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Preferred Scheme

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Following the appraisal of different options a preferred scheme was identified. The preferred scheme comprises flood defence walls and embankments, flood gates, flow control structures, drainage works and the replacement of the lock gates in the port.

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Around 27km of flood defence walls and embankments will be built. These will vary in height along different sections of the river according to the specific flood risk in each area. In public and residential areas the walls will feature a variety of attractive stone or patterned concrete finishes and coping stones designed to complement the area. In some locations they will also feature large glass viewing panels allowing people views of the river helped, in places, by raised footpaths.

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Improved drainage infrastructure, including new underground pumping stations will be constructed, to remove excess water emanating from the town in the event of heavy rains and/or inability of water to drain into the watercourses when river levels are high.

 

Diversion and protection of the many public utility services such as gas, water and telephone connections will be carried out to allow construction of the flood defences and ensure continuity of service at all times.

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Details of the proposed works in each of the flood cells can be found below:

Flood cells plan - click image to view larger map

Flood Cells

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Click map to zoom

Hover over the images below for a description of the main works proposed for each flood cell. When hovering, click on the text to load a map showing the flood defence locations. The defence locations on these maps are the same as those shown at Consultation Event No. 2. Revised updated plans are being developed and will be published when complete.

FLOOD CELL 1

  • over 4km of flood defences in the form of walls and grassed embankments with an average height of 1.5m

  • fencing on top of flood defences where required,

  • bank protection system on the wet-side of the flood defence,

  • realignment of footpaths

  • drainage improvements

  • flood gates / barriers across footpaths and roads,

  • plant over 300 trees and landscape reinstatement

FLOOD CELL 4

  • over 9km of flood defence walls and grassed embankments with an average height of 1.3m,

  • drainage improvements,

  • bank protection,

  • flood gates / barriers across footpath, roads and railway line

  • plant over 900 trees,

  • reline the flood relief channel,

  • flow control structure on the Grange Burn,

Description of the defences proposed in cell 2
FLOOD CELL 2

  • over 1km of flood defences in the form of walls and grassed embankment with an average height of 1.2m,

  • possible bank protection works to stabilise the existing bank,

  • potential to extend the existing Charlotte Dundas footpath,

  • drainage improvements,

  • flood gates / barriers across footpaths and roads,

  • landscape improvements,

Description of the defences proposed in cell 3
FLOOD CELL 3

  • over 4km of flood defences walls and grassed embankments with an average height of 1.5m,

  • rock revetment on the wet-side of flood defence,

  • drainage improvements,

  • flood gates / barriers across footpaths and roads,

  • new flood / lock gates at the port entrance, 

  • working within the Port of Grangemouth

FLOOD CELL 5

  • nearly 5km of flood defence walls and grassed embankments with an average height of 1.75m,

  • drainage improvements,

  • bank protection of the wet-side of the flood defence,

  • flood gates / barriers across footpaths and roads,

  • working within the Petrochemical plant,

FLOOD CELL 6

  • over 3.5km of flood defence walls and grassed embankments with an average height of 2.4m,

  • rock revetment on the wet-side of the flood defence,

  • drainage improvements,

  • flood gates / barriers across footpaths and roads,

  • create compensatory habitats,

  • working on the edge of the Firth of Forth SPA

Tree Felling

 

In many flood risk areas, development of roads, footpaths and buildings has taken place right up to the very edge of the rivers. The position of existing buildings, roads and footpaths makes them vulnerable to flooding but also dictates the position and type of defences which can be built to protect homes, businesses and people. 
 
Unfortunately, in some instances the only location new flood defences can be constructed is in place of existing trees . This means that some trees will have to be felled in order to accommodate the proposed flood defences. Further information on tree felling and tree planting can be found here.

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