2 A Picture of North Hertfordshire

See attached

See attachment

The Bedfordshire and River Ivel Internal Drainage Board makes the following comments to your proposed Local Plan 2011 -2031 consultation.

The Plan does not adequately address Flood Risk and should be amended to strengthen the requirements of addressing flood risk and development, particularly in the north of the District in Letchworth and Baldock.

Below are some examples of paragraphs which should be redrafted to ensure development does not have a detrimental effect on flooding:

2.29 The Plan states fluvial flooding is not a huge issue. However, Stotfold and Arlesey have experienced significant flooding in the past both from the River Ivel and Pix Brook, which is exacerbated from the run off from Letchworth and Baldock.

2.78 The paragraph must include infrastructure that is required to accommodate growth as SuDS which are strategic, integrated and maintained. This is critical given the scale of development in Letchworth (900+ houses) and Baldock (2800 + houses).

3.6 The spatial vision of high quality sustainable design and managing flood risk needs to refer to the provision of strategic and integrated SuDS, which include effective and funded SuDS maintenance.

4.73 Policy SP7. This infrastructure should include SuDS and flood risk management, such that a public authority can ensure drainage infrastructure operates as designed in the future.

4.131 Policy SP11. It is inadequate to state that this Plan 'seeks'.... when other policy state 'will'. The Policy should state the Plan will deliver the provision of strategic and integrated SuDS that will be maintained.

4.136 For clarity, WFD seeks to meet good ecological "potential" for heavily modified and artificial water bodies, as well as good ecological "status" for natural water bodies.

4.137 The Plan states fluvial flooding is not a huge issue. However, Stotfold and Arlesey have experienced significant flooding in the past both from the River Ivel and Pix Brook, which is exacerbated from the run off from Letchworth and Baldock.

SP14. Downstream of Baldock is Stotfold which has experienced flooding from the River Ivel. This policy must accommodate for this development policy to provide strategic, integrated and maintainable SuDS to reduce catchment flood risk.

SP15. Downstream of Letchworth is Stotfold which has experienced significant flooding from the Pix Brook and the River Ivel. This policy must accommodate for this development policy to provide strategic, integrated and maintainable SuDS to reduce catchment flood risk.

NE7. There is a requirement to reduce the existing flood risk in Stotfold immediately downstream of the urban runoff areas of Letchworth and Baldock, as in SP14 and SP15, this Policy should be strengthened to include mitigation being designed and implemented on development sites to attenuate flows c) and d). It is fundamental that flood risk is minimised and that functional and effective infrastructure is provided that is maintainable in addition to items e).

NE8. This Policy should include strategic, integrated and maintainable SuDS for all sources of flood risk, and not just surface water, particularly given that flood risk exists from the Ivel and Pix Brook. The area is heavily modified with public storm sewers, modified watercourses and large flood attenuation reservoirs (Pix Brook), so any solution for development needs to be appropriate to the scale of development, rather than simply mimic the natural drainage pattern.

NE8 and 11.59. For developments draining in the Ivel and Pix Brook catchment, the Council and developers should also consult the IDB, as well as the Lead Local Flood Authority and the EA.

NE9. For any development in the Bedfordshire and River Ivel IDB district, a developer will be required to comply with the Board's Byelaws including maintaining a minimum 7 m wide undeveloped buffer zone for ordinary watercourses and applying the land drainage consenting regime.

I trust you find the Board's comments clear and informative.

See attached

See attached