Leica Geo to Supply WSDOT with Customized GPS

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<p><strong>Norcross, Ga. &mdash; Aug. 31</strong><br />Leica Geosystems is supplying a global positioning system (GPS) to the Washington State Department of Transportation (WSDOT) for monitoring the Mercer Slough bridge interchange.  </p><p>The system will be used for proactive monitoring of this key infrastructure outside of the Seattle metropolitan area. <br /><br />”The automated Leica GPS monitoring system provides a cost-effective method for WSDOT to maintain public safety and develop effective bridge repair plans” said George Comstock, regional bridge inspection engineer. “This continuous monitoring system provides highly accurate and timely information that significantly contributes to meeting our mission.”</p><p>Mercer Slough interchange consists of several bridges dating from the 1940s through the 1990s that carry the Interstate 90 mainline and ramps in Bellevue, Wash.  </p><p>These structures were built over the Mercer Slough, a broad, flat, peat-filled wetland.  </p><p>Over the past four decades, ongoing lateral movement of the 60-foot-thick peat deposit has resulted in damaging deflections to the pile supported structures and a major waterline that runs parallel to I-90.  </p><p>To develop a permanent, long-term repair to the existing bridges and to aid in the design of new structures, WSDOT determined that accurate, quantitative data were needed.<br /><br />Leica Geosystems&#39; monitoring system provides this valuable data, and it consists of field-proven technology that delivers millimeter level motion detection.  </p><p>”We are extremely pleased to be providing this advanced bridge monitoring technology to WSDOT,” said Gerard Manley, Leica Geosystems vice president of engineered solutions. “Our system offers the marketplace an attractive and efficient solution for real-time bridge monitoring.”</p><p>The technology deployed precisely measures superstructure deflections in real time, and it provides automated alarms when movement exceeds predetermined thresholds.  </p><p>The GPS monitoring system, combined with the close working relationship between WSDOT and Leica Geosystems, illustrates the importance of collecting accurate quantitative data to aid in transportation infrastructure management decisions.</p>

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