Improving Fish Passage on the River Almond Feasibility and Optioneering Study Public Information Meeting 22 September 2018

Project Phases: Work to date: Atkins 2010/11 Mott MacDonald survey work 2014 Current phase: Atkins feasibility and optioneering report Next phase: Design of agreed options Construction works Overview of the phases of the project as a whole 22 September 2018

Existing Information: Sediment Sampling Flood Risk Assessment (where removal considered) Structural Condition Inspection Geomorphology Surveys Ecological Constraints Surveys Fisheries Data Topographic Surveys Utilities Searches 22 September 2018

Selection of Preferred Option Data Collection Optioneering Selection of Preferred Option August 2015 Design Construction 22 September 2018

Data collection that we will be carrying out... - Site Visits - Desk Study of the survey results Stakeholder Engagement Potential aquatic habitat and ecology site visits ecology surveys, riverbank and bed surveys, the silt properties, structural condition of structures, and the lie of the land and services in the area 22 September 2018

Optioneering – Summary of Options Full Removal Partial Removal Bypass Channel Rock Ramp Formal Fish Pass (Larinier) Formal Fish Pass (Pool and Weir) Fish Passage Easement Generic Examples of Options... 22 September 2018

Full Removal Cons Pros Difficult access for large removal works Potential risk to any adjoining structures Changes to upstream river channel Pros Full river connectivity and passage for all fish species Restore natural sediment movement Before After 22 September 2018

Partial Removal Pros Partial river connectivity and passage for all fish species Helps to restore natural sediment movement Cons Difficult access for large removal works Potential risk to any adjoining structures Risk to the structural integrity to the remaining structure Changes to upstream river channel Source: FAO/DVWK, 2002 22 September 2018

Bypass Channel Cons Difficult access for large removal works Pros River connectivity and passage for all fish species Helps to restore natural sediment movement Minimal works to the existing structure Cons Difficult access for large removal works Requires a lot of space around the structure 22 September 2018

Rock Ramp 22 September 2018

Pros Cons Fitted to existing structures Relatively low cost Improved passability for priority species Cons Difficult access for construction works requiring large plant Passage would be centred on salmonids, with less improvement for other species Source: FAO/DVWK, 2002 22 September 2018

Fish Pass Designs – ‘Larinier’ Town Weir, Haverfordwest Louds Mill, River Frome, Dorset Aberdulais, River Neath Fiskerton, Nottinghamshire 22 September 2018

Formal Fish Pass Pros High performance fish pass for salmonids and other large migratory fish Good resilience to flood conditions Cons Often large construction works – difficult access High cost 22 September 2018 Vertical Slot Fish Pass, River Taff, South Wales Pontymoel Fish Pass, River Llwyd, South Wales

Fish Pass Designs – ‘Pool and Weir’ Duddington, Northamptonshire Osbaston, Monmouthshire 22 September 2018

‘Pool and Weir’ Fish Pass Pros High performance fish pass for wide range of species Good resilience to flood conditions Cons Often require very large structures Difficult access for large construction works High cost 22 September 2018

Fish Pass Designs – ‘Easement’ Davidston Burn, Moray Pre-barrages fixed to river bed downstream of existing weir Before After 22 September 2018

Pros Cons River Lugg, Herefordshire Fitted to existing structures Large variety of options Relatively low cost Improved passability for priority species Cons Difficult access for construction works requiring large plant Easement would be centred on salmonids, with less improvement for other species River Lugg, Herefordshire Timber baulk Fixed diagonally onto the downstream face of the weir Provides suitable flow of water to enable fish to swim up and over the structure 22 September 2018

Thank you If you’d like to be kept updated with the project please include your contact details on your feedback form and post it in the box on your way out © Atkins Limited except where stated otherwise. The Atkins logo, ‘Carbon Critical Design’ and the strapline ‘Plan Design Enable’ are trademarks of Atkins Limited. 22 September 2018