site ref shw0420 sfra ref 65 site name€¦ · sfra ref 71 site name delafield heights north,...
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![Page 1: Site Ref SHW0420 SFRA Ref 65 Site Name€¦ · SFRA Ref 71 Site Name Delafield Heights North, Longland Way / Pettifer Way, High Wycombe Size (Ha) 3.321 Proposed Development Type Residential](https://reader033.vdocuments.us/reader033/viewer/2022052806/606038a4376e8672274d965b/html5/thumbnails/1.jpg)
B127F005-01 B125
Site Ref SHW0420
SFRA Ref 65
Site Name Land to the rear of Quebec Road, High Wycombe
Size (Ha) 0.180
Proposed Development Type Residential
No. Units 5
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B126
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low or Low risk of surface water flooding, with small around along the southern and western extents at Medium or High risk. A surface water flow path runs along the western extent (Low to Medium risk) with another (of High risk) to the south of the site. The site‐specific FRA would need to consider:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a result
of the development will not detrimentally affect third parties;
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B127F005-01 B127
Groundwater Flood Risk
© Copyright JBA Consulting – 2017 Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated. JBA groundwater mapping indicated the groundwater depth beneath the entire site is greater than 5m.
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B127F005-01 B128
Sewer Flooding Risk
This site is located in postcode region HP13. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 6 to 10
External sewer flooding = 11 to 15
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 65 (SHW0420) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Surface water and groundwater flood risk
Investigate opportunities to provide betterment to properties downstream of the surface water flow path by intercepting and retaining it on‐site
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B127F005-01 B129
Site Ref SHW0564
SFRA Ref 71
Site Name Delafield Heights North, Longland Way / Pettifer Way, High Wycombe
Size (Ha) 3.321
Proposed Development Type Residential
No. Units 32
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not at risk of fluvial flooding from the River Wye, it is approximately 900m outside FZ2.
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B127F005-01 B130
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low or Low risk of surface water flooding. A number of existing roads and associated flow paths run through the site, and consequently parts of the site are at High risk. The adjacent Chairborough Road and Chiltern Avenue are at High risk. The site‐specific FRA would need to consider:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a result
of the development will not detrimentally affect third parties;
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B127F005-01 B131
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP12. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 6 to 10
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B127F005-01 B132
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 71 (SHW0564) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103 and located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Surface water flood risk
Investigate opportunities to provide betterment to properties downstream of the surface water flow path by intercepting and retaining it on‐site
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B127F005-01 B133
Site Ref SHW0400
SFRA Ref 72
Site Name Delafield Heights South, Longland Way / Pettifer Way, High Wycombe
Size (Ha) 0.546
Proposed Development Type Residential
No. Units 40
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B134
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is generally at Very Low risk of surface water flooding, with relatively small areas at Low risk towards the west and north of the site. The adjacent Chairborough Road is at High Risk. There is also a flow path running south to north to the east and north of the site, and consequently this land is at High risk.
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B127F005-01 B135
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP12. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 6 to 10
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B127F005-01 B136
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 72 (SHW0400) Flood Risk Recommendations
The applicant should address the following as part of the planning application for the site development:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Risk of surface water flooding
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B127F005-01 B137
Site Ref SHW0421
SFRA Ref 78
Site Name Netley Works, 89 Queens Road, High Wycombe
Size (Ha) 0.185
Proposed Development Type Residential
No. Units 11
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not directly at risk of fluvial flooding from the River Wye, it is approximately 85m outside FZ3a.
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B127F005-01 B138
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is generally at Low risk of surface water flooding, with a relatively small area at High risk towards the north of the site. The adjacent Gordon Road is at High Risk.
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B127F005-01 B139
Groundwater Flood Risk
© Copyright JBA Consulting – 2017 Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated. JBA groundwater mapping indicates the groundwater depth beneath the site is between 0.5m and 5m.
