Colin Leek

AIT(Civil), MIEAust, CMEngNZ, CPEng, NER, APEC, IPEA, MTech, EMIPWEA

Colin is a founding member of Civil Sciences and Engineering (CSE) and serves as the Principal Engineer, bringing over five decades of unparalleled experience in civil and geotechnical engineering. As a Chartered Professional Engineer, Colin is registered on the National Engineering Register (NER), the APEC Engineer Register, and the International Professional Engineers Agreement (IPEA). His qualifications include an Associateship in Civil Engineering from the Western Australian Institute of Technology and a Master of Technology from Deakin University.

With an exceptional career spanning engineering design, project management, and research, Colin has made significant contributions to advancing sustainable and innovative engineering solutions. His pioneering work in in-situ foamed bitumen stabilisation and research into pavement materials has cemented his reputation as a leader in the field. Colin’s expertise extends to stormwater management, traffic flow analysis, pavement rehabilitation, and major infrastructure projects, where his practical knowledge and technical excellence deliver outstanding results.

Colin is also deeply committed to mentoring the next generation of engineers. Through his involvement in professional committees and research groups, he guides young professionals and fosters sustainable engineering practices. His leadership philosophy prioritises collaboration, innovation, and ethical engineering, ensuring that every project he undertakes aligns with CSE’s commitment to excellence and environmental stewardship.

Professional Expertise:

Pavement and Road Engineering:

• Expertise in urban road rehabilitation, pavement design, and consulting.
• Development of Austroads Guide to Pavement Technology Part 4G Geotextiles and Geogrids.
• Preparation of Austroads Foamed Bitumen Stabilisation Mix Design Procedure.
• Advanced pavement design using EfromD3, CIRCLY, HiPave, and APSDS.
• Implementation of innovative rehabilitation methods, including modified full-depth asphalt and stabilised pavements.

Stormwater Management and Environmental Solutions:

• Comprehensive stormwater design and treatment, including constructed wetlands and living streams.
• Development of Stormwater Management Plans for sustainable infrastructure.
• Notable projects: Bannister Creek Living Stream, Station Street Wetlands, and Liege Street Wetlands.

Research and Development:

• Extensive research into pavement materials, stabilisation techniques, and non-destructive testing methods.
• Contributions to Curtin University reports on recycled concrete road base performance.
• Leadership in trial sections for limestone, asphalt, and stabilised pavements.

Project and Construction Management:

• Oversight of multi-million-dollar works programs, including budgeting and resource allocation.
• Management of construction workforce for diverse projects, with budgets exceeding $10.5 million annually.
• Expertise in spray seals, concrete batching, and advanced rehabilitation techniques.
• Introduction of innovative methods such as slip-lining, pipe-bursting, and pipe relining.

Mentoring and Education:

• Active mentor for young engineers, particularly in pavement and road engineering.
• Lecturer on pavement materials and road engineering, sharing practical insights with emerging professionals.

Publications:

Guidelines and Technical Publications

• Design and Construction Guidelines for the Use of Crushed Recycled Concrete on Local Government Roads in WA – LG TRRIP (2024)
• Austroads Guide to Pavement Technology Part 4G: Geotextiles and Geogrids (2009)

Conference Papers

• Crushed Road Base – IPWEA Conference (1992) [Joint Author]
• Vellgrove Avenue Stabilisation – IPWEA Conference (1993) [Joint Author]
• Insitu Foamed Bitumen Stabilisation – The City of Canning Experience – IPWEA Conference (2000)
• Insitu Foamed Bitumen Stabilisation – Site Investigation and Design Approach – ARRB Conference (2001)
• An Investigation of the Performance Properties of Insitu Foamed Bitumen Stabilised Pavements – IPWEA Conference (2002)
• Review of the Performance of Insitu Foamed Bitumen Stabilised Pavements in the City of Canning – 5th Australian Road Engineering & Maintenance Conference, Melbourne (2010)
• Use of Recycled Crushed Demolition Materials as Base and Sub-Base in Road Construction – Waste and Recycle Conference, Fremantle (2008)
• Review of the Performance of Insitu Foamed Bitumen Stabilised Pavements in the City of Canning – International Conference on Advances in Geotechnical Engineering, Perth (2011)
• An Investigation into the Performance of Recycled Concrete Aggregate as a Base Course Material in Road Pavements – International Conference on Advances in Geotechnical Engineering, Perth (2011)
• Vellgrove Avenue, Canning Vale - A Case Study of Rehabilitation – 20-Year Review – International Conference on Advances in Geotechnical Engineering, Perth (2011)

Journal Articles

• Active Filler Trials for In Situ Foamed Bitumen Stabilised Pavements – Australian Geomechanics Vol 49, No 1 (March 2014)
• Engineering Characterisation for In Situ Foamed Bitumen Stabilised Pavements – Australian Geomechanics Vol 49, No 1 (March 2014)
• The Development of a Fatigue Transfer Function for In Situ Foamed Bitumen Stabilised Pavements – Australian Geomechanics Vol 49, No 1 (March 2014)

Throughout his career, Colin has consistently delivered results in challenging engineering environments, combining innovative solutions with a commitment to excellence. His passion for sustainable practices and mentoring ensures that his contributions extend beyond individual projects to benefit the broader engineering community. Colin’s expertise and leadership continue to position Civil Sciences and Engineering as an industry leader, driving progress in sustainable and resilient infrastructure.