Early in the afternoon, as he drove away from Bridge End Farm, the news came in that Cooper had been expecting. After days of heavy rain, the River Derwent was flooding all the way from Rowsley to the point where it met the Trent – a distance of more than thirty miles. A good ten or twelve miles of that was in E Division. Darley Dale, Matlock, Cromford and Whatstandwell were all affected. The B5057 between Darley Bridge and Two Dales was closed. Cooper remembered seeing a pub at Darley Bridge almost overwhelmed by flood water two years ago. He hoped this wasn’t going to be a repetition.
The Highways Agency was reporting that the village of Beeley, near Chatsworth, had been hit by flash floods. A steep stretch of the A619 from Chesterfield to Baslow was said to resemble a river as traffic struggled to force its way through the water. As usual, motorists were abandoning their cars, making it difficult for emergency services to get through. Even for anyone who knew the area well, large amounts of water could change the appearance of a road and make it impossible to gauge the depth. Yet some drivers ploughed into floods oblivious to the risk. The air intake on many cars was low down, and it only took a small amount of water to wreck the engine. You could blow a head gasket, break a conrod, or burst the entire cylinder head off.
Cooper worked his way through the back lanes on higher ground near Youlgreave as the news continued to get worse. Within an hour, the status of the emergency had been raised to a severe flood warning – and that meant danger to life. Emergency sandbags had been issued, pumps were being used to clear sections of road. Rail services were cancelled, flood water had closed more routes and landslides had blocked others. In places, high winds had brought down power lines and hundreds of homes were without electricity.
Now the Fire and Rescue Service had boats operating in the worst-affected areas, picking up people who’d decided to stay in their homes in spite of the warnings. More heavy rain was predicted for the rest of the day. Falling on already saturated ground, it would make the situation even more critical.
A mile further on, Cooper came across a team of council workers in yellow high-vis jackets, desperately trying to pump water off a flooded section of road. A huge amount of water was surging across the roadway, surely more than would be caused by surface flooding or blocked gulleys. It looked more like a burst water mains. He wound down the window and leaned his head out.
‘What’s happened?’ he said.
‘An adit has burst.’
Then Cooper heard the noise. A thunderous roaring in the air, as if he was standing close to a giant waterfall. When he looked up he was amazed to see thousands of gallons of brown water gushing from an enormous hole in the hillside, forced out under pressure by the flood that had built up in the old mineshafts behind it. Where it hit the air, the torrent foamed into a creamy head as though the hill had turned itself into a vast spout of Guinness.
He could see that the water was full of debris being scoured out of the mine. Soil, stones and the occasional larger lump of rock plummeted through the deluge and bounced off the hillside further down the slope before crashing into trees near the stream bed.
‘It must have got blocked further down for it to burst here. The water’s obviously been backing up for days. There’s not much we can do about it until the adit has emptied itself.’
‘Where is the water going?’
‘On to the road, as you can see. And then to wherever is downhill from here. You’ll have to find another way round.’
‘I’ll try Lea Road.’
‘I think you’ll find Lea Road is already closed, mate.’
Cooper turned the Toyota round but a few minutes later he discovered the council workman was right. He could see across the valley that the road running down from Holloway into Cromford was flooded in two places, at Bow Wood near the car park for High Peak Junction, and again between St Mary’s Church and the railway station, where the rugby field was well under water.
Down in the village, the water was three feet deep, and sandbags were piled at every door. People were always shocked by the speed that this could happen. Within twelve hours of heavy rain, you could find the waterline three feet up your walls and stinking brown sludge filling your ground-floor rooms.
No vehicles could get through in these conditions. Driving at any speed into water more than about fifteen centimetres deep could feel like driving into a brick wall. Unexpected patches of deeper water might be hidden by a bend or a dip in the road. Just two feet of standing water could float your car, and just one foot of water if it was moving. As wheels failed to hold their grip, you lost control.
The Toyota had an air intake higher off the ground then most modern cars, so Cooper had an advantage. But even a four-by-four vehicle could get swept away by flood water. It might be four-wheel drive, but it wasn’t amphibious. The abandoned cars standing in deep water for hours would need to have their spark plugs or injectors removed and their engines turned over to expel water from the cylinders before anyone tried starting them. But he bet that wouldn’t happen in a lot of cases. There would be a surge of claims on motor insurance policies for Glen Turner’s colleagues at Prospectus Assurance to deal with in the next few days.