Briefing Paper to the Energy & Infrastructure Overview and Wards : All Scrutiny Committee

14 th December 2016

Update on Flood Defence Schemes in

Briefing Paper of the City Planning Manager

1. Purpose of the Paper and Summary

1.1 The purpose of this briefing note is to update the committee on the flood defences schemes ongoing within Kingston upon Hull by all the Risk Management Authorities.

1.2 The paper is produced in response to the request from the Energy & Infrastructure Overview and Scrutiny Commission members.

2. Background

2.1 The city of Kingston upon Hull is at risk from multiple sources of flooding; tidal from , fluvial from the , Holderness Drain, and Barmston Drain, surface water, sewer and ground water. To reduce this risk a considerable amount of investment is required. Central government investment is called Flood Defence Grant in Aid (FDGiA) This is allocated and implemented through a system called Partnership Funding. To qualify for FDGiA a flood scheme must have a cost benefit ratio of 8:1 and score over 100% on the Partnership Funding calculator. The calculator is simply based on the number of properties protected versus the cost to implement the scheme.

2.2 Contributions are often required to “top up” the Partnership Funding score to justify the scheme and its priority. Following these initial calculations larger scale economic appraisals are required to look at damages and costs. Other sources of funding are the Local Levy, administered through the Regional Flood and Coastal Committee, Local Growth Funding (LGF), European Funding, Section 106 or Community Infrastructure Levy, the Environment Agency Environment Programme funds if there are habitat creation or WFD benefits and private sector contributions.

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2.3 The list below sets out the existing flood alleviation schemes that are ongoing and are either under construction or at feasibility stage and highlights contributions secured or required.

3. Flood Alleviation Schemes

3.1 Surface water schemes in partnership with East Riding of Council (ERYC).

• Willerby and Derringham Flood Alleviation Scheme. Aims to reduce the amount of surface water overland flows flooding the city from the west. Reduces flood risk to 8000 properties. Cost £13million. Contribution of £7million from European Regional Development Funding and £7million FDGiA. Completed.

• Cottingham and Orchard Park Flood Alleviation Scheme. Aims to reduce the risk to 4000 properties by storing and slowing the flow of surface water coming into the city from the Eppleworth Valley. Contribution of £9.3m from Local Enterprise Partnership of LGF and £11.2m FDGiA has been approved. Cabinet in January 2016 supported the use of council owned land in the East Riding to be used to create a storage area. The scheme is in final detailed design and planning consent is currently been sought.

• Anlaby and East Ella Flood Alleviation Scheme. Aims to reduce the flood risk to 12,000 properties by channelling and storing surface water. In 2007, flows came into the city from higher land to the west and overtopping from Western Drain. The scheme incorporates a tunnel, which bypasses properties in Anlaby to take flows to the existing storage area on Western Drain and to a larger storage area constructed at the site of the Sydney Smith School. The scheme is currently in construction through the demolition of the school and is funded through £7.9m FDGiA and £7.1m LGF.

• Hull and Holderness Flood Alleviation Scheme Phases 1 and 2. This scheme incorporates tidal flood defences which consist of a glass wall at Paull, this is completed, and a surface water scheme to the east of the city. Phase 2 the surface water element is still in feasibility. The scheme will consider removing surface water from the sewer system at Bilton, which currently flows into Hull. This will ensure that there is more capacity in the sewers in the east of the city. There will also be a bund or storage lagoon to the east of Marfleet to reduce the flood risk from Old Fleet Drain. The funding for this is indicatively FDGiA and LGF but contributions may be required dependant on cost as the economics are difficult. It is probable that this work may fit in with Yorkshire Waters’ investment plans so funding could also be secured from them.

3.2 Surface water “Aquagreens” schemes led by Hull City Council

• Barbara Robson Playing Fields. This scheme aims to slow the flow of surface water in heavy rainfall events entering the Sutton Branch sewer. At present water ponds and overflows in low spots on the sewer catchment. The scheme involved creating a bund and a swale to capture and store overland flows which come from Sutton village onto Robson Way and into the sewer via the Highways gully. A small pipe restricts the speed

Author: Status: Date: 06/12/2016 Page 2 of 7 and amount of water stored so it can be held in the swale and discharged once the storm is over. The scheme is now complete at a cost of £9,250 with a £3,125 contribution from Yorkshire Water and the rest Local Levy funding.

• Willerby Road and Wymersley Area Flood Alleviation Scheme. Using a similar principle to above, this scheme aims to capture flood flows in heavy rainfall events running down Willerby Road. At present these pond at the lowest spot on the road, which is usually commercial or residential property. The scheme involves intercepting flows from the highway into a dedicated storage area on green open space. The floodwater is then discharged back into highways gullies once the flows have reduced. The scheme cost is £33,900k. The feasibility of this scheme and infrastructure for getting the water off the road was contributed to by Streetscene. There is a contribution from the Environment Agency’s Environment programme and Local Levy. Construction is due March 2017.

• Bristol Road Flood Alleviation Scheme. Bristol Road consists of a green open space in a teardrop shape in the middle of the housing estate. Every house in the vicinity flooded in 2007. With the Ward Councillors and the community, a scheme has been considered to provide storage in the form of swales and a dry basin. The scheme will reduce flows to the Northern sewer in times of heavy rain. The cost is £21k, with a £5k contribution from the Ward, the Environment Programme and Local Levy. The scheme is in construction.

• Noddle Hill Green Squares/Kingfisher Close. Within the housing estate there are two green squares between the houses which are currently underused. The proposal is to create a vegetated swale in one and by working with Streetscene, look at a parking area with permeable paving or a swale to provide a flood storage function. Funding for the vegetated swale is secured from the Environment Programme and Local Levy, construction will start in January 2016.