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B127F005-01 B140
Sewer Flooding Risk
This site is located in postcode region HP13. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 6
External sewer flooding = 13
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 78 (SHW0421) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
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B127F005-01 B141
The feasibility of infiltration measures
Risk of surface water flooding, including the avoidance of development within the Medium and High risk surface water flood extents within the boundary
Risk of groundwater flooding
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B127F005-01 B142
Site Ref SHW0561
SFRA Ref 80
Site Name Notcutts Garden Centre, Clay Lane, High Wycombe
Size (Ha) 0.908
Proposed Development Type Residential
No. Units 15
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B143
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low risk of surface water flooding, with an area towards the east at High risk. The adjacent Clay Lane is at High risk. The uFMfSW identifies a surface water flow path through the site from the north, although there are no properties immediately downstream that might benefit from measures to intercept it.
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B127F005-01 B144
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region SL7. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 9
External sewer flooding = 38
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B127F005-01 B145
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 80 (SHW0561) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Develop the site in such a manner to avoid encroachment into Medium and High risk surface water flood risk zones. If the development does encroach into the WCDA:
o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak water level (plus an allowance for climate change);
o Demonstrate that the flow path can be maintained, or modifications to it as a result of the development will not detrimentally affect third parties;
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B127F005-01 B146
Site Ref SHW0406
SFRA Ref 81
Site Name Ogilvie Road, High Wycombe
Size (Ha) 0.209
Proposed Development Type Residential
No. Units 9
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not directly at risk of fluvial flooding from the River Wye, it is approximately 170m outside FZ2.
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B127F005-01 B147
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low risk of surface water flooding, with an area towards the east at High risk, which may be the result of rainfall filling a depression as a result of the modelling used to develop the flood extents. The adjacent Lindsay Avenue is at Low risk.
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B127F005-01 B148
Groundwater Flood Risk
© Copyright JBA Consulting – 2017 Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated. JBA groundwater mapping indicates the groundwater depth beneath the site is between 0.5m and 5m.
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B127F005-01 B149
Sewer Flooding Risk
This site is located in postcode region HP12. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 6 to 10
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 81 (SHW0406) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS
The feasibility of infiltration measures
![Page 26: Site Ref SHW0420 SFRA Ref 65 Site Name€¦ · SFRA Ref 71 Site Name Delafield Heights North, Longland Way / Pettifer Way, High Wycombe Size (Ha) 3.321 Proposed Development Type Residential](https://reader033.vdocuments.us/reader033/viewer/2022052806/606038a4376e8672274d965b/html5/thumbnails/26.jpg)
B127F005-01 B150
Risk of surface water flooding, avoiding encroachment into the WCDA
Risk of groundwater flooding
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B127F005-01 B151
Site Ref HW21
SFRA Ref 86
Site Name Land at Queensway, Hazlemere, High Wycombe
Size (Ha) 3.965
Proposed Development Type Cemetery
No. Units n/a
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B152
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is not at risk of surface water flooding; Amersham Road to the north is at High risk.
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B127F005-01 B153
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP15. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 1 to 5
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B127F005-01 B154
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 86 (SHZ0041) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103. The applicant should address the following as part of the planning application for the site development:
Consideration of safe access during a surface water flood event if access is via Queensway
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B127F005-01 B155
Site Ref RUR10
SFRA Ref 97
Site Name Land to the Rear of Stokenchurch Business Park, Mill Lane, Stokenchurch
Size (Ha) 2.922
Proposed Development Type Business
No. Units n/a
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B156
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low risk of surface water flooding. A section of the adjacent M40 motorway is at Medium to High risk.
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B127F005-01 B157
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP14. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 2
External sewer flooding = 34
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B127F005-01 B158
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 97 (SSC0043) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103. The applicant should address the following as part of the planning application for the site development:
Safe access and egress during a surface water flood event if access is via the south‐west
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B127F005-01 B159
Site Ref RUR12
SFRA Ref 101
Site Name Uplands Conference Centre, Four Ashes, Cryers Hill
Size (Ha) 7.608
Proposed Development Type Residential
No. Units 59
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B160
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low risk of surface water flooding with a small area at Medium Risk in the centre of the site, adjacent to the existing building.
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B127F005-01 B161
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is located within an area that is at very low risk of groundwater emergence.
Sewer Flooding Risk
This site is located in postcode region HP15. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 1 to 5
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B127F005-01 B162
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 101 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103. The applicant should address the following as part of the planning application for the site development:
Risk of surface water flooding
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B127F005-01 B163
Site Ref SBE0050
SFRA Ref 105
Site Name Windrush House, Bourne End
Size (Ha) 0.149
Proposed Development Type Residential
No. Units 8
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not directly at risk of fluvial flooding from a tributary to the Thames (Lower) or the River Wye, it is approximately 280m outside FZ2.
