]> 2026-04-04T19:43:03+00:00 Case study:Hedleyhope Burn 500 en WR KT A4 Cornsay.pdf Approved creation of rock pools downstream of culvert Wear Rivers Trust Great Britain Defra Catchment Restoration Fund Durham County Council Durham University Yes No Yes false No 54.782356504689,-1.7352712154388 Steve Wear Rivers Trust Hudson creation of rock pools downstream of culvert,, ,,, 4593 Completed rock ramp easement. Photograph courtesy of the Wear Rivers Trust 2012-09-01Z 2456171.5 Hedleyhope Burn.png 2012 2455927.5 Complete The River Deerness catchment has multiple WFD failures, for both fish and water quality. Funding from the Catchment Restoration Fund as well as Durham County Council and Durham University allowed for the provision of a rock pool fish easement at a road culvert on at Cornsay Colliery located on Hedleyhope Burn (a tributary of the River Deerness), completed in September 2012. Hedleyhope Burn is 9.2km in length. The road culvert has been cutting of fish access to 5km of good quality habitat, as under most flow conditions the culvert becomes impassable. This 30m corrugated steel pipe has rapid and shallow uniform flows when water levels are low, and concentrated high velocity flows at high water levels. An extensive erosion pool at the downstream exit to the culvert exhibits the force of water leaving the culvert. A wide concrete step 15 to 20 cm above the surface of the water also obstructs fish passage into the culvert. The solution was to replace the existing scour pool with a series of rock pools to provide a variety of flows for fish, as well as drowning out the concrete step by increasing water levels back into the culvert and creating a slower and deeper flow, improving fish passage. Flood risk was not increased as the site is in a deep depression with no buildings close by. The site is owned by Durham County who also contributed half of the cost. The Wear Rivers Trust helped with the design of the rock pool easement. Due to the location in a high rainfall upland area, 2-3 tonne rocks were used to form a continuous line of bank protection to protect the site a high flow levels. Larger gravels were also used, and willow spiling is due to be installed at a later stage. Hedleyhope Burn hedleyhope burn No 130 Wear Northumbria Hedleyhope Burn from Source to Deerness hedleyhope burn from source to deerness Cornsay Colliery cornsay colliery 10 - 100 km² 309 200 - 500 m Hedleyhope Burn from Source to Deerness GB103024077290 Fisheries GB103024077290 Hedleyhope Burn from Source to Deerness 2012-11-23T14:58:26Z 2456255.123912 2016-03-15T16:01:06Z 2457463.1674306 Hedleyhope Burn 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Hedleyhope Burn]] [[Subcatchment title::Hedleyhope Burn from Source to Deerness]] Hedleyhope Burn# QUERY3afecddede6c675c61d03b13ba82a79d