Arbroath (Brothock Water) Flood Protection Scheme

Consultation drawings

Brothock Meadows Flood Storage Area

Operation no Description of operation

Operation 1 Brothock Meadows FSA General Arrangement

Operation 1 Brothock Meadows Plan and Sections

Operation 1 Brothock Meadows Details

Brothock Meadows flood storage area consists of a rock fill embankment with sheet pile cut off. The embankment will be grassed over its entire length. The dam crest will act as a multi stage spill arrangement. The downstream face and the initial apron will consist of grassed hollow concrete block to provide erosion protection. The conduit through the embankment will be a 900mm square reinforced box culvert. Baffles will be included within the culvert to hold natural bed gravels.

St Vigeans Flood Storage Area

Operation no Description of operation

Operation 2 St Vigeans FSA General Arrangement

Operation 2 St Vigeans Plan and Sections

Operation 2 St Vigeans Southern Embankment

St Vigeans flood storage area consists of a rock fill embankment with impermeable core and cut off. The embankment will be grassed over its entire length. The dam crest will act as a multi stage spill arrangement. The downstream face and the initial apron will consist of grassed hollow concrete block to provide erosion protection. The flow control structure consists of a short culvert section, total length 3m. The culvert section will span bank to bank and the culvert height will be approximately the height of the existing river training walls. The channel bed will be reinforced along the length of the flow control arrangement. A debris capture / trash screen will be located some distance upstream of the control structure to capture any large debris that could lead to the blockage of the control structure.Six box culverts 1.5m wide by 0.7m high will be installed through the railway embankment to connect the two parts of the Brothock Water floodplain that is intersected by the railway embankment.

 

Hercules Den Flood Storage Area

Operation no Description of operation

Operation 3 Hercules Den FSA General Arrangement

Operation 3 Hercules Den Embankment and Typical Section

Hercules den flood storage area consists of a grassed earth fill embankment with sheet pile cut off along Park View. A short section of flood wall will provide an entrance to the park and support for a flood gate across the entrance. Ground levels adjacent to Kirkton Road will re-profiled to provide a consistent spill level and grassed. A new screen arrangement will be provided at the culvert inlet within Hercules Den to ease future maintenance.

 

Operation no Description of operation
Operation 4 Remedial works to trash screen and erection of post and rail fence across to prevent debris from by-passing screen at upstream end of town.
Operation 5 Sheet piled wall with concrete cope and fence along the top. Maximum defence height of 1.0m. Wall length 20m.
Operation 6 Flood doors on existing gauging station building. Stilling well pipe to be extended above flood level within gauging station building. Short section of existing brick wall to be rendered to provide flood protection and new concrete cope added. Wall length 5.5m.
Operation 7, 8, 9

7. Existing reinforced concrete flood wall is to be raised by 260mm. Wall length 13m.

8. Existing reinforced concrete flood wall is to be raised by 200mm. Wall length 30m.

9. Existing reinforced concrete flood wall is to be raised by 160mm. Wall length 65m.

Operation 10 Existing reinforced concrete bridge parapet upstand to be raised by 330mm.
Operation 11, 12

11. Existing reinforced concrete flood wall next to scrap yard to be raised by 300mm. Wall length 55m.

12. Existing reinforced concrete flood wall next to business centre to be raised by 300mm. Wall length 30m.

Operation 13

Construction of reinforced concrete retaining wall behind existing masonry wall. Typical defence height 400mm. Defence length 13m.

Operation 14 Construct new brick wall to close flow path along access path. Regrade path to prevent ponding of water behind wall. Wall height 800mm and length approximately 2m.
Operation 15 Construct new brick wall to close flow path along access path. Regrade path to prevent ponding of water behind wall. Wall height 900mm and length approximately 2m.
Operation 16

Construction of reinforced concrete retaining wall behind existing masonry wall. Typical defence height 1.6m above protected ground and 900mm above existing defence level. Defence length 48.5m.

Operation 17 Construct block work walls within old openings to reinforce the existing brickwork.
Operation 18

Construction of reinforced concrete retaining wall behind existing masonry wall. Typical defence height 1.6m above protected ground. Defence length 23m.

Operation 19 Existing wall to have brick current brick infill replaced with sandstone blocks of the same dimensions as the existing sandstone elements of the wall. Defence length 30m.
Operation 20 Construction of reinforced concrete retaining wall with sheet pile cut off behind existing masonry wall. Typical defence height 1.6m above protected ground. Defence length 32m.
Operation 21 Existing parapet wall to be rendered to provide additional waterproofing. New cope to be added to the top of the wall. Defence length 11m.
Operation 22

Construct new flood defence wall consisting of brickwork wall with coping stone. Defence height 220mm and wall length 4.5m. Steel angle to be added along edge of concrete platform to provide additional defence. Length of angle along edge of platform 7m.

Operation 23 Raise existing brick wall through the addition of further bricks and coping stone. A new handrail will also be installed. Wall length 60m.
Operation 24 New brick wall and coping stone. Wall length 3.6m.
Operation 25

Construct new flood defence wall consisting of brickwork wall with coping stone. Defence height 190mm and wall length 3m.

Operation 26

Grassed earth bund with sheet pile cut off. Maximum defence height 750mm. Wall length 42m.

Operation 27 New RC floodwall with sheet pile cut off. New hand railings along wall cope. Maximum defence height 600mm. Wall length 32m.
Operation 28, 29

28. Construct new RC flood wall. Maximum defence height 260mm above current ground level. Tie new wall to existing RC river training wall. Wall length 19m.

29. Construct new RC flood wall. New hand railings along wall cope. Maximum defence height 260mm above current ground level. Tie new wall to existing masonry river training wall. Wall length 18m. Provision of concrete footing to wall to prevent further scour.

Operation 30 Add steel angle to bridge parapet to increase standard of protection. Approximate length 18m.
Operation 31

No defence requirements – provision of step access into watercourse to allow access for future maintenance and new guardrail provided to protect the edge.

Operation 32, 1 of 2 Render existing masonry wall to provide additional waterproofing. Length of Wall 70m. Construct RC outer wall to existing masonry wall over 33m length.
Operation 32, 2 of 2  
Operation 33 New RC flood wall with masonry cladding Maximum height to river bed 2.44m, defence height 540mm. New pedestrian handrail included on top of the proposed wall. Wall length 11m.
Operation 34 Add steel angle to bridge parapet to increase standard of protection. Approximate length 17m.
Operation 35 Construct new brick wall to close flow path along access path. Regrade path to prevent ponding of water behind wall. Wall height 800mm and length approximately 2m.
Operation 36, 37

36. Glass flood barrier to be fixed over windows.

37. Block up boarded up window in cellar of public house.

Operation 38

Construct new RC flood wall. Inclusion of hand rail along the wall copes. Maximum defence height 460mm above current ground level. Tie new wall to existing masonry river training wall. Wall length 29m.

Operation 39 Extend existing wall across access stone steps. Infill behind wall with structural fill up to existing ground level.