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B127F005-01 B164
Surface Water Flood Risk
Surface Water Flood Risk Summary: Both the site and the adjacent Roman Way are at High risk of surface water flooding.
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B127F005-01 B165
Groundwater Flood Risk
© Copyright JBA Consulting – 2017 Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated. JBA groundwater mapping indicates groundwater depths of between 0.5m and 5m.
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B127F005-01 B166
Sewer Flooding Risk
This site is located in postcode region SL8. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1
External sewer flooding = 18
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 105 (SBE0050) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a
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B127F005-01 B167
result of the development will not detrimentally affect third parties;
Investigate opportunities to provide betterment to properties downstream of the surface water flow path by intercepting and retaining it on‐site
Risk of groundwater flooding
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B127F005-01 B168
Site Ref HW16
SFRA Ref 107
Site Name Wycombe Airpark 1 Intensification Sites
Size (Ha) 12.992
Proposed Development Type Industrial
No. Units n/a
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B169
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site is at Very Low risk of surface water flooding. Very small areas within the site boundary are at Low to High risk.
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B127F005-01 B170
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in on the border between postcode regions SL7 and HP14. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 10
External sewer flooding = 16 to 20
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B127F005-01 B171
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 107 (Wycombe Ai) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Develop the site in such a way as to avoid encroachment into High and Medium risk surface water flood risk areas based on the uFMfSW
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B127F005-01 B172
Site Ref HW16(b)
SFRA Ref 108
Site Name Wycombe Airpark 2 Southern Expansion Area
Size (Ha) 15.51
Proposed Development Type Industrial
No. Units n/a
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B173
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low risk of surface water flooding, the adjacent Clay Lane is at High risk.
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B127F005-01 B174
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region SL7. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 9
External sewer flooding = 38
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B127F005-01 B175
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 108 (Wycombe Ai) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103.
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B127F005-01 B176
Site Ref PR13
SFRA Ref 111
Site Name Town Centre site: Land fronting New Road (Back Lane), Princes Risborough
Size (Ha) 2.066
Proposed Development Type Mixed use (retail and employment)
No. Units N/A
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not at risk of fluvial flooding from the nearby watercourse, it is approximately 660m outside FZ3a.
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B127F005-01 B177
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low or Low risk of surface water flooding, with some relatively small areas at Medium risk. The adjacent High Street to the southwest and A4010 to the southeast are at High risk.
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B127F005-01 B178
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated.
Sewer Flooding Risk
This site is located in postcode region HP27. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 3
External sewer flooding = 20
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B127F005-01 B179
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 111 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103 and located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS
The feasibility of infiltration measures
Risk of surface water flooding
Risk of groundwater flooding
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B127F005-01 B180
Site Ref PR14
SFRA Ref 112
Site Name Town Centre site: Land south of Horns Lane, Princes Risborough
Size (Ha) 0.48
Proposed Development Type Mixed use (retail and employment)
No. Units N/A
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. It is not at risk of fluvial flooding from the nearby watercourse, it is approximately 730m outside FZ2.
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B127F005-01 B181
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low or Low risk of surface water flooding, with an area at Medium to High risk (designated as WCDA) towards the northwest. The adjacent A4010 is at High risk. A site specific FRA should consider the following:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a result
of the development will not detrimentally affect third parties;
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B127F005-01 B182
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence. Consequently, should the development include basements the planning application should include a site‐specific flood risk assessment to demonstrate how the risk of groundwater flooding will be mitigated.
Sewer Flooding Risk
This site is located in postcode region HP27. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 3
External sewer flooding = 20
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B127F005-01 B183
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 112 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is at risk of groundwater flooding and located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Risk of surface water flooding
Risk of groundwater flooding
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B127F005-01 B184
Site Ref PR15
SFRA Ref 114
Site Name Molins Sports Ground
Size (Ha) 4.294
Proposed Development Type Outdoor sports
No. Units 0
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1. The site is bounded by an ordinary watercourse to east. This does not have a flood zone attributed to it, but that may be a result of the scale of flood mapping. A site‐specific FRA would need to consider the risk of flooding from this watercourse and potentially include hydraulic modelling to confirm the risk.
