Borders Flood Studies

How is flood risk managed by the Council? • The Flood Risk Management () Act 2009 aims to prioritise flood mitigation across Scotland using a proactive and risk based process for assessing flood risk. • This approach led to the preparation of SEPA’s Flood Risk Management Strategies by SEPA and the Solway Local Flood Risk Management Plan developed by Dumfries and Galloway Council with input from Scottish Borders Council relating directly to Newcastleton. • These plans identified specific communities as being at risk and in need of a detailed flood study to help inform the management of flood risk in each community.

Which communities are being assessed? • Broughton, Peebles & Innerleithen • Newcastleton Borders Scheme • Earlston Flood considered Flood Risk Studies against Management (2017-18) national Strategy and priorities How will Flood Protection Potentially Local Flood (2018/19) Schemes be prioritised? Vulnerable Risk Areas Management • SEPA will prioritise nationally where National Plan (2016) funding should be allocated. Flood Risk • The reports and findings of our Assessment (2011) study will inform this process. Flood Risk Management (Scotland) Act 2009 BDEDFC

D SU E MQNXI TVVP

D SU EF MQNXI TVVP

D SU EC C MQNXI TVVP

F SR WJQRV HI GJWJZ F USX R KQ\ ONY ZTQZVU I TVVP LZ[P]D SU EBEF NU P EC C MQNXI TVVP J NWWSUR LSTYUQOPWJR M MJWJKJV N DHGBCC C UQOPWDBCE Number of Properties at Flood Risk

Climate Change The 1 in 200 RP (years) event was also assessed with a 33% allowance for climate change added to the flow. This resulted in a total of 319 properties being at risk in Newcastleton. Pre 1960’s - River Bank Walled Allotments and Fencing

North Liddle St/Whitchester Lane

South Liddle St/Doncaster Street OPTION 1B SUMMARY. This option aims to provide a high standard of protection through the installation of a number of Newcastleton flood walls, earth embankment and flood gates as well as the

removal of riparian sediment and vegetation. Where space LIDDEL WATER LIDDEL allowed an earth embankment has been used in place of a flood Option 1B: Liddel Water wall. The proposed work is displayed over two drawings, drawing AEM-JBAU-NC-CS-IM-C-1403 and New suite of flood defences with diversion AEM-JBAU-NC-CS-IM-C-1404. A summary of the proposed work which provide a 200 year standard of protection, inclusive of a 300mm freeboard on all walls, is as follows:

channel to provide up to a 200 year AEM-JBAU-NC-CS-IM-C-1403 NORTH HERMITAGE STREET HERMITAGE NORTH · Construct earth embankment from the residential property north Standard of Protection. Drawing 1 of 2 of the mart, along North Hermitage Street, along the boundary EMBANKMENT TO BE AT 101.17mAOD of the mart and south to the rear boundary of properties of AND APPROXIMATELY 435m LONG Houghton Park. Approximate embankment length of 435m with approximate height of 1.6m to a maximum level of LEGEND 101.17mAOD. GRAVEL SEDIMENT REMOVAL AREA · Construct floodwall (FLOODWALL A) along rear boundaries of WALL DEFENCE properties along Houghton Park for a distance of Approximately 205m to Henry Street, to a maximum level of 100.87mAOD FLOODGATE ACROSS EXISTING WATERCOURSE ACCESS TRACK (maximum height of 1.3m). · Installation of two or more flood gates to provide access through

LIDDEL WATER LIVESTOCK MOVEMENT flood defences. DURING FLOODS · Construct floodwall (FLOODWALL B) along North Liddle Street to South Liddle Street. Approximate wall length 571m to a

NORTH HERMITAGE STREET HERMITAGE NORTH maximum level of 100.2mAOD (maximum height of 1.5m). · AEM-JBAU-NC-CS-IM-C-1404 · Construct floodwall (FLOODWALL C) from the flood gate at Walter Street to the basketball court along the inside edge of FLOODWALL A. TOP OF WALL AT 100.87mAOD the green, along South Hermitage Street and following the road

AND APPROXIMATELY 205m LONG edge to tie into the abutment of the stone arch bridge. HOUGHTON PARK HOUGHTON

MOSS PLACE HOUGHTON PARK HOUGHTON 200 YEAR WATER LEVEL ROAD WALL HEIGHT PROPERTY approximate wall length 565m, 97.55mAOD (maximum height

NORTH HERMITAGE STREET HERMITAGE NORTH 100 YEAR WATER LEVEL APPROXIMATELY 1.3m BOUNDARY HOUGHTON PARK HOUGHTON PARK of 1.3m). 75 YEAR WATER LEVEL A · Construct floodwall (FLOODWALL D) from stone arch bridge south along Liddel Water's west bank for approximately 226m, A MOSS PLACE to a maximum level of 96.92mAOD (maximum height of 2m). TREE REMOVAL AREA · Charlie Sike meandered with floodplain restoration. A new MOSS PLACE HENRY STREET HENRY STREET HENRY STREET diversion channel is to be created to convey flow from both the

FLOODGATE ACROSS Charlie Sike and Short Sike. The new diversion channel will ACCESS TRACK confluence with the Liddel Water downstream of the stone arch bridge. Details are provided in Option 3.

