Joint CIWEM Engineers Ireland Presentation

12TH November 2014

PRESENTERS / PRESENTATION CONTENTS

Thomas Cooney

Supervisor

Part 1

Scheme Overview

Part 4

Conclusion

Paul McSparran

Contracts Manager

Part 2

Construction

Alan McWatters

CEEQUAL Assessor

Part 3

CEEQUAL Process

Part 1 Catchment

Flooding History

Scheme Overview

Catchment

Catchment Size – 55km²

Main Stream length – 22km

Q100 – 63m³/s

History of Flooding October 1987 –

highest on record

December 2000

August 2008

October 2011

Q100 Flooded Area

St Ciaran’s School

Ballygawley Village

Scheme Objectives Provide Q100 protection to

St. Ciaran’s High School (Site 1)

No.’s 8, 9 and 11 Tullybryan Rd (Site 1)

No. 28 Tullybryan Rd (Site 2)

Residential & Commercial Properties within Ballygawley Village (Site 3)

Enhance the river environment

Undertake the works in a sustainable manner

Scheme Overview

Site 3 Site 1

Site 2

Site 1 – St.Ciarans School • 700m of sheet

piled & reinforced

concrete wall

• 60m of flood

embankment

• 600m of back

drainage

• Installation of

fishery enhancement

measures

Site 1

Site 1

Site 2 – Tullybyran Rd • 160m of reinforced

concrete wall

• 150m of culvert

upgrade

• 115m of back

drainage

• Reinstatement of garden area

Site 2

Site 3 – Ballygawley Village • Removal of

existing

embankment

• 240m of kingpost

concrete floodwall

• 50m of

landscaped flood

embankment

• 250m of back drainage

Site 3

Bridge Replacement • Upgrade of

Tullybyran Rd

Bridge

• Partnership with

Roads Service

• Works completed

prior to flood

alleviation scheme

Culvert Upgrade • Upgrade of

Feddan Drain

Culvert

• Partnership with

Roads Service

• 1200mm Ø pipe to

twin 900mm Ø pipe

Part 2 - Construction

Management

Options

PAUL MCSPARRAN – CONTRACTS MANAGER BSG

Value Engineering

Savings Delivered:

• Use of vacant

offices

• Sheet pile trials

and redesign

• Use of precast

walls

Value Engineering

Savings Delivered:

• Use of 100 pour liner and review

of layout to

maximise shutter

use

• Rationalisation of

rebar design to

minimise

wastage

• Alternative coping detail

Programme

Time Savings:

• Good relationship

with adjacent

landowners

• Flexible

subcontractors

• Early engagement

with utilies, DCAL,

client etc.

• Programming to

provide a fall back

option

• Completion

achieved 4 months

ahead of schedule

Challenges

• King Post Piling

• Maintaining existing

flood protection

• Existing Services

• Reducing noise and

vibration from sheet

piling

Challenges

• Working close to a

school and nursery

• Maintaining access

for people and

animals

• Poor weather

conditions during

reinstatement

Sustainability

Reuse of excavated

material

Reuse of temporary

roads

All works completed

from the river banks

Sustainability Channel

Improvements

Fishery Measures

Project submitted

for Considerate

Constructors &

CEEQUAL Scheme

Health & Safety Works completed

successfully in

sensitive location

10749 man hours

completed with no

accidents

Regular contact

with school, nursery

and locals reduced

risks to all

Part 3 - CEEQUAL

Management

Options

ALAN McWATTERS – CEEQUAL ASSESSOR RIVERS AGENCY

CEEQUAL – a Brief Introduction Sustainability assessment and

awards scheme for civil engineering projects.

Celebrates the achievement of high environmental and social performance.

Aims to deliver improved project specification, design and construction of civil engineering works.

Encourages performance above legal, environmental and social minima.

