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Mactaquac Dam

SECTOR: Dams & Levees

Kingsclear, NB

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Monitoring deformation behaviour caused by Alkali-aggregate reaction

Located on the Saint John River, the Mactaquac Dam has an operating capacity of over 650 megawatts. Initially projected to last until 2068, Alkali-aggregate reaction (AAR) within the concrete used in the powerhouse and spillway has significantly reduced the dam’s expected 100-year lifespan. AAR causes the concrete within these structures to swell and crack, requiring constant monitoring and annual maintenance at a substantial cost.

NB Power engineers use several technologies to monitor deformation behaviour in the structures. One of these is inverted pendulums that measure the overall tilt of the dam intake, powerhouse, and spillway gate. However, the pendulums’ low deformation tolerance and expensive installation costs led engineers to install ShapeArray because of its wider tilt tolerance.

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1993 1994 1995 1999 2001 - 10 2002 2004 2005 - 08 2006 2007 2011 2014 2017
  • 1993

    The Beginning

    Measurand is established in Fredericton, New Brunswick
  • 1994

    Bend sensor development

    Measurand develops and patents fiber optic bend and position sensors for the medical and automotive sectors

    U.S. Patent 5,321,257

  • 1995

    Canadian Space Agency

    Receives funding from the CSA to develop sensor technology that ultimately leads to invention of ShapeTape

    U.S. Patent 5,633,494

  • 1999

    Patent on fiber optic sensor

    Measurand receives patent for "Fiber Optic Bending and Positioning Sensor" issued June 29, 1999

    Canadian Patent 2,073,162

  • 2001

    ShapeTape & ShapeHand debut

    Measurand designs and develops innovative motion capture technology

    U.S. Patent 6,127,672, 6,563,107

  • 2002

    Measurand Attends the ICPMG

    First contact with the geotechnical sector at the International Conference on Physical Modelling in Geotechnics (ICPMG)
  • 2004

    ShapeArray

    Design patent application sent about a new product designed to meet the specific needs of the geotechnical industry

    U.S. Patent 6,127,672, 6,563,107

  • 2005-08

    ShapeWrap

    Measurand debuts ShapeWrap motion capture technology for the film and animation industry

    U.S. Patent 7,296,363

  • 2006

    Malibu installation

    ShapeAccelArray installed for ground monitoring for the first time​ in Malibu, CA

    Canadian Patent 2,472,421

  • 2007

    ShapeMRI

    Suite of instrumentation developed for motion capture within Magnetic Resonance Imaging (MRI) machines

    U.S. Patent 7,296,363

  • 2011

    SAAScan launched

    Built for rapid deployment and repeated use

    Canadian Patent 2,472,421

  • 2014

    SAAX launched

    Purpose-built for heavy-duty horizontal installation

    Canadian application 2,815,199 & 2,815,195

  • 2017

    SAAV launched

    The only geotechnical instrument with a patented cyclical installation method

    Cyclical Sensor Array, Canadian application 2,815,199 & 2,911,175