Appendix E – Summary of flood risk in Amber Valley borough The table below summarises the areas where there are notable flood risks within the borough. Area Fluvial flood risk Existing defences Surface water flood risk Susceptibility to Groundwater Reservoir inundation Historic, recorded flood events flood risk risks <25% >=25% >=50% >=75 <50% <75% % The South- The Mackworth Brook originates north of Duffield benefitting A higher-risk surface water flow path in the 30 ✓ ✓ ✓ ✓ Kedleston Park Lake 1 Of the Recorded Flood Outlines data West Kirk Langley, flowing south-east past from wall defences and 100-year events flows south-east into the & 2 are located south from Amber Valley Borough Council: (Duffield. Mackworth. Flood Zone 2 is generally along the River borough on the western boundary, following east of Kedleston. 1 historic flood outlines within this area: Windley, restricted to a narrow floodplain, not Ecclesbourne, high the topographic route of the River Inundation flow path • 01/01/1997 – Markeaton Brook and Idridgehay, affecting property/infrastructure until the number of properties Ecclesbourne. A higher risk accumulation zone flows south-east out of Mackworth Brook, area of confluence Kedleston, area of its confluence with the Markeaton benefitting up and is present west of Shottle train station. The the borough, affecting flooded on southern borough Kirk Brook where properties in Gravelpit Wood downstream of the A517 and the B5023 north of Windley are parts of Allestree in boundary. Langley are at risk from Flood Zone 2 only. A6, including affected by this flow path. Between here and close proximity to the and Tamworth Street, Duffield, the 30-year risk is confined to the Cutler Brook. Of the Recorded Amber Valley Historic Mackworth The Mercaston Brook originates on the Town Street and topography of the river channel and the 1,000- flooding data from the LLFA: ) south-west borough boundary, west of properties north of year risk spreads wider into the rural 4 historic flooding points within this area: Mercaston. It flows south-east following the Ecclesbourne Avenue floodplain. Larger areas of surface water • 15/01/2007 – Bottle Brook flooded boundary before flowing towards Kedleston (EA AIMS dataset). ponding and overland flow paths are within the part of Denby Lane/ Ticknall Lane, where it becomes the Cutler Brook. This flows town around Wirksworth Road and Derby. south-east to become the Markeaton Brook Ecclesbourne Avenue. A significant flow path • 01/08/2012 – Broadway, Duffield which eventually flows out of the borough at forms around Cumberhills Road to the south- flooded by surface water. Affecting Allestree where it converges with the west, flows over the B5023 Broadway, across ground floor of house/ flat. Mackworth Brook. Flood Zone 2 is generally residential streets such as Curzon Lane, New • 17/07/2012 – Derby Road, Duffield. confined to a narrow floodplain, only Zealand Lane, Wirksworth Road, Ecclesbourne Surface water flooding. 25 back affecting a number of rural roads which it Close, the A6 then east to Duffield Meadows. gardens flooded from flooding from flows beneath. Of particular note are In Duffield, the 1,000-year event affects fields. properties on Somme Road, Allestree which considerably more properties than the 30-year • 25/03/2013 – Broadway, Duffield. are at risk from the Markeaton Brook’s Flood event; however, many of the streets listed Flooding from ordinary watercourse. Zone 2. Where the Markeaton Brook above are affected in the 30-year event. Silting of new housing developments converges with the Mackworth Brook, Surface water risk along the Cutler Brook, drainage pond. Fears that it could properties in Gravelpit Wood are at risk as Markeaton and Mackworth Brooks largely overtop during a storm. above. follows the rural watercourse alignments and floodplain and only affects properties when Of the S19 Reports held by the The River Ecclesbourne flows south into reaching the outskirts of Derby. Derbyshire County Council (LLFA): the borough on the western boundary, it then One event involving widespread flooding flows south-east past Idridgehay and Shottle in November 2019: before flowing into Duffield from the west. In • 15/11/2019 – The S19 does not the upstream areas of the river, Flood Zone report of any flooding in Duffield but 2 is generally confined to a narrow floodplain, graph of river levels shows that at affecting mainly the rural roads which it Duffield river flow was approximately passes beneath. However, properties within 80m3s-1 (Cumecs). close proximity to the river are at risk. Alton Mill Farm (north of Idridgehay) is at risk from inundation in both Flood Zone 2 and 3. Moving downstream, at Shottle, the A517 is at risk from Flood Zones 2 and 3, along with over 2km of railway line from Shottle towards Duffield due to its close proximity to the River Ecclesbourne. At