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B127F005-01 B185
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low or Low risk of surface water flooding, with an area at Medium risk towards the west. The adjacent Mill Lane and Crowbrook Road are at High risk.
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B127F005-01 B186
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is located within an area that is at risk of groundwater emergence.
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B127F005-01 B187
Sewer Flooding Risk
This site is located in postcode region HP27. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 3
External sewer flooding = 20
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B127F005-01 B188
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 114 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103 and located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Risk of fluvial flooding from Non‐Main River watercourses
Risk of surface water flooding
Risk of groundwater flooding
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B127F005-01 B189
Site Ref SSC0012
SFRA Ref 124
Site Name Westside Fruit / the Apple orchard, Clay lane
Size (Ha) 0.623
Proposed Development Type Residential
No. Units 11
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B190
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low risk of surface water flooding, a section of the adjacent Clay Lane is at High risk.
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B127F005-01 B191
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region SL7. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 9
External sewer flooding = 38
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B127F005-01 B192
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 124 Flood Risk Recommendations
The applicant should address the following as part of the planning application for the site development:
Safe access and egress during a surface water flood event
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B127F005-01 B193
Site Ref HW11
SFRA Ref 128
Site Name Clay Lane Booker
Size (Ha) 1.973
Proposed Development Type Residential
No. Units 30
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B194
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low risk of surface water flooding, the adjacent Clay Hill is at Medium risk. A section of Clay Lane is at High risk.
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B127F005-01 B195
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region SL7. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 9
External sewer flooding = 38
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B127F005-01 B196
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 128 (SHW0559) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103. The applicant should address the following as part of the planning application for the site development:
Safe access and egress during a surface water flood event if via Clay Lane
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B127F005-01 B197
Site Ref RUR9
SFRA Ref 129
Site Name Land at Wood Farm, Stokenchurch
Size (Ha) 0.645
Proposed Development Type Residential
No. Units 28
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B198
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site itself is at Very Low to Low risk of surface water flooding. Sections of the adjacent Oxford Road and nearby M40 motorway are at Medium to High risk.
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B127F005-01 B199
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP14. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 2
External sewer flooding = 34
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B127F005-01 B200
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 129 Flood Risk Recommendations
None
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B127F005-01 B201
Site Ref HW14
SFRA Ref 132
Site Name Highbury Works/Hazlemere Coach Works, Chestnut Lane, Hazlemere, High Wycombe
Size (Ha) 0.619
Proposed Development Type Mixed use (residential, employment and community uses)
No. Units 14 (residential)
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B202
Surface Water Flood Risk
Surface Water Flood Risk Summary: The site is generally at Very Low risk of surface water flooding, with very small areas at Low risk. Parts of the local road network are at High risk (e.g. Amersham Road and Eastern Dene).
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B127F005-01 B203
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP15. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 1 to 5
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B127F005-01 B204
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 132 Flood Risk Recommendations
The applicant should address the following as part of the planning application for the site development:
Risk of surface water flooding
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B127F005-01 B205
Site Ref RUR11
SFRA Ref 133
Site Name Land at Heavens Above, 16 High Heavens Wood
Size (Ha) 1.137
Proposed Development Type Residential
No. Units 20
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B206
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low risk of surface water flooding. There is a flow path running west to east through the site (designated a WCDA). Consequently, this part of the site is at Medium to Low risk. The nearby Marlow Bottom is at High risk.
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B127F005-01 B207
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region SL7. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 9
External sewer flooding = 38
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B127F005-01 B208
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 133 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103 and located within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a
result of the development will not detrimentally affect third parties;
Investigate opportunities to provide betterment to properties downstream of the surface water flow path by intercepting and retaining it on‐site
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
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B127F005-01 B209
Site Ref RUR5
SFRA Ref 138
Site Name Land at Sidney House
Size (Ha) 1.131
Proposed Development Type Residential
No. Units TBC
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B210
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Very Low risk of surface water flooding, with an area at Low risk towards the east. There are two significant flow paths near to the site, and consequently areas surrounding the site are at High risk.
