125. Merry Harriers

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Sadly, I never got to see this little bridge intact. I heard about the flood damage and went to see what there was to see. I think it has now been replaced but it was here. Even in the tattered remains, there is a lot to see.

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What is left is rather less than half a bridge. The break is remarkably clean.

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Look at that sag. The abutments have moved back more, nearer to the camera.

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Here we get to see some details of construction. An arch ring two bricks thick. The relatively shallow curve may have allowed the engineer to bond through. There is a goodly layer of brick backing, which was surely rather deeper before the washout.

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Looking closer, the spandrel wall is stepped and the lowest level is rendered.

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From a different angle, there is a lump of displaced brick sitting at a jaunty angle. Form here it is also clear we have 2.5 bricks or about 565mm in the ring.

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The other half has some very different construction. First though, notice how few bricks have fractured on the longitudinal face. Most was just a butt joint with mortar.

Above the brick backing, there is a rubble stone inside face to the spandrel wall.

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From here we can begin to see the extent of movement in the abutment.

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Here, at around ¼ span, there seems to be an area better bonded across the width. Notice that gap between arch and spandrel, I suspect it is tight at the outside edge.

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Is that very hard fill or rough concrete centre left?

And the surfacing is on a level with the last step in width as the spandrel reduces to the parapet.

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A more general picture shows that this abutment, too, has dropped considerably. Look at the surfacing levels.

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Viewed end on, the scale of the twist is impressive. I have heard the plastic theorems expressed in terms a structure will not fall down until it has exhausted all possible ways of standing up. Of course, that tells you nothing about serviceability.

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Looking from the other side the view is not clear.

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There is, though, a spectacular tilt on what remains of that abutment.

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This view shows more. The abutment has completely broken up. Poor bridge didn’t stand a chance.