CEEQUAL – How it works

Rivers Agency CEEQUAL History Moneymore Flood

Protection Scheme

Construction Only Award

Excellent (93%)

Lodge Burn Flood Alleviation Scheme

Whole Team Award

Excellent (76.4%)

Ballygawley Water Flood Alleviation Scheme

SUSTAINABILITY PERFORMANCE ASSESSMENT

Whole Team Award

Client – DARD Rivers Agency

Designer – DARD Rivers Agency

Constructor – BSG Civil Engineering

Assessor – Alan McWatters, DARD Rivers Agency

Verifier – David Fisher, The Design Environment

Ballygawley Water FAS Sustainable planning from the start

Environmental Enhancement

Fishery Enhancement

Electro Fishing Survey

Otter Holt

Environmental Protection

Green Barrier

Invasive Species

Neighbour Interactions

Community Amenity

Opportunities for the Unemployed

Minimal Construction Waste

Value Engineering

Sustainable thinking from the start Feasibility Study and Economic Appraisal considered Social, Economic

and Environmental impacts and benefits of the proposed project

Flood protection delivered to residential, commercial and social properties

Climate change fully incorporated within the design process

Overall delivering this flood alleviation scheme will provide more sustainable living to the community it serves

Fishery Enhancement Measures

• Water environment enhancement considered within all capital works schemes

• Liaison and site investigation with DCAL Inland Fisheries and RA Environment Section

• Fishery habitat units included in scheme to improve environment for UKBAP significant species

Fishery Enhancement Measures

Pool

Nursery D-Groyne

Electro Fishing Monitoring Survey

Fish are stunned with an electric current

Safely collected from a 10 metre length of channel

Species and size recorded to calculate density

Safely released back into the watercourse

Undertaken at both a control and the enhancement site

2013 – Pre Enhancement Works

2014 – Post Enhancement Works

Total Salmonid Biomass

Otter Holt Construction

Otter footprints identified

Loss of vegetation in this area

Agreed best area for artificial holt with RA Environment Section

Included Otter Holt construction with project

Environmental Protection

Green Barrier

Environmental Protection

Temporary Upstream Barrier

Mature Tree Retention

Invasive Species – Japanese Knotweed

•Followed Environment Agency JKW remediation flow chart •7 metre radius supervised excavation zone •Buried contaminated soil over 2 metres depth in root membrane •Plant tracks washed before leaving site

Neighbour Interactions

•Promoting Civil Engineering in St. Ciarans College

•Existing culvert pipes retained for reuse by landowner

•Existing fence around St. Ciarans retained for reuse

•Back drainage amended after concerns raised by local resident

Community Amenity

•Created new public amenity footway over flood wall tie in to high ground •Reckli patterned formwork finish to all exposed surfaces for reduced visual impact •Both the above points were well received from community feedback questionaire

Opportunities for the Unemployed Contract documents specified the need for provision

of work experience through the DEL Steps to Work (StW)Programme

BSG carried out 2 periods of interviews with possible StW candidates

Sam Managh was employed on a 13 week training experience placement

Sam is now a full time

employee of BSG Civil

Engineering

Minimal Construction Waste

KPI’s to monitor waste reduction and recycling

99.9% of non hazardous waste was reused on site

All excavation material re-profiled onsite

Waste segregation and recycling implemented

Materials ordered and stored appropriately

Haul road stone reused throughout project

Value Engineering

NEC3 Option C incentivises value engineering

Reduced material usage through reduction in sheet pile section – saving of 270T of steel.

Re-design of coping equated to 60m3 concrete saving

Precast embankment wall

Benefits of using CEEQUAL

Delivery of a more sustainable project

Improved public relations and perception

Environment protected and enhanced

Enhanced Team Spirit - Provided a target for the project team to deliver high performance and developed a positive attitude

Increased interest within construction workforce about environmental issues

Cost Savings through Value Engineering and reduced material wastage

Part 4 - Conclusion

Management

Options

CONCLUSIONS

• Flood protection up to 1% AEP provided

for Ballygawley

• Improvement to fisheries habitat and river environment

• Project completed ahead of schedule

• Awarded CEEQUAL Excellent award

Questions