OLIVER PLACE

The above wall and embankment heights are to protect to a 200 NORTH HERMITAGE STREET HERMITAGE NORTH year standard of protection, a lower standard of protection would reduce wall heights. The cross sections indicate the 200 year, NORTH LIDDLE STREET 100 year and 75 year peak water level. LIDDEL WATER LIDDEL Drawing to be read in conjunction with the following:-

WHITCHESTER LANE WHITCHESTER LANE SECTION A-A WHITCHESTER LANE WHITCHESTER LANE AEM-JBAU-NC-LW-IM-C-1404 FLOODWALL B. TOP OF WALL APPROXIMATELY 100.2mAOD AND

APPROXIMATELY 571m LONG NORTH LIDDLE STREET LIDDLE NORTH

POTENTIAL FLOODGATE NORTH HERMITAGE STREET HERMITAGE NORTH

MONTAGU STREET MONTAGU STREET WHITCHESTER STREET WHITCHESTER STREET Comments WHITCHESTER STREET B 200 YEAR WATER LEVEL WALL HEIGHT 100 YEAR WATER LEVEL APPROXIMATELY 1.5m B 75 YEAR WATER LEVEL Rev.: Date Drawn Designed Checked Approved Client Approval A - Approved B - Approved with Revisions

MID LIDDLE STREET

DOUGLAS SQUARE C - Do Not Use Purpose of Issue Status STREET LANGHOLM STREET DONCASTER STREET DONCASTER STREET DONCASTER STREET Suitable for Coordination S1

FOOTPATH COULD BE Unit 2.1 Quantum Court RAISED TO HELP REDUCE Research Avenue South POTENTIAL FLOODGATE RELATIVE WALL HEIGHT Heriot Watt University EH14 4AP UNION STREET UNION STREET UNION STREET

SOUTH LIDDLE STREET www.jbaconsulting.com t +44 (0)131 3192940 f +44 (0)845 8627772 LIDDEL WATER e [email protected]

Offices at Coleshill, Doncaster, Edinburgh, Exeter, Glasgow, Haywards Heath, Isle of Man, Leeds, Limerick, SECTION B-B Newcastle upon Tyne, Newport, Peterborough, Saltaire, Skipton, Tadcaster, Thirsk, Wallingford and Warrington

Project

SOUTH HERMITAGE STREET HERMITAGE SOUTH Borders Flood Studies

200 YEAR WATER LEVEL WALL HEIGHT SOUTH LIDDLE STREET FOOTPATH PROPERTY Title GEORGE STREET GEORGE STREET GEORGE STREET 100 YEAR WATER LEVEL APPROXIMATELY 1.3m BOUNDARY Newcastleton

SOUTH LIDDLE STREET 75 YEAR WATER LEVEL Liddel Water: Option 1B C New Suite of Direct Defences with a Diversion Channel

C for

Client SOUTH HERMITAGE STREET HERMITAGE SOUTH

COPSHAW PLACE STOPFORD STREET STOPFORD STREET

SEE OPTION 1B - 200 POTENTIAL FLOODGATE YEAR FLOOD WALLS SOUTH LIDDLE STREET DRAWING 2 OF 2 The property of this drawing and design vested in Jeremy Benn Associates Ltd. It shall not be reproduced in whole or in part, nor disclosed to a third party, without the prior written consent of Jeremy Benn Associates Ltd. ASHWELL PLACE WALTER STREET WALTER STREET LIDDEL WATER Scale Drawn: S. Brandon 27/07/18 Designed: M. Mcmillan 22/07/18 This map is reproduced from Ordnance Survey material with the permission of the Ordnance Survey on behalf of the controller As Shown @ A1

of Her Majesty's Stationery Office. (c) Crown Copyright. Unauthorized reproduction infringes Crown Copyright and may lead to Checked: M. McMillan 12/09/18 SCOTT STREET SCOTT prosecution or civil proceedings. Crown copyright and database rights (2018) Ordnance Survey (100023423) Approved: A. Pettit 13/09/18 F

