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Welcome to Chris Bennett's and Lis Pedersen's web site. If you are looking for information Chris' current work on affordable housing, please visit www.mygbhousing.info. The video below tells the background to Chris' project.


2007 – World Bank - The Otta Seal Surfacing An economic and practical alternative to traditional bituminous surface treatments


2007 – World Bank - The Otta Seal Surfacing An economic and practical alternative to traditional bituminous surface treatments

Prepared for the World Bank, this

publication has two main objectives:


• To summarise more than 25 years of experience with the global use of Otta seals and to provide technical evidence and economic justifications for its consideration for use

in all countries.

• to provide state-of-the-art information on the provision of the Otta seal surfacing as an economic and practical alternative to more traditional surface treatments.


The publication will provide the required guidance to a wide range of stakeholders including politicians, practitioners, consultants and contractors, as well as material suppliers, donors, road users and, importantly, Road Authority personnel - who may be considering the use of the Otta seal in their countries.


By promoting an innovative approach to the provision of bituminous surface treatments, this publication will undoubtedly lead to a more efficient use of available resources. This will result in direct benefits to many countries and will facilitate socio-economic growth and development and much needed poverty reduction. This publication also provides a useful list of references on the design, construction and maintenance of Otta seals.

File Name: 2007_wb_otta_seals.pdf
File Size: 1.68 MB
File Type: application/pdf
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Created Date: 25-06-2019
Last Updated Date: 21-03-2018


Chris in the NCT Race 

Chris has an adventurous spirit which generally involves cycling, running, or just being out there having a good time. Read his 'Race Reports' below. This is a link to his SPOT GPS tracker. If you are interested in his 'geeky' sport technical blog it is at www.tri-duffer.com. He also has stories of his life as 'An Overtravelled Engineer Working for the World Bank' at World Bank Traveller.


Race Reports


Document Library


  • Chris' published papers and reports are here.
  • His Technical Library  has a range of reports 
  • Golden Bay community projects are here.
  • The history of the ROMDAS company is here.
  • The 'Road to Good Health' HIV/AIDs Toolkit is here.


Technical Library

Chris and Lis

Chris and Lis

We are Lis Pedersen and Chris Bennett. We’ve been married over 30 years and each found our way to New Zealand in the early 1980s from Denmark and Canada respectively. Golden Bay has been our happy place for almost 20 years and we are now based in Pohara just above the beach, with our two cats Coco and Max. 




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