Author: Status: Date: 06/12/2016 Page 3 of 7 • Willerby Carr Culvert Daylighting. The Willerby Carr culvert ran through the site of a former school which was flooded in 2007 and never re-opened. The culvert was blocked with tree roots and debris and required regular maintenance. Along with the ward Councillors and the community a scheme was proposed to daylight 300m+ of culvert and re-meander, plant a neighbourhood orchard and provide paths around the site. The scheme completed in September and was used on 21 st November when the new channel filled with surface water. The scheme was also shortlisted nationally for a CIRIA Big Biodiversity Award.

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• Howdale Road/Wimpey Fields. This project aimed to address Water Framework Directive (WFD) issues alongside flood risk and habitat creation. A swale and dry detention basin have been created which discharge to Suttoncross Drain. This drain is currently failing the WFD on water quality issues due to stagnation and lack of flow. The scheme aims to address this issue whilst alleviating flood risk by removing surface water from the sewers. Land was raised using the soil from the swale and basin, which then created a dry area for a football pitch. By sacrificing a small area of the field for flood measures the rest of the field will benefit from improved drainage. The scheme cost £31k and was funded by Defra through the Catchment Based Approach funding with a £9,875 contribution from Yorkshire Water. The scheme was a partnership with Yorkshire Wildlife Trust and is completed.

• Lambwath Stream. This scheme is also a partnership with the Yorkshire Wildlife Trust and is funded partly by the Catchment Based Approach fund and the Environment Programme The basis was to provide a swale along the line of the filled in Lambwath Stream in playing fields off Bellfield Avenue. The scheme cost £19k and is constructed.

• Norland Avenue Individual Property Suds retrofits. This project is a partnership between Yorkshire Water, HCC and ERYC. It aims to create a pilot for wider use in the city if successful. On an individual property basis in one residential street, a series of Suds such as raingardens, swales, or storage tanks will be implemented to slow the flow from each property into the sewer. The scheme aims to be delivered in 2016/17 but has slipped to the next financial year because of the resources required to deliver from each authority.

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3.3 Main River and Tidal Schemes

• River Hull Defences . This is a £37million investment to improve the standard of protection of the River Hull flood defences. The Kingston upon Hull Act states that a defence is required to a specified height but does not state the quality or specification of those defences. The EA and HCC regularly inspect and enforce this Act along the river. In several locations, despite the correct height being achieved, the defence is made of rubble, scrap metal or a derelict wharf or building in places. This is not an appropriate standard of protection and leads to an unacceptable probability of a breach. The consequences of this are severe for the city. The topography means the velocity and amount of water that would flood the city from a breach is extremely hazardous and could result in loss of life. As a result of this the EA are proposing a 3 phase project to improve the flood defences and ensure a consistent standard of protection. The project does qualify for full funding from FDGiA because of the large numbers of residential properties at risk however; work is ongoing with adjacent landowners to establish a way of contributing in a rational way to reduce reliance on the public purse. Phase 1 of the scheme, on the urgent sections is approved and construction is commencing. A contribution of Local Growth Funding and European Regional Development Funding has been secured. Work is ongoing to secure contributions for the next phases.

• River Hull +/River Hull Inlet. This scheme is part of the River Hull defences. The River Hull + is a European Funding bid for reconnecting the city with the riverside and contributing towards the defences. This includes accelerating sections of defence to enable development, creating access to the river, moving the Artic Corsair from its existing berth to the dry dock which was the entrance to Queens Dock, signage and fishing platforms. The scheme is part of the City Plan. A full application for £3.5million has been successful and the project is commencing in Spring 2017.

• Schemes arising from the River Hull Integrated Catchment Strategy. This includes a scheme on Holderness Drain to reduce the risk to Bransholme and channel conveyance works on the River Hull. The Holderness Drain scheme seeks to create flood storage washlands, along with habitat creation on 155ha of land alongside the Holderness Drain. The details of the land are included in the background documents. A Cabinet report has gone to HCC and ERYC and a decision has been made to purchase the section of land within the respective authority boundary and work jointly on the project. The legal teams are currently working with Crown Estates on the purchase. ERYC are currently working on the economic appraisal and licenses for the channel conveyancing works which are programmed for 2017-18.

• Humber: Hull Frontages. In a similar principle to the River Hull defences, this scheme aims to achieve a consistent standard of protection up to 2040 along the Humber frontage for the city from Saltend to Haven. The scheme will deal with various sections of the frontage in phases. The Albert Dock section was completed at a cost of £6.5million. £3million of this was LGF. The scheme is currently in feasibility as to the requirements of the height of defences at each location and the economic business case

Author: Status: Date: 06/12/2016 Page 6 of 7 to secure funding. External contributions have already been secured and used for this scheme. These are through the Green Port Hull scheme and the C4Di building where private defences have been constructed to the Environment Agency’s specification. ERYC have constructed a glass wall flood defence at Paull as part of the Humber frontages and they are working on the requirements for defences between Paull and Saltend and Hessle Haven to the Humber Bridge to tie in with the Hull Frontages.

4. Next steps

4.1 For any further information on these schemes, locations for future small surface water schemes, linking with the use of S106 for green space improvements or ideas for contributions or connections with other schemes please contact the Flood Risk Planning Team.

Alex Codd, City Planning Manager

Contact Officer : Rachel Glossop Telephone No. : 612129

Officer Interests: None

Background Documents: - Sales particulars for land at Holderness Drain

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