited by a moderator: Aug 6, 2019