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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.


2009 - NZ - Using Otta Seals for Dust Suppression


2009 - NZ - Using Otta Seals for Dust Suppression

The Otta seal is a low-cost seal option used in developed and developing countries for seal extension and resurfacing treatments. The technique is called ‘Otta seal’ because it was first developed and trialled in the Otta Valley in Norway, in 1963, as an inexpensive seal-extension treatment. After its initial success in the Norwegian trial, the use of the treatment spread throughout developing countries in Asia and Africa, and life cycles of up to 25 years are reported from South Africa.

This report describes a successful trial of the use of a simplified version of the Otta seal as a method for minimising dust emissions from gravel roads in New Zealand. It also compares the performance and cost effectiveness of the Otta seal with traditional dust minimisation techniques.

File Name: 2009_nz_dust_supression_otta_seals.pdf
File Size: 7.4 MB
File Type: application/pdf
Hits: 619 Hits
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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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