Project Number: 2017s5526 SOUTH HERMITAGE STREET HERMITAGE SOUTH PLAN SECTION C-C Drawing Number Revision 1:2000 AEM-JBAU-NC-CS-IM-C-1403 P04 OPTION 1B SUMMARY. This option aims to provide a high standard of protection through the installation of a number of MID LIDDLE STREET FLOODWALL B. TOP OF WALL DOUGLAS SQUARE Newcastleton flood walls, earth embankment and flood gates as well as the APPROXIMATELY 100.2mAOD AND APPROXIMATELY 571m LONG removal of riparian sediment and vegetation. Where space LANGHOLM STREET LANGHOLM STREET LANGHOLM STREET DONCASTER STREET DONCASTER STREET DONCASTER STREET allowed an earth embankment has been used in place of a flood Option 1B: Liddel Water wall. The proposed work is displayed over two drawings, drawing AEM-JBAU-NC-CS-IM-C-1403 and New suite of flood defences with diversion AEM-JBAU-NC-CS-IM-C-1404. A summary of the proposed work UNION STREET UNION STREET UNION STREET which provide a 200 year standard of protection, inclusive of a SOUTH LIDDLE STREET 300mm freeboard on all walls, is as follows: channel to provide up to a 200 year Standard AEM-JBAU-NC-CS-IM-C-1403 SEE OPTION 1B - 200 LIDDEL WATER YEAR FLOOD WALLS · Construct earth embankment from the residential property north DRAWING 1 OF 2 of Protection. Drawing 2 of 2 of the mart, along North Hermitage Street, along the boundary of the mart and south to the rear boundary of properties of

Houghton Park. Approximate embankment length of 435m with SOUTH HERMITAGE STREET HERMITAGE SOUTH approximate height of 1.6m to a maximum level of 101.17mAOD. LEGEND GEORGE STREET GEORGE STREET GEORGE STREET · Construct floodwall (FLOODWALL A) along rear boundaries of WALL DEFENCE SOUTH LIDDLE STREET properties along Houghton Park for a distance of Approximately C 205m to Henry Street, to a maximum level of 100.87mAOD EXISTING WATERCOURSE (maximum height of 1.3m). C

SOUTH HERMITAGE STREET HERMITAGE SOUTH · Installation of two or more flood gates to provide access through COPSHAW PLACE STOPFORD STREET STOPFORD STREET PROPOSED WATERCOURSE flood defences.

ABANDONED CHANNEL · Construct floodwall (FLOODWALL B) along North Liddle Street SOUTH LIDDLE STREET to South Liddle Street. Approximate wall length 571m to a maximum level of 100.2mAOD (maximum height of 1.5m).

ASHWELL PLACE WALTER STREET WALTER STREET LIDDEL WATER AEM-JBAU-NC-CS-IM-C-1404 · Construct floodwall (FLOODWALL C) from the flood gate at Walter Street to the basketball court along the inside edge of

CHARLIESTREET SCOTT SIKE FLOODPLAIN RESTORATION AND the green, along South Hermitage Street and following the road DIVERSION AS PER OPTION 3. D

SOUTH HERMITAGE STREET HERMITAGE SOUTH edge to tie into the abutment of the stone arch bridge. SEE DRAWING No. WALL HEIGHT SCOTT STREET approximate wall length 565m, 97.55mAOD (maximum height AEM-JBAU-NC-CS-IM-C-1200 APPROXIMATELY 1.3m of 1.3m). 200 YEAR WATER LEVEL D 100 YEAR WATER LEVEL · Construct floodwall (FLOODWALL D) from stone arch bridge 75 YEAR WATER LEVEL south along Liddel Water's west bank for approximately 226m,

SHORT SIKE to a maximum level of 96.92mAOD (maximum height of 2m).

