End of 2017 update

After nearly a year working with The National Trust at Hardcastle Crags, we have now built 117 leaky woody dams using over 100 volunteers. Our volunteers have worked incredibly hard in 2017 and we simply would not have achieved what we have without all this incredible help. A massive Thank you if you have helped in any way on this project.

Early indications are that these leaky woody dams in Hardcastle Crags are  working to slow the flow and reducing the impact of flood water finding its way down the Calder Valley. Formal results of how much water has been slowed will be published in the New Year!

Certain in the knowledge that what we are doing works to reduce the impact of amount of water finding its way to our towns and villages, we will continue into 2018. However, we still need volunteers to continue with this important work. If you can help in any way whatsoever, please do get in touch or come to one of our volunteer days at Hardcastle Crags.

Click here for volunteer days for 2018.

There is still lots to do, not just in Hardcastle Crags, but across the Calder Valley and we are working with our partners to identify other areas which would benefit from the installation of these leaky dams. If you know of such an area, please do get in touch so we can arrange a survey and see how we can Slow The Flow near you.

After over a year in the planning, and with the recent grant made from The Calder Flood Partnership to The National Trust for work at Hardcastle Crags to ‘Slow The Flow’, volunteers have started work in the gullies leading into the river which flows into the River Calder.

New equipment has been bought, natural materials have been sourced and managed and volunteers have been recruited and trained to build leaky dams and for gully stuffing throughout the Crags.

To date, around 100 new volunteers have worked in this beautiful part of the Calder Valley and significant progress has been made in a number of gullies leading into the main channel in the Crags.

Volunteers ranging in age from 10 to over 70 have taken part. Work ranges from sawing timber, trimming brush, digging, and moving trunks into place to form leaky dams and to stuff gullies to encourage rain water onto the banks during heavy rainfall. The channels still work in normal flow but to try and reduce the amount of water making it into the main channels, the gully stuffing and leaky dams force the rain water over the banks and onto the slops.

This programme will continue throughout the summer in the Crags so if you want to get involved, contact us here to book your place. We usually start at 9.30 am and finish by lunchtime, currently over weekends.

Work parties are also being arranged during the week so if your company or organisation would like to get involved, please contact is here register with us. We already have 3 large organisations who will be working with us throughout the summer.

You will need to fairly fit although you will not be expected to carry heavy weights or work beyond your own limitations.  All we ask is that you have a desire to help ‘Slow The Flow’. There are a range of tasks suitable for all ages as we have already demonstrated with our amazing volunteers who have helped to date.

IMPORTANT INFORMATION ON CHILDREN WHO WANT TO VOLUNTEER  –  children under 18 are VERY welcome to volunteer but they must be supervised by you at all times. Please be aware that there are chain saws in use (solely by fully trained personnel) and dangers associated with: mechanical and manual movement of very heavy logs; unsupervised saws and other blades laid on the ground; and axes and saws in full swing. It is possible to work in areas where some of these dangers are not present but they may be adjacent to areas where they are present.