Windley, the B5023 is at risk from Flood Zones 2 and 3, along with a number of properties in the east of the village which are at risk from an unnamed watercourse which flows east into the River Ecclesbourne. As the Ecclesbourne flows into Duffield, the floodplain widens, resulting in a large area within the settlement being at risk. On the edge of the settlement, properties on Ecclesbourne Meadows are at risk from Flood EFN-JBAU-XX-XX-RP-HM-0002-A1.C02-Appendix_E Zone 2. The central areas of Duffield are at highest risk due to proximity to the river, such as the area around Park Road, Old Hall Lane and the adjacent education facilities. Tamworth Street, Duck Island and Snake Lane area is also at risk. Areas along the A6, Ecclesbourne Avenue, Ecclesbourne Close, Lodge Close and Makeney Road also fall into Flood Zone 2 risk areas. Of particular note are properties which are in closer proximity to the river, as these also fall into Flood Zone 3 as well as 2, such as Tamworth Street area, Ecclesbourne Avenue and Church Walk. Church is at additional risk due to it being on the River Derwent's floodplain. The River The River Derwent enters the borough A higher risk flow path originates north-east of ✓ ✓ ✓ ✓ Howden Reservoir is Of the Recorded Flood Outlines data Derwent, flowing south-east along part of the north- Whitemoor flowing south-west, following the located within the High from Amber Valley Borough Council: the west & western borough border just west of course of the Coppice Brook. In the east of Peak area. Its inundation 1 historic flood outlines within this area: Belper Holloway. It flows south through the borough Belper, a flow path sees significant flow path flows south (Belper, past Ambergate, Belper and Duffield before accumulation in all 3 surface water events following the course of Of the Recorded Amber Valley Historic Scotches, flowing out of the borough on the southern around Nottingham Road, Short Street, the River Derwent, flooding data from the LLFA: Whatstandw boundary, south of Duffield. Spencer Street and Alton Road affecting a entering the borough 3 historic flooding points within this area: ell, Where the River Derwent flows into the number of properties and access roads. south-west of Holloway. • 31/08/1997 – sewer flooding on: borough, the Lea Brook flows into the Accumulation/ ponding is also seen in the west The inundation flow path Hillside Rise and Holbrook Road. Toadmoor, Derwent; this Brook’s’ Flood Zones 2 and 3 of Belper around Days Lane and Queens follows the course of the • 23/01/2012 – Lowlands Road, Belper Bullbridge affect some properties west of Holloway and Street, seeing a number of properties affected. Derwent, affecting flooded by partially blocked and Milford) affect Lea Road. Elsewhere around the Derwent corridor, the properties along the watercourse by blockage in upstream From the point of entry into the borough up surface water flood extents primarily follow the course of the River pipe. Affecting garden. to Whatstandwell, the River Derwent’s Flood topography of the Derwent floodplain and Derwent, with a high • 04/12/2012 – Farland site between Zone 2 extends onto the A6 at multiple affect mostly rural land areas adjacent to the number of properties Crich Lane and Broadholme Lane, points. New housing developments on river due to the steep valley topography, with affected past Belper. Surface water flooding. Lathkill Lane, Alsop Lane and Lea Lane are at fewer areas of ponding away from the channel. Ambergate, Belper and • 09/04/2013 – Land drain from school risk from Flood Zones 2 and 3. Duffield. behind house is draining into a Just north of Ambergate, business properties garden, causing flooding. are at risk from Flood Zones 2 and 3; here, Ladybower Reservoir the Peatpits Brook also flows into the is located within the Of the S19 Reports held by the Derwent which increases Flood Zone area. High Peak area. Its Derbyshire County Council (LLFA): At Ambergate, the Derwent’s Flood Zones 2 inundation flow path One event involving widespread flooding and 3 affect a number of properties around flows south following the in November 2019: Holly Lane. The Flood Zone extents are also course of the River • 07/11/2019 – ‘One months’ worth of increased by the confluence with the River Derwent, entering the rainfall’ fell in the upper Derwent Amber (described in more detail in ‘The borough south-west of catchment. Belper Town Football Club North’ area). Holloway. The and Babington Hospital pictured as Where the River Derwent passes Toadmoor, inundation flow path flooded in the report. Flood Zones 2 and 3 affect the A6 and 2 follows the course of the railway lines where they cross the river. Derwent, affecting South of Toadmoor, the River Derwent’s properties along the floodplain widens significantly, affecting a floodplain of the rural property on Wyver Lane (Lawn Derwent with a high Cottage).