· Charlie Sike meandered with floodplain restoration. A new SOUTH HERMITAGE STREET HERMITAGE SOUTH BUCCLEUCH TERRACE diversion channel is to be created to convey flow from both the E ED Charlie Sike and Short Sike. The new diversion channel will FLOODWALL C. TOP OF WALL APPROXIMATELY 97.55mAOD AND confluence with the Liddel Water downstream of the stone arch APPROXIMATELY 565m LONG TO bridge. Details are provided in Option 3. A MAXIMUM HEIGHT OF 1.3m HIGH The above wall and embankment heights are to protect to a 200 year standard of protection, a lower standard of protection would

LIDDEL WATER

SOUTH HERMITAGE STREET HERMITAGE SOUTH SECTION D-D reduce wall heights. The cross sections indicate the 200 year, 100 year and 75 year peak water level. Drawing to be read in conjunction with the following:- HOLMFOOT

AEM-JBAU-NC-LW-IM-C-1403 B6357 WALL HEIGHT Comments APPROXIMATELY 1.3m ROAD INVESTIGATE LOWERING 200 YEAR WATER LEVEL OF EMBANKMENT 100 YEAR WATER LEVEL Rev.: Date Drawn Designed Checked Approved 75 YEAR WATER LEVEL Client Approval A - Approved

B - Approved with Revisions LIDDEL WATER LIDDEL C - Do Not Use

F Purpose of Issue Status S1

FLOODWALL D. TOP OF WALL B6357 APPROXIMATELY 96.92mAOD AND

APPROXIMATELY 226m LONG Unit 2.1 Quantum Court Research Avenue South Heriot Watt University Edinburgh EH14 4AP United Kingdom F www.jbaconsulting.com SECTION E-E t +44 (0)131 3192940 f +44 (0)845 8627772 e [email protected]

Offices at Coleshill, Doncaster, Edinburgh, Exeter, Glasgow, Haywards Heath, Isle of Man, Leeds, Limerick, Newcastle upon Tyne, Newport, Peterborough, Saltaire, Skipton, Tadcaster, Thirsk, Wallingford and Warrington

Project

Borders Flood Studies B6357 Title WALL HEIGHT Newcastleton APPROXIMATELY 2.0m Liddel Water: Option 1B 200 YEAR WATER LEVEL New Suite of Direct Defences with a Diversion Channel 100 YEAR WATER LEVEL 75 YEAR WATER LEVEL for Client

INVESTIGATE LOWERING OF EMBANKMENT

The property of this drawing and design vested in Jeremy Benn Associates Ltd. It shall not be reproduced in whole or in part, nor disclosed to a third party, without the prior written consent of Jeremy Benn Associates Ltd.

Scale Drawn: S. Brandon 27/07/18 Designed: M. Mcmillan 22/07/18 This map is reproduced from Ordnance Survey material with the permission of the Ordnance Survey on behalf of the controller As Shown @ A1 of Her Majesty's Stationery Office. (c) Crown Copyright. Unauthorized reproduction infringes Crown Copyright and may lead to Checked: M. McMillan 12/09/18 prosecution or civil proceedings. Crown copyright and database rights (2018) Ordnance Survey (100023423) Approved: A. Pettit 13/09/18 Project Number: 2017s5526 PLAN SECTION F-F Drawing Number Revision 1:2000 AEM-JBAU-NC-CS-IM-C-1404 P04 OPTION 3 SUMMARY. The option would consist of re-sectioning of the channel of Charlies Sike and the green space along its bank to re-naturalise the channel. In the past the Newcastleton river bed was artificially constructed to align to a straight narrow LANGHOLM STREET ditch to coincide with the property boundaries. Naturalisation FLOODPLAIN aims to restore rivers to a state closer to their original course by WIDENING Option 3: Charlies Sike Restoration removing hard engineering and other restrictive structures. In STARTS this case, meandering straightened sections and re-grading of banks is proposed to incorporate floodplain volume for flood New Open Channel & Floodplain to storage within the banks to reduce flood risk on properties.

NEW SINUOUS provide 200 year SOP CHANNEL APPROX 450m LONG TO CONNECT TO CHARLIE SHORT SIKE NEW DIVERSION CHANNEL BEGINS

SIDE SLOPES MAY NEED TO BE ARMOURED OR STABILISED IF THE ABANDONED RAILWAY IS REINSTATED LEGEND EXISTING CHANNEL TO BE ABANDONED, BACKFILLED THROUGHOUT AND EXISTING EMBANKMENT PROPOSED CHANNEL EXCAVATED CHANNEL LANDSCAPED IN SOME CHANNEL TO HEIGHT TO BE AT AREAS BE FILLED IN EXISTING TOP OF 200 YEAR EXISTING WATERCOURSE A BANK WATER LEVEL PROPOSED WATERCOURSE A ABANDONED WATERCOURSE

EXISTING GROUND

PROPOSED GROUND

200 YEAR WATER LEVEL SECTION A-A 1:200

200 YEAR WATER LEVEL SHORT SIKE

COPSHAW PLACE

Comments SECTION B-B 1:100 Rev.: Date Drawn Designed Checked Approved Client Approval A - Approved SCOTT STREET B - Approved with Revisions ASHWELL PLACE C - Do Not Use Purpose of Issue Status Suitable for Coordination S1

