Case study:Forest Halt, Saltburn Valley Gardens

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Location: 54° 34' 44.58" N, 0° 58' 13.21" W

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Project overview

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Status	Complete
Project web site
Themes	Economic aspects, Flood risk management, Social benefits
Country	England
Main contact forename	Peter
Main contact surname	Batty
Main contact user ID
Contact organisation	RAB Consultants
Contact organisation web site	http://www.rabconsultants.co.uk/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The initial scope of the project was to assess the overall structural and hydromorphological condition of the watercourse running through Saltburn Valley Gardens to identify areas on potential improvement.

Three areas were identified as requiring intervention within the gardens where the part of the watercourse was beginning to effect infrastructure, namely the miniature railway line and the public car park or deposition is severely reducing the capacity of the channel. Given the lack of infrastructure surrounding the remainder of the watercourse this will be left to its natural processes. The first of the areas is located at the downstream end of the watercourse, at the confluence of Skelton Beck, Millholme Beck and the sea. At this location rapid erosion is taking place of the right-hand bank due to frequent inundation and the diversion of flows caused by silt deposition upstream, the second area of interest. The third area of interest and focus of this entry, is an area at the upstream end of the gardens adjacent to the final platform of the Saltburn Miniature Railway. This rapid response watercourse was regularly inundating the miniature railway and washing away both river bank and the sub base the tracks are laid on. The erosion was taking place on the outside of a sharp bend in the watercourse and various methods had pervious been tried to halt the erosion. All of these has subsequently failed leaving an area of bare earth with embedded pieces of gabion basket and other failed erosion protection measures.

A feasibility study was then undertaken considering the following options:

Do nothing

Use of local tree root balls to be imbedded in the bank with willow revetment

Use of vegetated bags with large stone revetment

Inclined gabion stone baskets.

Sheet piles with coir matting, willow faggots and rock rolls

A matrix scoring each option against environmental, economic and technical criteria was created and option 5 was selected offering erosion protection, flood protection and environmental benefits.

Detailed design, specification, construction drawings, method statement and environmental risk assessment were produced to allow the flood risk activity permit to be granted and the contractor to undertake the work. The works were undertaken in line with the methods statement approved by the Environment Agency which included a number of silt curtains and use of biodiesel.

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Forest Halt

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Northumbria River basin Tees Subcatchment River name Skelton Beck Catch (Saltburn) trib of North Sea Area category 10 - 100 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) 328328 m <br />0.328 km <br />32,800 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB103025071970 Site Edit site Name Forest Halt, Saltburn Valley Gardens WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Protected species present No Invasive species present No Species of interest Dominant hydrology Dominant substrate River corridor land use Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 5050 m <br />0.05 km <br />5,000 cm <br /> Project started 2017/10/11 Works started 2018/07/17 Works completed 2018/08/28 Project completed 2018/09/04 Total cost category more than 10000 k€ Total cost (k€) Benefit to cost ratio Funding sources Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 5000 - 10000 k€ Stakeholder engagement and communication 500 - 1000 k€ Works and works supervision more than 10000 k€ Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Improving local park and protecting infrastructure Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information