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 Representative Inspection and Condition Assessment Projects Completed by M.E.Andrews and Associates with AMTEC Surveying Limited
PROJECT NAME |
CLIENT, DATE |
INSPECTED |
SIZE RANGE |
COMMENTS |
| Ottawa River Interceptor |
Region of Ottawa-Carleton, 1995 |
3,500 m |
2400 mm |
Surcharged 800 m pull (Sonar only) |
| Trunk Sewer Inspection Program (8 separate trunk sewers) |
Metro Toronto 1996, 97, 98, 99 |
55,000 m |
1200 mm to 3050 mm |
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| Western Interceptor Sewer |
Region of Hamilton-Wentworth, 1996 |
9,000 m |
1850 mm to 2450 mm |
3 sections surcharged (Sonar only) |
| Garrison Creek and Keele Street Trunk Sewers |
City of Toronto, 1997 |
6,000 m |
1850 mm to 2400 mm |
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| Port Dalhousie Trunk Sewer |
Region of Niagara (St. Catherines), 1998 |
3,500 m |
1500 VE to 1650 mm |
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| Various trunk sanitary sewers |
Region of Ottawa-Carleton, 1998, ‘99, ‘00 |
12,000 m |
1200 mm to 2400 mm |
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| Credit River Trunk Sewer |
Region of Peel, 1998 |
17,000 m |
1200 mm to 3050 mm |
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| Etobicoke Creek Trunk Sewer |
Region of Peel, 1999 |
32,000 m |
1200 mm to 2450 mm |
H2S corrosion and up to 2 m/s working velocity |
| Treatment Plant Outfall and Diffusers |
Region of Ottawa-Carleton, 1998 |
3,000 m |
2400 mm |
Diffusers under Ottawa River using Sonar and divers |
| Riverfront Interceptor, Western Main Sewer |
City of Windsor, 1999, 2000 |
12,000 m |
1850 mm to 2150 mm |
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| Eastern Utilitienitars Say Sewer |
City of Windsor, 2000 |
4,000 m |
450 to 675 mm |
VC and VC ‘Block’ sewers with high depth and surcharged conditions inspected mostly with Sonar only |
| Green Creek Collector Sewer |
Region of Ottawa-Carleton, 2000 |
1,500 m |
1500 mm |
980 m pull (TISCIT) |
| River Road/North Bank Interceptor |
Region of Niagara (Welland), 2000 |
4,000 m |
1500 mm to 1850 mm |
800 m and 650 m pulls (TISCIT) |
| Orleans-Cumberland Collector |
Region of Ottawa-Carleton, 2000 |
1,650 m |
1500 mm |
Surcharged 1650 m pull (Sonar only) |
Representative Structural Inspection and Assessment Projects Completed by M.E.Andrews and Associates Limited
PROJECT NAME |
CLIENT,DATE |
SIZE,TYPE |
SCOPE OF WORK |
COMMENTS |
| Western Interceptor Sewer |
Region of Hamilton-Wentworth, 1996 |
2450 mm diameter, concrete lined in rock and overburden |
Structural analysis |
Fractures, running infiltration, concrete damage |
| Green Creek Collector |
Region of Ottawa-Carleton, 1998 |
2100 mm diameter, concrete lined in over-burden |
Structural analysis |
Fractures with active infiltration |
| Credit River Trunk Sewer |
Region of Peel, 1998 |
3050 mm diameter, concrete lined in shale |
Person-entry, dimensional analysis, geotechnical assessment |
Extensive cracking and fractures with infiltration |
| Etobicoke Creek STS, High Level Interceptor, Low Level Interceptor |
City of Toronto, 2000 |
1370 mm concrete lined 2750 mm concrete/brick lined 1525 mm brick lined |
Person-entry, dimensional analysis, concrete sampling, corrosion analysis |
1370 mm concrete liner with possible invert heave, 2750 & 1525 mm brick lined with cracking and distortion |
| River Road Interceptor |
Region of Niagara, 2000 |
1 500 mm concrete lined interceptor |
Detailed structural assessment including dimensional analysis, in-situ strength estimates, concrete coring and laboratory material analysis |
Cracks, fractures and infiltration observed with only minor distortion, significant deterioration primarily due to sulphide corrosion of concrete |
| Emergency Repair River Road Interceptor |
Region of Niagara, 2001 |
1 500 mm concrete lined interceptor; failure zone located 85 m d/s of access shaft and 80 m u/s of main pumping station wet well; approximately 20 m deep at the shaft and repair area. |
Detailed structural design, fabrication and installation of emergency repair works, including development and implementation of worker safety and evacuation plan and short term monitoring program. |
Emergency repair comprised pre-fabricated, high strength aluminum frame assembled in the failure zone during regular flow conditions. |
| High Level Interceptor |
City of Toronto (current) |
1 000 m of 2 675 and 2 750 mm cast-in-place concrete interceptor sewer with brick lined invert and full brick lined tunnel sections |
Concrete and brick coring (36 cores at 12 sites), laboratory analysis of samples, detailed in-situ inspections, structural analysis |
Significant material and workmanship deficiencies observed, cracks, fractures, and infiltration documented, recommendations for ongoing action made |
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