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B127F005-01 B211
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP14. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 2
External sewer flooding = 34
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B127F005-01 B212
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 138 Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application for this site because it is greater than 1ha in size in accordance with NPPF Paragraph 103. The applicant should address the following as part of the planning application for the site development:
Avoidance of areas of Low surface water flood risk, where possible
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B127F005-01 B213
Site Ref HW19
SFRA Ref 139
Site Name Office Outlet site, Queen Alexandra Road
Size (Ha) 0.45
Proposed Development Type Retail and Employment
No. Units TBC
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B214
Surface Water Flood Risk
Surface Water Flood Risk Summary: The majority of the site is at Low and Very Low risk of surface water flooding, with an area along the eastern boundary at Medium and High risk. Queen Alexandra Road to the north of the site is at High risk of surface water flooding while the A404 is predominantly at Low risk.
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B127F005-01 B215
Groundwater Flood Risk
© Copyright JBA Consulting – 2017 Groundwater Flood Risk Summary: The site is located within an area where between a 25% and 50% of the area is at risk of groundwater flooding. The majority of the site is located within a groundwater emergence zone. JBA groundwater mapping indicates groundwater depths of less than 0.5m in the extreme northern extent of the site with between 0.5m and 5m for the southern sections of the site.
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B127F005-01 B216
Sewer Flooding Risk
This site is located in postcode region HP11. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1‐5
External sewer flooding = 1‐5
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure. However, Queen Alexandra Road (immediately north of the northern site boundary) is at risk of flooding as a result of reservoir failure.
Staples Employment Site Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement long‐term, catchment‐wide reductions in runoff through
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B127F005-01 B217
SuDS and provision of surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Risk of surface water flooding, including the avoidance of development within the Medium and High risk surface water flood extents within the boundary
Risk of groundwater flooding
Site Ref SHW0550
SFRA Ref 140
Site Name Sunnyside and St Johns House
Size (Ha) 0.086
Proposed Development Type Residential
No. Units 5
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B218
Surface Water Flood Risk
Surface Water Flood Risk Summary: The south‐western end of the site is designated as Medium risk of surface water flooding. The site‐specific FRA would need to consider:
Avoidance of encroachment into the WCDAs
If the development does encroach into the WCDA: o Demonstrate that finished floor levels are above the Medium uFMfSW risk peak
water level (plus an allowance for climate change); o Demonstrate that the flow path can be maintained, or modifications to it as a result
of the development will not detrimentally affect third parties
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B127F005-01 B219
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP15. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 1 to 5
External sewer flooding = 1 to 5
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B127F005-01 B220
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 140 (SHW0526) Flood Risk Recommendations
A site‐specific FRA would be required to accompany the planning application because the site is within a WCDA in accordance with NPPF paragraph 103 and Wycombe District Council's relevant policy on flood risk. The FRA should specifically address:
Safe access and egress during a surface water flood event
The opportunity to implement surface water flood risk betterment to downstream properties by intercepting surface water flow paths through the site
The feasibility of infiltration measures
Risk of surface water flooding, including the avoidance of development within the Medium and High risk surface water flood extents within the boundary
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B127F005-01 B221
Site Ref SHW0281
SFRA Ref 142
Site Name Edie Pusey House, 9A Amersham Road, High Wycombe
Size (Ha) 0.179
Proposed Development Type Residential
No. Units 5
Fluvial Flood Risk
Fluvial Flood Risk Summary: The site is located within Flood Zone 1.
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B127F005-01 B222
Surface Water Flood Risk
Surface Water Flood Risk Summary: The entirety of the site and the adjacent highways are at Very Low to Low risk of flooding from surface water.
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B127F005-01 B223
Groundwater Flood Risk
Groundwater Flood Risk Summary: The site is not located within an area that is at risk of groundwater flooding.
Sewer Flooding Risk
This site is located in postcode region HP13. The Wycombe DC SRFA Level 1 Update November 2014 indicates that the following numbers of properties have experienced sewer flooding (internally and externally) in this postcode region, based on data provided by Thames Water (to April 2014):
Internal sewer flooding = 6 to 10
External sewer flooding = 11 to 15
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B127F005-01 B224
Reservoir Failure Flooding Risk
Reservoir Failure Flooding Risk: The site is not within an area at risk of flooding as a result of reservoir failure.
Site 142 (SHW0281) Flood Risk Recommendations
None