Ear to the Ground - Spring 2013 - (Page 17)

FEATURE B Y L AW R E N C E A R C A N D, P. E N G , P R E S I D E N T, T 2 U T I L I T Y E N G I N E E R S I N C . ECLRT AND SUE Natural Transit Partners S ubway or LRT… While the battle raged on between the various layers of government about the Eglinton Crosstown LRT (ECLRT) project one thing was clear—subsurface utility engineering (SUE) mapping services were going to be a key aspect towards the success of the project. The ECLRT project is one of the largest major infrastructure projects in the province and around the country. It is designed to improve commuter S P R I N G 13 transportation across an EW corridor along Eglinton Avenue. The project started as a TTC initiative and is now being run as a Metrolinx project. The current plan calls for combination of both below grade tunnels and at grade lines, along with numerous stations—see www.thecrosstown.ca for more information. From early stages of the project the TTC/Metrolinx recognized that although this was a major transportation project it was also an equally large utility infrastructure project. Based on the successes they achieved on other projects, such as the TTC Union Station 2nd Platform expansion project, they decided early on that a comprehensive SUE mapping investigation would be completed during the preliminary design stage of the project that would assist with the overall design and coordination of the project. ECLRT is not the only major transit project using SUE to help manage utility items. The Ottawa LRT, Edmonton LRT, York VIVA BRT, Durham Hwy 2 BRT are other large profile transit projects gaining success by using SUE. Methodology Used for the Project The first stage in the process was the collection of records information from all utilities within the project areas. Requests were sent to all utility companies to provide records information, including the City of Toronto. A special trip was made to the City of Toronto vault to review record drawings for the area. All information was compiled and used to provide with data for field staff. The next stage was the actual collection of field data. There are a number of different mapping technologies that can be used for mapping utilities. Three of the more prominent techniques were used for this project—electromagnetic pipe and cable locate equipment; ground penetrating radar; and CCTV cameras with sondes. The various technologies were used to mark out the horizontal location of utilities on the ground. The marks were then surveyed and based on the professional engineer’s judgment of the field data and records information the horizontal location was placed onto the Microstation drawing. Confined-space entry techniques were used to gather invert and chamber dimension data at key locations. There are several large diameter trunk sewers running through the project area that will act as a critical control for the overall depth and location of the new tunnels. 17 http://www.thecrosstown.ca http://www.orcga.com

Table of Contents for the Digital Edition of Ear to the Ground - Spring 2013

PRESIDENT’S MESSAGE
GET THE WHOLE PICTURE
811 LOGO TO BE FEATURED AT NASCAR SPRINT CUP SERIES RACES THIS YEAR
WHERE WE ARE TODAY
10TH ANNIVERSARY SYMPOSIUM
BILL 8 IS LAW: NOW WHAT?
ECLRT AND SUE – NATURAL TRANSIT PARTNERS
HALL OF FAME/MEMBER OF THE YEAR
PAST MEMBER OF THE YEAR AWARDS AND HALL OF FAME INDUCTEES
EXCAVATOR OF THE YEAR AWARDS
IMPORTANT INFORMATION: REVISED FEE SCHEDULES – EFFECTIVE: MAY 1, 2013
INDEX OF ADVERTISERS

Ear to the Ground - Spring 2013

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