Unit 2.1 Quantum Court Research Avenue South PROPOSED SIDE SLOPES MAY NEED TO BE Heriot Watt University SCOTT STREET Edinburgh CHANNEL TO HAVE ARMOURED OR STABILISED IF THE EH14 4AP BANK PROFILE AT ABANDONED RAILWAY IS REINSTATED United Kingdom 1:1 SLOPES www.jbaconsulting.com t +44 (0)131 3192940 f +44 (0)845 8627772 e [email protected]

Offices at Coleshill, Doncaster, Edinburgh, Exeter, Glasgow, Haywards Heath, Isle of Man, Leeds, Limerick, 0.35 SOUTH HERMITAGE STREET Newcastle upon Tyne, Newport, Peterborough, Saltaire, Skipton, Tadcaster, Thirsk, Wallingford and Warrington

Project

1.00 Borders Flood Studies

Title SHORT SIKE EMBANKMENT SLOPES B Newcastleton TO TIE IN WITH SHORT Charlie Sike: Option 3 SIKE PROFILE B BUCCLEUCH TERRACE New Open Channel & Floodplain TYPICAL CROSS-SECTION THROUGH NEW CHANNEL for DIVERSION CHANNEL Client TIES BACK INTO 1:50 EXISTING PROFILE

FLOODPLAIN SOUTH HERMITAGE STREET WIDENING ENDS

The property of this drawing and design vested in Jeremy Benn Associates Ltd. It shall not be reproduced in whole or in part, nor disclosed to a third party, without the prior written consent of Jeremy Benn Associates Ltd.

Scale Drawn: S. Brandon 27/07/18 Designed: M. Mcmillan 22/07/18 This map is reproduced from Ordnance Survey material with the permission of the Ordnance Survey on behalf of the As Shown @ A1 controller of Her Majesty's Stationery Office. (c) Crown Copyright. Unauthorized reproduction infringes Crown Copyright and Checked: M. McMillan 12/09/18 may lead to prosecution or civil proceedings. Crown copyright and database rights (2018) Ordnance Survey (100023423) Approved: A. Pettit 12/09/18 Project Number: 2017s5526 PLAN Drawing Number Revision 1:1000 AEM-JBAU-NC-CS-IM-C-1200 P01

SOUTH HERMITAGE STREET Preferred Scheme Option

The preferred scheme option is to provide a 1 in 200 year level of protection (no climate change allowance) to Newcastleton from both the Liddel Water and the Lakes.

Liddel Water Option 1 Direct Defences • Embankment in show field approx. 435 long • Flood Wall from North Liddel Street down to playing fields, protecting polysport, routing around boundary of football pitch to tie into road bridge, incorporating flood gates. • Flood Wall continuing downstream on right bank from road bridge for a distance of 226m. (Note - If the re-routing of the Sike option below is not feasible, additional flood walls will be required along the Sikes to mitigate the flood risk from the Liddel Water backing up.)

Charlie Sike/Short Sike Natural Flood Management Option • Charlie Sike - abandon existing channel and create new channel and restore flood plain, creation of amenity area. • Short Sike – Abandon Short Sike channel after coming under old railway and re-route along with Charlies Sike south through fields and under road, discharging into Liddel Water downstream of waste water treatment works. (Note this option was highlighted by the community and requires further investigation going forward) ESTIMATED SCHEME COST - £12m Resident ideas/concerns for consideration

• Localised dry gravel removal; • Lowering of embankments - reconnecting floodplains • Impacts of newly planted trees on left bank opposite North Liddle Street; • Flood gate locations for access to river; • Glass panels in flood scheme walls; • Reconfigure alignment of North-Mid-South Liddle Street to wetside of wall. • Consideration of Lakes Amenity Area. Community Engagement Timeline

• June 2019 – Sept 2019 - Community Consultation including public display of flood scheme plans

• August 2019 - Plans will be on display until August in Buccleuch House

• The Community will be encouraged to complete feedback forms for comment

• 13th August Community Council Meeting - Online/paper survey will be made available

• September 2019 - Outcome of public survey announced

• October 2019 - November 2019 - If a favourable outcome is received SBC will report to Council its desire to proceed with a flood scheme for Newcastleton to National Prioritisation.

• December 2019 – June 2020 – SEPA National Prioritisation Exercise

• Establish Community Liaison Working Group to work with SBC

• Liaise with other communities who have been through flood scheme development to seek insight and feedback

• Visit communities who have had flood schemes recently constructed.