Featured Project: TTC Subway Survey

Monteith and Sutherland crews worked on a comprehensive survey for the TTC‘s Bloor-Yonge and Pape stations.

Soheil Namdari, pictured above, lead one of the Survey crews completing the control and topographic surveys at Pape Station. The survey crews performed precise traversing and levelling from local City of Toronto control monuments to Pape station. A street-level topopgraphic survey around Pape Station was completed for future planning purposes. We also searched for boundary evidence and completed a cadastral survey to confirm the Pape Station property limits.

At Bloor-Yonge Station project, the crews traversed and levelled from local City of Toronto control monuments to platform level, and then into the tunnels. The control network was then adjusted and used to coordinate the High-Definition Laser Scanning campaign. The challenge of the project has been the time constraints and limited work windows to ensure regular TTC services are not impacted. The use of a HD-scanner was imperative to get big volumes of detailed data as quickly as possible. Our Leica P40 Leica scanner is very quick and of the high precision.


Featured Project: Peel Region Sewer Tunnel Verification

Our crews have been busy assisting Technicore Underground Inc. with verifying the tunnel alignment and ensuring the correctness of the traverse. The survey crews have performed precise traversing from the surface into the tunnel heading.

The long distance to get underground is challenging, and along with varying ambient conditions in the tunnel can cause significant error in the traverse. To mitigate that, and to ensure the highest accuracy of the traverse, our crews used a gyroscopic theodolite, which is one of the few available in Canada. We use a DMT GYROMAT3000, that is the most accurate north-seeking precision-surveying gyroscope in the world. The GYROMAT helps us obtain most accurate azimuths, and thus mitigate accumulative errors in the underground control networks, notably in the long-driven tunnels.

The tunnel being mined is part of the Region of Peel’s East Trunk Sewer twinning to improve wastewater service and allow for growth on the system. The Region of Peel has commissioned the installation of a large sanitary sewer pipe along Erin Mills Parkway, Lincoln Green Way and Lincoln Green Close.

 

 

Featured Project: Cherry Street Lakefill Hydrographic Survey

Glenn Dawson, and his crew braved the cold and icy weather to collect bathymetric data around the Essroc Quay. The crew equipped a nineteen-foot Boston Whaler boat with a single beam echosounder.

The sounder obtains depth data at a predetermined frequency as the boat moves around the harbour along a pre-planned runlines. A GNSS unit collects positional data of the transducer in real time.

This task was completed as part of Cherry Street Stormwater and Lakefilling project which is the first step to improve the area for reuse and naturalization.

 

Featured Project: HWY 600 Vertical Control

On a recent project in Rainy River, 1,800km northwest of Toronto, Monteith & Sutherland established precise elevations along Highway 600 using digital levels and invar rods, and by implementing first order levelling procedures. Check out the video below!

M&S guest lectures at UNB

Monteith & Sutherland had a fantastic weekend presenting at the University of New Brunswick for the department of Geodesy and Geomatics Engineering. It was a privilege to collaborate with Dr. Robert Kingdon and provide students with a laboratory assignment using our DMT Gyromat 3000, a precision gyroscope used to correct underground traverse orientation.

And not to mention, Dr. Kingdon, along with the outstanding faculty, and our own company president Glenn Dawson (a graduate from the class of ’88), demonstrated why UNB is a world leader in geomatics academia.

For more information on the Geodesy and Geomatics Engineering program at UNB, click here.

University of Waterloo Industry Night

On Thursday March 16, Monteith & Sutherland helped represent the geomatics industry at the industy night organized by the Civil, Environmental and Geological Engineering Society of the University of Waterloo. The evening brought together industry professionals from a variety of firms representing different fields of study within Civil, Environmental and Geological Engineering. We met a lot of students and shared our experiences working on projects alongside Geological/Geotechnical Engineers completing deformation monitoring on various structures to ensure the on-going safety of construction activities. Special thanks to Grant Mitchell, Vice President of the Society, for putting together such a well-organized event.

IEC Safety Management Certified

Monteith & Sutherland has successfully completed the Safety Management Assessment (SMA) certification program developed by the Industrial Education Cooperative, assessed by the Sarnia-Lambton Industrial Educational Cooperative (IEC). The certification is awarded after a 3-year audit process which includes annual reviews of company policies and field visits to observe safety in action. The SMA was created in 2002, and has evolved through a series of revisions to the current integrated audit format, which provides a comprehensive analysis of an organization’s safety management practices. The audit consists of 12 elements that range from legislated safety management requirements to hazard identification and safety management practices in the field. Today more than 250 local, provincial and national contracting companies complete this audit as part of the local industrial plant pre-qualification requirements.

February Featured Project: Rapid Static GNSS Campaign

Task Overview: Rapid Static GNSS Campaign:

Technician Mark Paddey (pictured above) is documenting survey station parameters and diagramming the vicinity and any obstructions. Monteith & Sutherland established 16 control monuments along a 10km stretch of Highway 600. We used a classical static survey technique to establish our control values over such a large area. The rapid static GNSS technique using our Leica GNSS 1200 receivers can provide accuracies to the order of 1:5,000,000. Using our equipment, the accuracy expectations for horizontal coordinates are 3mm + 0.5ppm and vertical coordinates are 6mm + 0.5ppm, which are unmatchable over large distances with other survey techniques. Mark worked in conjunction with 3 to 4 other staff who established other receivers. Data is recorded on all receivers simultaneously at the same data rate, typically 5 seconds. Observation time for the rapid static campaigns are based on the length between the occupied points and also based on the number of available satellites. At least 4 satellites are required to resolve Latitude, Longitude, Height, and Receiver Time Offset. For this project, we completed two initial 2-hour baseline campaigns followed by shorter observation times on successive campaigns measuring each new point. This allowed us to properly complete the data reduction and post-processing of the satellite data and publish accurate coordinate for these new control monuments.